WO2006086634A2 - Oxime and hydroxylamine substituted imidazo[4,5-c] ring compounds and methods - Google Patents

Oxime and hydroxylamine substituted imidazo[4,5-c] ring compounds and methods Download PDF

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Publication number
WO2006086634A2
WO2006086634A2 PCT/US2006/004737 US2006004737W WO2006086634A2 WO 2006086634 A2 WO2006086634 A2 WO 2006086634A2 US 2006004737 W US2006004737 W US 2006004737W WO 2006086634 A2 WO2006086634 A2 WO 2006086634A2
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group
alkyl
heteroaryl
aryl
alkenyl
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PCT/US2006/004737
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French (fr)
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WO2006086634A3 (en
Inventor
Tushar A. Kshirsagar
Gregory D. Lundquist, Jr.
Joseph F. Dellaria, Jr.
Matthew R. Radmer
Bernhard M. Zimmermann
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Coley Pharmaceutical Group, Inc.
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Application filed by Coley Pharmaceutical Group, Inc. filed Critical Coley Pharmaceutical Group, Inc.
Priority to EP06720606A priority Critical patent/EP1846405A2/en
Priority to US11/884,153 priority patent/US7968563B2/en
Priority to JP2007555245A priority patent/JP2008530113A/en
Priority to AU2006213746A priority patent/AU2006213746A1/en
Priority to CA002597587A priority patent/CA2597587A1/en
Publication of WO2006086634A2 publication Critical patent/WO2006086634A2/en
Priority to US12/278,872 priority patent/US20090306388A1/en
Priority to PCT/US2007/003797 priority patent/WO2007092641A2/en
Publication of WO2006086634A3 publication Critical patent/WO2006086634A3/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/04—Ortho-condensed systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/12—Antivirals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/12—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains three hetero rings
    • C07D471/14—Ortho-condensed systems

Definitions

  • IRMs immune response modifiers
  • the present invention provides a new class of compounds that are useful in inducing cytokine biosynthesis in animals.
  • Such compounds are of the following Formula I:
  • R A , R B , X, Z, R 1 , and R 2-I are as defined below.
  • the compounds of Formula I are useful as immune response modifiers due to their ability to induce cytokine biosynthesis (e.g., induces the synthesis of at least one cytokine) and otherwise modulate the immune response when administered to animals. This makes the compounds useful in the treatment of a variety of conditions such as viral diseases and tumors that are responsive to such changes in the immune response.
  • the invention further provides pharmaceutical compositions containing an effective amount of a compound of Formula I and methods of inducing cytokine biosynthesis in an animal, treating a viral infection or disease and/or treating a neoplastic disease in an animal by administering an effective amount of a compound of Formula I to the animal.
  • the present invention provides compounds of the following Formulas I, II, III, IV, V, VI, and VII:
  • RA, RB, RAI, RBI, RA2, RB2, R, R', RI 5 R2-1, R3, m, n, p, G, X, and Z are as defined below; and pharmaceutically acceptable salts thereof.
  • the present invention provides a compound of Formula I:
  • Z is selected from the group consisting of:
  • X is selected from the group consisting of a bond, C 1-4 alkylene and C 2-4 alkenylene;
  • R 2-I , R 2-2 , and R 2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O) 0-2 -R 2 -S, -NH-S(O) 2 -R 2-5 , haloalkoxy, halogen, cyano, nitro, -N 3 , aryl, heteroaryl, heterocyclyl, aryloxy
  • R 2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom
  • R 2-4 is selected from the group consisting of hydrogen, C 1-4 alkyl, and phenyl
  • R 2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N 3 ;
  • Y is selected from the group consisting of: a bond
  • RA and R B are each independently selected from the group consisting of: hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and -N(Re) 2 ; or when taken together, RA and R B form a fused benzene ring or fused pyridine ring wherein the fused benzene ring or fused pyridine ring is unsubstituted or substituted by one or more R" 1 groups; or when taken together, R A and R B form a fused cyclohexene ring or a fused tetrahydropyridine ring, wherein the fused cyclohexene or tetrahydropyridine ring is unsubstituted or substituted by one or more R groups; R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
  • R' is hydrogen or a non-interfering substituent
  • R'" is a non-interfering substitutent
  • R 8 is selected from the group consisting of hydrogen, CM O alkyl, C 2-I0 alkenyl, C 1-1O alkoxy-C 1-10 alkylenyl, hydroxy-C 1-10 alkylenyl, heteroaryl-Cj-io alkylenyl, and 10 aryl-C ⁇ 10 alkylenyl ;
  • R 9 is selected from the group consisting of hydrogen and alkyl; and R 10 is C 3-8 alkylene; or a pharmaceutically acceptable salt thereof.
  • the present invention provides a compound of Formula II:
  • Z is selected from the group consisting of:
  • X is selected from the group consisting of a bond, C 1-4 alkylene and C 2-4 alkenylene;
  • R 2 -], R 2-2 , and R 2-3 are independently selected from the group consisting of: hydrogen, 25 alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino,
  • R 2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom
  • R 2-4 is selected from the group consisting of hydrogen, Ci -4 alkyl, and phenyl
  • R 2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N 3
  • Y is selected from the group consisting of: a bond, -C(R 6 )-,
  • R A1 and R B1 are each independently selected from the group consisting of: hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and
  • R 1 is selected from the group consisting of:
  • X 1 is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups;
  • Y' is selected from the group consisting of:
  • R 4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen
  • R 7 is C 2-7 alkylene
  • R 8 is selected from the group consisting of hydrogen, C 1-10 alkyl, C 2-10 alkenyl,
  • R 9 is selected from the group consisting of hydrogen and alkyl; R 10 is C 3-8 alkylene;
  • A is selected from the group consisting of -O-, -C(O)-, -S(O) 0-2 -, -CH 2 -, and
  • a 1 is selected from the group consisting of -0-, -S(O) 0-2 -, -NC-Q-R 4 )-, and -CH 2 -;
  • Q is selected from the group consisting of a bond, -C(R 6 )-, -C(R 6 )-C(R 6 )-,
  • V is selected from the group consisting Of-C(R 6 )-, -0-C(R 6 )-, -N(Rs)-C(R 6 )-, and -S(O) 2 -;
  • W is selected from the group consisting of a bond, -C(O)-, and -S(O) 2 -; and a and b are independently integers from 1 to 6 with the proviso that a + b is ⁇ 7; or a pharmaceutically acceptable salt thereof.
  • the present invention provides a compound of Formula III:
  • X is selected from the group consisting of a bond, C 1-4 alkylene and C 2-4 alkenylene;
  • R 2-1 , R 2-2 , and R 2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino,
  • R 2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom
  • R 2-4 is selected from the group consisting of hydrogen, C 1-4 alkyl, and phenyl
  • R 2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N 3
  • Y is selected from the group consisting of: a bond,
  • R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
  • R 1 is selected from the group consisting of: -R 4 , -X'-R4, -X'-Y'-R ⁇
  • R 3 is selected from the group consisting of:
  • m is 0 or 1, with the proviso that when m is 1 then n is 0 or 1 ;
  • X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups;
  • Y 1 is selected from the group consisting of: -O-,
  • Z' is a bond or -O-
  • R 4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen
  • dialkylamino alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
  • R 5 is selected from the group consisting of:
  • Rg is selected from the group consisting of hydrogen, C 1-10 alkyl, C 2-10 alkenyl, Cj -10 alkoxy-Ci -10 alkylenyl, hydroxy-Ci -10 alkylenyl, heteroaryl-Ci. 10 alkylenyl, and aryl-Ci-io alkylenyl;
  • R 9 is selected from the group consisting of hydrogen and alkyl;
  • R 10 is C 3 .s alkylene;
  • A is selected from the group consisting of -0-, -C(O)-, -S(O) 0-2 -, -CH 2 -, and -NC-Q-R 4 )-;
  • A' is selected from the group consisting of -0-, -S(O) 0-2 -, -NX-Q-R 4 )-, and -CH 2 -;
  • Q is selected from the group consisting of a bond, -C(R 6 )-, -C(R 6 )-C(R 6 )-, -S(O) 2 -, -C(Re)-NCRs)-W-, -S(O) 2 -N(R 8 )-, -C(Re)-O-, -C(Rg)-S-, and -C(Re)-N(OR 9 )-;
  • V is selected from the group consisting of -C(R 6 )-, -0-C(R 6 )-, -N(Rs)-C(R 6 )-, and -S(O) 2 -;
  • W is selected from the group consisting of a bond, -C(O)-, and -S(O) 2 -; and a and b are independently integers from 1 to 6 with the proviso that a + b is ⁇ 7; or a pharmaceutically acceptable salt thereof.
  • the present invention provides a compound of Formula IV:
  • Z is selected from the group consisting of: -C(R 2-4 )(-N(-OR 2-2 )-Y-R 2-3 )-;
  • X is selected from the group consisting of a bond, C 1-4 alkylene and
  • R2-i, R2-2, and R 2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O) 0-2 -R 2-5 , -NH-S(O) 2 -R 2-5 , haloalkoxy, halogen, cyano, nitro, -N 3 , aryl, heteroaryl, heterocyclyl, aryloxy, aryl
  • R 2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom;
  • R 2-4 is selected from the group consisting of hydrogen, and phenyl
  • R 2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N 3
  • Y is selected from the group consisting of: a bond, -C(R 6 )-, -S(O) 2 -, -S(O) 2 -N(R 8 )-,
  • R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
  • n is an integer from 0 to 4.
  • Ri is selected from the group consisting of:
  • X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups;
  • Y' is selected from the group consisting of:
  • -0-N C(R 4 )-, -C(HN-O-R 8 )-,
  • R 4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen
  • R 5 is selected from the group consisting of:
  • R 8 is selected from the group consisting of hydrogen, C 1-10 alkyl, C 2- I 0 alkenyl, C 1-I o alkoxy-Ci -10 alkylenyl, hydroxy-Ci_ 10 alkylenyl, heteroaryl-Ci.ioalkylenyl, and aryl-C i . 10 alkylenyl ;
  • R 9 is selected from the group consisting of hydrogen and alkyl;
  • A is selected from the group consisting of -O-, -C(O)-, -S(O) 0-2 -, -CH 2 -, and -NO-Q-R 4 )-;
  • A' is selected from the group consisting of -O-, -S(O) 0-2 -, -N(-Q-R_s)-, and -CH 2 -;
  • Q is selected from the group consisting of a bond, -C(R 6 )-, -C(R 6 )-C(R 6 )-,
  • V is selected from the group consisting of -C(R 6 )-, -0-C(R 6 )-, -N(Rg)-C(R 6 )-, and -S(O) 2 -;
  • W is selected from the group consisting of a bond, -C(O)-, and -S(O) 2 -; and a and b are independently integers from 1 to 6 with the proviso that a + b is ⁇ 7; or a pharmaceutically acceptable salt thereof.
  • the present invention provides a compound of Formula V:
  • X is selected from the group consisting of a bond, C 1-4 alkylene and C 2-4 alkenylene;
  • R 2- I, R 2-2 , and R 2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino,
  • R 2 . 2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom;
  • R 2-4 is selected from the group consisting of hydrogen, Ci -4 alkyl, and phenyl;
  • R 2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N 3 ; Y is selected from the group consisting of: a bond, -C(R 6 )-, -S(O) 2 -, -S(O) 2 -N(R 8 )-,
  • R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and p is an integer from 0 to 3;
  • Ri is selected from the group consisting of:
  • R 3 is selected from the group consisting of:
  • m is 0 or 1 , with the proviso that when m is 1 then p is 0 or 1 ;
  • X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups;
  • Y 1 is selected from the group consisting of: -O-,
  • Z' is a bond or -O- ;
  • R 4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen
  • dialkylamino alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
  • R 5 is selected from the group consisting of: -N C(R 6 ) -N- S(O) 2
  • R 9 is selected from the group consisting of hydrogen and alkyl; Rio is C 3-8 alkylene; A is selected from the group consisting of -O-, -C(O)-, -S(0)o -2 -, -CH 2 -, and
  • A' is selected from the group consisting of -O-, -S(0)o -2 -, -NC-Q-R 4 )-, and -CH 2 -;
  • Q is selected from the group consisting of a bond, -C(R 6 )-, -C(R 6 )-C(R 6 )-, -S(O) 2 -, -C(R 6 )-N(R 8 )-W-, -S(O) 2 -N(R 8 )-, -C(Rg)-O-, -C(Rg)-S-, and -C(Rg)-N(OR 9 )-;
  • V is selected from the group consisting of -C(R 6 )-, -0-C(R 6 )-, -N(Rg)-C(R 6 )-, and
  • W is selected from the group consisting of a bond, -C(O)-, and -S(O) 2 -; and a and b are independently integers from 1 to 6 with the proviso that a + b is ⁇ 7; or a pharmaceutically acceptable salt thereof.
  • the present invention provides a compound of Formula VI:
  • X is selected from the group consisting of a bond, Ci -4 alkylene and C 2-4 alkenylene;
  • R2-1, R2-2, and R 2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O) 0-2 -R 2-5 , -NH-S(O) 2 -R 2-5 , haloalkoxy, halogen, cyano, nitro, -N 3 , aryl, heteroaryl, heterocyclyl, aryloxy, arylal
  • R 2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom
  • R 2-4 is selected from the group consisting of hydrogen, Ci -4 alkyl, and phenyl
  • R 2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N 3
  • Y is selected from the group consisting of: a bond,
  • R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and -N(R 9 ) 2 ;
  • p is an integer from 0 to 3;
  • R 1 is selected from the group consisting of:
  • X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups;
  • Y' is selected from the group consisting of: -O-,
  • R 4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen
  • R 5 is selected from the group consisting of:
  • R 7 is C 2-7 alkylene;
  • Rg is selected from the group consisting of hydrogen, C 1-10 alkyl, C 2 - J0 alkenyl,
  • R 9 is selected from the group consisting of hydrogen and alkyl;
  • R 1 O is C 3-8 alkylene;
  • A is selected from the group consisting of -O-, -C(O)-, -S(O) 0-2 -, -CH 2 -, and
  • A' is selected from the group consisting of -O-, -S(O) 0-2 -, -NO-Q-R 4 )-, and -CH 2 -;
  • Q is selected from the group consisting of a bond, -C(R 6 )-, -C(R 6 )-C(R 6 )-, -S(O) 2 -, -C(R 6 )-N(R 8 )-W-, -S(O) 2 -N(R 8 )-, -C(Rg)-O-, -C(Rg)-S-, and -C(Rg)-N(OR 9 )-;
  • V is selected from the group consisting of -C(R 6 )-, -0-C(R 6 )-, -N(Rs)-C(R 6 )-, and
  • W is selected from the group consisting of a bond, -C(O)-, and -S(O) 2 -; and a and b are independently integers from 1 to 6 with the proviso that a + b is ⁇ 7; or a pharmaceutically acceptable salt thereof.
  • the present invention provides a compound of Formula
  • G is selected from the group consisting of: -C(O)-R", ⁇ -aminoacyl, ⁇ -aminoacyl- ⁇ -aminoacyl, -C(O)-O-R", -C(O)-N(R im )R",
  • R" and R"" are independently selected from the group consisting of Cj -1O alkyl, C 3-7 cycloalkyl, phenyl, and benzyl, each of which may be unsubstituted or substituted by one or more substituents independently selected from the group consisting of halogen, hydroxy, nitro, cyano, carboxy, C 1-6 alkyl, Ci -4 alkoxy, aryl, heteroaryl, aryl-C 1-4 alkylenyl, heteroaryl-C 1-4 alkylenyl, halo-C 1-4 alkylenyl, halo-C 1-4 alkoxy, -0-C(O)-CH 3 ,
  • R" can also be hydrogen
  • ⁇ -aminoacyl is an ⁇ -aminoacyl group derived from an ⁇ -amino acid selected from the group consisting of racemic, D-, and L-amino acids
  • Yi is selected from the group consisting of hydrogen, C 1-6 alkyl, and benzyl;
  • Y 0 is selected from the group consisting of Ci -6 alkyl, carboxy-C 1-6 alkylenyl, amino-C 1-4 alkylenyl, mono-iV-C 1-6 alkylamino-C 1-4 alkylenyl, and di-iV, JV-C 1-6 alkylamino-C 1-4 alkylenyl;
  • Y 2 is selected from the group consisting of mono-N-d-ealkylamino, di- ⁇ JV-C 1-6 alkylamino, morpholin-4-yl, piperidin-1 -yl, pyrrolidin-1-yl, and 4-Ci- 4 alkylpiperazin-1-yl;
  • RA 2 and RB 2 are each independently selected from the group consisting of: hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and •
  • RA 2 and R B2 form a fused benzene ring or fused pyridine ring wherein the fused benzene ring or fused pyridine ring is unsubstituted or substituted by one R 3 group, or one R 3 group and one R group, or one, two, three, or four R groups when on the fused benzene ring, or one, two, or three R groups when on the fused pyridine ring; or when taken together, RA 2 and RB 2 form a fused cyclohexene ring or a fused tetrahydropyridine ring, wherein the fused cyclohexene or tetrahydropyridine ring is unsubstituted or substituted by one or more R groups; and
  • X, Z, R 2-1 , R 1 , R, and R 3 are defined as in Formula III above; or a pharmaceutically acceptable salt thereof.
  • the present invention provides an intermediate compound of Formula VIII:
  • R 1 is preferrably tetrahydro-2H-pyran-4- ylmethyl as shown in Formula Villa:
  • non-interfering means that the ability of the compound or salt, which includes a non-interfering substituent, to modulate the biosynthesis of one or more cytokines is not destroyed by the non-interfering substituent.
  • R'" is a non-interfering substituent.
  • Illustrative non-interfereing R 1 groups include those described above for R 1 .
  • Illustrative non-interfering R'" groups include those described above for R and R 3 .
  • alkyl As used herein, the terms “alkyl”, “alkenyl”, “alkynyl” and the prefix “alk-” are inclusive of both straight chain and branched chain groups and of cyclic groups, e.g., cycloalkyl and cycloalkenyl. Unless otherwise specified, these groups contain from 1 to 20 carbon atoms, with alkenyl groups containing from 2 to 20 carbon atoms, and alkynyl groups containing from 2 to 20 carbon atoms. In some embodiments, these groups have a total of up to 10 carbon atoms, up to 8 carbon atoms, up to 6 carbon atoms, or up to 4 carbon atoms.
  • Cyclic groups can be monocyclic or polycyclic and preferably have from 3 to 10 ring carbon atoms.
  • Exemplary cyclic groups include cyclopropyl, cyclopropylmethyl, cyclobutyl, cyclobutylmethyl, cyclopentyl, cyclopentylmethyl, cyclohexyl, cyclohexylmethyl, adamantyl, and substituted and unsubstituted bornyl, norbornyl, and norbornenyl.
  • alkylene alkenylene
  • alkynylene are the divalent forms of the “alkyl”, “alkenyl”, and “alkynyl” groups defined above.
  • alkylenyl alkenylenyl
  • alkynylenyl use when “alkylene”, “alkenylene”, and “alkynylene”, respectively, are substituted.
  • an arylalkylenyl group comprises an alkylene moiety to which an aryl group is attached.
  • haloalkyl is inclusive of groups that are substituted by one or more halogen atoms, including perfluorinated groups. This is also true of other groups that include the prefix “halo-.” Examples of suitable haloalkyl groups are chloromethyl, trifluoromethyl, and the like.
  • aryl as used herein includes carbocyclic aromatic rings or ring systems. Examples of aryl groups include phenyl, naphthyl, biphenyl, fluorenyl and indenyl.
  • heteroatom refers to the atoms O, S, or N.
  • heteroaryl includes aromatic rings or ring systems that contain at least one ring heteroatom (e.g., O, S, N).
  • heteroaryl includes a ring or ring system that contains 2-12 carbon atoms, 1-3 rings, 1-4 heteroatoms, and O, S, and N as the heteroatoms.
  • heteroaryl groups include furyl, thienyl, pyridyl, quinolinyl, isoquinolinyl, indolyl, isoindolyl, triazolyl, pyrrolyl, tetrazolyl, imidazolyl, pyrazolyl, oxazolyl, thiazolyl, benzofuranyl, benzothiophenyl, carbazolyl, benzoxazolyl, pyrimidinyl, benzimidazolyl, quinoxalinyl, benzothiazolyl, naphthyridinyl, isoxazolyl, isothiazolyl, purinyl, quinazolinyl, pyrazinyl, 1-oxidopyridyl, pyridazinyl, triazinyl, tetrazinyl, oxadiazolyl, thiadiazolyl, and so on.
  • heterocyclyl includes non-aromatic rings or ring systems that contain at least one ring heteroatom (e.g., O, S 5 N) and includes all of the fully saturated and partially unsaturated derivatives of the above mentioned heteroaryl groups.
  • heterocyclyl includes a ring or ring system that contains 2-12 carbon atoms, 1-3 rings, 1-4 heteroatoms, and O, S, and N as the heteroatoms.
  • heterocyclyl groups include pyrrolidinyl, tetrahydrofuranyl, morpholinyl, thiomorpholinyl, 1,1- dioxothiomorpholinyl, piperidinyl, piperazinyl, thiazolidinyl, imidazolidinyl, isothiazolidinyl, tetrahydropyranyl, quinuclidinyl, homopiperidinyl (azepanyl), 1 ,4- oxazepanyl, homopiperazinyl (diazepanyl), 1,3-dioxolanyl, aziridinyl, azetidinyl, dihydroisoquinolin-(lif)-yl, octahydroisoquinolin-(lH)-yl, dihydroquinolin-(2H)-yl, octahydroquinolin-(2H)-yl, dihydro-l,
  • heterocyclyl includes bicylic and tricyclic heterocyclic ring systems. Such ring systems include fused and/or bridged rings and spiro rings. Fused rings can include, in addition to a saturated or partially saturated ring, an aromatic ring, for example, a benzene ring. Spiro rings include two rings joined by one spiro atom and three rings joined by two spiro atoms.
  • heterocyclyl contains a nitrogen atom
  • the point of attachment of the heterocyclyl group may be the nitrogen atom
  • arylene is the divalent forms of the "aryl”, “heteroaryl”, and “heterocyclyl” groups defined above.
  • arylenyl is used when “arylene”, “heteroarylene”, and “heterocyclylene”, respectively, are substituted.
  • an alkylarylenyl group comprises an arylene moiety to which an alkyl group is attached.
  • each group is independently selected, whether explicitly stated or not.
  • each R 8 group is independently selected for the formula -N(Rs)-C(O)-N(Rg)- each R 8 group is independently selected.
  • each R 4 group is independently selected when more than one Y 1 group is present and each Y' group contains one or more R 8 groups, then each Y 1 group is independently selected, and each R 8 group is independently selected.
  • the invention is inclusive of the compounds described herein in any of their pharmaceutically acceptable forms, including isomers (e.g., diastereomers and enantiomers), salts, solvates, polymorphs, prodrugs, and the like.
  • isomers e.g., diastereomers and enantiomers
  • salts e.g., sodium bicarbonate
  • solvates e.g., sodium bicarbonate
  • polymorphs e.g., sodium bicarbonate
  • prodrugs e.g., sodium bicarbonate
  • the term “compound” includes any or all of such forms, whether explicitly stated or not (although at times, “salts" are explicitly stated).
  • prodrug means a compound that can be transformed in vivo to yield an immune response modifying compound, including any of the salt, solvated, polymorphic, or isomeric forms described above.
  • the prodrug itself, may be an immune response modifying compound, including any of the salt, solvated, polymorphic, or isomeric forms described above.
  • the transformation may occur by various mechanisms, such as through a chemical (e.g., solvolysis or hydrolysis, for example, in the blood) or enzymatic biotransformation.
  • a discussion of the use of prodrugs is provided by T. Higuchi and W. Stella, "Pro-drugs as Novel Delivery Systems," Vol. 14 of the A. C. S. Symposium Series, and in Bioreversible Carriers in Drug Design, ed. Edward B. Roche, American Pharmaceutical Association and Pergamon Press, 1987.
  • each one of the following variables e.g., Z, X, Y, Y', RAI, RBI, R, RI 5 R2-i > R3 > Q 9 G, n, and so on
  • each one of the following variables e.g., Z, X, Y, Y', RAI, RBI, R, RI 5 R2-i > R3 > Q 9 G, n, and so on
  • each of the resulting combinations of variables is an embodiment of the present invention.
  • R"' is a non-interfering substituent.
  • the one or more R" 1 groups are one R 3 group, or one R 3 group and one R group, or one, two, three, or four R groups when on the fused benzene ring, or one, two, or three R groups when on the fused pyridine ring; wherein R 3 is selected from the group consisting of -Z ⁇ R 4 , -Z'-X'-Rj, -Z 1 -X' -Y' -R 4 , -Z'-X'-Y'-X'-Y'-R,, and -Z'-X'-R 5 .
  • RA and RB or RA 2 and RB 2 are each independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and -N(Rg) 2 .
  • RA and RB or RA 2 and RB 2 are each independently selected from the group consisting of hydrogen and alkyl.
  • RA and R B or RA 2 and RB 2 are both methyl.
  • Formula I 5 RA and R B are taken together to form a fused benzene ring wherein the benzene ring is unsubstituted or substituted by one or more R'" groups.
  • the fused benzene ring is substituted by one or two R'" groups.
  • the one or two R'" groups are one R 3 group, or one R 3 group and one R group.
  • the fused benzene ring is unsubstituted.
  • RA 2 and R B2 are taken together to form a fused benzene ring wherein the benzene ring is unsubstituted or substituted by one R 3 group, or one R 3 group and one R group. In certain of these embodiments, the fused benzene ring is unsubstituted.
  • RA and RB are taken together to form a fused pyridine ring wherein the pyridine ring is unsubstituted or substituted by one or more R" groups.
  • the fused pyridine ring is substituted by one or two R'" groups.
  • the one or two R'" groups are one R 3 group, or one R 3 group and one R group.
  • pyridine ring is , wherein the highlighted bond is the position where the ring is fused. In certain of these embodiments, the fused pyridine ring is unsubstituted.
  • RA 2 and RB 2 are taken together to form a fused pyridine ring wherein the pyridine ring is unsubstituted or substituted by one R 3 group, or one R 3 group and one R group.
  • pyridine ring is O- , wherein the highlighted bond is the position where the ring is fused. In certain of these embodiments, the fused pyridine ring is unsubstituted.
  • R A and R B or R A2 and RB 2 are taken together to form a fused cyclohexene ring wherein the fused cyclohexene ring is unsubstituted or substituted by one or more R groups.
  • the double bond in the cyclohexene ring is the position where the ring is fused. In certain of these embodiments, the fused cyclohexene ring is unsubstituted.
  • RA and RB or R A2 and RB 2 are taken together to form a fused tetrahydropyridine ring, wherein the fused tetrahydropyridine ring is unsubstituted or substituted by one or more R groups.
  • the double bond in the tetrahydropyridine ring is the position where the ring is fused.
  • the tetrahydropyridine ring is ONH , wherein the highlighted bond indicates the position where the ring is fused. In certain of these embodiments, the fused tetrahydropyridine ring is unsubstituted.
  • R is hydrogen or a non-interfering substituent.
  • R' is a non-interfering substituent.
  • R is R 1 ; wherein R 1 is selected from the group consisting Of -R 4 , -X-R 4 , -X-T-R 4 , -X-Y-X-Y-R 4 , and -X'-R 5 .
  • R A I and RBI are each independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and -N(Rg) 2 .
  • RA 1 and R B I are each independently selected from the group consisting of hydrogen and alkyl.
  • RAI and R B1 are both methyl.
  • R is halogen or hydroxy.
  • R is bromine
  • n 0.
  • p 0.
  • R 3 is benzyloxy.
  • R 3 is selected from the group consisting of phenyl, pyridin-3-yl, pyridin-4-yl, 5 ⁇ (hydroxymethyl)pyridin-3-yl, 2-ethoxyphenyl, 3- (morpholine-4-carbonyl)phenyl, and 3 -(N, iV-dimethylaminocarbonyl)phenyl .
  • R 3 is benzyloxy.
  • R 3 is selected from the group consisting of phenyl, pyridin-3-yl, pyridin-4-yl, 5 ⁇ (hydroxymethyl)pyridin-3-yl, 2-ethoxyphenyl, 3- (morpholine-4-carbonyl)phenyl, and 3 -(N, iV-dimethylaminocarbonyl)phenyl .
  • Z is -C( ⁇ N-O-R 2-2 )-
  • Z is -C(R 2-4 )(-N(-OR 2-2 )- Y-R 2-3 )-.
  • R 2-4 is hydrogen.
  • Y is a bond.
  • R 2-3 is selected from the group consisting of hydrogen and alkyl.
  • Y is selected from the group consisting of -C(O)-, -S(O) 2 -, and -C(O)-NH-.
  • R 2-3 is alkyl.
  • R 2-2 is selected from the group consisting of hydrogen, alkyl, arylalkylenyl, and heteroarylalkylenyl.
  • R 2-2 is hydrogen, C 1-4 alkyl, benzyl, or pyridin-2-ylmethyl.
  • R 2-1 is selected from the group consisting of hydrogen, alkyl, and aryl.
  • R 2- I is hydrogen, Ci -4 alkyl, or phenyl.
  • X is a bond or C 1-4 alkylene.
  • X is a bond, methylene, or ethylene.
  • R 1 is selected from the group consisting of -R 4 , -X' -R 4 , -X'- Y'-R t , -X'-Y'-X'-Y'-R,, and -X'-R 5 .
  • R 1 is selected from the group consisting of alkyl, arylalkylenyl, aryloxyalkylenyl, hydroxyalkyl, dihydroxyalkyl, alkylsulfonylalkylenyl, -X'-Y'-Rj, -X'-R 5 , and heterocyclylalkylenyl; wherein the heterocyclyl of the heterocyclylalkylenyl group is optionally substituted by one or more alkyl groups; wherein X' is alkylene; Y' is
  • R 4 is alkyl, aryl,
  • R 5 is R 7 R? , or ( CH 2)b- ⁇ .
  • R 1 is selected from the group consisting of 2-hydroxy-2-methylpropyl, 2-methylpropyl, propyl, ethyl, methyl, 2,3-dihydroxypropyl, 2-phenoxyethyl, 4-[(methylsulfonyl)amino]butyl, 2- methyl-2-[(methylsulfonyl)amino]propyl, 2-(acetylamino)-2-methylpropyl, 2- ⁇ [(isopropylamino)carbonyl]amino ⁇ -2-methylpropyl, 4- ⁇ [(isopropylamino)carbonyl]amino ⁇ butyl, 4-(l,l-dioxidoisothiazolidin-2-yl)butyl, tetrahydro-2H-pyran-4-ylmethyl, and (2,2-dimethyl-l,3-dioxolan-4-yl)methyl.
  • R 1 is selected from the group consisting of (1- hydroxycyclobutyl)methyl, ( 1 -hydroxycyclopentyl)methyl, and ( 1 - hydroxycyclohexyl)methyl.
  • R 1 is (1- hy dr oxy cy clobuty l)methy 1.
  • R is selected from the group consisting of halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and -N(R 9 ) 2 .
  • R is selected from the group consisting of alkyl, alkoxy, hydroxy, halogen, and trifluoromethyl.
  • R is halogen or hydroxy
  • R is bromine
  • R 2-1 , R 2-2 , and R 2-3 are independently selected from the group consisting of hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, or heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O) 0-2 -R 2-S , -NH-S(O) 2 -R 2-5 , haloalkoxy, halogen, cyano, nitro, -N 3 , aryl, heteroaryl, heterocyclyl, aryl
  • R 2- is hydrogen, C 1-4 alkyl, or phenyl.
  • R 2-1 is hydrogen
  • R 2-2 is selected from the group consisting of hydrogen, alkyl, arylalkylenyl, and heteroarylalkylenyl.
  • R 2-2 is hydrogen, Ci -4 alkyl, benzyl, or pyridin-2- ylmethyl.
  • R 2-2 is Ci -10 alkyl.
  • R 2-2 is methyl.
  • R 2-2 is hydrogen.
  • R 2-3 is selected from the group consisting of hydrogen and alkyl.
  • R 2-3 is alkyl
  • R 2-3 is hydrogen or methyl.
  • R 2-4 is selected from the group consisting of hydrogen,
  • R 2-4 is hydrogen
  • R 2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N 3 .
  • R 2-5 is hydrogen or alkyl.
  • R 2-5 is hydrogen or C 1-4 alkyl.
  • R 3 is selected from the group consisting of -Z ⁇ R 4 , -Z'-X'-R ⁇ -Z'-X'-Y'-R 4 , -Z'-X'-Y'-X'-Y'-R ⁇ and -Z'-X'-R 5 .
  • R 3 is selected from the group consisting of -Z ⁇ R 4 , -Z'-X'-Y'-R4, and -Z'-X'-R 5 .
  • R 3 is -Z'-R ⁇
  • R 3 is -Z'-X'-Y'-R 4 .
  • R 3 is -Z'-X'-Rs.
  • R 3 is selected from the group consisting of phenyl, pyridin-3-yl, pyridin-4-yl, 5-(hydroxymethyl)pyridin-3-yl, 2-ethoxyphenyl, 3- (mor ⁇ holine-4-carbonyl)phenyl, and 3 -(N, N-dimethylaminocarbonyl)phenyl .
  • -R 3 is at the 7-position.
  • R 4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, .aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy
  • R 4 is hydrogen or alkyl.
  • R 4 is C 1-4 alkyl.
  • R 5 is selected from the group consisting of:
  • R 5 is selected from the group consisting of: - " NIN-— C VA(RI-V 6 ) -N / -
  • R 5 is
  • R 5 is wherein V is -C(O)-, and A is -0-.
  • R 7 is C 2-7 alkylene.
  • R 7 is C 2-4 alkylene.
  • R 8 is selected from the group consisting of hydrogen,
  • C 1-1O alkyl C 2-10 alkenyl, Cj -10 alkoxy-d-ioalkylenyl, hydroxy-C 1-10 alkylenyl, heteroaryl-C 1-10 alkylenyl, and aryl-Ci -10 alkylenyl.
  • R 8 is selected from the group consisting of hydrogen, C 1-4 alkyl, and C 1-4 alkoxyC 1-4 alkylenyl.
  • R 8 is hydrogen or C 1-4 alkyl.
  • R 8 is hydrogen
  • R 9 is selected from the group consisting of hydrogen and alkyl.
  • R 10 is C 3-8 alkylene.
  • R 10 is C 4-6 alkylene.
  • A is selected from the group consisting of -O-, -C(O)-, -S(O) 0-2 -, -CH 2 -, and -NOQ-R 4 )-.
  • A is -O-, -CH 2 -, or -S(O) 2 -.
  • A is -O- or -S(O) 2 -.
  • A is -0-.
  • A' is selected from the group consisting of -0-, -S(O) 0-2 -, -NC-Q-R 4 )-, and -CH 2 -.
  • a 1 is selected from the group consisting Of-CH 2 -, -S(O) 2 -, and -0-.
  • A' is -NX-Q-R 4 )-.
  • A' is -CH 2 -. In certain embodiments, A' is -O- .
  • G is selected from the group consisting of-C(O)-R", ⁇ -aminoacyl, ⁇ -aminoacyl- ⁇ - aminoacyl, -C(O)-O-R", -C(0)-N(R"")R", -CH(OH)-C(O)-OY 1 , -CH(OCi -4 alkyl)Y 0 , -CH 2 Y 2 , and -CH(CH 3 )Y 2 .
  • R" and R"" are independently selected from the group consisting of C 1-I o alkyl, C 3-7 cycloalkyl, phenyl, and benzyl, each of which may be unsubstituted or substituted by one or more substituents independently selected from the group consisting of halogen, hydroxy, nitro, cyano, carboxy, C 1-6 alkyl, C 1-4 alkoxy, aryl, heteroaryl, aryl-C 1-4 alkylenyl, heteroaryl-C 1-4 alkylenyl, halo-Ci -4 alkylenyl, halo-C ⁇ alkoxy, -0-C(O)-CH 3 , -C(O)-O-CH 3 , -C(O)-NH 2 , -0-CH 2 -C(O)-NH 2 , -NH 2 , and -S(O) 2 -NH 2 , with the proviso that R"" can
  • G is selected from the group consisting of -C(O)-R", ⁇ -aminoacyl, and -C(O)-O-R".
  • G is selected from the group consisting of -C(O)-R", ⁇ -amino-C 2-11 acyl, and -C(O)-O-R".
  • ⁇ -Amino-C 2 . ⁇ acyl includes ⁇ -amino acids containing a total of at least 2 carbon atoms and a total of up to 11 carbon atoms, and may also include one or more heteroatoms selected from the group consisting of O, S, and N.
  • R" contains one to ten carbon atoms.
  • ⁇ -aminoacyl is an ⁇ -aminoacyl group derived from a naturally occuring ⁇ -amino acid selected from the group consisting of racemic, D-, and L- amino acids.
  • ⁇ -aminoacyl is an ⁇ -aminoacyl group derived from an ⁇ - amino acid found in proteins, wherein the the ⁇ -amino acid is selected from the group consisting of racemic, D-, and L-amino acids.
  • Q is selected from the group consisting of a bond, -C(R 6 )-, -C(Rg)-C(R 6 )-, -S(O) 2 -, -C(R 6 )-N(R 8 )-W-, -S(O) 2 -N(R 8 )-, -C(Re)-O-, -C(R 6 )S-, and -C(Rs)-N(OR 9 )-.
  • Q is selected from the group consisting of a bond, -C(O)-, -S(O) 2 -, and -C(Re)-N(R*)-.
  • Q is -C(O)-.
  • V is selected from the group consisting of -C(R 6 )-,
  • V is selected from the group consisting of -C(O)- and -N(Rs)-C(O)-.
  • V is -C(O)-.
  • W is selected from the group consisting of a bond, -C(O)-, and -S(O) 2 -.
  • W is a bond
  • X is selected from the group consisting of a bond, C 1-4 alkylene and C 2-4 alkenylene.
  • X is a bond or C 1-4 alkylene.
  • X is a bond, methylene, or ethylene.
  • X 1 is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups.
  • X' is alkylene
  • X' is phenylene.
  • Y is selected from the group consisting of a bond,
  • Y is selected from the group consisting of -C(O)-, -S(O) 2 -,
  • Y is selected from the group consisting of -C(O)-, -S(O) 2 -, and -C(O)-N(H)-.
  • Y is a bond. In certain embodiments, Y' is selected from the group consisting of -0-, -S(O) 0-2 -,
  • Y 1 is -N(Rg)-C(O)-, -N(Rg)-S(O) 2 -, -N(Rg)-C(O)-N(R 8 )-,
  • Z' is a bond or -O- . In certain embodiments, Z' is a bond. In certain embodiments, Z' is -0-. In certain embodiments, a and b are independently integers from 1 to 6 with the proviso that a + b is ⁇ 7.
  • a and b are each 2.
  • n is an integer form O to 4. In certain embodiments, n is O or 1.
  • n 0.
  • p is an integer form 0 to 3.
  • p is 0 or 1. In certain embodiments, p is 0.
  • n is 0 or l.
  • m is 0 or 1; with the proviso that when m is 1, then p is 0 or l. In certain embodiments, m is 0.
  • n 1
  • the present invention provides a pharmaceutical composition
  • a pharmaceutical composition comprising a therapeutically effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa, and a pharmaceutically acceptable carrier.
  • the present invention provides a method of inducing cytokine biosynthesis in an animal comprising administering an effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa, or a pharmaceutical composition comprising an effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa to the animal.
  • the cytokine is selected from the group consisting of IFN- ⁇ , TNF- ⁇ , IL-6, IL-10, and IL- 12.
  • the cytokine is IFN- ⁇ or TNF- ⁇ .
  • the cytokine is IFN- ⁇ .
  • the present invention provides a method of treating a viral disease in an animal comprising administering a therapeutically effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa, or a pharmaceutical composition comprising a therapeutically effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa to the animal.
  • the present invention provides a method of treating a neoplastic disease in an animal comprising administering a therapeutically effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa, or a pharmaceutical composition comprising a therapeutically effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa to the animal.
  • Compounds of the invention may be synthesized by synthetic routes that include processes analogous to those well known in the chemical arts, particularly in light of the description contained herein.
  • the starting materials are generally available from commercial sources such as Aldrich Chemicals (Milwaukee, Wisconsin, USA) or are readily prepared using methods well known to those skilled in the art (e.g., prepared by methods generally described in Louis F. Fieser and Mary Fieser, Reagents for Organic Synthesis, v. 1-19, Wiley, New York, (1967-1999 ed.); Alan R. Katritsky, Otto Meth- Cohn, Charles W. Rees, Comprehensive Organic Functional Group Transformations, v. 1- 6, Pergamon Press, Oxford, England, (1995); Barry M. Trost and Ian Fleming,
  • reaction schemes depicted below provide potential routes for synthesizing the compounds of the present invention as well as key intermediates.
  • EXAMPLES section below For more detailed description of the individual reaction steps, see the EXAMPLES section below.
  • Other synthetic routes may be used to synthesize the compounds of the invention.
  • specific starting materials and reagents are depicted in the reaction schemes and discussed below, other starting materials and reagents can be easily substituted to provide a variety of derivatives and/or reaction conditions.
  • many of the compounds prepared by the methods described below can be further modified in light of this disclosure using conventional methods well known to those skilled in the art.
  • Suitable amino protecting groups include acetyl, trifluoroacetyl, f ⁇ rt-butoxycarbonyl (Boc), benzyloxycarbonyl, and 9- fluorenylmethoxycarbonyl (Fmoc).
  • Suitable hydroxy protecting groups include acetyl and silyl groups such as the ter t-bntyl dimethylsilyl group.
  • Such techniques may include, for example, all types of chromatography (high performance liquid chromatography (HPLC), column chromatography using common absorbents such as silica gel, and thin layer chromatography), recrystallization, and differential (i.e., liquid- liquid) extraction techniques.
  • HPLC high performance liquid chromatography
  • column chromatography using common absorbents such as silica gel
  • thin layer chromatography such as silica gel
  • recrystallization i.e., differential (i.e., liquid- liquid) extraction techniques.
  • Step (1) of Reaction Scheme I a quinoline-3,4-diamine of Formula X is reacted with a carboxylic acid equivalent, which is selected such that it will provide the desired - X-CH 2 -HaI substituent in a l//-imidazo[4,5-c]quinoline of Formula XI.
  • Suitable carboxylic acid equivalents include ortho esters, acid halides, and imidates or salts thereof.
  • the reaction can be carried out at an elevated temperature such as 80 0 C or the reflux temperature of the solvent.
  • the product can be isolated by conventional methods.
  • Ethyl chloroacetimidate hydrochloride which can be used to provide a compound of Formula XI in which X is a bond, is a known compound that can be prepared according to the literature procedure: Stillings, M. R. et al., J Med. Chem., 29, pp. 2280-2284 (1986).
  • the reaction is conveniently carried out by adding the acid halide to a solution of a quinoline-3,4-diamine of Formula X in a suitable solvent such as dichloromethane or 1,2-dichloroethane in the presence of a tertiary amine such as triethylamine.
  • a suitable solvent such as dichloromethane or 1,2-dichloroethane
  • the reaction can be carried out at ambient temperature or at a sub-ambient temperature.
  • the product can be isolated by conventional methods.
  • the reaction with an acid halide of formula HaI-CH 2 -X-C(O)Cl or HaI-CH 2 -X-C(O)Br may be carried out in two parts, which include (i) adding the acid halide to a solution of a quinoline-3,4-diamine of Formula X in a suitable solvent such as dichloromethane or 1,2-dichloroethane optionally in the presence of a tertiary amine such as triethylamine to afford an amide intermediate and (ii) cyclizing to provide a IH- imidazo[4,5-c]quinoline of Formula XI.
  • the amide intermediate from part (i) can be optionally isolated using conventional techniques.
  • the cyclization in part (ii) may be carried out by heating the amide intermediate from part (i) in a suitable solvent such as toluene.
  • a suitable solvent such as toluene.
  • the cyclization in part (ii) can also be carried out in the presence of a base such as triethylamine.
  • step (2) of Reaction Scheme I a lH-imidazo[4,5-c]quinoline of Formula XI is oxidized to provide an iV-oxide of Formula XII using a conventional oxidizing agent that is capable of forming JV-oxides.
  • the reaction can be carried out by treating a solution of a compound of Formula XI in a suitable solvent such as chloroform or dichloromethane with 3-chloroperoxybenzoic acid at room temperature, and the product can be isolated by conventional methods.
  • step (3) of Reaction Scheme I -a lH-imidazo[4,5-c]quinoline-5iV-oxide of
  • Formula XII is animated to provide a lH-imidazo[4,5-c]quinolin-4-amine of Formula XIII.
  • Step (3) involves the activation of an JV-oxide of Formula XII by conversion to an ester and then reacting the ester with an animating agent.
  • Suitable activating agents include alkyl- or arylsulfonyl chlorides such as benzenesulfonyl chloride, methanesulfonyl chloride, orp-toluenesulfonyl chloride.
  • Suitable aminating agents include ammonia, in the form of ammonium hydroxide, for example, and ammonium salts such as ammonium carbonate, ammonium bicarbonate, and ammonium phosphate.
  • the reaction is conveniently carried out by adding ammonium hydroxide to a solution of the iV-oxide of Formula XII in a suitable solvent such as dichloromethane or chloroform and then adding /7-toluenesulfonyl chloride.
  • the reaction can be carried out at room temperature, and the product or a pharmaceutically acceptable salt thereof can be isolated from the reaction mixture using conventional methods.
  • the oxidation and animation can be carried out as a one-pot procedure without isolating the JV-oxide of Formula XII by adding 3-chloroperoxybenzoic acid to a solution of a compound of Formula XI in a solvent such as dichloromethane or chloroform and then adding ammonium hydroxide and/>-toluenesulfonyl chloride.
  • a solvent such as dichloromethane or chloroform
  • ammonium hydroxide and/>-toluenesulfonyl chloride can be isolated by conventional methods.
  • Some compounds of Formula XIII are known, see for example, International Publication Nos. WO2005/048933 and WO2005/048945.
  • step (4) of Reaction Scheme I the Hal group of a lif-imidazo[4,5-c]quinolin-4- amine of Formula XIII is displaced with a hydroxylamine of formula HN(Y-R 2-3 )OR 2-2 or a salt thereof.
  • the reaction is conveniently carried out by combining a hydroxylamine salt of the formula HN(Y-R 2-3 )OR 2 . 2 »HC1 with a compound of Formula XIII in a suitable solvent, such as ⁇ iV-dimethylformamide (DMF), in the presence of a base such as triethylamine.
  • a suitable solvent such as ⁇ iV-dimethylformamide (DMF)
  • the reaction can be carried out at room temperature or at an elevated temperature such as 50 0 C.
  • hydroxylamine salts of the formula HN(Y-R 2 - 3 )OR 2-2 »HC1 can be obtained commercially.
  • N, O- dimethylhydroxylamine hydrochloride, methoxylamine hydrochloride, and N- methylhydroxylamine hydrochloride are commercially available compounds that can be used to make preferred compounds of Formula XIV, wherein Y is a bond.
  • Other hydroxylamine salts of the formula HN(Y-R 2-3 )OR 2-2 »HC1 can be prepared using conventional synthetic methods.
  • the product of Formula XIV, a subgenus of Formulas I and III, or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
  • Step (1) of Reaction Scheme II a compound of Formula X or a salt thereof is reacted with a carboxylic acid or an equivalent thereof to provide a compound of Formula XV.
  • Suitable equivalents to carboxylic acid include acid anhydrides of Formula 0[C(O)-X-CH 2 -O-P] 2 and acid chlorides of Formula Cl-C(O)-X-CH 2 -O-P.
  • the reaction is conveniently carried out by using the conditions described in step (1) of Reaction Scheme I for the reaction with acid chlorides.
  • Some compounds of Formula Cl-C(O)-X-O-P such as acetoxyacetyl chloride, methoxyacetyl chloride, and 2-methoxypropionyl chloride, are commercially available. Others can be prepared by known synthetic methods.
  • step (2) of Reaction Scheme II the protecting group of a l/f-imidazo[4,5- c]quinoline of Formula XV is removed to provide a hydroxyalkyl-substituted IH- imidazo[4,5-c]quinoline of Formula XVI.
  • the deprotection can be carried out using a variety of methods depending on which P group is present.
  • P is -C(O)-CH 3
  • the reaction is conveniently carried out by adding lithium hydroxide monohydrate to a solution or suspension of the compound of Formula XV in a suitable solvent or solvent system such as tetrahydrofuran:methanol:water.
  • the reaction can be carried out at room temperature, and the product can be isolated by conventional methods.
  • step (3) of Reaction Scheme II a hydroxyalkyl-substituted lH-imidazo[4,5- c]quinoline of Formula XVI is oxidized to an aldehyde-substituted lH-imidazo[4,5- c]quinoline of Formula XVII using one of many conventional methods.
  • the oxidation is conveniently carried out by adding Dess-Martin periodinane, [l,l,l-tris(acetyloxy)-l,l- dihydro-l,2-benziodoxol-3(lH)-one], to a solution or suspension of a hydroxyalkyl- substituted lH-imidazo[4,5-c]quinoline of Formula XVI in a suitable solvent such as dichloromethane.
  • the reaction can be carried out at room temperature, and the product can be isolated by conventional methods.
  • certain aldehyde-substituted lH-imidazo[4,5-c]quinolines of Formula XVII in which X is a bond can be prepared from lH-imidazo[4,5-c]quinolines with a hydrogen at the 2-position, many of which are known; see, for example, U.S. Patent Nos. 4,689,338 (Gerster) and 5,268,376 (Gerster).
  • the hydrogen at the 2-position of a lH-imidazo[4,5-c]quinoline may undergo lithiation with butyllithium, and subsequent substitution with DMF provides a compound of Formula XVII in which X is a bond.
  • step (4) of Reaction Scheme II an aldehyde-substituted lH-imidazo[4,5- c]quinoline of Formula XVII is converted to an aldoxime of Formula XVIII.
  • the reaction is conveniently carried out by adding a hydroxylamine salt of the formula NH 2 OR 2-2 » HC1, optionally in a suitable solvent such as water, to a solution or suspension of a compound of Formula XVII, in a suitable solvent, such as ethanol or methanol.
  • a base such as aqueous sodium hydroxide can be added.
  • the reaction can be carried out at room temperature or at an elevated temperature such as the reflux temperature of the solvent.
  • Hydroxylamine salts of the formula NH 2 OR 2-2 ⁇ HCl can be obtained commercially or they can be prepared using conventional synthetic methods.
  • the product or a pharmaceutically acceptable salt thereof is obtained as a mixture of E and Z isomers and can be isolated using conventional methods.
  • steps (5) and (6) of Reaction Scheme II an aldoxime-substituted IH- imidazo[4,5-c]quinoline of Formula XVIII is first oxidized to an TV-oxide of Formula XIX, which is then animated to provide a compound of Formula XX, which is a subgenus of Formulas I and III.
  • Steps (5) and (6) of Reaction Scheme II can be carried out according to the methods described in steps (2) and (3) of Reaction Scheme I, and the product can be isolated by conventional methods.
  • step (7) of Reaction Scheme II an aldoxime-substituted lH-imidazo[4,5- c]quinolin-4-amine of Formula XX is treated with a Grignard reagent of the formula R ⁇ MgHalide to form a hydroxylamine of Formula XXI 5 a subgenus of Formulas I and III.
  • a Grignard reagent of the formula R ⁇ MgHalide
  • the reaction is conveniently carried out by adding a solution of two equivalents of the Grignard reagent to a solution of the compound of Formula XX in a suitable solvent such as THF.
  • the reaction can be carried out at room temperature, and the product can be isolated using conventional methods.
  • an oxime of Formula XX can be treated with a hydride reducing agent.
  • the reduction is conveniently carried out by treating an oxime of Formula XX with excess sodium cyanoborohydride in a suitable solvent or solvent mixture such as methanol/acetic acid.
  • the reaction can be carried out at ambient temperature.
  • the product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
  • step (8) of Reaction Scheme II a hydroxylamine of Formula XXI is converted to a compound of Formula XXII, a subgenus of Formulas I and III. Step (8) is carried out using conventional methods.
  • sulfonamides of Formula XXII (Y is -S(O) 2 -) can be prepared by reacting a compound of Formula XXI with a sulfonyl chloride of formula R 2-3 S(O) 2 Cl or a sulfonic anhydride of Formula [R 2-3 S(O) 2 J 2 O.
  • the reaction can be carried out at room temperature in an inert solvent such as chloroform, dichloromethane, or ⁇ iV-dimethylacetamide (DMA) by adding the sulfonyl chloride or sulfonic anhydride to a compound of Formula XXI in the presence of a base such as N,N- diisopropylethylamine, triethylamine, or pyridine.
  • an inert solvent such as chloroform, dichloromethane, or ⁇ iV-dimethylacetamide (DMA)
  • Sulfamides of Formula XXII (Y is -S(O) 2 -N(R 8 )- or ⁇ R '° ) can be prepared by reacting a compound of Formula XXI with sulfuryl chloride to generate a sulfamoyl chloride in situ, and then reacting the sulfamoyl chloride with an amine of
  • R io are commercially available; others can be prepared using known synthetic methods.
  • Amides of Formula XXII (Y is -C(O)-) can be prepared from hydroxylamines of
  • Formula XXI using conventional methods.
  • a compound of Formula XXI can be reacted with an acid chloride of formula R 2-3 C(O)Cl.
  • the reaction can be carried out by adding the acid chloride to a solution of a compound of Formula XXI in a suitable solvent such as chloroform or DMA, optionally in the presence of a base such as N,N- diisopropylethylamine, triethylamine, or pyridine, at ambient temperature.
  • a base such as N,N- diisopropylethylamine, triethylamine, or pyridine
  • the product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
  • Ureas and thioureas of Formula XXII (Y is -C(O)-N(R 8 )-, -C(S)-N(R 8 )-,
  • -C(O)-N ⁇ — -C(O)-N(Rs)-S(O) 2 -, -C(O)-N(Rg)-C(O)-, -C(S)-N(R 8 )-C(O)-, or ⁇ R '° ) can be prepared from hydroxylamines of Formula XXI using conventional methods.
  • a compound of Formula XXI can be reacted with an isocyanate of formula
  • the reaction can be carried out by adding the isocyanate to a solution of a compound of Formula XXI in a suitable solvent such as chloroform or DMA, optionally in the presence of a base such as N,N-diisopropylethylamine, or triethylamine, at room temperature.
  • Reaction Scheme II can be modified after step (3) to introduce a R 2-4 group that is other than hydrogen.
  • an aldehyde-substituted lH-imidazo[4,5- c]quinoline of Formula XVII is treated with a Grignard reagent of the formula R 2- 4 MgHalide, which adds to the aldehyde to form a secondary alcohol.
  • a Grignard reagent of the formula R 2- 4 MgHalide
  • the reaction is conveniently carried out by adding a solution of the Grignard reagent to a solution of the compound of Formula XVII in a suitable solvent such as THF.
  • the reaction can be carried out at room temperature, and the product can be isolated using conventional methods.
  • the secondary alcohol is then oxidized to a ketone using conventional methods.
  • the reaction is conveniently carried out using Dess-Martin periodinane under the conditions described in step (3) of Reaction Scheme II.
  • the reaction may also be carried out under Swern conditions by adding the secondary alcohol followed by triethylamine to a mixture of oxalyl chloride and dimethylsulfoxide in a suitable solvent such as dichloromethane.
  • the reaction can be carried out at a sub-ambient temperature, and the product can be isolated by conventional methods.
  • Steps (4) through (8) of Reaction Scheme II can then be carried out to provide a hydroxylamine of the invention with an R 2-4 group that is other than hydrogen.
  • Step (1) of Reaction Scheme III a quinoline-3,4-diamine of Formula X is reacted with a ketal-substituted carboxylic acid or equivalent thereof of the formula , wherein D can be -OH, -Cl, Br, or a leaving group prepared using conventional hydroxy activation chemistry, such as employing iV-hydroxysuccinimide as an activating agent.
  • D can be -OH, -Cl, Br, or a leaving group prepared using conventional hydroxy activation chemistry, such as employing iV-hydroxysuccinimide as an activating agent.
  • Ketals of this formula are readily prepared from esters of formula alkyl-O-C(O)-X-C(O)-R 2-1 using conventional methods.
  • the ketone can be converted to a ketal by heating with ethylene glycol in the presence of pyridinium p-toluenesulfonate in a suitable solvent such as toluene.
  • the carboxyl group can then be activated by first hydrolyzing the ester under basic conditions, for example with sodium hydroxide in water and a lower alcohol, and then reacting with iV-hydroxysuccinimide in the presence of 4-methylmorpholine and l-(3- dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride in a suitable solvent such as dichloromethane.
  • step (1) of Reaction Scheme III can be carried out according to the methods described for reaction with acid chlorides in step (1) of Reaction Scheme I, or it can be conveniently carried out by heating a quinoline-3,4- diamine of Formula X with a ketal shown above in a suitable solvent such as pyridine.
  • the reaction can be run at the reflux temperature of the solvent, and the product of Formula XXIII can be isolated by conventional methods.
  • step (2) of Reaction Scheme III a lH-imidazo[4,5-c]quinoline of Formula XXIII is converted to the iV-oxide of Formula XXIV using the method described in step (2) of Reaction Scheme I.
  • step (3) of Reaction Scheme III the iV-oxide of Formula XXIV is aminated to afford the compound of Formula XXV using one of the methods described in step (3) of Reaction Scheme I.
  • a ketal of Formula XXV is converted to a ketone of Formula XXVI by acid-catalyzed hydrolysis.
  • the reaction is conveniently carried out by adding a strong acid, such as hydrochloric acid, to a ketal of Formula XXV.
  • the reaction may be carried out at room temperature in a suitable solvent such as water, and the product can be isolated by conventional methods.
  • step (5) of Reaction Scheme III a ketone-substituted l/f-imidazo[4,5- c]quinolin-4-amine of Formula XXVI is converted to an oxime of Formula XXVII.
  • the reaction is conveniently carried out as described in step (4) of Reaction Scheme II, and the product or a pharmaceutically acceptable salt thereof can be isolated by conventional methods.
  • Reaction Schemes I through III may be carried out using a [l,5]naphthyridine-3,4-diamine instead of a quinoline-3,4-diamine of Formula X as the starting material to prepare lH-imidazo[4,5-c] [1 ,5]naphthyridines of the invention.
  • Several [l,5]naphthyridine-3,4-diamines and their preparation are known; see, for example, U.S. Patents Nos. 6,194,425 (Gerster) and 6,518,280 (Gerster).
  • Compounds of the invention can be prepared according to Reaction Scheme IV, wherein R 2-1 , and Z are as defined above; X b is selected from the group consisting of a bond and C 1-4 alkylene; R b is selected from the group consisting of hydroxy, alkyl, alkoxy, -N(R 9 ) 2 ; n is 0 to 4; and R ⁇ is a subset of Ri as defined above that does not include those substituents that one skilled in the art would recognize as being susceptible to reduction under the acidic hydrogenation conditions of the reaction. These susceptible groups include, for example, alkenyl, alkynyl, and aryl groups and groups bearing nitro substituents.
  • Compounds of Formula XXVIII can be prepared by the oxidation and animation of a compound of Formula XVI according to steps (2) and (3) of Reaction
  • step (1) of Reaction Scheme IV a compound of Formula XXVIII is reduced to a 6,7,8,9-tetrahydro compound of Formula XXIX.
  • the reaction is conveniently carried out under hetereogeneous hydrogenation conditions by adding platinum (IV) oxide to a solution of the compound of Formula XXVIII in trifluoroacetic acid and placing the reaction under hydrogen pressure.
  • the reaction can be carried out on a Parr apparatus at room temperature.
  • the product or a pharmaceutically acceptable salt thereof can be isolated by conventional methods.
  • Steps (2) through (6) of Reaction Scheme IV can then be used to convert a compound of Formula XXIX to a compound of Formula IVb, a subgenus of Formulas I and IV.
  • Steps (2) through (6) can be carried out, for example, according to steps (3), (4), (7), and (8) of Reaction Scheme II.
  • Compounds of Formula IVb can also be made by treating a compound of Formula XXIX with thionyl chloride under conventional conditions to provide a chloroalkyl-substituted 6,7,8,9-tetrahydro compound, which can then be treated according to step (4) of Reaction Scheme I.
  • the product of Formula IVb or a pharmaceutically acceptable salt thereof can be isolated by conventional methods. 6,7,8,9-Tetrahydro-l//-imidazo[4,5-c][l ,5]naphthyridin-4-amines can also be prepared using this Reaction Scheme.
  • Compounds of the invention can be prepared according to Reaction Scheme V, wherein R, R 1 , R 2-1 , X, and Z are as defined above; n is 0 or 1 ; hal is -Br or -I; and R 3a and R 3b are as defined below.
  • Compounds of Formula XXX, a subgenus of Formulas I and III can be prepared according to the methods described in Reaction Scheme I, II, or III beginning with a compound of Formula X, wherein one of the R groups is -Br, or -I.
  • These halogen-substituted quinolines are known or can be prepared by known methods; see, for example, U.S. Patent Application Publication No.
  • step (1) of Reaction Scheme V a halogen-substituted lH-imidazo[4,5- c]quinolin-4-amine of Formula XXX can undergo known palladium-catalyzed coupling reactions such as the Suzuki coupling and the Heck reaction.
  • a halogen- substituted compound of Formula XXX undergoes Suzuki coupling with a boronic acid of Formula R 3a -B(OH) 2 , an anhydride thereof, or a boronic acid ester of Formula R 3a -B(O-alkyl) 2 , wherein R 3a is -R 4 ⁇ -XVJU, -XVY'-JU, or -XVR 5 ; where X' a is alkenylene; X' b is arylene, heteroarylene, and alkenylene interrupted or terminated by arylene or heteroarylene; R 4b is aryl or heteroaryl where the aryl or heteroaryl groups can be unsubstituted or substituted as defined in R 4 above; and R 4 , R 5 , and Y' are as defined above.
  • the Suzuki coupling is conveniently carried out by combining a compound of Formula XXX with a boronic acid or an ester or anhydride thereof in the presence of palladium (II) acetate, triphenylphosphine, and a base such as sodium carbonate in a suitable solvent such as n-propanol or solvent mixture such as rc-propanol/water.
  • the reaction can be carried out at an elevated temperature (e.g., 80-100 0 C).
  • Many boronic acids of Formula R 3a -B(OH) 2 anhydrides thereof, and boronic acid esters of Formula
  • R 3a -B(O-alkyl) 2 are commercially available; others can be readily prepared using known synthetic methods. See, for example, Li, W. et al, J. Org. Chem., 67, 5394-5397 (2002).
  • the product of Formula IHb 5 a subgenus of Formulas I and III, or a pharmaceutically acceptable salt thereof can be isolated by conventional methods.
  • the Heck reaction can also be used in step (1) of Reaction Scheme V to provide compounds of Formula HIb 5 wherein R 3a is -X' a -R 4b or -X' a -Y'-R 4 , wherein X' a , Y', R 4 ⁇ and R 4 are as defined above.
  • Several of these vinyl-substituted compounds are commercially available; others can be prepared by known methods.
  • the reaction is conveniently carried out by combining the compound of Formula XXX and the vinyl-substituted compound in the presence of palladium (II) acetate, triphenylphosphine or tri- ⁇ rt/z ⁇ -tolylphosphine, and a base such as triethylamine in a suitable solvent such as acetonitrile or toluene.
  • the reaction can be carried out at an elevated temperature such as 100 °C -120 °C under an inert atmosphere.
  • the product of Formula IHb or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
  • the reduction can be carried out by hydrogenation using a conventional heterogeneous hydrogenation catalyst such as palladium on carbon.
  • a conventional heterogeneous hydrogenation catalyst such as palladium on carbon.
  • the reaction can conveniently be carried out on a Parr apparatus in a suitable solvent such as ethanol, methanol, or mixtures thereof.
  • a suitable solvent such as ethanol, methanol, or mixtures thereof.
  • the product of Formula IHc, a subgenus of Formulas I and III, or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
  • compounds of the invention are prepared according to Reaction Scheme VI, where R 1 , R 2-1 , R 2-2 , RAI, RBI, and X are as defined above, and Z 3 is -C(R 2-4 )(-N(-OR 2-2 )- Y-R 2-3 )- and Ph is phenyl.
  • Steps (1) through (4) of Reaction Scheme VI can be carried out as described in steps (1) through (4) of Reaction Scheme II starting with a compound of Formula XXXI.
  • Many tetrazolo[l ,5- ⁇ ]pyridines of Formula XXXI are known; others can be prepared by known methods. See, for example, PCT Publication Nos. WO 2004/110991 (Lindstrom et al), WO 2004/110992 (Lindstrom et al.), and U.S. Patent No. 6,797,718 (Dellaria et al.).
  • step (5) of Reaction Scheme VI the tetrazolo ring is removed from a 7H- imidazo[4,5-c]tetrazolo[l,5- ⁇ ]pyridine of Formula XXXII by reaction with triphenylphosphine to form an iV-triphenylphosphinyl intermediate of Formula XXXIII.
  • the reaction with triphenylphosphine can be run in a suitable solvent such as toluene or 1,2-dichlorobenzene under an atmosphere of nitrogen with heating, for example at the reflux temperature.
  • an iV-triphenylphosphinyl intermediate of Formula XXXIII is hydrolyzed to provide an oxime-substituted lH-imidazo[4,5-c]pyridin- 4-amine of Formula XXXIV, a subgenus of Formulas I and II.
  • the hydrolysis can be carried out by general methods well known to those skilled in the art, for example, by heating in a lower alkanol or an alkanol/water solution in the presence of an acid such as trifluoroacetic acid, acetic acid, or hydrochloric acid.
  • the product can be isolated from the reaction mixture using conventional methods as the compound of Formula XXXIV or as a pharmaceutically acceptable salt thereof.
  • steps (7) and (8) of Reaction Scheme II may be used to convert a compound of Formula XXXIV to a compound of Formula lib using steps (7) and (8) of Reaction Scheme VI.
  • the product or a pharmaceutically acceptable salt thereof can be isolated by conventional methods.
  • R 1 , R 2-1 , R 2-2 , R, X, and Z a are as defined above;
  • E is carbon (imidazoquinoline ring) or nitrogen (imidazonaphthyridine ring); n is 0 or 1; Bn is benzyl; and
  • R 3c is -0-R 4 , -O-X'-R 4 , -O-X'-Y'-R ⁇ -O-X'-Y'-X'-Y'-R ⁇ or -O-X'-R 5 , where R 4 , X', Y', and R 5 are as defined above.
  • an aniline or aminopyridine of Formula XXXV is treated with the condensation product generated from 2,2-dimethyl-l,3- dioxane-4,6-dione (Meldrum's acid) and triethyl orthoformate to provide an imine of Formula XXXVI.
  • the reaction is conveniently carried out by adding a solution of an aniline or aminopyridine of Formula XXXV to a heated mixture of Meldrum's acid and triethyl orthoformate and heating the reaction at an elevated temperature.
  • the product can be isolated using conventional methods.
  • Many anilines and aminopyridines of Formula XXXV are commercially available; others can be prepared by known synthetic methods.
  • benzyloxypyridines of Formula XXXV can be prepared using the method of Holladay et al., Biorg. Med. Chem. Lett, 8, pp. 2797-2802, (1998).
  • step (2) of Reaction Scheme VII an imine of Formula XXXVI undergoes thermolysis and cyclization to provide a compound of Formula XXXVII.
  • the reaction is conveniently carried out in a medium such as DOWTHERM A heat transfer fluid at a temperature in the range of 200 to 250 0 C.
  • the product can be isolated using conventional methods.
  • Isomers of the compound of Formula XXXV or Formula XXXVII, wherein E is nitrogen and at a different position in the ring can also be synthesized and can be used to prepare compounds of the invention.
  • step (3) of Reaction Scheme VII a compound of Formula XXXVII is nitrated under conventional nitration conditions to provide a compound of Formula XXXVIII.
  • the reaction is conveniently carried out by adding nitric acid to the compound of Formula XXXVII in a suitable solvent such as propionic acid and heating the mixture at an elevated temperature.
  • the product can be isolated using conventional methods.
  • a 3-nitro[l,5]naphthyridin-4-ol or 3- nitroquinolin-4-ol of Formula XXXVIII is chlorinated using conventional chlorination chemistry to provide a 4-chloro-3-nitro[l,5]naphthyridine or 4-chloro-3-nitroquinoline of Formula XXXIX.
  • the reaction is conveniently carried out by treating the compound of Formula XXXVIII with phosphorous oxy chloride in a suitable solvent such as DMF.
  • the reaction can be carried out at ambient temperature or at an elevated temperature such as 100 °C, and the product can be isolated using conventional methods.
  • step (5) of Reaction Scheme VII a 4-chloro-3-nitro[l,5]naphthyridine or 4- chloro-3-nitroquinoline of Formula XXXIX is treated with an amine of Formula R 1 -NH 2 to provide a compound of Formula XL.
  • amines of Formula R 1 -NH 2 are commercially available; others can be prepared by known synthetic methods.
  • the reaction is conveniently carried out by adding the amine of Formula R 1 -NH 2 to a solution of the 4- chloro-3-nitro[l,5]naphthyridine or 4-chloro-3-nitroquinoline of Formula XXXIX in a suitable solvent such as dichloromethane in the presence of a tertiary amine such as triethylamine.
  • a suitable solvent such as dichloromethane
  • the reaction can be carried out at ambient temperature or at a sub-ambient temperature such as, for example, 0 0 C.
  • the reaction product can be isolated using conventional methods.
  • a compound of Formula XL is reduced to provide a diamine of Formula XLI.
  • the reaction can be carried out by hydrogenation using a heterogeneous hydrogenation catalyst such as platinum on carbon.
  • the hydrogenation is conveniently carried out in a Parr apparatus in a suitable solvent such as toluene, methanol, acetonitrile, or ethyl acetate.
  • the reaction can be carried out at ambient temperature, and the product can be isolated using conventional methods.
  • the reduction in step (6) can be carried out using nickel boride, prepared in situ from sodium borohydride and nickel(II) chloride.
  • the reduction is conveniently carried out by adding a solution of a compound of Formula XL in a suitable solvent or solvent mixture such as dichloromethane/methanol to a mixture of excess sodium borohydride and catalytic nickel(II) chloride in methanol.
  • the reaction can be carried out at ambient temperature.
  • the product can be isolated using conventional methods.
  • Steps (7) through (12) of Reaction Scheme VII are analogous to steps (1) through
  • step (13) of Reaction Scheme VII the benzyl group in an oxime of Formula XLII is cleaved to provide a hydroxy group.
  • the cleavage is conveniently carried out on a Parr apparatus under hydrogenolysis conditions using a suitable heterogeneous catalyst such as palladium or platinum on carbon in a solvent such as ethanol.
  • the cleavage can be carried out with an acid such as hydrogen bromide in a suitable solvent such as acetic acid at an elevated temperature, such as 65 0 C.
  • the product of Formula XLIII, prepared by any of these methods, or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
  • step (14) of Reaction Scheme VII a hydroxy-substituted oxime of Formula
  • XLIII is converted to a compound of Formula XLIV, a subgenus of Formula I, using a Williamson-type ether synthesis.
  • the reaction is effected by treating a hydroxy- substituted compound of Formula XLIII with an aryl, alkyl, or arylalkylenyl halide of Formula Halide-Rn,, Halide-alkylene-Rj, Halide-alkylene-Y'-R-t, or Halide-alkylene-Rs, where ILj b is as defined above, in the presence of a base.
  • alkyl, arylalkylenyl, and aryl halides of these formulas are commercially available, including substituted benzyl bromides and chlorides, substituted or unsubstituted alkyl or arylalkylenyl bromides and chlorides, and substituted fluorobenzenes.
  • Other halides of these formulas can be prepared using conventional synthetic methods. The reaction is conveniently carried out by combining an alkyl, arylalkylenyl, or aryl halide with the hydroxy-substituted compound of Formula XLIII in a solvent such as DMF in the presence of a suitable base such as cesium carbonate.
  • catalytic tetrabutylammonium bromide can be added.
  • the reaction can be carried out at ambient temperature or at an elevated temperature, for example 65 0 C or 85 °C, depending on the reactivity of the halide reagent.
  • step (14) may be carried out using the Ullmann ether synthesis, in which an alkali metal aryloxide prepared from the hydroxy-substituted compound of Formula XLIII reacts with an aryl halide in the presence of copper salts, to provide a compound of Formula XLIV, where R 3b is -0-R 41 ,, -0-XV R 4 , or -O-XVY'-R4, wherein X' f is an arylene or heteroarylene, and R ⁇ , is as defined above.
  • Numerous substituted and unsubstituted aryl halides are commercially available; others can be prepared using conventional methods.
  • the product of Formula XLIV, prepared by either of these methods, or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
  • steps (7) and (8) of Reaction Scheme II may be used to convert a compound of Formula XLIV to a compound of Formula XLV using steps (15) and (16) of Reaction Scheme VII.
  • the product or pharmaceutically acceptable salt thereof can be isolated by conventional methods.
  • naphthyridines of the invention are prepared from tetrazolo compounds of Formulas XLVI and L according to Reaction Schemes VIII and IX, wherein Ri, R 2-1 , R 2-2 , R, n, Z a , and X are as defined above.
  • Compounds of Formula XLVI and L and synthetic routes to these compounds are known; see, for example, U.S. Patent No. 6, 194,425 (Gerster).
  • Steps (1) through (4) of Reaction Schemes VIII and IX are analogous to steps (1) through (4) of Reaction Scheme II and can be carried out using the same methods.
  • the tetrazolo group of a compound of Formula XLVII or LI can then be removed in step (5) of Reaction Scheme IX or X to provide a lH-imidazo[4,5-c]naphthyridin-4- amine of Formula XLVIII or LII, each of which is a subgenus of Formula I.
  • the removal of the tetrazolo group can be carried out as described in steps (5) and (6) of Reaction Scheme VI or by using methods described in U.S. Patent No. 6,194,425 (Gerster).
  • the product or a pharmaceutically acceptable salt thereof can be isolated by conventional methods.
  • steps (7) and (8) of Reaction Scheme II may be used to convert a compound of Formula XLVIII or LII to a compound of Formula XLIX or LIII using steps (6) and (7) of Reaction Scheme VIII or IX, respectively.
  • the product of Formula XLIX or LIII, each of which is a subgenus of Formula I, or a pharmaceutically acceptable salt thereof can be isolated by conventional methods.
  • step (1) of Reaction Scheme X a 2,4-dichloro-3-nitropyridine of Formula LIV is reacted with an amine of formula R 1 -NH 2 to provide a 2-chloro-3-nitropyridin-4-amine of Formula LV.
  • the reaction can be carried out using the method described in step (5) of Reaction Scheme VII.
  • Some 2,4-dichloro-3-nitropyridines of Formula LIV are known; others can be prepared using known synthetic methods. See, for example, U.S. Patent No. 6,525,064 (Dellaria) and the references cited therein.
  • step (2) of Reaction Scheme X a 2-chloro-3-nitropyridin-4-amine of Formula
  • LV is reduced to provide a 2-chloropyridine-3,4-diamine of Formula LVI.
  • the reduction can be carried out using the methods described in step (6) of Reaction Scheme VII.
  • step (3) of Reaction Scheme X a 2-chloropyridine-3,4-diamine of Formula LVI is reacted with a carboxylic acid or an equivalent thereof to provide a 4-chloro-lH- imidazo[4,5-c]pyridine of Formula LVII.
  • the reaction can be carried out using the method described in step (1) of Reaction Scheme II.
  • step (4) of Reaction Scheme X the protecting group of a 4-chloro-lH- imidazo[4,5-c]pyridine of Formula LVII is removed to provide a hydroxyalkyl-substituted 4-chloro-lH-imidazo[4,5-c]pyridine of Formula LVIII.
  • the deprotection can be carried out using a variety of methods depending on which P group is present.
  • P is an ethyl group
  • the reaction can be carried out by adding a solution of boron tribromide in a suitable solvent to a solution or suspension of a compound of Formula LVII in a suitable solvent such as dichloromethane.
  • the reaction can be carried out at a sub-ambient temperature such as 0 0 C.
  • step (5) of Reaction Scheme X a 4-chloro ⁇ lH-imidazo[4,5-c]pyridine of
  • Formula LVIII is reacted with 4-methoxybenzylamine to provide an N-(4- methxoybenzyl)-lH-imidazo[4,5-c]pyridin-4-amine of Formula LIX.
  • the reaction can be carried out by combining a compound of Formula LVIII with excess iV-(4- methxoybenzyl)amine and excess pyridine hydrochloride in a suitable solvent such as 2,2,2-trifluoroethanol and heating (150 °C) in a microwave reactor.
  • step (6) of Reaction Scheme X the 4-methoxybenzyl group is removed from an jV-(4-methxoybenzyl)-lH-imidazo[4,5-c]pyridin-4-amine of Formula LIX to provide a lH-imidazo[4,5-c]pyridin-4-amine of Formula LX.
  • the reaction can be carried out by treating a compound of Formula LIX with trifluoroacetic acid at ambient temperature.
  • a hydroxyalkyl-substituted lH-imidazo[4,5- c]pyridin-4-amine of Formula LX is chlorinated to provide a chloroalkyl-substituted IH- imidazo[4,5-c]pyridin-4-amine of Formula LXI.
  • the reaction can be carried out by treating a solution of a compound of Formula LX in a suitable solvent such as chloroform with thionyl chloride.
  • the reaction can be carried out at an elevated temperature such as the reflux temperature of the solvent.
  • step (8) of Reaction Scheme X 5 the chloro group of a chloroalkyl-substituted lH-imidazo[4,5-c]pyridin-4-amine of Formula LXI is displaced with a hydroxy lamine of formula HN(Y-R 2-3 )OR 2-2 or a salt thereof to provide a lH-imidazo[4,5-c]pyridin-4-amine of Formula LXII, which is a subgenus of Formulas I and II.
  • the reaction can be carried out using the methods described in step (4) of Reaction Scheme I.
  • step (8a) of Reaction Scheme X 5 the chloro group of a chloroalkyl-substituted lH-imidazo[4,5 -c]pyridin-4-amine of Formula LXI is displaced with a hydroxylamine of formula H 2 NOR 2-2 or a salt thereof to provide a lH-imidazo[4,5-c]pyridin-4-amine of Formula LXIII, which is a subgenus of Formulas I and II.
  • the reaction can be carried out using the methods described in step (4) of Reaction Scheme I.
  • step (9) of Reaction Scheme X 5 a lH-imidazo[4 5 5-c]pyridin-4-amine of Formula LXIII is further derivatized to provide a lH-imidazo[4 5 5-c]pyridin-4-amine of Formula
  • LXII 5 which is a subgenus of Formulas I and II.
  • the reaction can be carried out using the methods described in step (8) of Reaction Scheme II.
  • compounds of the invention can be prepared according to Reaction Scheme XI, wherein RA2, RB2, RI 5 R2-i, X 5 Z, and G are as defined above.
  • Compounds of Formula Ia can be prepared according to the methods described above.
  • the amino group of a compound of Formula Ia can be converted by conventional methods to a functional group such as an amide, carbamate, urea, amidine, or another hydrolyzable group.
  • Particularly useful compounds of Formula VII are amides derived from carboxylic acids containing one to ten carbon atoms, amides derived from amino acids, and carbamates containing one to ten carbon atoms.
  • the reaction can be carried out, for example, by combining a compound of Formula Ia with a chloroformate or acid chloride, such as ethyl chloroformate or acetyl chloride, in the presence of a base such as triethylamine in a suitable solvent such as dichloromethane at room temperature.
  • compositions and Biological Activity contain a therapeutically effective amount of a compound or salt described above in combination with a pharmaceutically acceptable carrier.
  • a therapeutically effective amount and “effective amount” mean an amount of the compound or salt sufficient to induce a therapeutic or prophylactic effect, such as cytokine induction, immunoniodulation, antitumor activity, and/or antiviral activity.
  • a therapeutic or prophylactic effect such as cytokine induction, immunoniodulation, antitumor activity, and/or antiviral activity.
  • the exact amount of compound or salt used in a pharmaceutical composition of the invention will vary according to factors known to those of skill in the art, such as the physical and chemical nature of the compound or salt, the nature of the carrier, and the intended dosing regimen.
  • compositions of the invention will contain sufficient active ingredient or prodrug to provide a dose of about 100 nanograms per kilogram (ng/kg) to about 50 milligrams per kilogram (mg/kg), preferably about 10 micrograms per kilogram ( ⁇ g/kg) to about 5 mg/kg, of the compound or salt to the subject.
  • the method includes administering sufficient compound to provide a dose of from about 0.1 mg/m 2 to about 2.0 mg/ m 2 to the subject, for example, a dose of from about 0.4 mg/m 2 to about 1.2 mg/m 2 .
  • dosage forms such as tablets, lozenges, capsules, parenteral formulations, syrups, creams, ointments, aerosol formulations, transdermal patches, transmucosal patches and the like.
  • These dosage forms can be prepared with conventional pharmaceutically acceptable carriers and additives using conventional methods, which generally include the step of bringing the active ingredient into association with the carrier.
  • the compounds or salts of the invention can be administered as the single therapeutic agent in the treatment regimen, or the compounds or salts described herein may be administered in combination with one another or with other active agents, including additional immune response modifiers, antivirals, antibiotics, antibodies, proteins, peptides, oligonucleotides, etc.
  • Cytokines whose production may be induced by the administration of compounds or salts of the invention generally include interferon- ⁇ (IFN- ⁇ ) and tumor necrosis factor- ⁇ (TNF- ⁇ ) as well as certain interleukins (IL). Cytokines whose biosynthesis may be induced by compounds or salts of the invention include IFN- ⁇ , TNF- ⁇ , IL-I, IL-6, IL-IO and IL- 12, and a variety of other cytokines. Among other effects, these and other cytokines can inhibit virus production and tumor cell growth, making the compounds or salts useful in the treatment of viral diseases and neoplastic diseases. Accordingly, the invention provides a method of inducing cytokine biosynthesis in an animal comprising administering an effective amount of a compound or salt of the invention to the animal.
  • the animal to which the compound or salt is administered for induction of cytokine biosynthesis may have a disease as described infra, for example a viral disease or a neoplastic disease, and administration of the compound or salt may provide therapeutic treatment.
  • the compound or salt may be administered to the animal prior to the animal acquiring the disease so that administration of the compound or salt may provide a prophylactic treatment.
  • compounds or salts described herein can affect other aspects of the innate immune response. For example, natural killer cell activity may be stimulated, an effect that may be due to cytokine induction.
  • the compounds or salts may also activate macrophages, which in turn stimulate secretion of nitric oxide and the production of additional cytokines. Further, the compounds or salts may cause proliferation and differentiation of B-lymphocytes.
  • T helper type 1 cytokine IFN- ⁇
  • T helper type 2 cytokines IL- 4, IL-5 and IL- 13
  • the compound or salt or composition may be administered alone or in combination with one or more active components as in, for example, a vaccine adjuvant.
  • the compound or salt or composition and other component or components may be administered separately; together but independently such as in a solution; or together and associated with one another such as (a) covalently linked or (b) non-covalently associated, e.g., in a colloidal suspension.
  • Conditions for which compounds or salts or compositions identified herein may be used as treatments include, but are not limited to:
  • viral diseases such as, for example, diseases resulting from infection by an adenovirus, a herpesvirus (e.g., HSV-I, HSV-II, CMV, or VZV), a poxvirus (e.g., an orthopoxvirus such as variola or vaccinia, or molluscum contagiosum), a picornavirus (e.g., rhinovirus or enterovirus), an orthomyxovirus (e.g., influenzavirus), a paramyxovirus (e.g., parainfluenzavirus, mumps virus, measles virus, and respiratory syncytial virus (RSV)), a coronavirus (e.g., SARS) 5 a papovavirus (e.g., papillomaviruses, such as those that cause genital warts, common warts, or plantar warts), a hepadnavirus (e.g., hepatitis B virus),
  • bacterial diseases such as, for example, diseases resulting from infection by bacteria of, for example, the genus Escherichia, Enterobacter, Salmonella, Staphylococcus, Shigella, Listeria, Aerobacter, Helicobacter, Klebsiella, Proteus, Pseudomonas, Streptococcus, Chlamydia, Mycoplasma, Pneumococcus, Neisseria, Clostridium, Bacillus, Corynebacterium, Mycobacterium, Campylobacter, Vibrio, Serratia, Providencia, Chromobacterium, Brucella, Yersinia, Haemophilus, or Bordetella; (c) other infectious diseases, such as chlamydia, fungal diseases including but not limited to candidiasis, aspergillosis, histoplasmosis, cryptococcal meningitis, or parasitic diseases including but not limited to malaria, Pneumocystis
  • atopic diseases such as atopic dermatitis or eczema, eosinophilia, asthma, allergy, allergic rhinitis, and Ommen's syndrome;
  • autoimmune diseases such as systemic lupus erythematosus, essential thrombocythaemia, multiple sclerosis, discoid lupus, alopecia areata; and (g) diseases associated with wound repair such as, for example, inhibition of keloid formation and other types of scarring (e.g., enhancing wound healing, including chronic wounds).
  • a compound or salt identified herein may be useful as a vaccine adjuvant for use in conjunction with any material that raises either humoral and/or cell mediated immune response, such as, for example, live viral, bacterial, or parasitic immunogens; inactivated viral, tumor-derived, protozoal, organism-derived, fungal, or bacterial immunogens; toxoids; toxins; self-antigens; polysaccharides; proteins; glycoproteins; peptides; cellular vaccines; DNA vaccines; autologous vaccines; recombinant proteins; and the like, for use in connection with, for example, BCG, cholera, plague, typhoid, hepatitis A, hepatitis B, hepatitis C, influenza A, influenza B, parainfluenza, polio, rabies, measles, mumps, rubella, yellow fever, tetanus, diphtheria, hemophilus influenza b, tuberculosis, meningo
  • Compounds or salts identified herein may be particularly helpful in individuals having compromised immune function.
  • compounds or salts may be used for treating the opportunistic infections and tumors that occur after suppression of cell mediated immunity in, for example, transplant patients, cancer patients and HIV patients.
  • one or more of the above diseases or types of diseases for example, a viral disease or a neoplastic disease may be treated in an animal in need thereof (having the disease) by administering a therapeutically effective amount of a compound or salt of the invention to the animal.
  • An animal may also be vaccinated by administering an effective amount of a compound or salt described herein, as a vaccine adjuvant.
  • a method of vaccinating an animal comprising administering an effective amount of a compound or salt described herein to the animal as a vaccine adjuvant.
  • An amount of a compound or salt effective to induce cytokine biosynthesis is an amount sufficient to cause one or more cell types, such as monocytes, macrophages, dendritic cells and B-cells to produce an amount of one or more cytokines such as, for example, IFN- ⁇ , TNF- ⁇ , IL-I, IL-6, IL-IO and IL- 12 that is increased (induced) over a background level of such cytokines.
  • the precise amount will vary according to factors known in the art but is expected to be a dose of about 100 ng/kg to about 50 mg/kg, preferably about 10 ⁇ g/kg to about 5 mg/kg.
  • the amount is expected to be a dose of, for example, from about 0.01 mg/m 2 to about 5.0 mg/m 2 , (computed according to the Dubois method as described above) although in some embodiments the induction or inhibition of cytokine biosynthesis may be performed by administering a compound or salt in a dose outside this range.
  • the method includes administering sufficient compound or salt or composition to provide a dose of from about 0.1 mg/m 2 to about 2.0 mg/ m 2 to the subject, for example, a dose of from about 0.4 mg/m 2 to about 1.2 mg/m 2 .
  • the invention also provides a method of treating a viral infection in an animal and a method of treating a neoplastic disease in an animal comprising administering an effective amount of a compound or salt of the invention to the animal.
  • An amount effective to treat or inhibit a viral infection is an amount that will cause a reduction in one or more of the manifestations of viral infection, such as viral lesions, viral load, rate of virus production, and mortality as compared to untreated control animals.
  • the precise amount that is effective for such treatment will vary according to factors known in the art but is expected to be a dose of about 100 ng/kg to about 50 mg/kg, preferably about 10 ⁇ g/kg to about 5 mg/kg.
  • An amount of a compound or salt effective to treat a neoplastic condition is an amount that will cause a reduction in tumor size or in the number of tumor foci. Again, the precise amount will vary according to factors known in the art but is expected to be a dose of about 100 ng/kg to about 50 mg/kg, preferably about 10 ⁇ g/kg to about 5 mg/kg. In other embodiments, the amount is expected to be a dose of, for example, from about 0.01 mg/m to about 5.0 mg/m , (computed according to the Dubois method as described above) although in some embodiments either of these methods may be performed by administering a compound or salt in a dose outside this range.
  • the method includes administering sufficient compound or salt to provide a dose of from about 0.1 mg/m 2 to about 2.0 mg/ m 2 to the subject, for example, a dose of from about 0.4 mg/m 2 to about 1.2 mg/m 2 .
  • Each portion was purified by column chromatography using a HORIZON HPFC system (an automated, modular high-performance flash purification product available from Biotage, Inc, Charlottesville, Virginia, USA) using a FLASH 651 silica cartridge (also available from Biotage, Inc.) (eluting with ethyl acetate methanol in a gradient from 98:2 to 85:15) to provide 11.24 g of 2-chloromethyl-l-(2-methylpropyl)-lH-imidazo[4,5- c]quinolin-4-amine as a tan solid.
  • HORIZON HPFC system an automated, modular high-performance flash purification product available from Biotage, Inc, Charlottesville, Virginia, USA
  • FLASH 651 silica cartridge also available from Biotage, Inc.
  • FractionLynx automated purification system The prep HPLC fractions were analyzed using a Waters LC/TOF-MS, and the appropriate fractions were centrifuge evaporated to provide the trifluoroacetate salt of the desired compound. Reversed phase prep HPLC was performed with non-linear gradient elution from 5-95% B where A is 0.05% trifluoroacetic acid/water and B is 0.05% trifluoroacetic acid/acetonitrile. Fractions were collected by mass-selective triggering.
  • Methoxylamine hydrochloride (145 mg, 1.73 mmol) was added to a solution of 2- chloromethyl-l-(2-methylpropyl)-lH-imidazo[4,5-c]quinolin-4-amine (0.250 g, 0.866 mmol) in DMF (3 mL). A precipitate formed. Triethylamine (0.263 g, 2.60 mmol) was added, and the reaction was heated with stirring overnight at 50 0 C, allowed to cool to ambient temperature, and partitioned between ethyl acetate (5 mL) and water (5 mL).
  • Example 2 The method described in Example 1 was followed using iV-methylhydroxylamine hydrochloride (0.058 g, 0.69 mmol) in lieu of ⁇ Odimethylhydroxylamine hydrochloride.
  • the product was purified by prep HPLC as described in Example 1 to provide 2- ⁇ [hydroxy(methyl)amino]methyl ⁇ - 1 -(2-methylpropyl)- 1 H-imidazo [4,5 -c]quinolin-4- amine trifluoroacetate.
  • HRMS (ESI) m/z 300.1826 (M+H).
  • Methoxylamine hydrochloride (0.659 g, 7.90 mmol) was added to a stirred suspension of l-(2-methylpropyl)-lH-imidazo[4,5-c]quinoline-2-carbaldehyde (1.00 g, 3.95 mmol) in methanol (10 mL), and the reaction was stirred at room temperature overnight. The methanol was removed under reduced pressure, and the residue was diluted with saturated aqueous sodium bicarbonate (50 mL).
  • Part C mCPBA (1.75 g of 11% pure material, 7.79 mmol) was added in portions over a period of five minutes to a solution of l-(2-methylpropyl)-l/f-imidazo[4,5-c]quinoline-2- carbaldehyde O-methyloxime (1.1 g, 3.9 mmol) in chloroform (40 mL), and the reaction was stirred at room temperature for one hour.
  • Ammonium hydroxide (20 mL) was added, and the resulting mixture was stirred for five minutes before the addition of p- toluenesulfonyl chloride (0.891 g, 4.68 mmol) in portions.
  • the reaction mixture was stirred at room temperature for 1.5 hours.
  • Part E mCPBA (2.2 g of 60% pure material, 7.7 mmol) was added in portions over a period of five minutes to a stirred solution of 2-methyl-l- ⁇ 2-[2-(2-methyl-l,3-dioxolan-2- yl)ethyl]-lH-imidazo[4,5-c]quinolin-l-yl ⁇ propan-2-ol (2.5 g, 7.0 mmol) in chloroform (47 mL), and the reaction was stirred at room temperature for 20 minutes. The reaction mixture was partitioned between dichloromethane (200 mL) and saturated aqueous sodium carbonate (100 mL). The organic layer was separated and washed with saturated aqueous sodium carbonate (100 mL).
  • Methoxylamine hydrochloride (0.26 g, 3.1 mmol) was added to a stirred solution of 4-[4-amino-l-(2-hydroxy-2-methylpropyl)-l/f-imidazo[4,5-c]quinolin-2-yl]butan-2-one (0.600 g, 1.84 mmol) in pyridine (9 mL), and the reaction was stirred at room temperature for 45 minutes. Water (50 mL) was added. The aqueous layer was separated, extracted with dichloromethane (2 x 50 mL), adjusted to p ⁇ 10 with the addition of saturated aqueous sodium carbonate, and extracted with dichloromethane (2 x 25 rnL).
  • a 2L glass parr vessel was charged with of 7-(benzyloxy)-3-nitro-iV-(tetrahydro- 2H-pyran-4-ylmethyl)quinolin-4-amine (59.34 g, 0.151 mol), platinum on carbon (5%, 6.6 g) and acetonitrile (600 mL) to provide a black mixture.
  • the vessel was placed on a shaker and pressurized with hydrogen gas ( ⁇ 50 psi, 3.4 X 10 5 Pa). After shaking for 18 hours at ambient temperature, the mixture was filtered through CELITE filter agent, and the filter cake washed with acetonitrile.
  • the aqueous layer was extracted with another portion of dichloromethane (50 mL).
  • the combined organic layers were dried over sodium sulfate, filtered and concentrated under reduced pressure.
  • the crude material was purified by column chromatography using a HORIZON HPFC system equipped with a FLASH 40+M silica cartridge eluting with dichloromethane :methanol in a gradient from 100:0 to 90:10.
  • the aqueous layer was extracted with another portion of dichloromethane (30 mL).
  • the combined organic layers were dried over sodium sulfate, filtered and concentrated under reduced pressure.
  • the crude material was purified by column chromatography using a HORIZON HPFC system equipped with a FLASH 40+M silica cartridge eluting with dichloromethane methanol in a gradient from 100:0 to 90:10.
  • Triethylamine (0.747 g, 1.03 mL, 7.38 mmol) and N,O-dimethylhydroxylamine hydrochloride (0.480 g, 4.92 mmol) were added to a stirring suspension of 2- chloromethyl-l-(2-hydroxy-2-methylpropyl)-lH-imidazo[4,5-c]quinolin-4-amine (0.750 g, 2.46 mmol) in DMF (5 mL).
  • the resulting suspension was heated to 50 0 C and stirred for 17 hours.
  • the reaction mixture was cooled to room temperature and poured into water (100 mL). A solid was removed by filtration and discarded.
  • the filtrate was extracted with ethyl acetate (3 x 100 mL).
  • Certain exemplary compounds including some of those described above in the Examples, have the following Formulas (Ha, Ilia, IVa, or Va) and the following R 1 and R 2 substituents, wherein each line of the table is matched with Formula Ha, Ilia, IVa, or Va to represent a specific embodiment of the invention.
  • Certain exemplary compounds including some of those described above in the Examples, have the following Formulas (Ha, Ilia, IVa, or Va) and the following R 1 and R 2 substituents, wherein each line of the table is matched with Formula Ha, Ilia, IVa, or Va to represent a specific embodiment of the invention.
  • Certain exemplary compounds including some of those described above in the Examples, have the following Formulas (HId, or Vd) and the following R 1 and R 2 substituents, wherein each line of the table is matched with Formula IHd or Vd to represent a specific embodiment of the invention.
  • Compounds of the invention have been found to modulate cytokine biosynthesis by inducing the production of interferon ⁇ and/or tumor necrosis factor ⁇ in human cells when tested using one of the methods described below.
  • cytokine induction An in vitro human blood cell system is used to assess cytokine induction. Activity is based on the measurement of interferon ( ⁇ ) and tumor necrosis factor ( ⁇ ) (IFN- ⁇ and TNF- ⁇ , respectively) secreted into culture media as described by Testerman et al. in “Cytokine Induction by the Immunomodulators Imiquimod and S-27609,” Journal of Leukocyte Biology, 58, 365-372 (September, 1995).
  • ⁇ interferon
  • ⁇ tumor necrosis factor
  • PBMC Peripheral blood mononuclear cells
  • HISTOPAQUE- 1077 Sigma, St. Louis, MO
  • Ficoll-Paque Plus Amersham Biosciences Piscataway, NJ
  • Blood is diluted 1 :1 with Dulbecco's Phosphate Buffered Saline (DPBS) or Hank's Balanced Salts Solution (HBSS).
  • DPBS Dulbecco's Phosphate Buffered Saline
  • HBSS Hank's Balanced Salts Solution
  • PBMC whole blood is placed in Accuspin (Sigma) or LeucoSep (Greiner Bio-One, Inc., Longwood, FL) centrifuge frit tubes containing density gradient medium.
  • the PBMC layer is collected and washed twice with DPBS or HBSS and re-suspended at 4 x 10 6 cells/mL in RPMI complete.
  • the PBMC suspension is added to 96 well flat bottom sterile tissue culture plates containing an equal volume of RPMI complete media containing test compound.
  • the compounds are solubilized in dimethyl sulfoxide (DMSO).
  • DMSO concentration should not exceed a final concentration of 1% for addition to the culture wells.
  • the compounds are generally tested at concentrations ranging from 30-0.014 ⁇ M. Controls include cell samples with media only, cell samples with DMSO only (no compound), and cell samples with reference compound.
  • test compound is added at 60 ⁇ M to the first well containing RPMI complete and serial 3 fold dilutions are made in the wells.
  • the PBMC suspension is then added to the wells in an equal volume, bringing the test compound concentrations to the desired range (usually 30-0.014 ⁇ M).
  • the final concentration of PBMC suspension is 2 x 10 6 cells/mL.
  • the plates are covered with sterile plastic lids, mixed gently and then incubated for 18 hours to 24 hours at 37°C in a 5% carbon dioxide atmosphere.
  • the plates are centrifuged for 10 minutes at 1000 rpm (approximately 200 x g) at 4 0 C.
  • the cell-free culture supernatant is removed and transferred to sterile polypropylene tubes. Samples are maintained at -30°C to -7O 0 C until analysis.
  • the samples are analyzed for IFN- ⁇ by ELISA and for TNF- ⁇ by IGEN/BioVeris Assay.
  • IFN- ⁇ concentration is determined with a human multi-subtype colorimetric sandwich ELISA (Catalog Number 41105) from PBL Biomedical Laboratories, Piscataway, NJ. Results are expressed in pg/mL.
  • the TNF- ⁇ concentration is determined by ORIGEN M-Series Immunoassay and read on an IGEN M-8 analyzer from BioVeris Corporation, formerly known as IGEN International, Gaithersburg, MD.
  • the immunoassay uses a human TNF- ⁇ capture and detection antibody pair (Catalog Numbers AHC3419 and AHC3712) from Biosource International, Camarillo, CA. Results are expressed in pg/mL.
  • the data output of the assay consists of concentration values of TNF- ⁇ and IFN- ⁇ (y-axis) as a function of compound concentration (x-axis).
  • the reference compound used is 2-[4-amino-2-ethoxymethyl-6,7,8,9-tetrahydro- ⁇ , ⁇ - dimethyl-lH-imidazo[4,5-c]quinolin-l-yl]ethanol hydrate (U.S. Patent No. 5,352,784; Example 91) and the expected area is the sum of the median dose values from the past 61 experiments.
  • the minimum effective concentration is calculated based on the background- subtracted, reference-adjusted results for a given experiment and compound.
  • the minimum effective concentration ( ⁇ molar) is the lowest of the tested compound concentrations that induces a response over a fixed cytokine concentration for the tested cytokine (usually 20 pg/mL for IFN- ⁇ and 40 pg/mL for TNF- ⁇ ).
  • the maximal response is the maximal amount of cytokine (pg/ml) produced in the dose-response.
  • the CYTOKINE INDUCTION IN HUMAN CELLS test method described above was modified as follows for high throughput screening.
  • PBMC Peripheral blood mononuclear cells
  • HISTOPAQUE- 1077 Sigma, St. Louis, MO
  • Ficoll-Paque Plus Amersham Biosciences Piscataway, NJ
  • Whole blood is placed in Accuspin (Sigma) or LeucoSep (Greiner Bio-One, Inc., Longwood, FL) centrifuge frit tubes containing density gradient medium.
  • the PBMC layer is collected and washed twice with DPBS or HBSS and re- suspended at 4 x 10 6 cells/mL in RPMI complete (2-fold the final cell density).
  • the PBMC suspension is added to 96-well flat bottom sterile tissue culture plates.
  • the compounds are solubilized in dimethyl sulfoxide (DMSO).
  • DMSO dimethyl sulfoxide
  • Controls include cell samples with media only, cell samples with DMSO only (no compound), and cell samples with a reference compound 2-[4-amino-2-ethoxymethyl-6,7,8,9-tetrahydro- ⁇ , ⁇ -dimethyl- lH-imidazo[4,5-c]quinolin-l-yl]ethanol hydrate (U.S. Patent No. 5,352,784; Example 91) on each plate.
  • test compound is added at 7.5 mM to the first well of a dosing plate and serial 3 fold dilutions are made for the 7 subsequent concentrations in DMSO.
  • RPMI Complete media is then added to the test compound dilutions in order to reach a final compound concentration of 2-fold higher (60 - 0.028 ⁇ M) than the final tested concentration range.
  • test compound solution is then added to the wells containing the PBMC suspension bringing the test compound concentrations to the desired range (usually 30 ⁇ M - 0.014 ⁇ M) and the DMSO concentration to 0.4%.
  • desired range usually 30 ⁇ M - 0.014 ⁇ M
  • DMSO concentration 0.4%
  • MSD MULTI-SPOT plates contain within each well capture antibodies for human TNF- ⁇ and human IFN- ⁇ that have been pre-coated on specific spots.
  • Each well contains four spots: one human TNF- ⁇ capture antibody (MSD) spot, one human IFN- ⁇ capture antibody (PBL Biomedical Laboratories, Piscataway, NJ) spot, and two inactive bovine serum albumin spots.
  • the human TNF- ⁇ capture and detection antibody pair is from MesoScale Discovery.
  • the human IFN- ⁇ multi-subtype antibody (PBL Biomedical Laboratories) captures all IFN- ⁇ subtypes except IFN- ⁇ F (IFNA21). Standards consist of recombinant human TNF- ⁇ (R&D Systems, Minneapolis, MN) and IFN- ⁇ (PBL
  • the data output of the assay consists of concentration values of TNF- ⁇ or IFN- ⁇ (y-axis) as a function of compound concentration (x-axis).
  • a plate-wise scaling is performed within a given experiment aimed at reducing plate-to-plate variability associated within the same experiment.
  • the greater of the median DMSO (DMSO control wells) or the experimental background (usually 20 pg/mL for IFN- ⁇ and 40 pg/mL for TNF- ⁇ ) is subtracted from each reading. Negative values that may result from background subtraction are set to zero.
  • Each plate within a given experiment has a reference compound that serves as a control. This control is used to calculate a median expected area under the curve across all plates in the assay.
  • a plate- wise scaling factor is calculated for each plate as a ratio of the area of the reference compound on the particular plate to the median expected area for the entire experiment.
  • the data from each plate are then multiplied by the plate-wise scaling factor for all plates. Only data from plates bearing a scaling factor of between 0.5 and 2.0 (for both cytokines IFN- ⁇ , TNF- ⁇ ) are reported. Data from plates with scaling factors outside the above- mentioned interval are retested until they bear scaling factors inside the above mentioned interval. The above method produces a scaling of the y- values without altering the shape of the curve.
  • the reference compound used is 2-[4-amino-2-ethoxymethyl-6,7,8,9- tetrahydro- ⁇ , ⁇ -dimethyl-lH-imidazo[4,5-c]quinolin-l-yl]ethanol hydrate (U.S. Patent No. 5,352,784; Example 91).
  • the median expected area is the median area across all plates that are part of a given experiment.
  • a second scaling may also be performed to reduce inter-experiment variability (across multiple experiments). All background-subtracted values are multiplied by a single adjustment ratio to decrease experiment-to-experiment variability.
  • the adjustment ratio is the area of the reference compound in the new experiment divided by the expected area of the reference compound based on an average of previous experiments (unadjusted readings). This results in the scaling of the reading (y-axis) for the new data without changing the shape of the dose-response curve.
  • the reference compound used is 2-[4- amino-2-ethoxymethyl-6,7,8,9-tetrahydro- ⁇ , ⁇ -dimethyl-lH-imidazo[4,5-c]quinolin-l- yl]ethanol hydrate (U.S. Patent No. 5,352,784; Example 91) and the expected area is the sum of the median dose values from an average of previous experiments.
  • the minimum effective concentration is calculated based on the background- subtracted, reference-adjusted results for a given experiment and compound.
  • the minimum effective concentration ( ⁇ molar) is the lowest of the tested compound concentrations that induces a response over a fixed cytokine concentration for the tested cytokine (usually 20 pg/mL for IFN- ⁇ and 40 pg/mL for TNF- ⁇ ).
  • the maximal response is the maximal amount of cytokine (pg/ml) produced in the dose-response.

Abstract

Imidazo[4,5-c] ring compounds, (e.g. imidazo[4,5-c]pyridines, imidazo[4,5-c]quinolines, 6,7,8,9-tetrahydro imidazo[4,5-c]quinolines, imidazo[4,5-c]naphthyridine, and 6,7,8,9-tetrahydro imidazo[4,5-c]naphthyridine compounds) having an oxime or hydroxylamine substituent at the 2-position, pharmaceutical compositions containing the compounds, intermediates, and methods of making and methods of use of these compounds as immunomodulators, for modulating cytokine biosynthesis in animals and in the treatment of diseases including viral and neoplastic diseases are disclosed.

Description

OXIME AND HYDROXYLAMINE SUBSTITUTED IMIDAZO [4,5 -c] RING
COMPOUNDS AND METHODS
CROSS REFERENCE TO RELATED APPLICATIONS The present invention claims priority to U.S. Provisional Application Serial No. 60/652209, filed February 11, 2005, which is incorporated herein by reference.
BACKGROUND
Certain compounds have been found to be useful as immune response modifiers (IRMs), rendering them useful in the treatment of a variety of disorders. However, there continues to be interest in and a need for compounds that have the ability to modulate the immune response, by induction of cytokine biosynthesis or other means.
SUMMARY
The present invention provides a new class of compounds that are useful in inducing cytokine biosynthesis in animals. Such compounds are of the following Formula I:
Figure imgf000002_0001
I wherein RA, RB, X, Z, R1, and R2-I are as defined below.
The compounds of Formula I are useful as immune response modifiers due to their ability to induce cytokine biosynthesis (e.g., induces the synthesis of at least one cytokine) and otherwise modulate the immune response when administered to animals. This makes the compounds useful in the treatment of a variety of conditions such as viral diseases and tumors that are responsive to such changes in the immune response.
The invention further provides pharmaceutical compositions containing an effective amount of a compound of Formula I and methods of inducing cytokine biosynthesis in an animal, treating a viral infection or disease and/or treating a neoplastic disease in an animal by administering an effective amount of a compound of Formula I to the animal.
In addition, methods of synthesizing compounds of Formula I and intermediates useful in the synthesis of these compounds are provided.
As used herein, "a," "an," "the," "at least one," and "one or more" are used interchangeably.
The terms "comprises" and variations thereof do not have a limiting meaning where these terms appear in the description and claims. The above summary of the present invention is not intended to describe each disclosed embodiment or every implementation of the present invention. The description that follows more particularly exemplifies illustrative embodiments. In several places throughout the description, guidance is provided through lists of examples, which examples can be used in various combinations. In each instance, the recited list serves only as a representative group and should not be interpreted as an exclusive list.
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS OF THE
INVENTION
The present invention provides compounds of the following Formulas I, II, III, IV, V, VI, and VII:
Figure imgf000003_0001
I
Figure imgf000003_0002
II
Figure imgf000004_0001
III
Figure imgf000004_0002
IV
Figure imgf000004_0003
V
Figure imgf000004_0004
10 VII as well as certain intermediates of the following Formula VIII:
Figure imgf000004_0005
wherein RA, RB, RAI, RBI, RA2, RB2, R, R', RI5 R2-1, R3, m, n, p, G, X, and Z are as defined below; and pharmaceutically acceptable salts thereof.
In one embodiment, the present invention provides a compound of Formula I:
Figure imgf000005_0001
I wherein:
Z is selected from the group consisting of:
-C(=N-O-R2-2)- and -C(R2-4)(-N(-OR2-2)-Y-R2-3)-;
X is selected from the group consisting of a bond, C1-4 alkylene and C2-4 alkenylene;
R2-I, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)0-2-R2-S, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl,
-C(O)-N(Rg)2,
Figure imgf000006_0001
-NH-C(O)-NH-R2-5, -NH-C(O)-NH2 -O-(CO)-alkyl, and
-C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom; R2-4 is selected from the group consisting of hydrogen, C1-4alkyl, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3;
Y is selected from the group consisting of: a bond,
-C(R6)-, -S(O)2-, -S(O)2-N(R8)-,
Figure imgf000007_0001
-C(O)-O-, -C(R6)-N(R8)-,
Figure imgf000007_0002
-C(R6)-N(R8)-C(O)-,
Figure imgf000007_0003
-C(O)-C(O)-, -C(O)-C(O)-O-, and -C(=NH)-N(R8)-;
RA and RB are each independently selected from the group consisting of: hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and -N(Re)2; or when taken together, RA and RB form a fused benzene ring or fused pyridine ring wherein the fused benzene ring or fused pyridine ring is unsubstituted or substituted by one or more R"1 groups; or when taken together, RA and RB form a fused cyclohexene ring or a fused tetrahydropyridine ring, wherein the fused cyclohexene or tetrahydropyridine ring is unsubstituted or substituted by one or more R groups; R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
-N(Rs)2;
5 R' is hydrogen or a non-interfering substituent;
R'" is a non-interfering substitutent; R6 is selected from the group consisting of =0 and =S; R8 is selected from the group consisting of hydrogen, CMO alkyl, C2-I0 alkenyl, C1-1O alkoxy-C1-10 alkylenyl, hydroxy-C1-10 alkylenyl, heteroaryl-Cj-io alkylenyl, and 10 aryl-C ^10 alkylenyl ;
R9 is selected from the group consisting of hydrogen and alkyl; and R10 is C3-8 alkylene; or a pharmaceutically acceptable salt thereof.
In another embodiment, the present invention provides a compound of Formula II:
Figure imgf000008_0001
II wherein:
Z is selected from the group consisting of:
-C(=N-O-R2-2)- and 0 -C(R2-4)(-N(-OR2-2)-Y-R2-3)-;
X is selected from the group consisting of a bond, C1-4 alkylene and C2-4 alkenylene;
R2-], R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, 25 alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino,
-S(O)0-2-R2-5,
-NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro,
-N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl,
-C(O)-N(R8)2,
-N(Rs)-C(O)-R2-5,
-NH-C(O)-NH-R2-5,
-NH-C(O)-NH2 -O-(CO)-alkyl, and
-C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom; R2-4 is selected from the group consisting of hydrogen, Ci-4alkyl, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-,
-S(O)2-, -S(O)2-N(R8)-,
Figure imgf000010_0001
-C(O)-O-, -C(R6)-N(R8)-, -C(O)-N(Rg)-S(O)2-, -C(Re)-N(Rg)-C(O)-,
. -C(O) - N
R10
-C(O)-C(O)-, -C(O)-C(O)-O-, and
-C^NH)-N(R8)-; RA1 and RB1 are each independently selected from the group consisting of: hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and
-N(Rg)2; R1 is selected from the group consisting of:
-R4, -X'-R4, -X-Y-R4, -X-Y-X-Y-R4, and
-X'-R5;
X1 is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of:
-O-,
-S(O)0-2-,
-S(O)2-N(R8)-, -C(R6)-,
-C(R6)-0-,
-0-C(R6)-,
-0-C(O)-O-,
Figure imgf000011_0001
-C(R6)-N(R8)-,
-0-C(Re)-N(R8)-,
-C(Re)-N(OR9)-,
-0-N(R8)-Q-,
-0-N=C(R4)-,
Figure imgf000011_0002
-CH(-N(-O-R8)-Q-R4)-,
Figure imgf000011_0003
Figure imgf000012_0001
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino, (dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo; R5 is selected from the group consisting of:
Figure imgf000012_0002
R6 is selected from the group consisting of =0 and =S;
R7 is C2-7 alkylene; R8 is selected from the group consisting of hydrogen, C1-10 alkyl, C2-10 alkenyl,
C1-10 alkoxy-C1-10 alkylenyl, hydroxy-C1-10 alkylenyl, heteroaryl-d-to alkylenyl, and aryl-Ci-io alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl; R10 is C3-8 alkylene;
A is selected from the group consisting of -O-, -C(O)-, -S(O)0-2-, -CH2-, and
-NC-Q-R4)S
A1 is selected from the group consisting of -0-, -S(O)0-2-, -NC-Q-R4)-, and -CH2-; Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-,
-S(O)2-, -C(Re)-N(Rg)-W-, -S(O)2-N(R8)-, -C(Re)-O-, -C(Re)-S-, and -C(R6)-N(OR9)-;
V is selected from the group consisting Of-C(R6)-, -0-C(R6)-, -N(Rs)-C(R6)-, and -S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof.
In another embodiment, the present invention provides a compound of Formula III:
Figure imgf000013_0001
III wherein:
Z is selected from the group consisting of: -C(=N-O-R2-2)- and -C(R2-4)(-N(-OR2-2)- Y-R2-3)-;
X is selected from the group consisting of a bond, C1-4 alkylene and C2-4 alkenylene;
R2-1, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino,
-S(O)0-2-R2-5, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl, -C(O)-N(Rs)2, -N(R8)-C(O)-R2-5,
-NH-C(O)-NH-R2-5, -NH-C(O)-NH2 -O-(CO)-alkyl, and -C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom; R2-4 is selected from the group consisting of hydrogen, C1-4alkyl, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-, -S(O)2-, -S(O)2-N(R8)-,
Figure imgf000015_0001
-C(O)-O-, -C(R6)-N(R8)-,
Figure imgf000015_0002
-C(Re)-N(Re)-C(O)-,
Figure imgf000015_0003
-C(O)-C(O)-,
-C(O)-C(O)-O-, and
-C(^NH)-N(R8)-;
R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
-N(Rg)2; n is an integer from O to 4; R1 is selected from the group consisting of: -R4, -X'-R4, -X'-Y'-R^
-X'-Y'-X'-Y'-R^ and -X'-R5;
R3 is selected from the group consisting of:
-Z'-R4,
-z'-x'-m,
-Z'-X'-Y'-R^ -Z'-X'-Y'-X'-Y'-R^ and
-Z'-X'-R5; m is 0 or 1, with the proviso that when m is 1 then n is 0 or 1 ; X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y1 is selected from the group consisting of: -O-,
-S(O)0-2-, -S(O)2-N(R8)-,
-C(R6)-, -C(Rg)-O-, -0-C(R6)-, -0-C(O)-O-, -N(R8)-Q-,
-C(Re)-N(Re)-, -0-C(Re)-N(R8)-, -C(Re)-N(OR9)-, -O-N(R8)-Q-, -0-N=C(R4)-,
-C(=N-O-R8)-3 -CH(-N(-O-R8)-Q-R4)-,
Figure imgf000017_0001
Z' is a bond or -O-;
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino,
(dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
Figure imgf000017_0002
R6 is selected from the group consisting of =0 and =S; R7 is C2-7 alkylene;
Rg is selected from the group consisting of hydrogen, C1-10 alkyl, C2-10 alkenyl, Cj-10 alkoxy-Ci-10alkylenyl, hydroxy-Ci-10alkylenyl, heteroaryl-Ci.10 alkylenyl, and aryl-Ci-io alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl; R10 is C3.s alkylene;
A is selected from the group consisting of -0-, -C(O)-, -S(O)0-2-, -CH2-, and -NC-Q-R4)-; A' is selected from the group consisting of -0-, -S(O)0-2-, -NX-Q-R4)-, and -CH2-;
Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-, -S(O)2-, -C(Re)-NCRs)-W-, -S(O)2-N(R8)-, -C(Re)-O-, -C(Rg)-S-, and -C(Re)-N(OR9)-;
V is selected from the group consisting of -C(R6)-, -0-C(R6)-, -N(Rs)-C(R6)-, and -S(O)2-; W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof.
In another embodiment, the present invention provides a compound of Formula IV:
Figure imgf000018_0001
IV wherein:
Z is selected from the group consisting of:
Figure imgf000018_0002
-C(R2-4)(-N(-OR2-2)-Y-R2-3)-; X is selected from the group consisting of a bond, C1-4 alkylene and
C2-4 alkenylene;
R2-i, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)0-2-R2-5, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl, -C(O)-N(Rs)2,
-N(R8)-C(O)-R2-5, -NH-C(O)-NH-R2-5, -NH-C(O)-NH2 -O-(CO)-alkyl, and -C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom;
R2-4 is selected from the group consisting of hydrogen,
Figure imgf000020_0001
and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-, -S(O)2-, -S(O)2-N(R8)-,
Figure imgf000020_0002
-C(O)-O-, -C(Re)-N(R8)-, -C(O)-N(Rs)-S(O)2-, -C(R6)-N(R8)-C(O)-,
Figure imgf000020_0003
-C(O)-C(O)-, -C(O)-C(O)-O-, and -Q=NH)-N(R8)-; R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
-N(Rs)2; n is an integer from 0 to 4;
Ri is selected from the group consisting of:
-R45
-X-R4,
-X'-Y'-R4,
Figure imgf000021_0001
-X-R5;
X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of:
-O-,
-S(O)0-2-,
-S(O)2-N(R8)-, -C(R6)-,
-C(Rg)-O-,
-0-C(R6)-,
-0-C(O)-O-,
-N(R8)-Q-, -C(Rg)-N(R8)-,
-O-C(R6)-N(R8)-,
-C(R6)-N(OR9)-,
Figure imgf000021_0002
-0-N=C(R4)-, -C(HN-O-R8)-,
-CHC-NC-O-Rg)-Q-R4)-,
Figure imgf000022_0001
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino, (dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
Figure imgf000022_0002
R6 is selected from the group consisting of =O and =S; R7 is C2-7 alkylene;
R8 is selected from the group consisting of hydrogen, C1-10 alkyl, C2-I0 alkenyl, C1-Io alkoxy-Ci-10alkylenyl, hydroxy-Ci_10alkylenyl, heteroaryl-Ci.ioalkylenyl, and aryl-C i .10 alkylenyl ; R9 is selected from the group consisting of hydrogen and alkyl;
Rio is C3-8 alkylene;
A is selected from the group consisting of -O-, -C(O)-, -S(O)0-2-, -CH2-, and -NO-Q-R4)-;
A' is selected from the group consisting of -O-, -S(O)0-2-, -N(-Q-R_s)-, and -CH2-; Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-,
-S(O)2-, -C(Re)-N(Rg)-W-, -S(O)2-N(R8)-, -C(Rg)-O-, -C(Re)-S-, and -C(Re)-N(OR9)-;
V is selected from the group consisting of -C(R6)-, -0-C(R6)-, -N(Rg)-C(R6)-, and -S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof.
In another embodiment, the present invention provides a compound of Formula V:
Figure imgf000023_0001
V wherein:
Z is selected from the group consisting of: -C(=N-O-R2-2)- and -C(R2-4)(-N(-OR2-2)-Y-R2-3)-;
X is selected from the group consisting of a bond, C1-4 alkylene and C2-4 alkenylene;
R2-I, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino,
-S(O)0-2-R2-5, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl, -C(O)-N(R8)2, -N(Rg)-C(O)-R2-5,
-NH-C(O)-NH-R2-5, -NH-C(O)-NH2 -O-(CO)-alkyl, and -C(O)-alkyl; with the proviso that R2.2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom; R2-4 is selected from the group consisting of hydrogen, Ci-4alkyl, and phenyl;
R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-, -S(O)2-, -S(O)2-N(R8)-,
Figure imgf000025_0001
-C(O)-O-, -C(Re)-N(R8)-, -C(O)-N(R8)-S(O)2-, -C(Re)-N(Re)-C(O)-,
Figure imgf000025_0002
-C(O)-C(O)-,
-C(O)-C(O)-O-, and
-C(^NH)-N(R8)-;
R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
Figure imgf000026_0001
p is an integer from 0 to 3; Ri is selected from the group consisting of:
-R4, -X' -R4, -T-Y-R4,
-X'-Y'-X'-Y'-R^ and -X-R5;
R3 is selected from the group consisting of:
-Z'-R4,
-Z -X -R4, -Z'-X'-Y'-R^ -Z'-X'-Y'-X'-Y'-R^ and
-Z'-X'-Rs; m is 0 or 1 , with the proviso that when m is 1 then p is 0 or 1 ; X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y1 is selected from the group consisting of: -O-,
-S(O)0-2-, -S(O)2-N(R8)-,
-C(R6)-, -C(R6)-O-, -0-C(R6)-, -0-C(O)-O-, -N(Re)-Q-,
-C(R6)-N(R8)-, -0-C(Re)-N(R8)-, -C(Re)-N(OR9)-,
-O-N(R8)-Q-,
-0-N=C(R4)-,
Figure imgf000027_0001
-CH(-N(-O-R8)-Q-R4)-,
Figure imgf000027_0002
Z' is a bond or -O- ;
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino,
(dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of: -N C(R6) -N- S(O)2
Figure imgf000028_0001
Figure imgf000028_0002
R6 is selected from the group consisting of =0 and =S; R7 is C2-7 alkylene; R8 is selected from the group consisting of hydrogen, C1-10 alkyl, C2-I0 alkenyl,
Ci-Io alkoxy-Cj-io alkylenyl, hydroxy-Ci-i0 alkylenyl5 heteroaryl-C1-10 alkylenyl, and aryl-C^io alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl; Rio is C3-8 alkylene; A is selected from the group consisting of -O-, -C(O)-, -S(0)o-2-, -CH2-, and
-NC-Q-R4)-;
A' is selected from the group consisting of -O-, -S(0)o-2-, -NC-Q-R4)-, and -CH2-;
Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-, -S(O)2-, -C(R6)-N(R8)-W-, -S(O)2-N(R8)-, -C(Rg)-O-, -C(Rg)-S-, and -C(Rg)-N(OR9)-; V is selected from the group consisting of -C(R6)-, -0-C(R6)-, -N(Rg)-C(R6)-, and
-S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof. In another embodiment, the present invention provides a compound of Formula VI:
Figure imgf000028_0003
VI wherein:
Z is selected from the group consisting of: -C(=N-O-R2-2)- and -C(R2-4)(-N(-OR2-2)-Y-R2_3)-;
X is selected from the group consisting of a bond, Ci-4 alkylene and C2-4 alkenylene;
R2-1, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)0-2-R2-5, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl, -C(O)-N(Rs)2,
Figure imgf000030_0001
-NH-C(O)-NH-R2-5, -NH-C(O)-NH2 -O-(CO)-alkyl, and -C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom; R2-4 is selected from the group consisting of hydrogen, Ci-4alkyl, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-, -S(O)2-,
-S(O)2-N(R8)-,
Figure imgf000030_0002
-C(O)-O-,
-C(Rg)-N(R8)-, -C(O)-N(R8)-S(O)2-,
-C(R6)-N(R8)-C(O)-,
Figure imgf000030_0003
-C(O)-C(O)-, -C(O)-C(O)-O-, and -CC=NH)-N(R8)-; R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and -N(R9)2; p is an integer from 0 to 3;
R1 is selected from the group consisting of:
-R4, -X-R4, -X' -Y-R4,
-X-T-X-Y-R4, and
-X'-Rs;
X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of: -O-,
-S(O)0-2-, -S(O)2-N(R8)-,
-C(R6)-, -C(R6)-O-, -0-C(R6)-, -0-C(O)-O-,
Figure imgf000031_0001
-C(R6)-N(R8)-,
Figure imgf000031_0002
-C(Re)-N(OR9)-,
-O-N(R8)-Q-,
-0-N=C(R4)-,
-CC=N-O-R8)-,
-CHC-NC-O-Rs)-Q-R4)-,
Figure imgf000032_0001
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino, (dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
Figure imgf000033_0001
R6 is selected from the group consisting of =0 and =S; R7 is C2-7 alkylene; Rg is selected from the group consisting of hydrogen, C1-10 alkyl, C2-J0 alkenyl,
C1-Io alkoxy-C].io alkylenyl, hydroxy-d-io alkylenyl, heteroaryl-C1-10 alkylenyl, and aryl-Cj.jo alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl; R1O is C3-8 alkylene; A is selected from the group consisting of -O-, -C(O)-, -S(O)0-2-, -CH2-, and
-Nt-Q-R4)-;
A' is selected from the group consisting of -O-, -S(O)0-2-, -NO-Q-R4)-, and -CH2-; Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-, -S(O)2-, -C(R6)-N(R8)-W-, -S(O)2-N(R8)-, -C(Rg)-O-, -C(Rg)-S-, and -C(Rg)-N(OR9)-; V is selected from the group consisting of -C(R6)-, -0-C(R6)-, -N(Rs)-C(R6)-, and
-S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof. In another embodiment, the present invention provides a compound of Formula
VII, which is a prodrug:
Figure imgf000033_0002
VII wherein: G is selected from the group consisting of: -C(O)-R", α-aminoacyl, α-aminoacyl-α-aminoacyl, -C(O)-O-R", -C(O)-N(Rim)R",
-C(=NYi)-R", -CH(OH)-C(O)-OY1, -CH(OC1-4 alkyl) Y0, -CH2Y2, and -CH(CH3)Y2;
R" and R"" are independently selected from the group consisting of Cj-1O alkyl, C3-7 cycloalkyl, phenyl, and benzyl, each of which may be unsubstituted or substituted by one or more substituents independently selected from the group consisting of halogen, hydroxy, nitro, cyano, carboxy, C1-6 alkyl, Ci-4 alkoxy, aryl, heteroaryl, aryl-C1-4 alkylenyl, heteroaryl-C1-4 alkylenyl, halo-C1-4 alkylenyl, halo-C1-4 alkoxy, -0-C(O)-CH3,
-C(O)-O-CH3, -C(O)-NH2, -0-CH2-C(O)-NH2, -NH2, and -S(O)2-NH2, with the proviso that R"" can also be hydrogen; α-aminoacyl is an α-aminoacyl group derived from an α-amino acid selected from the group consisting of racemic, D-, and L-amino acids; Yi is selected from the group consisting of hydrogen, C1-6 alkyl, and benzyl;
Y0 is selected from the group consisting of Ci-6 alkyl, carboxy-C1-6 alkylenyl, amino-C1-4 alkylenyl, mono-iV-C1-6 alkylamino-C1-4 alkylenyl, and di-iV, JV-C1-6 alkylamino-C1-4 alkylenyl;
Y2 is selected from the group consisting of mono-N-d-ealkylamino, di-Λζ JV-C1-6 alkylamino, morpholin-4-yl, piperidin-1 -yl, pyrrolidin-1-yl, and 4-Ci-4 alkylpiperazin-1-yl;
RA2 and RB2 are each independently selected from the group consisting of: hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and •
-N(R9)2; or when taken together, RA2 and RB2 form a fused benzene ring or fused pyridine ring wherein the fused benzene ring or fused pyridine ring is unsubstituted or substituted by one R3 group, or one R3 group and one R group, or one, two, three, or four R groups when on the fused benzene ring, or one, two, or three R groups when on the fused pyridine ring; or when taken together, RA2 and RB2 form a fused cyclohexene ring or a fused tetrahydropyridine ring, wherein the fused cyclohexene or tetrahydropyridine ring is unsubstituted or substituted by one or more R groups; and
X, Z, R2-1, R1, R, and R3 are defined as in Formula III above; or a pharmaceutically acceptable salt thereof.
In one embodiment, the present invention provides an intermediate compound of Formula VIII:
Figure imgf000035_0001
VIII wherein X, Z, R2-1, R1, R, and n are defined as in Formula III above; or a pharmaceutically acceptable salt thereof.
In one embodiment of Formula VIII, R1 is preferrably tetrahydro-2H-pyran-4- ylmethyl as shown in Formula Villa:
Figure imgf000035_0002
Villa which compound or pharmaceutically acceptable salt thereof has been found to induce cytokine biosynthesis as described herein for compounds or salts of Formulas I- VII. Herein, "non-interfering" means that the ability of the compound or salt, which includes a non-interfering substituent, to modulate the biosynthesis of one or more cytokines is not destroyed by the non-interfering substituent. For certain embodiments, R'" is a non-interfering substituent. Illustrative non-interfereing R1 groups include those described above for R1. Illustrative non-interfering R'" groups include those described above for R and R3.
As used herein, the terms "alkyl", "alkenyl", "alkynyl" and the prefix "alk-" are inclusive of both straight chain and branched chain groups and of cyclic groups, e.g., cycloalkyl and cycloalkenyl. Unless otherwise specified, these groups contain from 1 to 20 carbon atoms, with alkenyl groups containing from 2 to 20 carbon atoms, and alkynyl groups containing from 2 to 20 carbon atoms. In some embodiments, these groups have a total of up to 10 carbon atoms, up to 8 carbon atoms, up to 6 carbon atoms, or up to 4 carbon atoms. Cyclic groups can be monocyclic or polycyclic and preferably have from 3 to 10 ring carbon atoms. Exemplary cyclic groups include cyclopropyl, cyclopropylmethyl, cyclobutyl, cyclobutylmethyl, cyclopentyl, cyclopentylmethyl, cyclohexyl, cyclohexylmethyl, adamantyl, and substituted and unsubstituted bornyl, norbornyl, and norbornenyl.
Unless otherwise specified, "alkylene", "alkenylene", and "alkynylene" are the divalent forms of the "alkyl", "alkenyl", and "alkynyl" groups defined above. The terms, "alkylenyl", "alkenylenyl", and "alkynylenyl" are use when "alkylene", "alkenylene", and "alkynylene", respectively, are substituted. For example, an arylalkylenyl group comprises an alkylene moiety to which an aryl group is attached.
The term "haloalkyl" is inclusive of groups that are substituted by one or more halogen atoms, including perfluorinated groups. This is also true of other groups that include the prefix "halo-." Examples of suitable haloalkyl groups are chloromethyl, trifluoromethyl, and the like.
The term "aryl" as used herein includes carbocyclic aromatic rings or ring systems. Examples of aryl groups include phenyl, naphthyl, biphenyl, fluorenyl and indenyl.
Unless otherwise indicated, the term "heteroatom" refers to the atoms O, S, or N. The term "heteroaryl" includes aromatic rings or ring systems that contain at least one ring heteroatom (e.g., O, S, N). In some embodiments, the term "heteroaryl" includes a ring or ring system that contains 2-12 carbon atoms, 1-3 rings, 1-4 heteroatoms, and O, S, and N as the heteroatoms. Exemplary heteroaryl groups include furyl, thienyl, pyridyl, quinolinyl, isoquinolinyl, indolyl, isoindolyl, triazolyl, pyrrolyl, tetrazolyl, imidazolyl, pyrazolyl, oxazolyl, thiazolyl, benzofuranyl, benzothiophenyl, carbazolyl, benzoxazolyl, pyrimidinyl, benzimidazolyl, quinoxalinyl, benzothiazolyl, naphthyridinyl, isoxazolyl, isothiazolyl, purinyl, quinazolinyl, pyrazinyl, 1-oxidopyridyl, pyridazinyl, triazinyl, tetrazinyl, oxadiazolyl, thiadiazolyl, and so on.
The term "heterocyclyl" includes non-aromatic rings or ring systems that contain at least one ring heteroatom (e.g., O, S5 N) and includes all of the fully saturated and partially unsaturated derivatives of the above mentioned heteroaryl groups. In some embodiments, the term "heterocyclyl" includes a ring or ring system that contains 2-12 carbon atoms, 1-3 rings, 1-4 heteroatoms, and O, S, and N as the heteroatoms. Exemplary heterocyclyl groups include pyrrolidinyl, tetrahydrofuranyl, morpholinyl, thiomorpholinyl, 1,1- dioxothiomorpholinyl, piperidinyl, piperazinyl, thiazolidinyl, imidazolidinyl, isothiazolidinyl, tetrahydropyranyl, quinuclidinyl, homopiperidinyl (azepanyl), 1 ,4- oxazepanyl, homopiperazinyl (diazepanyl), 1,3-dioxolanyl, aziridinyl, azetidinyl, dihydroisoquinolin-(lif)-yl, octahydroisoquinolin-(lH)-yl, dihydroquinolin-(2H)-yl, octahydroquinolin-(2H)-yl, dihydro-lH-imidazolyl, 3-azabicyclo[3.2.2]non-3-yl, and the like.
The term "heterocyclyl" includes bicylic and tricyclic heterocyclic ring systems. Such ring systems include fused and/or bridged rings and spiro rings. Fused rings can include, in addition to a saturated or partially saturated ring, an aromatic ring, for example, a benzene ring. Spiro rings include two rings joined by one spiro atom and three rings joined by two spiro atoms.
When "heterocyclyl" contains a nitrogen atom, the point of attachment of the heterocyclyl group may be the nitrogen atom.
The terms "arylene", "heteroarylene", and "heterocyclylene" are the divalent forms of the "aryl", "heteroaryl", and "heterocyclyl" groups defined above. The terms, "arylenyl", "heteroarylenyl", and "heterocyclylenyl" are used when "arylene", "heteroarylene", and "heterocyclylene", respectively, are substituted. For example, an alkylarylenyl group comprises an arylene moiety to which an alkyl group is attached.
When a group (or substituent or variable) is present more than once in any Formula described herein, each group (or substituent or variable) is independently selected, whether explicitly stated or not. For example, for the formula -N(Rs)-C(O)-N(Rg)- each R8 group is independently selected. In another example, when an Ri and an R3 group both contain an R4 group, each R4 group is independently selected. In a further example, when more than one Y1 group is present and each Y' group contains one or more R8 groups, then each Y1 group is independently selected, and each R8 group is independently selected.
The invention is inclusive of the compounds described herein in any of their pharmaceutically acceptable forms, including isomers (e.g., diastereomers and enantiomers), salts, solvates, polymorphs, prodrugs, and the like. In particular, if a compound is optically active, the invention specifically includes each of the compound's enantiomers as well as racemic mixtures of the enantiomers. It should be understood that the term "compound" includes any or all of such forms, whether explicitly stated or not (although at times, "salts" are explicitly stated).
The term "prodrug" means a compound that can be transformed in vivo to yield an immune response modifying compound, including any of the salt, solvated, polymorphic, or isomeric forms described above. The prodrug, itself, may be an immune response modifying compound, including any of the salt, solvated, polymorphic, or isomeric forms described above. The transformation may occur by various mechanisms, such as through a chemical (e.g., solvolysis or hydrolysis, for example, in the blood) or enzymatic biotransformation. A discussion of the use of prodrugs is provided by T. Higuchi and W. Stella, "Pro-drugs as Novel Delivery Systems," Vol. 14 of the A. C. S. Symposium Series, and in Bioreversible Carriers in Drug Design, ed. Edward B. Roche, American Pharmaceutical Association and Pergamon Press, 1987.
For any of the compounds presented herein, each one of the following variables (e.g., Z, X, Y, Y', RAI, RBI, R, RI5 R2-i> R3> Q9 G, n, and so on) in any of its embodiments can be combined with any one or more of the other variables in any of their embodiments and associated with any one of the formulas described herein, as would be understood by one of skill in the art. Each of the resulting combinations of variables is an embodiment of the present invention.
For certain embodiments of Formula I, R"' is a non-interfering substituent.
For certain embodiments of Formula I, the one or more R"1 groups are one R3 group, or one R3 group and one R group, or one, two, three, or four R groups when on the fused benzene ring, or one, two, or three R groups when on the fused pyridine ring; wherein R3 is selected from the group consisting of -Z^R4, -Z'-X'-Rj, -Z1 -X' -Y' -R4, -Z'-X'-Y'-X'-Y'-R,, and -Z'-X'-R5.
For certain embodiments of Formula I or VII, RA and RB or RA2 and RB2, respectively, are each independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and -N(Rg)2. For certain embodiments, RA and RB or RA2 and RB2 are each independently selected from the group consisting of hydrogen and alkyl. For certain embodiments, RA and RB or RA2 and RB2 are both methyl.
For certain embodiments of Formula I5 RA and RB are taken together to form a fused benzene ring wherein the benzene ring is unsubstituted or substituted by one or more R'" groups. In certain of these embodiments, the fused benzene ring is substituted by one or two R'" groups. In certain of these embodiments, the one or two R'" groups are one R3 group, or one R3 group and one R group. In certain of these embodiments, the fused benzene ring is unsubstituted. For certain embodiments of Formula VII, RA2 and RB2 are taken together to form a fused benzene ring wherein the benzene ring is unsubstituted or substituted by one R3 group, or one R3 group and one R group. In certain of these embodiments, the fused benzene ring is unsubstituted.
For certain embodiments of Formula I, RA and RB are taken together to form a fused pyridine ring wherein the pyridine ring is unsubstituted or substituted by one or more R" groups. In certain of these embodiments, the fused pyridine ring is substituted by one or two R'" groups. In certain of these embodiments, the one or two R'" groups are one R3 group, or one R3 group and one R group. In certain of these embodiments, the fused
pyridine ring is
Figure imgf000039_0001
, wherein the highlighted bond is the position where the ring is fused. In certain of these embodiments, the fused pyridine ring is unsubstituted.
For certain embodiments of Formula VII, RA2 and RB2 are taken together to form a fused pyridine ring wherein the pyridine ring is unsubstituted or substituted by one R3 group, or one R3 group and one R group. In certain of these embodiments, the fused
pyridine ring is O- , wherein the highlighted bond is the position where the ring is fused. In certain of these embodiments, the fused pyridine ring is unsubstituted. For certain embodiments of Formula I or VII, RA and RB or RA2 and RB2, respectively, are taken together to form a fused cyclohexene ring wherein the fused cyclohexene ring is unsubstituted or substituted by one or more R groups. The double bond in the cyclohexene ring is the position where the ring is fused. In certain of these embodiments, the fused cyclohexene ring is unsubstituted.
For certain embodiments of Formula I or VII, RA and RB or RA2 and RB2, respectively, are taken together to form a fused tetrahydropyridine ring, wherein the fused tetrahydropyridine ring is unsubstituted or substituted by one or more R groups. The double bond in the tetrahydropyridine ring is the position where the ring is fused. In
certain of these embodiments, the tetrahydropyridine ring is ONH , wherein the highlighted bond indicates the position where the ring is fused. In certain of these embodiments, the fused tetrahydropyridine ring is unsubstituted.
For certain embodiments of Formula I, R is hydrogen or a non-interfering substituent. For certain embodiments of Formula I, R' is a non-interfering substituent.
For certain embodiments of Formula I, R is R1; wherein R1 is selected from the group consisting Of -R4, -X-R4, -X-T-R4, -X-Y-X-Y-R4, and -X'-R5.
For certain embodiments of Formula II, RAI and RBI are each independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and -N(Rg)2.
For certain embodiments of Formula II, RA1 and RBI are each independently selected from the group consisting of hydrogen and alkyl. For certain of these embodiments, RAI and RB1 are both methyl.
For certain embodiments of Formulas I, III VI, V, VI, VII, or VIII, R is halogen or hydroxy.
For certain embodiments of Formulas III, V, or VIII, R is bromine.
For certain embodiments of Formulas III, IV or VIII, n is 0.
For certain embodiments of Formula V or VI, p is 0.
For certain embodiments, including any one of the above embodiments wherein R3 is present, R3 is benzyloxy. For certain embodiments, including any one of the above embodiments wherein R3 is present, except where R3 is benzyloxy, R3 is selected from the group consisting of phenyl, pyridin-3-yl, pyridin-4-yl, 5~(hydroxymethyl)pyridin-3-yl, 2-ethoxyphenyl, 3- (morpholine-4-carbonyl)phenyl, and 3 -(N, iV-dimethylaminocarbonyl)phenyl . For certain embodiments, including any one of the above embodiments of
Formulas III or V wherein this definition is not excluded, m is 0.
For certain embodiments, including any one of the above embodiments, Z is selected from the group consisting of -C(=N-O-R2-2)~ and -C(R2-4)(-N(-OR2-2)- Y-R2-3)-.
For certain embodiments, including any one of the above embodiments, Z is -Q=N-O-R2-2)-.
For certain embodiments, including any one of the above embodiments except where Z is -C(^N-O-R2-2)-, Z is -C(R2-4)(-N(-OR2-2)- Y-R2-3)-. For certain of these embodiments, R2-4 is hydrogen. For certain of these embodiments, Y is a bond. For certain of these embodiments, R2-3 is selected from the group consisting of hydrogen and alkyl. Alternatively, Y is selected from the group consisting of -C(O)-, -S(O)2-, and -C(O)-NH-. For certain of these embodiments, R2-3 is alkyl.
For certain embodiments, including any one of the above embodiments, R2-2 is selected from the group consisting of hydrogen, alkyl, arylalkylenyl, and heteroarylalkylenyl. For certain of these embodiments, R2-2 is hydrogen, C1-4 alkyl, benzyl, or pyridin-2-ylmethyl.
For certain embodiments, including any one of the above embodiments, R2-1 is selected from the group consisting of hydrogen, alkyl, and aryl. For certain of these embodiments, R2-I is hydrogen, Ci-4 alkyl, or phenyl.
For certain embodiments, including any one of the above embodiments, X is a bond or C1-4 alkylene. For certain of these embodiments, X is a bond, methylene, or ethylene.
For certain embodiments, including any one of the above embodiments wherein R1 is present, R1 is selected from the group consisting of -R4, -X' -R4, -X'- Y'-Rt, -X'-Y'-X'-Y'-R,, and -X'-R5. For certain embodiments, including any one of the above embodiments wherein R1 is present, R1 is selected from the group consisting of alkyl, arylalkylenyl, aryloxyalkylenyl, hydroxyalkyl, dihydroxyalkyl, alkylsulfonylalkylenyl, -X'-Y'-Rj, -X'-R5, and heterocyclylalkylenyl; wherein the heterocyclyl of the heterocyclylalkylenyl group is optionally substituted by one or more alkyl groups; wherein X' is alkylene; Y' is
-N(R8)-C(O)-5 -N(Rs)-S(O)2-, -N(Re)-C(O)-N(R8)-, or
Figure imgf000042_0001
; R4 is alkyl, aryl,
^-(CH2), ^ -N- C(R6) -N- S(O)2 -N(R8)-C(O)-N A or heteroaryl; and R5 is R7 R? , or (CH2)b-^ . For certain embodiments, including any one of the above embodiments, R1 is selected from the group consisting of 2-hydroxy-2-methylpropyl, 2-methylpropyl, propyl, ethyl, methyl, 2,3-dihydroxypropyl, 2-phenoxyethyl, 4-[(methylsulfonyl)amino]butyl, 2- methyl-2-[(methylsulfonyl)amino]propyl, 2-(acetylamino)-2-methylpropyl, 2- { [(isopropylamino)carbonyl]amino } -2-methylpropyl, 4-{[(isopropylamino)carbonyl]amino}butyl, 4-(l,l-dioxidoisothiazolidin-2-yl)butyl, tetrahydro-2H-pyran-4-ylmethyl, and (2,2-dimethyl-l,3-dioxolan-4-yl)methyl. For certain of these embodiments, R1 is tetrahydro-2H-pyran-4-ylmethyl.
For certain embodiments, including any one of the above embodiments, except where this definition is excluded, R1 is selected from the group consisting of (1- hydroxycyclobutyl)methyl, ( 1 -hydroxycyclopentyl)methyl, and ( 1 - hydroxycyclohexyl)methyl. For certain of these embodiments, R1 is (1- hy dr oxy cy clobuty l)methy 1.
For certain embodiments, R is selected from the group consisting of halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and -N(R9)2. For certain embodiments, R is selected from the group consisting of alkyl, alkoxy, hydroxy, halogen, and trifluoromethyl.
For certain embodiments, R is halogen or hydroxy.
For certain embodiments, R is bromine.
For certain embodiments, R2-1, R2-2, and R2-3 are independently selected from the group consisting of hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, or heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)0-2-R2-S, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl, -C(O)-N(R8)2, -N(Rs)-C(O)-R2-5, -NH-C(O)-NH-R2-5, -NH-C(O)-NH2, -O-(CO)-alkyl, and -C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom; For certain embodiments, R2- 1 is selected from the group consisting of hydrogen, alkyl, and aryl.
For certain embodiments, R2-] is hydrogen, C1-4 alkyl, or phenyl.
For certain embodiments, R2-1 is hydrogen.
For certain embodiments, R2-2 is selected from the group consisting of hydrogen, alkyl, arylalkylenyl, and heteroarylalkylenyl.
For certain embodiments, R2-2 is hydrogen, Ci-4 alkyl, benzyl, or pyridin-2- ylmethyl.
For certain embodiments, R2-2 is Ci-10 alkyl.
For certain embodiments, R2-2 is methyl. For certain embodiments, R2-2 is hydrogen.
For certain embodiments, R2-3 is selected from the group consisting of hydrogen and alkyl.
For certain embodiments, R2-3 is alkyl.
For certain embodiments, R2-3 is hydrogen or methyl. For certain embodiments, R2-4 is selected from the group consisting of hydrogen,
C1-4alkyl, and phenyl.
For certain embodiments, R2-4 is hydrogen.
For certain embodiments, R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3.
For certain embodiments, R2-5 is hydrogen or alkyl.
For certain embodiments, R2-5 is hydrogen or C1-4 alkyl.
For certain embodiments, R3 is selected from the group consisting of -Z^R4, -Z'-X'-R^ -Z'-X'-Y'-R4, -Z'-X'-Y'-X'-Y'-R^ and -Z'-X'-R5.
For certain embodiments, R3 is selected from the group consisting of -Z^R4, -Z'-X'-Y'-R4, and -Z'-X'-R5. For certain embodiments, R3 is -Z'-Rφ
For certain embodiments, R3 is -Z'-X'-Y'-R4.
For certain embodiments, R3 is -Z'-X'-Rs.
For certain embodiments, R3 is selected from the group consisting of phenyl, pyridin-3-yl, pyridin-4-yl, 5-(hydroxymethyl)pyridin-3-yl, 2-ethoxyphenyl, 3- (morρholine-4-carbonyl)phenyl, and 3 -(N, N-dimethylaminocarbonyl)phenyl .
For certain embodiments, including any of the above embodiments where R3 is present, -R3 is at the 7-position.
For certain embodiments, R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, .aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino, (dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo. For certain embodiments, R4 is alkyl, aryl, or heteroaryl.
For certain embodiments, R4 is hydrogen or alkyl.
For certain embodiments, R4 is C1-4 alkyl.
For certain embodiments, R5 is selected from the group consisting of:
Figure imgf000044_0001
For certain embodiments, R5 is selected from the group consisting of: - "NIN-— C VA(RI-V6) -N / -
Figure imgf000045_0001
For certain embodiments, R5 is
-
Figure imgf000045_0002
For certain embodiments, R5 is wherein V is -C(O)-, and A is -0-.
For certain embodiments, R6 is selected from the group consisting of =0 and =S. For certain embodiments, R6 is =0. For certain embodiments, R7 is C2-7 alkylene. For certain embodiments, R7 is C2-4 alkylene. For certain embodiments, R8 is selected from the group consisting of hydrogen,
C1-1O alkyl, C2-10 alkenyl, Cj-10 alkoxy-d-ioalkylenyl, hydroxy-C1-10alkylenyl, heteroaryl-C1-10alkylenyl, and aryl-Ci-10 alkylenyl.
For certain embodiments, R8 is selected from the group consisting of hydrogen, C1-4 alkyl, and C1-4 alkoxyC1-4 alkylenyl. For certain embodiments, R8 is hydrogen or C1-4 alkyl.
For certain embodiments, R8 is hydrogen.
For certain embodiments, R9 is selected from the group consisting of hydrogen and alkyl.
For certain embodiments, R10 is C3-8 alkylene. For certain embodiments, R10 is C4-6 alkylene.
For certain embodiments, A is selected from the group consisting of -O-, -C(O)-, -S(O)0-2-, -CH2-, and -NOQ-R4)-.
For certain embodiments, A is -O-, -CH2-, or -S(O)2-. For certain embodiments, A is -O- or -S(O)2-. For certain embodiments, A is -0-.
For certain embodiments, A' is selected from the group consisting of -0-, -S(O)0-2-, -NC-Q-R4)-, and -CH2-. In certain embodiments, A1 is selected from the group consisting Of-CH2-, -S(O)2-, and -0-.
In certain embodiments, A' is -NX-Q-R4)-.
In certain embodiments, A' is -CH2-. In certain embodiments, A' is -O- .
For certain embodiments, including any one of the above embodiments of Formula VII, G is selected from the group consisting of-C(O)-R", α-aminoacyl, α-aminoacyl-α- aminoacyl, -C(O)-O-R", -C(0)-N(R"")R",
Figure imgf000046_0001
-CH(OH)-C(O)-OY1, -CH(OCi-4 alkyl)Y0, -CH2Y2, and -CH(CH3)Y2. For certain of these embodiments, R" and R"" are independently selected from the group consisting of C1-Io alkyl, C3-7 cycloalkyl, phenyl, and benzyl, each of which may be unsubstituted or substituted by one or more substituents independently selected from the group consisting of halogen, hydroxy, nitro, cyano, carboxy, C1-6 alkyl, C1-4 alkoxy, aryl, heteroaryl, aryl-C1-4 alkylenyl, heteroaryl-C1-4 alkylenyl, halo-Ci-4 alkylenyl, halo-C^ alkoxy, -0-C(O)-CH3, -C(O)-O-CH3, -C(O)-NH2, -0-CH2-C(O)-NH2, -NH2, and -S(O)2-NH2, with the proviso that R"" can also be hydrogen; α-aminoacyl is an α-aminoacyl group derived from an α- amino acid selected from the group consisting of racemic, D-, and L-amino acids; Y1 is selected from the group consisting of hydrogen, Ci-6 alkyl, and benzyl; Y0 is selected from the group consisting of C1-6 alkyl, carboxy-C1-6 alkylenyl, amino-C1-4 alkylenyl, mono-iV-C1-6 alkylamino-C1-4 alkylenyl, and di- JV1JV-C1-6 alkylamino-C1-4 alkylenyl; and Y2 is selected from the group consisting of mono-N-C1-6 alkylamino, di-N, N-C1-6 alky lamino, morpholin-4-yl, piperidin-1-yl, pyrrolidin-1-yl, and 4-Ci-4 alky lpiperazin- 1 -yl .
For certain embodiments, including any one of the above embodiments of Formula VII, G is selected from the group consisting of -C(O)-R", α-aminoacyl, and -C(O)-O-R".
For certain embodiments, including any one of the above embodiments of Formula VII, G is selected from the group consisting of -C(O)-R", α-amino-C2-11 acyl, and -C(O)-O-R". α-Amino-C2.π acyl includes α-amino acids containing a total of at least 2 carbon atoms and a total of up to 11 carbon atoms, and may also include one or more heteroatoms selected from the group consisting of O, S, and N. For certain of these embodiments, R" contains one to ten carbon atoms. For certain embodiments, including any one of the above embodiments which include an α-aminoacyl group, α-aminoacyl is an α-aminoacyl group derived from a naturally occuring α-amino acid selected from the group consisting of racemic, D-, and L- amino acids. For certain embodiments, including any one of the above embodiments which include an α-aminoacyl group, α-aminoacyl is an α-aminoacyl group derived from an α- amino acid found in proteins, wherein the the α-amino acid is selected from the group consisting of racemic, D-, and L-amino acids.
In certain embodiments, Q is selected from the group consisting of a bond, -C(R6)-, -C(Rg)-C(R6)-, -S(O)2-, -C(R6)-N(R8)-W-, -S(O)2-N(R8)-, -C(Re)-O-, -C(R6)S-, and -C(Rs)-N(OR9)-.
In certain embodiments, Q is selected from the group consisting of a bond, -C(O)-, -S(O)2-, and -C(Re)-N(R*)-.
In certain embodiments, Q is -C(O)-. In certain embodiments, V is selected from the group consisting of -C(R6)-,
-0-C(R6)-, -N(R8)-C(R6)-, and -S(O)2-.
In certain embodiments, V is selected from the group consisting of -C(O)- and -N(Rs)-C(O)-.
In certain embodiments, V is -C(O)-. In certain embodiments, W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-.
In certain embodiments, W is a bond.
For certain embodiments, X is selected from the group consisting of a bond, C1-4 alkylene and C2-4 alkenylene. For certain embodiments, X is a bond or C1-4 alkylene.
For certain embodiments, X is a bond, methylene, or ethylene.
In certain embodiments, X1 is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups.
In certain embodiments, X' is alkylene.
In certain embodiments, X' is phenylene. In certain embodiments, Y is selected from the group consisting of a bond,
-C(R6)-, -S(O)2-, -S(O)2-N(R8)-,
Figure imgf000048_0001
, -C(O)-O-, -C(Rg)-N(R8)-,
Figure imgf000048_0002
-C(O)-N(Rs)-S(O)2-, -C(Re)-N(Rs)-C(O)-, ^- Ri° , -C(O)-C(O)-,
-C(O)-C(O)-O-, and -C(=NH)-N(R8)-. In certain embodiments, Y is selected from the group consisting of -C(O)-, -S(O)2-,
-S(O)2-N(R8)-, -C(O)-O-, and -C(O)-N(R8)-.
In certain embodiments, Y is selected from the group consisting of -C(O)-, -S(O)2-, and -C(O)-N(H)-.
In certain embodiments, Y is a bond. In certain embodiments, Y' is selected from the group consisting of -0-, -S(O)0-2-,
-S(O)2-N(R8)-, -C(R6)-, -C(R6)-O-, -0-C(R6)-, -0-C(O)-O-, -N(Rg)-Q-, -C(Re)-N(R8)-, -0-C(Re)-N(R8)-, -C(R6)-N(OR9)-, -0-N(Re)-Q-, -0-N=C(R4)-, -C(^=N-O-R8)-, -N-C(Re) -N-W- -N- R7-N-Q-
-CH(-N(-0-Rβ)-Q-R4)-,
Figure imgf000048_0003
Rv
Figure imgf000048_0004
In certain embodiments, Y1 is -N(Rg)-C(O)-, -N(Rg)-S(O)2-, -N(Rg)-C(O)-N(R8)-,
Figure imgf000048_0005
In certain embodiments, Z' is a bond or -O- . In certain embodiments, Z' is a bond. In certain embodiments, Z' is -0-. In certain embodiments, a and b are independently integers from 1 to 6 with the proviso that a + b is < 7.
In certain embodiments, a and b are each 2.
In certain embodiments, n is an integer form O to 4. In certain embodiments, n is O or 1.
In certain embodiments, n is 0.
In certain embodiments, p is an integer form 0 to 3.
In certain embodiments, p is 0 or 1. In certain embodiments, p is 0.
In certain embodiments, m is 0 or 1; with the proviso that when m is 1, then n is 0 or l.
In certain embodiments, m is 0 or 1; with the proviso that when m is 1, then p is 0 or l. In certain embodiments, m is 0.
In certain embodiments, m is 1.
For certain embodiments, the present invention provides a pharmaceutical composition comprising a therapeutically effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa, and a pharmaceutically acceptable carrier.
For certain embodiments, the present invention provides a method of inducing cytokine biosynthesis in an animal comprising administering an effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa, or a pharmaceutical composition comprising an effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa to the animal. For certain of these embodiments, the cytokine is selected from the group consisting of IFN-α, TNF-α, IL-6, IL-10, and IL- 12. For certain of these embodiments, the cytokine is IFN-α or TNF-α. For certain of these embodiments, the cytokine is IFN-α. For certain embodiments, the present invention provides a method of treating a viral disease in an animal comprising administering a therapeutically effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa, or a pharmaceutical composition comprising a therapeutically effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa to the animal.
For certain embodiments, the present invention provides a method of treating a neoplastic disease in an animal comprising administering a therapeutically effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa, or a pharmaceutical composition comprising a therapeutically effective amount of a compound or salt of any one of the above embodiments of Formulas I, II, III, IV, V, VI, VII, and Villa to the animal.
Preparation of the Compounds
Compounds of the invention may be synthesized by synthetic routes that include processes analogous to those well known in the chemical arts, particularly in light of the description contained herein. The starting materials are generally available from commercial sources such as Aldrich Chemicals (Milwaukee, Wisconsin, USA) or are readily prepared using methods well known to those skilled in the art (e.g., prepared by methods generally described in Louis F. Fieser and Mary Fieser, Reagents for Organic Synthesis, v. 1-19, Wiley, New York, (1967-1999 ed.); Alan R. Katritsky, Otto Meth- Cohn, Charles W. Rees, Comprehensive Organic Functional Group Transformations, v. 1- 6, Pergamon Press, Oxford, England, (1995); Barry M. Trost and Ian Fleming,
Comprehensive Organic Synthesis, v. 1-8, Pergamon Press, Oxford, England, (1991); or Beilsteins Handbuch der organischen Chemie, 4, Aufl. Ed. Springer-Verlag, Berlin, Germany, including supplements (also available via the Beilstein online database)).
For illustrative purposes, the reaction schemes depicted below provide potential routes for synthesizing the compounds of the present invention as well as key intermediates. For more detailed description of the individual reaction steps, see the EXAMPLES section below. Those skilled in the art will appreciate that other synthetic routes may be used to synthesize the compounds of the invention. Although specific starting materials and reagents are depicted in the reaction schemes and discussed below, other starting materials and reagents can be easily substituted to provide a variety of derivatives and/or reaction conditions. In addition, many of the compounds prepared by the methods described below can be further modified in light of this disclosure using conventional methods well known to those skilled in the art.
In the preparation of compounds of the invention it may sometimes be necessary to protect a particular functionality while reacting other functional groups on an intermediate. The need for such protection will vary depending on the nature of the particular functional group and the conditions of the reaction step. Suitable amino protecting groups include acetyl, trifluoroacetyl, ført-butoxycarbonyl (Boc), benzyloxycarbonyl, and 9- fluorenylmethoxycarbonyl (Fmoc). Suitable hydroxy protecting groups include acetyl and silyl groups such as the ter t-bntyl dimethylsilyl group. For a general description of protecting groups and their use, see T. W. Greene and P. G. M. Wuts, Protective Groups in Organic Synthesis, John Wiley & Sons, New York, USA, 1991.
Conventional methods and techniques of separation and purification can be used to isolate compounds of the invention, as well as various intermediates related thereto. Such techniques may include, for example, all types of chromatography (high performance liquid chromatography (HPLC), column chromatography using common absorbents such as silica gel, and thin layer chromatography), recrystallization, and differential (i.e., liquid- liquid) extraction techniques.
Compounds of the invention can be prepared according to Reaction Scheme I where R, R1, R2-2, R2-3, X, Y, and n are as defined above, and Hal is chloro, bromo, or iodo. In step (1) of Reaction Scheme I, a quinoline-3,4-diamine of Formula X is reacted with a carboxylic acid equivalent, which is selected such that it will provide the desired - X-CH2-HaI substituent in a l//-imidazo[4,5-c]quinoline of Formula XI. Suitable carboxylic acid equivalents include ortho esters, acid halides, and imidates or salts thereof. Many compounds of Formula X are known and can be readily prepared using known synthetic routes; see for example, U.S. Patent Nos. 4,689,338 (Gerster), 4,929,624 (Gerster et al.), 5,268,376 (Gerster), 5,389,640 (Gerster et al.), 6,331,539 (Crooks et al), 6,451,810 (Coleman et al.), 6,541,485 (Crooks et al.), 6,660,747 (Crooks et al.), 6,670,372 (Charles et al.), 6,683,088 (Crooks et al.), 6,656,938 (Crooks et al.), 6,664,264 (Dellaria et al.), 6,677,349 (Griesgraber); and U.S. Patent Publication Application No. US 2004/0147543 (Hays et al.). When the carboxylic acid equivalent used in step (1) is an imidate of formula
Hal-CH2-X-C(=NH)-O-alkyl or a salt thereof, the reaction is conveniently carried out by combining a quinoline-3,4-diamine of Formula X with the imidate in a suitable solvent such 1 ,2-dichloroethane or chloroform. The reaction can be carried out at an elevated temperature such as 80 0C or the reflux temperature of the solvent. The product can be isolated by conventional methods. Some imidates of formula Hal-CH2-X-C(=NH)-O- alkyl are known; others can be prepared by known methods. Ethyl chloroacetimidate hydrochloride, which can be used to provide a compound of Formula XI in which X is a bond, is a known compound that can be prepared according to the literature procedure: Stillings, M. R. et al., J Med. Chem., 29, pp. 2280-2284 (1986).
When the carboxylic acid equivalent is an acid halide of formula HaI-CH2-X- C(O)Cl or HaI-CH2-X-C(O)Br, the reaction is conveniently carried out by adding the acid halide to a solution of a quinoline-3,4-diamine of Formula X in a suitable solvent such as dichloromethane or 1,2-dichloroethane in the presence of a tertiary amine such as triethylamine. The reaction can be carried out at ambient temperature or at a sub-ambient temperature. The product can be isolated by conventional methods.
The reaction with an acid halide of formula HaI-CH2-X-C(O)Cl or HaI-CH2-X-C(O)Br may be carried out in two parts, which include (i) adding the acid halide to a solution of a quinoline-3,4-diamine of Formula X in a suitable solvent such as dichloromethane or 1,2-dichloroethane optionally in the presence of a tertiary amine such as triethylamine to afford an amide intermediate and (ii) cyclizing to provide a IH- imidazo[4,5-c]quinoline of Formula XI. The amide intermediate from part (i) can be optionally isolated using conventional techniques. The cyclization in part (ii) may be carried out by heating the amide intermediate from part (i) in a suitable solvent such as toluene. The cyclization in part (ii) can also be carried out in the presence of a base such as triethylamine.
In step (2) of Reaction Scheme I a lH-imidazo[4,5-c]quinoline of Formula XI is oxidized to provide an iV-oxide of Formula XII using a conventional oxidizing agent that is capable of forming JV-oxides. The reaction can be carried out by treating a solution of a compound of Formula XI in a suitable solvent such as chloroform or dichloromethane with 3-chloroperoxybenzoic acid at room temperature, and the product can be isolated by conventional methods. In step (3) of Reaction Scheme I, -a lH-imidazo[4,5-c]quinoline-5iV-oxide of
Formula XII is animated to provide a lH-imidazo[4,5-c]quinolin-4-amine of Formula XIII. Step (3) involves the activation of an JV-oxide of Formula XII by conversion to an ester and then reacting the ester with an animating agent. Suitable activating agents include alkyl- or arylsulfonyl chlorides such as benzenesulfonyl chloride, methanesulfonyl chloride, orp-toluenesulfonyl chloride. Suitable aminating agents include ammonia, in the form of ammonium hydroxide, for example, and ammonium salts such as ammonium carbonate, ammonium bicarbonate, and ammonium phosphate. The reaction is conveniently carried out by adding ammonium hydroxide to a solution of the iV-oxide of Formula XII in a suitable solvent such as dichloromethane or chloroform and then adding /7-toluenesulfonyl chloride. The reaction can be carried out at room temperature, and the product or a pharmaceutically acceptable salt thereof can be isolated from the reaction mixture using conventional methods.
Alternatively, the oxidation and animation can be carried out as a one-pot procedure without isolating the JV-oxide of Formula XII by adding 3-chloroperoxybenzoic acid to a solution of a compound of Formula XI in a solvent such as dichloromethane or chloroform and then adding ammonium hydroxide and/>-toluenesulfonyl chloride. The product of Formula XIII or a pharmaceutically acceptable salt thereof can be isolated by conventional methods. Some compounds of Formula XIII are known, see for example, International Publication Nos. WO2005/048933 and WO2005/048945.
In step (4) of Reaction Scheme I, the Hal group of a lif-imidazo[4,5-c]quinolin-4- amine of Formula XIII is displaced with a hydroxylamine of formula HN(Y-R2-3)OR2-2 or a salt thereof. The reaction is conveniently carried out by combining a hydroxylamine salt of the formula HN(Y-R2-3)OR2.2»HC1 with a compound of Formula XIII in a suitable solvent, such as ΛζiV-dimethylformamide (DMF), in the presence of a base such as triethylamine. The reaction can be carried out at room temperature or at an elevated temperature such as 50 0C. Some hydroxylamine salts of the formula HN(Y-R2-3)OR2-2»HC1 can be obtained commercially. For example N, O- dimethylhydroxylamine hydrochloride, methoxylamine hydrochloride, and N- methylhydroxylamine hydrochloride are commercially available compounds that can be used to make preferred compounds of Formula XIV, wherein Y is a bond. Other hydroxylamine salts of the formula HN(Y-R2-3)OR2-2»HC1 can be prepared using conventional synthetic methods. The product of Formula XIV, a subgenus of Formulas I and III, or a pharmaceutically acceptable salt thereof can be isolated using conventional methods. Reaction Scheme I
Figure imgf000054_0001
Compounds of the invention can be prepared according to Reaction Scheme II where R, R1, R2-I, R2-2, R2-3, X, Y, and n are as defined above, and P is a hydroxy protecting group. In step (1) of Reaction Scheme II, a compound of Formula X or a salt thereof is reacted with a carboxylic acid or an equivalent thereof to provide a compound of Formula XV. Suitable equivalents to carboxylic acid include acid anhydrides of Formula 0[C(O)-X-CH2-O-P]2 and acid chlorides of Formula Cl-C(O)-X-CH2-O-P. The reaction is conveniently carried out by using the conditions described in step (1) of Reaction Scheme I for the reaction with acid chlorides. Some compounds of Formula Cl-C(O)-X-O-P, such as acetoxyacetyl chloride, methoxyacetyl chloride, and 2-methoxypropionyl chloride, are commercially available. Others can be prepared by known synthetic methods.
In step (2) of Reaction Scheme II, the protecting group of a l/f-imidazo[4,5- c]quinoline of Formula XV is removed to provide a hydroxyalkyl-substituted IH- imidazo[4,5-c]quinoline of Formula XVI. The deprotection can be carried out using a variety of methods depending on which P group is present. When P is -C(O)-CH3, the reaction is conveniently carried out by adding lithium hydroxide monohydrate to a solution or suspension of the compound of Formula XV in a suitable solvent or solvent system such as tetrahydrofuran:methanol:water. The reaction can be carried out at room temperature, and the product can be isolated by conventional methods.
In step (3) of Reaction Scheme II, a hydroxyalkyl-substituted lH-imidazo[4,5- c]quinoline of Formula XVI is oxidized to an aldehyde-substituted lH-imidazo[4,5- c]quinoline of Formula XVII using one of many conventional methods. The oxidation is conveniently carried out by adding Dess-Martin periodinane, [l,l,l-tris(acetyloxy)-l,l- dihydro-l,2-benziodoxol-3(lH)-one], to a solution or suspension of a hydroxyalkyl- substituted lH-imidazo[4,5-c]quinoline of Formula XVI in a suitable solvent such as dichloromethane. The reaction can be carried out at room temperature, and the product can be isolated by conventional methods.
Alternatively, certain aldehyde-substituted lH-imidazo[4,5-c]quinolines of Formula XVII in which X is a bond can be prepared from lH-imidazo[4,5-c]quinolines with a hydrogen at the 2-position, many of which are known; see, for example, U.S. Patent Nos. 4,689,338 (Gerster) and 5,268,376 (Gerster). The hydrogen at the 2-position of a lH-imidazo[4,5-c]quinoline may undergo lithiation with butyllithium, and subsequent substitution with DMF provides a compound of Formula XVII in which X is a bond. The reaction is conveniently carried out in a suitable solvent such as THF at a subambient temperature such as —78 0C. The product or a pharmaceutically acceptable salt thereof can be isolated by conventional methods. In step (4) of Reaction Scheme II, an aldehyde-substituted lH-imidazo[4,5- c]quinoline of Formula XVII is converted to an aldoxime of Formula XVIII. The reaction is conveniently carried out by adding a hydroxylamine salt of the formula NH2OR2-2 »HC1, optionally in a suitable solvent such as water, to a solution or suspension of a compound of Formula XVII, in a suitable solvent, such as ethanol or methanol. Optionally a base such as aqueous sodium hydroxide can be added. The reaction can be carried out at room temperature or at an elevated temperature such as the reflux temperature of the solvent. Hydroxylamine salts of the formula NH2OR2-2^HCl can be obtained commercially or they can be prepared using conventional synthetic methods. The product or a pharmaceutically acceptable salt thereof is obtained as a mixture of E and Z isomers and can be isolated using conventional methods.
In steps (5) and (6) of Reaction Scheme II, an aldoxime-substituted IH- imidazo[4,5-c]quinoline of Formula XVIII is first oxidized to an TV-oxide of Formula XIX, which is then animated to provide a compound of Formula XX, which is a subgenus of Formulas I and III. Steps (5) and (6) of Reaction Scheme II can be carried out according to the methods described in steps (2) and (3) of Reaction Scheme I, and the product can be isolated by conventional methods. In step (7) of Reaction Scheme II, an aldoxime-substituted lH-imidazo[4,5- c]quinolin-4-amine of Formula XX is treated with a Grignard reagent of the formula R^MgHalide to form a hydroxylamine of Formula XXI5 a subgenus of Formulas I and III. Several Grignard reagents are commercially available; others can be prepared using known synthetic methods. The reaction is conveniently carried out by adding a solution of two equivalents of the Grignard reagent to a solution of the compound of Formula XX in a suitable solvent such as THF. The reaction can be carried out at room temperature, and the product can be isolated using conventional methods. Alternatively, to prepare a compound of Formula XXI wherein R2-I is hydrogen, an oxime of Formula XX can be treated with a hydride reducing agent. The reduction is conveniently carried out by treating an oxime of Formula XX with excess sodium cyanoborohydride in a suitable solvent or solvent mixture such as methanol/acetic acid. The reaction can be carried out at ambient temperature. The product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods. In step (8) of Reaction Scheme II, a hydroxylamine of Formula XXI is converted to a compound of Formula XXII, a subgenus of Formulas I and III. Step (8) is carried out using conventional methods. For example, sulfonamides of Formula XXII (Y is -S(O)2-) can be prepared by reacting a compound of Formula XXI with a sulfonyl chloride of formula R2-3S(O)2Cl or a sulfonic anhydride of Formula [R2-3S(O)2J2O. The reaction can be carried out at room temperature in an inert solvent such as chloroform, dichloromethane, or ΛζiV-dimethylacetamide (DMA) by adding the sulfonyl chloride or sulfonic anhydride to a compound of Formula XXI in the presence of a base such as N,N- diisopropylethylamine, triethylamine, or pyridine.
Figure imgf000056_0001
Sulfamides of Formula XXII (Y is -S(O)2-N(R8)- or ^ R'° ) can be prepared by reacting a compound of Formula XXI with sulfuryl chloride to generate a sulfamoyl chloride in situ, and then reacting the sulfamoyl chloride with an amine of
formula HN(R8)R2-3, or
Figure imgf000056_0002
, or by reacting a compound of Formula XXI with a
Cl- S(O)2-N^) — R^3 sulfamoyl chloride of formula R2-3(R8)NS(O)2Cl or ^-Rio . The product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods. Many sulfonyl chlorides of formula R2-3S(O)2Cl, amines of formulas HN(R8)R2-3, and
Figure imgf000057_0001
, and some sulfamoyl chlorides of formulas R2-3(R8)NS(O)2Cl and
Cl- S(O)2- N^ — R2-3
Rio are commercially available; others can be prepared using known synthetic methods. Amides of Formula XXII (Y is -C(O)-) can be prepared from hydroxylamines of
Formula XXI using conventional methods. For example, a compound of Formula XXI can be reacted with an acid chloride of formula R2-3C(O)Cl. The reaction can be carried out by adding the acid chloride to a solution of a compound of Formula XXI in a suitable solvent such as chloroform or DMA, optionally in the presence of a base such as N,N- diisopropylethylamine, triethylamine, or pyridine, at ambient temperature. The product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods. Ureas and thioureas of Formula XXII (Y is -C(O)-N(R8)-, -C(S)-N(R8)-,
-C(O)-N^ — -C(O)-N(Rs)-S(O)2-, -C(O)-N(Rg)-C(O)-, -C(S)-N(R8)-C(O)-, or ^ R'° ) can be prepared from hydroxylamines of Formula XXI using conventional methods. For example, a compound of Formula XXI can be reacted with an isocyanate of formula
R2-3N=C=O. The reaction can be carried out by adding the isocyanate to a solution of a compound of Formula XXI in a suitable solvent such as chloroform or DMA, optionally in the presence of a base such as N,N-diisopropylethylamine, or triethylamine, at room temperature. Alternatively, a compound of Formula XXI can be reacted with a thioisocyanate of formula R2-3N=C=S, a sulfonyl isocyanate of formula R2-3S(O)2N=C=O or a carbamoyl chloride of formula R2-3NC(O)Cl or
Cl- C(O)-N^ — R2-3
Rio . The product or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
Reaction Scheme II can be modified after step (3) to introduce a R2-4 group that is other than hydrogen. In this modification, an aldehyde-substituted lH-imidazo[4,5- c]quinoline of Formula XVII is treated with a Grignard reagent of the formula R2- 4MgHalide, which adds to the aldehyde to form a secondary alcohol. Several Grignard reagents are commercially available; others can be prepared using known synthetic methods. The reaction is conveniently carried out by adding a solution of the Grignard reagent to a solution of the compound of Formula XVII in a suitable solvent such as THF. The reaction can be carried out at room temperature, and the product can be isolated using conventional methods. The secondary alcohol is then oxidized to a ketone using conventional methods. The reaction is conveniently carried out using Dess-Martin periodinane under the conditions described in step (3) of Reaction Scheme II. The reaction may also be carried out under Swern conditions by adding the secondary alcohol followed by triethylamine to a mixture of oxalyl chloride and dimethylsulfoxide in a suitable solvent such as dichloromethane. The reaction can be carried out at a sub-ambient temperature, and the product can be isolated by conventional methods. Steps (4) through (8) of Reaction Scheme II can then be carried out to provide a hydroxylamine of the invention with an R2-4 group that is other than hydrogen.
Reaction Scheme II
Figure imgf000058_0001
Compounds of the invention can be prepared according to Reaction Scheme III, wherein R, R1, R2-1, R2-2, X, and n are as defined above. In step (1) of Reaction Scheme III, a quinoline-3,4-diamine of Formula X is reacted with a ketal-substituted carboxylic acid or equivalent thereof of the formula
Figure imgf000059_0001
, wherein D can be -OH, -Cl, Br, or a leaving group prepared using conventional hydroxy activation chemistry, such as employing iV-hydroxysuccinimide as an activating agent. Ketals of this formula are readily prepared from esters of formula alkyl-O-C(O)-X-C(O)-R2-1 using conventional methods. For example, the ketone can be converted to a ketal by heating with ethylene glycol in the presence of pyridinium p-toluenesulfonate in a suitable solvent such as toluene. The carboxyl group can then be activated by first hydrolyzing the ester under basic conditions, for example with sodium hydroxide in water and a lower alcohol, and then reacting with iV-hydroxysuccinimide in the presence of 4-methylmorpholine and l-(3- dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride in a suitable solvent such as dichloromethane. The reaction shown in step (1) of Reaction Scheme III can be carried out according to the methods described for reaction with acid chlorides in step (1) of Reaction Scheme I, or it can be conveniently carried out by heating a quinoline-3,4- diamine of Formula X with a ketal shown above in a suitable solvent such as pyridine. The reaction can be run at the reflux temperature of the solvent, and the product of Formula XXIII can be isolated by conventional methods.
In step (2) of Reaction Scheme III, a lH-imidazo[4,5-c]quinoline of Formula XXIII is converted to the iV-oxide of Formula XXIV using the method described in step (2) of Reaction Scheme I. In step (3) of Reaction Scheme III, the iV-oxide of Formula XXIV is aminated to afford the compound of Formula XXV using one of the methods described in step (3) of Reaction Scheme I.
In step (4) of Reaction Scheme III, a ketal of Formula XXV is converted to a ketone of Formula XXVI by acid-catalyzed hydrolysis. The reaction is conveniently carried out by adding a strong acid, such as hydrochloric acid, to a ketal of Formula XXV. The reaction may be carried out at room temperature in a suitable solvent such as water, and the product can be isolated by conventional methods.
In step (5) of Reaction Scheme III, a ketone-substituted l/f-imidazo[4,5- c]quinolin-4-amine of Formula XXVI is converted to an oxime of Formula XXVII. The reaction is conveniently carried out as described in step (4) of Reaction Scheme II, and the product or a pharmaceutically acceptable salt thereof can be isolated by conventional methods.
Reaction Scheme III
Figure imgf000060_0001
Any of Reaction Schemes I through III may be carried out using a [l,5]naphthyridine-3,4-diamine instead of a quinoline-3,4-diamine of Formula X as the starting material to prepare lH-imidazo[4,5-c] [1 ,5]naphthyridines of the invention. Several [l,5]naphthyridine-3,4-diamines and their preparation are known; see, for example, U.S. Patents Nos. 6,194,425 (Gerster) and 6,518,280 (Gerster).
Compounds of the invention can be prepared according to Reaction Scheme IV, wherein R2-1, and Z are as defined above; Xb is selected from the group consisting of a bond and C1-4 alkylene; Rb is selected from the group consisting of hydroxy, alkyl, alkoxy, -N(R9)2; n is 0 to 4; and R^ is a subset of Ri as defined above that does not include those substituents that one skilled in the art would recognize as being susceptible to reduction under the acidic hydrogenation conditions of the reaction. These susceptible groups include, for example, alkenyl, alkynyl, and aryl groups and groups bearing nitro substituents. Compounds of Formula XXVIII can be prepared by the oxidation and animation of a compound of Formula XVI according to steps (2) and (3) of Reaction
Scheme I. In step (1) of Reaction Scheme IV, a compound of Formula XXVIII is reduced to a 6,7,8,9-tetrahydro compound of Formula XXIX. The reaction is conveniently carried out under hetereogeneous hydrogenation conditions by adding platinum (IV) oxide to a solution of the compound of Formula XXVIII in trifluoroacetic acid and placing the reaction under hydrogen pressure. The reaction can be carried out on a Parr apparatus at room temperature. The product or a pharmaceutically acceptable salt thereof can be isolated by conventional methods. Steps (2) through (6) of Reaction Scheme IV can then be used to convert a compound of Formula XXIX to a compound of Formula IVb, a subgenus of Formulas I and IV. Steps (2) through (6) can be carried out, for example, according to steps (3), (4), (7), and (8) of Reaction Scheme II. Compounds of Formula IVb can also be made by treating a compound of Formula XXIX with thionyl chloride under conventional conditions to provide a chloroalkyl-substituted 6,7,8,9-tetrahydro compound, which can then be treated according to step (4) of Reaction Scheme I. The product of Formula IVb or a pharmaceutically acceptable salt thereof can be isolated by conventional methods. 6,7,8,9-Tetrahydro-l//-imidazo[4,5-c][l ,5]naphthyridin-4-amines can also be prepared using this Reaction Scheme.
Reaction Scheme IV
Figure imgf000061_0001
Compounds of the invention can be prepared according to Reaction Scheme V, wherein R, R1, R2-1, X, and Z are as defined above; n is 0 or 1 ; hal is -Br or -I; and R3a and R3b are as defined below. Compounds of Formula XXX, a subgenus of Formulas I and III, can be prepared according to the methods described in Reaction Scheme I, II, or III beginning with a compound of Formula X, wherein one of the R groups is -Br, or -I. These halogen-substituted quinolines are known or can be prepared by known methods; see, for example, U.S. Patent Application Publication No. US 2004/0147543 (Hays et al.) and the references cited therein. In step (1) of Reaction Scheme V, a halogen-substituted lH-imidazo[4,5- c]quinolin-4-amine of Formula XXX can undergo known palladium-catalyzed coupling reactions such as the Suzuki coupling and the Heck reaction. For example, a halogen- substituted compound of Formula XXX undergoes Suzuki coupling with a boronic acid of Formula R3a-B(OH)2, an anhydride thereof, or a boronic acid ester of Formula R3a-B(O-alkyl)2, wherein R3a is -R4^ -XVJU, -XVY'-JU, or -XVR5; where X'a is alkenylene; X'b is arylene, heteroarylene, and alkenylene interrupted or terminated by arylene or heteroarylene; R4b is aryl or heteroaryl where the aryl or heteroaryl groups can be unsubstituted or substituted as defined in R4 above; and R4, R5, and Y' are as defined above. The Suzuki coupling is conveniently carried out by combining a compound of Formula XXX with a boronic acid or an ester or anhydride thereof in the presence of palladium (II) acetate, triphenylphosphine, and a base such as sodium carbonate in a suitable solvent such as n-propanol or solvent mixture such as rc-propanol/water. The reaction can be carried out at an elevated temperature (e.g., 80-1000C). Many boronic acids of Formula R3a-B(OH)2, anhydrides thereof, and boronic acid esters of Formula
R3a-B(O-alkyl)2 are commercially available; others can be readily prepared using known synthetic methods. See, for example, Li, W. et al, J. Org. Chem., 67, 5394-5397 (2002). The product of Formula IHb5 a subgenus of Formulas I and III, or a pharmaceutically acceptable salt thereof can be isolated by conventional methods. The Heck reaction can also be used in step (1) of Reaction Scheme V to provide compounds of Formula HIb5 wherein R3a is -X'a-R4b or -X'a-Y'-R4, wherein X'a, Y', R4^ and R4 are as defined above. The Heck reaction is carried out by coupling a compound of Formula XXX with a compound of the Formula H2C=C(H)-R4b or H2C=C(H)-Y' -R4. Several of these vinyl-substituted compounds are commercially available; others can be prepared by known methods. The reaction is conveniently carried out by combining the compound of Formula XXX and the vinyl-substituted compound in the presence of palladium (II) acetate, triphenylphosphine or tri-ørt/zø-tolylphosphine, and a base such as triethylamine in a suitable solvent such as acetonitrile or toluene. The reaction can be carried out at an elevated temperature such as 100 °C -120 °C under an inert atmosphere. The product of Formula IHb or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
Compounds of Formula HIb5 wherein R3a is -XO-R4, X'c is alkynylene, and R4 is as defined above, can also be prepared by palladium catalyzed coupling reactions such as the Stille coupling or Sonogashira coupling. These reactions are carried out by coupling a compound of Formula XXX with a compound of the Formula (alky I)3 Sn-C=C-R4, (alkyl)3 Si-C=C-R4, or H-C=C-R4. Some compounds of Formula IHb prepared as described above by palladium- mediated coupling reactions, wherein R33 is -XVR4, -XYY'-R4, -X'b2-Y'~R4, -X'b2-R5> or -XO-R4, where X'b2 is alkenylene interrupted or terminated by arylene or heteroarylene, and X' a, X'o, Y', R4, and R5 are as defined above, can undergo reduction of the alkenylene or alkynylene group present in step (2) of Reaction Scheme V to provide compounds of Formula IHc wherein R3b is -XYR4, -X Y Y' -R45-XYY' -R4, or -XYRs, where X'd is alkylene; X'e is alkylene interrupted or terminated by arylene or heteroarylene; and R4, R5, and Y' are as defined above. The reduction can be carried out by hydrogenation using a conventional heterogeneous hydrogenation catalyst such as palladium on carbon. The reaction can conveniently be carried out on a Parr apparatus in a suitable solvent such as ethanol, methanol, or mixtures thereof. The product of Formula IHc, a subgenus of Formulas I and III, or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
Reaction Scheme V
Figure imgf000063_0001
For some embodiments, compounds of the invention are prepared according to Reaction Scheme VI, where R1, R2-1, R2-2, RAI, RBI, and X are as defined above, and Z3 is -C(R2-4)(-N(-OR2-2)- Y-R2-3)- and Ph is phenyl. Steps (1) through (4) of Reaction Scheme VI can be carried out as described in steps (1) through (4) of Reaction Scheme II starting with a compound of Formula XXXI. Many tetrazolo[l ,5-α]pyridines of Formula XXXI are known; others can be prepared by known methods. See, for example, PCT Publication Nos. WO 2004/110991 (Lindstrom et al), WO 2004/110992 (Lindstrom et al.), and U.S. Patent No. 6,797,718 (Dellaria et al.).
In step (5) of Reaction Scheme VI, the tetrazolo ring is removed from a 7H- imidazo[4,5-c]tetrazolo[l,5-α]pyridine of Formula XXXII by reaction with triphenylphosphine to form an iV-triphenylphosphinyl intermediate of Formula XXXIII. The reaction with triphenylphosphine can be run in a suitable solvent such as toluene or 1,2-dichlorobenzene under an atmosphere of nitrogen with heating, for example at the reflux temperature.
In step (6) of Reaction Scheme VI, an iV-triphenylphosphinyl intermediate of Formula XXXIII is hydrolyzed to provide an oxime-substituted lH-imidazo[4,5-c]pyridin- 4-amine of Formula XXXIV, a subgenus of Formulas I and II. The hydrolysis can be carried out by general methods well known to those skilled in the art, for example, by heating in a lower alkanol or an alkanol/water solution in the presence of an acid such as trifluoroacetic acid, acetic acid, or hydrochloric acid. The product can be isolated from the reaction mixture using conventional methods as the compound of Formula XXXIV or as a pharmaceutically acceptable salt thereof.
When appropriate, the methods shown in steps (7) and (8) of Reaction Scheme II may be used to convert a compound of Formula XXXIV to a compound of Formula lib using steps (7) and (8) of Reaction Scheme VI. The product or a pharmaceutically acceptable salt thereof can be isolated by conventional methods.
Reaction Scheme VI
Figure imgf000064_0001
Compounds of the invention can be prepared according to Reaction Scheme VII where R1, R2-1, R2-2, R, X, and Za are as defined above; E is carbon (imidazoquinoline ring) or nitrogen (imidazonaphthyridine ring); n is 0 or 1; Bn is benzyl; and R3c is -0-R4, -O-X'-R4, -O-X'-Y'-R^ -O-X'-Y'-X'-Y'-R^ or -O-X'-R5, where R4, X', Y', and R5 are as defined above. In step (1) of Reaction Scheme VII, an aniline or aminopyridine of Formula XXXV is treated with the condensation product generated from 2,2-dimethyl-l,3- dioxane-4,6-dione (Meldrum's acid) and triethyl orthoformate to provide an imine of Formula XXXVI. The reaction is conveniently carried out by adding a solution of an aniline or aminopyridine of Formula XXXV to a heated mixture of Meldrum's acid and triethyl orthoformate and heating the reaction at an elevated temperature. The product can be isolated using conventional methods. Many anilines and aminopyridines of Formula XXXV are commercially available; others can be prepared by known synthetic methods. For example, benzyloxypyridines of Formula XXXV can be prepared using the method of Holladay et al., Biorg. Med. Chem. Lett, 8, pp. 2797-2802, (1998). In step (2) of Reaction Scheme VII, an imine of Formula XXXVI undergoes thermolysis and cyclization to provide a compound of Formula XXXVII. The reaction is conveniently carried out in a medium such as DOWTHERM A heat transfer fluid at a temperature in the range of 200 to 250 0C. The product can be isolated using conventional methods. Isomers of the compound of Formula XXXV or Formula XXXVII, wherein E is nitrogen and at a different position in the ring, can also be synthesized and can be used to prepare compounds of the invention.
In step (3) of Reaction Scheme VII, a compound of Formula XXXVII is nitrated under conventional nitration conditions to provide a compound of Formula XXXVIII. The reaction is conveniently carried out by adding nitric acid to the compound of Formula XXXVII in a suitable solvent such as propionic acid and heating the mixture at an elevated temperature. The product can be isolated using conventional methods.
In step (4) of Reaction Scheme VII, a 3-nitro[l,5]naphthyridin-4-ol or 3- nitroquinolin-4-ol of Formula XXXVIII is chlorinated using conventional chlorination chemistry to provide a 4-chloro-3-nitro[l,5]naphthyridine or 4-chloro-3-nitroquinoline of Formula XXXIX. The reaction is conveniently carried out by treating the compound of Formula XXXVIII with phosphorous oxy chloride in a suitable solvent such as DMF. The reaction can be carried out at ambient temperature or at an elevated temperature such as 100 °C, and the product can be isolated using conventional methods.
In step (5) of Reaction Scheme VII, a 4-chloro-3-nitro[l,5]naphthyridine or 4- chloro-3-nitroquinoline of Formula XXXIX is treated with an amine of Formula R1-NH2 to provide a compound of Formula XL. Several amines of Formula R1-NH2 are commercially available; others can be prepared by known synthetic methods. The reaction is conveniently carried out by adding the amine of Formula R1-NH2 to a solution of the 4- chloro-3-nitro[l,5]naphthyridine or 4-chloro-3-nitroquinoline of Formula XXXIX in a suitable solvent such as dichloromethane in the presence of a tertiary amine such as triethylamine. The reaction can be carried out at ambient temperature or at a sub-ambient temperature such as, for example, 0 0C. The reaction product can be isolated using conventional methods.
In step (6) of Reaction Scheme VII5 a compound of Formula XL is reduced to provide a diamine of Formula XLI. The reaction can be carried out by hydrogenation using a heterogeneous hydrogenation catalyst such as platinum on carbon. The hydrogenation is conveniently carried out in a Parr apparatus in a suitable solvent such as toluene, methanol, acetonitrile, or ethyl acetate. The reaction can be carried out at ambient temperature, and the product can be isolated using conventional methods.
Alternatively, the reduction in step (6) can be carried out using nickel boride, prepared in situ from sodium borohydride and nickel(II) chloride. The reduction is conveniently carried out by adding a solution of a compound of Formula XL in a suitable solvent or solvent mixture such as dichloromethane/methanol to a mixture of excess sodium borohydride and catalytic nickel(II) chloride in methanol. The reaction can be carried out at ambient temperature. The product can be isolated using conventional methods. Steps (7) through (12) of Reaction Scheme VII are analogous to steps (1) through
(6) of Reaction Scheme II and can be carried out using the same methods.
In step (13) of Reaction Scheme VII, the benzyl group in an oxime of Formula XLII is cleaved to provide a hydroxy group. The cleavage is conveniently carried out on a Parr apparatus under hydrogenolysis conditions using a suitable heterogeneous catalyst such as palladium or platinum on carbon in a solvent such as ethanol. Alternatively, the cleavage can be carried out with an acid such as hydrogen bromide in a suitable solvent such as acetic acid at an elevated temperature, such as 65 0C. The product of Formula XLIII, prepared by any of these methods, or a pharmaceutically acceptable salt thereof can be isolated using conventional methods. In step (14) of Reaction Scheme VII, a hydroxy-substituted oxime of Formula
XLIII is converted to a compound of Formula XLIV, a subgenus of Formula I, using a Williamson-type ether synthesis. The reaction is effected by treating a hydroxy- substituted compound of Formula XLIII with an aryl, alkyl, or arylalkylenyl halide of Formula Halide-Rn,, Halide-alkylene-Rj, Halide-alkylene-Y'-R-t, or Halide-alkylene-Rs, where ILjb is as defined above, in the presence of a base. Numerous alkyl, arylalkylenyl, and aryl halides of these formulas are commercially available, including substituted benzyl bromides and chlorides, substituted or unsubstituted alkyl or arylalkylenyl bromides and chlorides, and substituted fluorobenzenes. Other halides of these formulas can be prepared using conventional synthetic methods. The reaction is conveniently carried out by combining an alkyl, arylalkylenyl, or aryl halide with the hydroxy-substituted compound of Formula XLIII in a solvent such as DMF in the presence of a suitable base such as cesium carbonate. Optionally, catalytic tetrabutylammonium bromide can be added. The reaction can be carried out at ambient temperature or at an elevated temperature, for example 65 0C or 85 °C, depending on the reactivity of the halide reagent. Alternatively, step (14) may be carried out using the Ullmann ether synthesis, in which an alkali metal aryloxide prepared from the hydroxy-substituted compound of Formula XLIII reacts with an aryl halide in the presence of copper salts, to provide a compound of Formula XLIV, where R3b is -0-R41,, -0-XV R4, or -O-XVY'-R4, wherein X'f is an arylene or heteroarylene, and R^, is as defined above. Numerous substituted and unsubstituted aryl halides are commercially available; others can be prepared using conventional methods. The product of Formula XLIV, prepared by either of these methods, or a pharmaceutically acceptable salt thereof can be isolated using conventional methods.
When appropriate, the methods shown in steps (7) and (8) of Reaction Scheme II may be used to convert a compound of Formula XLIV to a compound of Formula XLV using steps (15) and (16) of Reaction Scheme VII. The product or pharmaceutically acceptable salt thereof can be isolated by conventional methods.
Reaction Scheme VII
Figure imgf000068_0001
XXXV XXXVI XXXVII
(3)
Figure imgf000068_0002
For some embodiments, naphthyridines of the invention are prepared from tetrazolo compounds of Formulas XLVI and L according to Reaction Schemes VIII and IX, wherein Ri, R2-1, R2-2, R, n, Za, and X are as defined above. Compounds of Formula XLVI and L and synthetic routes to these compounds are known; see, for example, U.S. Patent No. 6, 194,425 (Gerster).
Steps (1) through (4) of Reaction Schemes VIII and IX are analogous to steps (1) through (4) of Reaction Scheme II and can be carried out using the same methods.
The tetrazolo group of a compound of Formula XLVII or LI can then be removed in step (5) of Reaction Scheme IX or X to provide a lH-imidazo[4,5-c]naphthyridin-4- amine of Formula XLVIII or LII, each of which is a subgenus of Formula I. The removal of the tetrazolo group can be carried out as described in steps (5) and (6) of Reaction Scheme VI or by using methods described in U.S. Patent No. 6,194,425 (Gerster). The product or a pharmaceutically acceptable salt thereof can be isolated by conventional methods. When appropriate, the methods shown in steps (7) and (8) of Reaction Scheme II may be used to convert a compound of Formula XLVIII or LII to a compound of Formula XLIX or LIII using steps (6) and (7) of Reaction Scheme VIII or IX, respectively. The product of Formula XLIX or LIII, each of which is a subgenus of Formula I, or a pharmaceutically acceptable salt thereof can be isolated by conventional methods.
Reaction Scheme VIII
Figure imgf000070_0001
XLIX
Reaction Scheme IX
Figure imgf000070_0002
Compounds of the invention can be prepared according to Reaction Scheme X where RA1, RBI, RI, R2-2, R2-3, Y, and P are as defined above and PMB is para- methoxybenzyl.
In step (1) of Reaction Scheme X, a 2,4-dichloro-3-nitropyridine of Formula LIV is reacted with an amine of formula R1-NH2 to provide a 2-chloro-3-nitropyridin-4-amine of Formula LV. The reaction can be carried out using the method described in step (5) of Reaction Scheme VII. Some 2,4-dichloro-3-nitropyridines of Formula LIV are known; others can be prepared using known synthetic methods. See, for example, U.S. Patent No. 6,525,064 (Dellaria) and the references cited therein. In step (2) of Reaction Scheme X, a 2-chloro-3-nitropyridin-4-amine of Formula
LV is reduced to provide a 2-chloropyridine-3,4-diamine of Formula LVI. The reduction can be carried out using the methods described in step (6) of Reaction Scheme VII.
In step (3) of Reaction Scheme X, a 2-chloropyridine-3,4-diamine of Formula LVI is reacted with a carboxylic acid or an equivalent thereof to provide a 4-chloro-lH- imidazo[4,5-c]pyridine of Formula LVII. The reaction can be carried out using the method described in step (1) of Reaction Scheme II.
In step (4) of Reaction Scheme X, the protecting group of a 4-chloro-lH- imidazo[4,5-c]pyridine of Formula LVII is removed to provide a hydroxyalkyl-substituted 4-chloro-lH-imidazo[4,5-c]pyridine of Formula LVIII. The deprotection can be carried out using a variety of methods depending on which P group is present. When P is an ethyl group, the reaction can be carried out by adding a solution of boron tribromide in a suitable solvent to a solution or suspension of a compound of Formula LVII in a suitable solvent such as dichloromethane. The reaction can be carried out at a sub-ambient temperature such as 0 0C. In step (5) of Reaction Scheme X, a 4-chloro~lH-imidazo[4,5-c]pyridine of
Formula LVIII is reacted with 4-methoxybenzylamine to provide an N-(4- methxoybenzyl)-lH-imidazo[4,5-c]pyridin-4-amine of Formula LIX. The reaction can be carried out by combining a compound of Formula LVIII with excess iV-(4- methxoybenzyl)amine and excess pyridine hydrochloride in a suitable solvent such as 2,2,2-trifluoroethanol and heating (150 °C) in a microwave reactor.
In step (6) of Reaction Scheme X, the 4-methoxybenzyl group is removed from an jV-(4-methxoybenzyl)-lH-imidazo[4,5-c]pyridin-4-amine of Formula LIX to provide a lH-imidazo[4,5-c]pyridin-4-amine of Formula LX. The reaction can be carried out by treating a compound of Formula LIX with trifluoroacetic acid at ambient temperature. In step (7) of Reaction Scheme X, a hydroxyalkyl-substituted lH-imidazo[4,5- c]pyridin-4-amine of Formula LX is chlorinated to provide a chloroalkyl-substituted IH- imidazo[4,5-c]pyridin-4-amine of Formula LXI. The reaction can be carried out by treating a solution of a compound of Formula LX in a suitable solvent such as chloroform with thionyl chloride. The reaction can be carried out at an elevated temperature such as the reflux temperature of the solvent.
In step (8) of Reaction Scheme X5 the chloro group of a chloroalkyl-substituted lH-imidazo[4,5-c]pyridin-4-amine of Formula LXI is displaced with a hydroxy lamine of formula HN(Y-R2-3)OR2-2 or a salt thereof to provide a lH-imidazo[4,5-c]pyridin-4-amine of Formula LXII, which is a subgenus of Formulas I and II. The reaction can be carried out using the methods described in step (4) of Reaction Scheme I.
In step (8a) of Reaction Scheme X5 the chloro group of a chloroalkyl-substituted lH-imidazo[4,5 -c]pyridin-4-amine of Formula LXI is displaced with a hydroxylamine of formula H2NOR2-2 or a salt thereof to provide a lH-imidazo[4,5-c]pyridin-4-amine of Formula LXIII, which is a subgenus of Formulas I and II. The reaction can be carried out using the methods described in step (4) of Reaction Scheme I.
In step (9) of Reaction Scheme X5 a lH-imidazo[455-c]pyridin-4-amine of Formula LXIII is further derivatized to provide a lH-imidazo[455-c]pyridin-4-amine of Formula
LXII5 which is a subgenus of Formulas I and II. The reaction can be carried out using the methods described in step (8) of Reaction Scheme II.
Reaction Scheme X
Figure imgf000073_0001
LIV LV LVI
Figure imgf000073_0002
LIX LVIII LVII
(6)
Figure imgf000073_0003
(8a)
Figure imgf000073_0004
For certain embodiments, compounds of the invention can be prepared according to Reaction Scheme XI, wherein RA2, RB2, RI5 R2-i, X5 Z, and G are as defined above. Compounds of Formula Ia can be prepared according to the methods described above. The amino group of a compound of Formula Ia can be converted by conventional methods to a functional group such as an amide, carbamate, urea, amidine, or another hydrolyzable group. A compound of this type can be made by the replacement of a hydrogen atom in an amino group with a group such as -C(O)-R", α-aminoacyl, α-aminoacyl-α-aminoacyl, -C(O)-O-R", -C(0)-N(R"")-R", -C(=NYi)-R", -CH(OH)-C(O)-OYi, -CH(OC1-4 alky I)Y0, -CH2Y2, or -CH(CH3)Y2; wherein R" and R"" are each independently C1-U) alkyl,
C3-7 cycloalkyl, phenyl, or benzyl, each of which may be unsubstituted or substituted by one or more substituents independently selected from the group consisting of halogen, hydroxy, nitro, cyano, carboxy, C1-6 alkyl, C1-4 alkoxy, aryl, heteroaryl, arylC1-4 alkylenyl, heteroarylC1-4 alkylenyl, haloC1-4 alkylenyl, haloCi-4 alkoxy, -0-C(O)-CH3, -C(O)-O-CH3, -C(O)-NH2, -0-CH2-C(O)-NH2, -NH2, and -S(O)2-NH2;, with the proviso that R"" may also be hydrogen; each α-aminoacyl group is independently selected from racemic, D, or L-amino acids; Y1 is hydrogen, Ci-6 alkyl, or benzyl; Y0 is C1-6 alkyl, carboxyC1-6 alkylenyl, aminoCi-4 alkylenyl, mono-N-Ci-6 alkylaminoCM alkylenyl, or di- N1N-C1-6 alkylaminoC1-4 alkylenyl; and Y2 is mono-N-C1-6 alkylamino, di-N, N-C1-6 alkylamino, morpholin-4-yl, piperidin-1-yl, pyrrolidin-1-yl, or
4-C1-4 alkylpiperazin-1-yl. Particularly useful compounds of Formula VII are amides derived from carboxylic acids containing one to ten carbon atoms, amides derived from amino acids, and carbamates containing one to ten carbon atoms. The reaction can be carried out, for example, by combining a compound of Formula Ia with a chloroformate or acid chloride, such as ethyl chloroformate or acetyl chloride, in the presence of a base such as triethylamine in a suitable solvent such as dichloromethane at room temperature.
Reaction Scheme XI
Figure imgf000074_0001
Ia VII
Compounds of the invention can also be prepared using variations of the synthetic routes shown in Reaction Schemes I through X that would be apparent to one of skill in the art. For example, the order of steps may be changed in Reaction Schemes II, III, and VI through IX to prepare compounds of the invention. Compounds of the invention can also be prepared using the synthetic routes described in the EXAMPLES below.
Pharmaceutical Compositions and Biological Activity Pharmaceutical compositions of the invention contain a therapeutically effective amount of a compound or salt described above in combination with a pharmaceutically acceptable carrier.
The terms "a therapeutically effective amount" and "effective amount" mean an amount of the compound or salt sufficient to induce a therapeutic or prophylactic effect, such as cytokine induction, immunoniodulation, antitumor activity, and/or antiviral activity. The exact amount of compound or salt used in a pharmaceutical composition of the invention will vary according to factors known to those of skill in the art, such as the physical and chemical nature of the compound or salt, the nature of the carrier, and the intended dosing regimen. In some embodiments, the compositions of the invention will contain sufficient active ingredient or prodrug to provide a dose of about 100 nanograms per kilogram (ng/kg) to about 50 milligrams per kilogram (mg/kg), preferably about 10 micrograms per kilogram (μg/kg) to about 5 mg/kg, of the compound or salt to the subject.
In other embodiments, the compositions of the invention will contain sufficient active ingredient or prodrug to provide a dose of, for example, from about 0.01 mg/m2 to about 5.0 mg/m2, computed according to the Dubois method, in which the body surface area of a subject (m ) is computed using the subject's body weight: m = (wt kg x height cm0'725) x 0.007184, although in some embodiments the methods may be performed by administering a compound or salt or composition in a dose outside this range. In some of these embodiments, the method includes administering sufficient compound to provide a dose of from about 0.1 mg/m2 to about 2.0 mg/ m2 to the subject, for example, a dose of from about 0.4 mg/m2 to about 1.2 mg/m2.
A variety of dosage forms may be used, such as tablets, lozenges, capsules, parenteral formulations, syrups, creams, ointments, aerosol formulations, transdermal patches, transmucosal patches and the like. These dosage forms can be prepared with conventional pharmaceutically acceptable carriers and additives using conventional methods, which generally include the step of bringing the active ingredient into association with the carrier.
The compounds or salts of the invention can be administered as the single therapeutic agent in the treatment regimen, or the compounds or salts described herein may be administered in combination with one another or with other active agents, including additional immune response modifiers, antivirals, antibiotics, antibodies, proteins, peptides, oligonucleotides, etc.
Compounds or salts of the invention have been shown to induce the production of certain cytokines in experiments performed according to the tests set forth below. These results indicate that the compounds or salts are useful for modulating the immune response in a number of different ways, rendering them useful in the treatment of a variety of disorders.
Cytokines whose production may be induced by the administration of compounds or salts of the invention generally include interferon-α (IFN-α) and tumor necrosis factor-α (TNF-α) as well as certain interleukins (IL). Cytokines whose biosynthesis may be induced by compounds or salts of the invention include IFN-α, TNF-α, IL-I, IL-6, IL-IO and IL- 12, and a variety of other cytokines. Among other effects, these and other cytokines can inhibit virus production and tumor cell growth, making the compounds or salts useful in the treatment of viral diseases and neoplastic diseases. Accordingly, the invention provides a method of inducing cytokine biosynthesis in an animal comprising administering an effective amount of a compound or salt of the invention to the animal.
The animal to which the compound or salt is administered for induction of cytokine biosynthesis may have a disease as described infra, for example a viral disease or a neoplastic disease, and administration of the compound or salt may provide therapeutic treatment. Alternatively, the compound or salt may be administered to the animal prior to the animal acquiring the disease so that administration of the compound or salt may provide a prophylactic treatment.
In addition to the ability to induce the production of cytokines, compounds or salts described herein can affect other aspects of the innate immune response. For example, natural killer cell activity may be stimulated, an effect that may be due to cytokine induction. The compounds or salts may also activate macrophages, which in turn stimulate secretion of nitric oxide and the production of additional cytokines. Further, the compounds or salts may cause proliferation and differentiation of B-lymphocytes.
Compounds or salts described herein can also have an effect on the acquired immune response. For example, the production of the T helper type 1 (THI) cytokine IFN- γ may be induced indirectly and the production of the T helper type 2 (TH2) cytokines IL- 4, IL-5 and IL- 13 may be inhibited upon administration of the compounds or salts.
Whether for prophylaxis or therapeutic treatment of a disease, and whether for effecting innate or acquired immunity, the compound or salt or composition may be administered alone or in combination with one or more active components as in, for example, a vaccine adjuvant. When administered with other components, the compound or salt or composition and other component or components may be administered separately; together but independently such as in a solution; or together and associated with one another such as (a) covalently linked or (b) non-covalently associated, e.g., in a colloidal suspension. Conditions for which compounds or salts or compositions identified herein may be used as treatments include, but are not limited to:
(a) viral diseases such as, for example, diseases resulting from infection by an adenovirus, a herpesvirus (e.g., HSV-I, HSV-II, CMV, or VZV), a poxvirus (e.g., an orthopoxvirus such as variola or vaccinia, or molluscum contagiosum), a picornavirus (e.g., rhinovirus or enterovirus), an orthomyxovirus (e.g., influenzavirus), a paramyxovirus (e.g., parainfluenzavirus, mumps virus, measles virus, and respiratory syncytial virus (RSV)), a coronavirus (e.g., SARS)5 a papovavirus (e.g., papillomaviruses, such as those that cause genital warts, common warts, or plantar warts), a hepadnavirus (e.g., hepatitis B virus), a flavivirus (e.g., hepatitis C virus or Dengue virus), or a retrovirus (e.g., a lentivirus such as HIV);
(b) bacterial diseases such as, for example, diseases resulting from infection by bacteria of, for example, the genus Escherichia, Enterobacter, Salmonella, Staphylococcus, Shigella, Listeria, Aerobacter, Helicobacter, Klebsiella, Proteus, Pseudomonas, Streptococcus, Chlamydia, Mycoplasma, Pneumococcus, Neisseria, Clostridium, Bacillus, Corynebacterium, Mycobacterium, Campylobacter, Vibrio, Serratia, Providencia, Chromobacterium, Brucella, Yersinia, Haemophilus, or Bordetella; (c) other infectious diseases, such as chlamydia, fungal diseases including but not limited to candidiasis, aspergillosis, histoplasmosis, cryptococcal meningitis, or parasitic diseases including but not limited to malaria, Pneumocystis carnii pneumonia, leishmaniasis, cryptosporidiosis, toxoplasmosis, and trypanosome infection; (d) neoplastic diseases, such as intraepithelial neoplasias, cervical dysplasia, actinic keratosis, basal cell carcinoma, squamous cell carcinoma, renal cell carcinoma, Kaposi's sarcoma, melanoma, leukemias including but not limited to acute myeloid leukemia, acute lymphocytic leukemia, chronic myeloid leukemia, chronic lymphocytic leukemia, multiple myeloma, Hodgkin's lymphoma, non-Hodgkin's lymphoma, cutaneous T-cell lymphoma, B-cell lymphoma, and hairy cell leukemia, and other cancers;
(e) TH2-mediated, atopic diseases, such as atopic dermatitis or eczema, eosinophilia, asthma, allergy, allergic rhinitis, and Ommen's syndrome;
(f) certain autoimmune diseases such as systemic lupus erythematosus, essential thrombocythaemia, multiple sclerosis, discoid lupus, alopecia areata; and (g) diseases associated with wound repair such as, for example, inhibition of keloid formation and other types of scarring (e.g., enhancing wound healing, including chronic wounds).
Additionally, a compound or salt identified herein may be useful as a vaccine adjuvant for use in conjunction with any material that raises either humoral and/or cell mediated immune response, such as, for example, live viral, bacterial, or parasitic immunogens; inactivated viral, tumor-derived, protozoal, organism-derived, fungal, or bacterial immunogens; toxoids; toxins; self-antigens; polysaccharides; proteins; glycoproteins; peptides; cellular vaccines; DNA vaccines; autologous vaccines; recombinant proteins; and the like, for use in connection with, for example, BCG, cholera, plague, typhoid, hepatitis A, hepatitis B, hepatitis C, influenza A, influenza B, parainfluenza, polio, rabies, measles, mumps, rubella, yellow fever, tetanus, diphtheria, hemophilus influenza b, tuberculosis, meningococcal and pneumococcal vaccines, adenovirus, HIV, chicken pox, cytomegalovirus, dengue, feline leukemia, fowl plague, HSV-I and HSV-2, hog cholera, Japanese encephalitis, respiratory syncytial virus, rotavirus, papilloma virus, yellow fever, and Alzheimer's Disease.
Compounds or salts identified herein may be particularly helpful in individuals having compromised immune function. For example, compounds or salts may be used for treating the opportunistic infections and tumors that occur after suppression of cell mediated immunity in, for example, transplant patients, cancer patients and HIV patients. Thus, one or more of the above diseases or types of diseases, for example, a viral disease or a neoplastic disease may be treated in an animal in need thereof (having the disease) by administering a therapeutically effective amount of a compound or salt of the invention to the animal.
An animal may also be vaccinated by administering an effective amount of a compound or salt described herein, as a vaccine adjuvant. In one embodiment, there is provided a method of vaccinating an animal comprising administering an effective amount of a compound or salt described herein to the animal as a vaccine adjuvant.
An amount of a compound or salt effective to induce cytokine biosynthesis is an amount sufficient to cause one or more cell types, such as monocytes, macrophages, dendritic cells and B-cells to produce an amount of one or more cytokines such as, for example, IFN-α, TNF-α, IL-I, IL-6, IL-IO and IL- 12 that is increased (induced) over a background level of such cytokines. The precise amount will vary according to factors known in the art but is expected to be a dose of about 100 ng/kg to about 50 mg/kg, preferably about 10 μg/kg to about 5 mg/kg. In other embodiments, the amount is expected to be a dose of, for example, from about 0.01 mg/m2 to about 5.0 mg/m2, (computed according to the Dubois method as described above) although in some embodiments the induction or inhibition of cytokine biosynthesis may be performed by administering a compound or salt in a dose outside this range. In some of these embodiments, the method includes administering sufficient compound or salt or composition to provide a dose of from about 0.1 mg/m2 to about 2.0 mg/ m2 to the subject, for example, a dose of from about 0.4 mg/m2 to about 1.2 mg/m2. The invention also provides a method of treating a viral infection in an animal and a method of treating a neoplastic disease in an animal comprising administering an effective amount of a compound or salt of the invention to the animal. An amount effective to treat or inhibit a viral infection is an amount that will cause a reduction in one or more of the manifestations of viral infection, such as viral lesions, viral load, rate of virus production, and mortality as compared to untreated control animals. The precise amount that is effective for such treatment will vary according to factors known in the art but is expected to be a dose of about 100 ng/kg to about 50 mg/kg, preferably about 10 μg/kg to about 5 mg/kg. An amount of a compound or salt effective to treat a neoplastic condition is an amount that will cause a reduction in tumor size or in the number of tumor foci. Again, the precise amount will vary according to factors known in the art but is expected to be a dose of about 100 ng/kg to about 50 mg/kg, preferably about 10 μg/kg to about 5 mg/kg. In other embodiments, the amount is expected to be a dose of, for example, from about 0.01 mg/m to about 5.0 mg/m , (computed according to the Dubois method as described above) although in some embodiments either of these methods may be performed by administering a compound or salt in a dose outside this range. In some of these embodiments, the method includes administering sufficient compound or salt to provide a dose of from about 0.1 mg/m2 to about 2.0 mg/ m2 to the subject, for example, a dose of from about 0.4 mg/m2 to about 1.2 mg/m2.
In addition to the formulations and uses described specifically herein, other formulations, uses, and administration devices suitable for compounds of the present invention are described in, for example, International Publication Nos. WO 03/077944 and WO 02/036592, U.S. Patent No. 6,245,776, and U.S. Publication Nos. 2003/0139364, 2003/185835, 2004/0258698, 2004/0265351, 2004/076633, and 2005/0009858.
Objects and advantages of this invention are further illustrated by the following examples, but the particular materials and amounts thereof recited in these examples, as well as other conditions and details, should not be construed to unduly limit this invention.
EXAMPLES
Preparation of 2-Chloromethyl- 1 -(2-methylpropyl)- 1 H-imidazo [4,5 -c]quinolin-4-amine
Part A
#-(2-Methylpropyl)quinoline-3,4-diamine (U.S. Patent No. 5,389,640 Example 1, 41 g, 0.190 mol), dichloromethane (550 mL), triethylamine (40 mL, 0.286 mol), and chloroacetyl chloride (16.7 mL, 0.210 mol) were combined and then stirred at ambient temperature over the weekend. The reaction mixture was diluted with 1,2-dichloroethane (75 mL) and then washed with saturated aqueous sodium bicarbonate (3 x 400 mL). The organic layer was dried over magnesium sulfate, filtered through a layer of CELITE filter aid, and then concentrated under reduced pressure to provide 52.81 g of 2-chloromethyl-l- (2-methylpropyl)-lH-imidazo[4,5-c]quinoline as a brown solid. Part B 3-Chloroperoxybenzoic acid (mCPBA) (32.7 g of '77% pure material, 146 mmol) was added over a period of five minutes to a solution of 2-chloromethyl-l-(2- methylpropyl)-lH-imidazo[4,5-c]quinoline (20.0 g, 73.1 mmol) in chloroform (500 mL); the reaction mixture was stirred at ambient temperature for one hour. Ammonium hydroxide (200 mL) was added, and then^»-toluenesulfonyl chloride (16.7 g, 87.7 mmol) was added in portions over a period of 10 minutes. The reaction mixture was stirred at ambient temperature for one hour, and then water (200 mL) was added. The aqueous layer was separated and extracted with dichloromethane (2 x 200 mL). The combined organic fractions were dried over magnesium sulfate, filtered, and concentrated under reduced pressure to provide 32 g of crude product as a tan solid. The crude product was dissolved in dichloromethane (50 mL), and the resulting solution was divided into two portions.
Each portion was purified by column chromatography using a HORIZON HPFC system (an automated, modular high-performance flash purification product available from Biotage, Inc, Charlottesville, Virginia, USA) using a FLASH 651 silica cartridge (also available from Biotage, Inc.) (eluting with ethyl acetate methanol in a gradient from 98:2 to 85:15) to provide 11.24 g of 2-chloromethyl-l-(2-methylpropyl)-lH-imidazo[4,5- c]quinolin-4-amine as a tan solid.
Example 1
1 -(2-Methylpropyl)-2- { [methoxy (methyl)amino] methyl } - 1 H-imidazo [4, 5 -c] quinolin-4- amine
Figure imgf000081_0001
2-Chloromethyl-l-(2-methylpropyl)-lH-imidazo[4,5-c]quinolin-4-amine (0.100 g, 0.346 mmol) and triethylamine (0.105 g, 1.04 mmol) were added to a solution of N1O- dimethylhydroxylamine hydrochloride (0.068 g, 0.69 mmol) in ΛζΛ/-dimethylformamide (DMF) (2 mL). A precipitate formed after the addition of triethylamine. The reaction was heated with stirring for three days at 50 0C, allowed to cool to ambient temperature, and partitioned between ethyl acetate (5 mL) and water (5 mL). The organic fraction was concentrated under reduced pressure to afford a white solid, which was purified by preparative high performance liquid chromatography (prep HPLC) using a Waters
FractionLynx automated purification system. The prep HPLC fractions were analyzed using a Waters LC/TOF-MS, and the appropriate fractions were centrifuge evaporated to provide the trifluoroacetate salt of the desired compound. Reversed phase prep HPLC was performed with non-linear gradient elution from 5-95% B where A is 0.05% trifluoroacetic acid/water and B is 0.05% trifluoroacetic acid/acetonitrile. Fractions were collected by mass-selective triggering. The prep HPLC purification afforded l-(2- methylpropyl)-2- { [methoxy(methyl)amino]methyl} - 1 H-imidazo [4,5 -c]quinolin-4-amine trifluoroacetate.
HRMS (ESI) m/z 314.1974 (M+H).
Example 2 l-(2-Methylpropyl)-2-[(methoxyamino)methyl]-lH-imidazo[4,5-c]quinolin-4-amine
Figure imgf000082_0001
Methoxylamine hydrochloride (145 mg, 1.73 mmol) was added to a solution of 2- chloromethyl-l-(2-methylpropyl)-lH-imidazo[4,5-c]quinolin-4-amine (0.250 g, 0.866 mmol) in DMF (3 mL). A precipitate formed. Triethylamine (0.263 g, 2.60 mmol) was added, and the reaction was heated with stirring overnight at 50 0C, allowed to cool to ambient temperature, and partitioned between ethyl acetate (5 mL) and water (5 mL). The aqueous fraction was extracted twice with ethyl acetate, and the combined organic fractions were dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The crude product was purified by radial chromatography on a silica gel plate (2 mm) (eluting sequentially with 2% and 5% methanol in chloroform). The solid was then purified by prep HPLC as described in Example 1 to provide l-(2-methylpropyl)-2- [(methoxyamino)methyl]-l/f-imidazo[4,5-c]quinolin-4-amine trifluoroacetate. HRMS (ESI) m/z 300.1839 (M+H).
Example 3 2- { [Hydroxy(methyl)aniino]methyl } - 1 -(2-methylpropyl)- 1 H-imidazo [4,5 -c]quinolin-4-
Figure imgf000083_0001
The method described in Example 1 was followed using iV-methylhydroxylamine hydrochloride (0.058 g, 0.69 mmol) in lieu of Λζ Odimethylhydroxylamine hydrochloride. The product was purified by prep HPLC as described in Example 1 to provide 2- { [hydroxy(methyl)amino]methyl }- 1 -(2-methylpropyl)- 1 H-imidazo [4,5 -c]quinolin-4- amine trifluoroacetate. HRMS (ESI) m/z 300.1826 (M+H).
Example 4 4- Amino- 1 -(2-methylpropyl)- 1 H-imidazo [4,5 -c]quinoline-2-carbaldehyde Omethyloxime
Figure imgf000083_0002
Part A
A solution of 1 -(2-methylpropyl)- lH-imidazo[4,5-c]quinoline (U.S. Patent No. 5,175,296 Example 1 Part C, 25.64 g, 113.8 mmol) in tetrahydrofuran (THF) (450 mL) was cooled to -78 0C. Butyllithium (45.5 mL of a 2.5 M solution in hexanes) was added dropwise over a period often minutes, and the resulting solution was stirred for ten minutes. DMF (20.1 mL, 274.4 mmol) was added, and the reaction was allowed to warm to room temperature and stirred for one hour. The THF was then removed under reduced pressure, and the residue was dissolved in ethyl acetate (400 mL). The resulting solution was washed with brine (400 mL), dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The crude product was purified by column chromatography on silica gel (eluting sequentially with 0.5% and 1% methanol in dichloromethane) to provide 10.5 g of l-(2-methylpropyl)-lH-imidazo[4,5-c]quinoline-2-carbaldehyde as a light brown solid. Part B
Methoxylamine hydrochloride (0.659 g, 7.90 mmol) was added to a stirred suspension of l-(2-methylpropyl)-lH-imidazo[4,5-c]quinoline-2-carbaldehyde (1.00 g, 3.95 mmol) in methanol (10 mL), and the reaction was stirred at room temperature overnight. The methanol was removed under reduced pressure, and the residue was diluted with saturated aqueous sodium bicarbonate (50 mL). The resulting mixture was extracted with dichloromethane (3 x 30 mL), and the combined extracts were dried over magnesium sulfate, filtered, and concentrated under reduced pressure to provide 1.16 g of l-(2-methylpropyl)-lH-imidazo[4,5-c]quinoline-2-carbaldehyde O-methyloxime as a pale yellow oil that solidified upon standing. Part C mCPBA (1.75 g of 11% pure material, 7.79 mmol) was added in portions over a period of five minutes to a solution of l-(2-methylpropyl)-l/f-imidazo[4,5-c]quinoline-2- carbaldehyde O-methyloxime (1.1 g, 3.9 mmol) in chloroform (40 mL), and the reaction was stirred at room temperature for one hour. Ammonium hydroxide (20 mL) was added, and the resulting mixture was stirred for five minutes before the addition of p- toluenesulfonyl chloride (0.891 g, 4.68 mmol) in portions. The reaction mixture was stirred at room temperature for 1.5 hours. The aqueous layer was then separated and extracted with dichloromethane (3 x 30 mL). The combined organic fractions were dried over magnesium sulfate, filtered, and concentrated under reduced pressure to provide 2.2 g of crude product as a brown foamy solid. The crude product was dissolved in dichloromethane (15 mL) and purified by chromatography using a HORIZON HPFC system (FLASH 4OM silica cartridge available from Biotage, Inc., eluting with 2% to 7% methanol in ethyl acetate). The resulting product (580 mg) was recrystallized from acetonitrile (10 mL), and the crystals were isolated by filtration, washed with diethyl ether, and dried overnight in a vacuum oven at 65 0C to provide 236 mg of 4-amino-l-(2- methylpropyl)-lH-imidazo[4,5-c]quinoline-2-carbaldehyde O-methyloxime as a brown solid, mp 181-183 0C. Anal. Calcd for C16H19N5O: C, 64.63; H5 6.44; N, 23.55. Found: C, 64.37; H5 6.39; N5 23.57.
Example 5 4-[4-Amino-l-(2-hydroxy-2-methylpropyl)-lH-imidazo[455-c]quinolin-2-yl]butan-2-one
0-methyloxime
Figure imgf000085_0001
Part A
A mixture of ethyl levulinate (58.35 g, 400.0 mmol), ethylene glycol (75.36 g, 1.21 mol), pyrdinium/7-toluenesulfonate (100 mg) and toluene (200 mL) was heated at reflux under a Dean Stark trap. The trap was emptied every 15 minutes during the reaction until approximately 200 mL of reaction volatiles had been removed. The remaining toluene was removed under reduced pressure, and the resulting oil was partitioned between ethyl acetate (200 mL) and water (50 mL). The organic layer was separated and washed sequentially with water (2 x 50 mL), saturated aqueous sodium bicarbonate (50 mL), and brine (50 mL); dried over sodium sulfate, filtered, and concentrated under reduced pressure to provide 68.9 g of ethyl 3-(2-methyl-l,3-dioxolan-2-yl)propanoate as a light yellow oil. Part B A solution of ethyl 3-(2-methyl-l,3-dioxolan-2-yl)propanoate (68.9 g, 366 mmol) in methanol (73 mL) was cooled to approximately 0 0C. A warm solution of sodium hydroxide (14.63 g, 366 mmol) in water (73 mL) was added dropwise over a period of three hours. The reaction was then allowed to warm to room temperature and stirred for 17 hours. The methanol was removed under reduced pressure, and the resulting aqueous solution was diluted with water (400 mL) and washed with ethyl acetate (150 mL). The aqueous solution was then cooled to approximately 0 0C and adjusted to pH 2 with the addition of sulfuric acid (180 mL of 1 M). The resulting mixture was extracted with ethyl acetate (2 x 150 mL), and the combined extracts were washed with brine (50 mL), dried over sodium sulfate, filtered, and concentrated under reduced pressure to provide 38.6 g of 3-(2-methyl-l,3-dioxolan-2-yl)propanoic acid as a light yellow oil. Part C
A solution of 3-(2-methyl-l,3-dioxolan-2-yl)propanoic acid (8.95 g, 55.9 mmol) in dichloromethane (111 niL) was cooled to approximately 0 0C. N-hydroxysuccinimide (7.10 g, 61.5 mmol), 4-methylmorpholine (6.22 g, 61.5 mmol), and l-(3- dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (11.8 g, 61.5 mmol) were sequentially added with stirring. The reaction was then allowed to warm to room temperature, stirred for 17 hours, and partitioned between dichloromethane (150 mL) and water (50 mL). The organic layer was separated; sequentially washed with water (50 mL), saturated aqueous sodium bicarbonate (2 x 50 mL), and brine (50 mL); dried over sodium sulfate; filtered; and concentrated under reduced pressure to provide 13 g of l~{[3-(2- methyl-l,3-dioxolan-2-yl)propanoyl]oxy}pyrrolidine-2,5-dione as a white solid. Part D A solution of 3-amino-4-(2-hydroxy-2-methylpropylamino)quinoline (U.S. Patent
No. 5,389,640, 6.00 g, 26.0 mmol) and l-{[3-(2-methyl-l,3-dioxolan-2- yl)propanoyl]oxy}pyrrolidine-2,5-dione (8.01 g, 31.1 mmol) in pyridine (130 mL) was heated at reflux under a Dean-Stark trap for seven hours, allowed to cool to room temperature, and stirred for 48 hours. The volatiles were removed under reduced pressure, and the residue was dissolved in dichloromethane (200 mL). The resulting solution was washed sequentially with saturated aqueous sodium bicarbonate (2 x 100 mL) and brine (100 mL), dried over sodium sulfate, filtered, and concentrated under reduced pressure. The resulting dark brown oil was purified by column chromatography on silica gel (eluting with dichloromethane and 5% methanol in dichloromethane) to provide 4.5 g of 2-methyl- l-{2-[2-(2-methyl-l,3-dioxolan-2-yl)ethyl]-l//-imidazo[4,5-c]quinolin-l-yl}propan-2-ol. Part E mCPBA (2.2 g of 60% pure material, 7.7 mmol) was added in portions over a period of five minutes to a stirred solution of 2-methyl-l-{2-[2-(2-methyl-l,3-dioxolan-2- yl)ethyl]-lH-imidazo[4,5-c]quinolin-l-yl}propan-2-ol (2.5 g, 7.0 mmol) in chloroform (47 mL), and the reaction was stirred at room temperature for 20 minutes. The reaction mixture was partitioned between dichloromethane (200 mL) and saturated aqueous sodium carbonate (100 mL). The organic layer was separated and washed with saturated aqueous sodium carbonate (100 mL). The combined aqueous fractions were extracted with dichloromethane (50 mL). The combined organic fractions were washed with brine (50 mL), dried over sodium sulfate, filtered, and concentrated under reduced pressure to provide 2-methyl-l-{2-[2-(2-methyl-l,3-dioxolan-2-yl)ethyl]-5-oxido-lH-imidazo[4,5- c]quinolin-l-yl}propan-2-ol as a tan solid. Part F
Ammonium hydroxide (12 mL of 30%) was added to a stirred solution of the material from Part E in dichloromethane (35 mL). j?-Toluenesulfonyl chloride (1.34 g, 7.03 mmol) was added in portions over a period of two minutes with vigorous stirring. The reaction mixture was stirred at room temperature for five hours. A solid was present and was isolated by filtration to provide 2.1 g of white powder, which was recrystallized from ethanol (145 mL). The crystals were isolated by filtration, washed with ethanol, and dried for four hours under vacuum at 65 0C to provide 1.7 g of l-{4-amino-2-[2-(2-methyl- l,3-dioxolan-2-yl)ethyl]-lH-imidazo[4,5-c]quinolin-l-yl}-2-methylpropan-2-ol as a brown solid, mp 231-233 0C.
Anal. Calcd for C20H26N4O3: C, 64.85; H, 7.07; N, 15.12. Found: C, 64.72; H, 7.40; N,
15.05.
Part G
Concentrated hydrochloric acid (0.98 mL) was added dropwise to a stirred suspension of l-{4-amino-2-[2-(2-methyl-l,3-dioxolan-2-yl)ethyl]-lH-imidazo[4,5- c]quinolin-l-yl}-2-methylpropan-2-ol (1.45 g, 3.91 mmol) in water (26 mL), and the resulting solution was stirred at room temperature for two hours and then adjusted to pΗ 11 with the addition of aqueous sodium hydroxide (20% w/w). A precipitate formed, and the suspension was stirred for several minutes. The precipitate was isolated by filtration and washed with water to provide 1.2 g of 4-[4-amino-l-(2-hydroxy-2-methylpropyl)-lH- imidazo[4,5-c]quinolin-2-yl]butan-2-one as a white powder. Part Η
Methoxylamine hydrochloride (0.26 g, 3.1 mmol) was added to a stirred solution of 4-[4-amino-l-(2-hydroxy-2-methylpropyl)-l/f-imidazo[4,5-c]quinolin-2-yl]butan-2-one (0.600 g, 1.84 mmol) in pyridine (9 mL), and the reaction was stirred at room temperature for 45 minutes. Water (50 mL) was added. The aqueous layer was separated, extracted with dichloromethane (2 x 50 mL), adjusted to pΗ 10 with the addition of saturated aqueous sodium carbonate, and extracted with dichloromethane (2 x 25 rnL). The combined organic fractions were washed sequentially with saturated aqueous sodium bicarbonate (50 mL) and brine (50 mL), dried over sodium sulfate, filtered, and concentrated under reduced pressure. The resulting white powder was stirred with diethyl ether for one hour, isolated by filtration, and washed with diethyl ether. The resulting solid (0.45 g) was recrystallized from acetonitrile (20 mL), and the crystals were isolated by filtration, washed with acetonitrile, and dried for 15 hours under vacuum at 60 0C to provide 0.40 g of 4-[4-amino-l-(2-hydroxy-2-methylpropyl)-lH-imidazo[4,5-c]quinolin- 2-yl]butan-2-one 0-methyloxime as white needles, mp 182-184 0C. Anal. Calcd for C19H25N5O2: C5 64.20; H, 7.09; N3 19.70. Found: C, 63.97; H, 7.21; N, 19.84.
Example 6
7-(Benzyloxy)-2- [(methoxyamino)methyl] - 1 -(tetrahydro-2H-pyran-4-ylmethyl)- 1 H- imidazo[4,5-c]quinolin-4-amine
Figure imgf000088_0001
Part A l-tetrahydro-2H-pyran-4-ylmethanamine (40 g, 0.347 mol) was added to a stirred solution of 7-(benzyloxy)-4-chloro-3-nitroquinoline (55 g, 0.176 mol) and triethylamine (50.96 g, 0.503 mol) in ΛζiV-dimethylformamide (DMF) (250 mL) at 0° C. After complete addition, the ice bath was removed. To consume the remaining starting material, additional (l-tetrahydro-2i-r-pyran-4-ylmethanamine (11 g, 95.50 mmol) was added. The reaction proceeded at ambient temp for 3 days, then was chilled in an ice-water bath. Water (250 mL) was added drop wise which caused a solid to precipitate out of solution. After stirring for 1 hour, the solid was collected by filtration, washed with diethyl ether
(800 mL), and dried under reduced pressure to afford 7-(benzyloxy)-3-nitro-iV-(tetrahydro- 2H-pyran-4-ylmethyl)quinolin-4-amine (59.3 g) as a bright yellow solid. Part B
A 2L glass parr vessel was charged with of 7-(benzyloxy)-3-nitro-iV-(tetrahydro- 2H-pyran-4-ylmethyl)quinolin-4-amine (59.34 g, 0.151 mol), platinum on carbon (5%, 6.6 g) and acetonitrile (600 mL) to provide a black mixture. The vessel was placed on a shaker and pressurized with hydrogen gas (~50 psi, 3.4 X 105 Pa). After shaking for 18 hours at ambient temperature, the mixture was filtered through CELITE filter agent, and the filter cake washed with acetonitrile. The filtrate was concentrated under reduced pressure to provide 7-(benzyloxy)-iV4-(tetrahydro-2i3/r-pyran-4-ylmethyl)quinoline-3,4- diamine (51.2 g) as a viscous oil. Part C
To a stirred solution of 7-(benzyloxy)-N4-(tetrahydro-2H-pyran-4- ylmethyl)quinoline-3,4-diamine (51.2 g, 0.141 mol) and triethylamine (39.94 g, 0.395 mol) in dichloromethane (410 mL) at 0° C was added a solution of chloroacetyl chloride (8.67 g, 76.80 mmol) in dichloromethane (40 mL) drop wise by addition funnel. The reaction was stirred at ambient temperature for 17 hours then heated to reflux for 6 hours. The crude mixture was cooled to ambient temperature and partitioned between water and dichloromethane (200 mL). The layers were separated and the aqueous layer extracted with dichloromethane (2 x 300 mL). The organic layers were combined, washed with brine (2 x 300 mL), dried over magnesium sulfate, filtered and concentrated under reduced pressure to provide 7-(benzyloxy)-2-(chloromethyl)-l-(tetrahydro-2H-pyran-4-ylmethyl)- lH-imidazo[4,5-c]quinoline (61.7 g) as a brown solid. Part D
3-Chloroperoxybenzoic acid (mCPBA) (1.4 g of 77% pure material, 4.74 mmol) was added over a period of five minutes to a solution of 7-(benzyloxy)-2-(chloromethyl)- l-(tetrahydro-2H"-pyran-4-ylmethyl)-lH-imidazo[4,5-c]quinoline (2.0 g, 4.74 mmol) in chloroform (47 mL); the reaction mixture was stirred at ambient temperature for one hour. The reaction solution was partitioned between chloroform (50 mL) and saturated aqueous sodium carbonate (50 mL). The layers were separated and the aqueous layer extracted with chloroform (50 mL). The organic layers were combined, dried over sodium sulfate, filtered, and concentrated under reduced pressure to afford an oil. To the crude N-oxide dissolved in dichloromethane (24 mL) was added ammonium hydroxide (8 mL), and then /?-toluenesulfonyl chloride (1.0 g, 3.11 mmol) was added in portions over a period of 2 minutes. The reaction mixture was stirred at ambient temperature for one hour, and then saturated aqueous sodium carbonate (50 mL) and chloroform (50 mL) were added. The aqueous layer was separated and extracted with chloroform (50 mL). The combined organic fractions were dried over sodium sulfate, filtered, and concentrated under reduced pressure to provide 2.1 g of crude product as a tan solid. The crude product was purified by column chromatography using a HORIZON HPFC system (an automated, modular high-performance flash purification product available from Biotage, Inc, Charlottesville, Virginia, USA) using a FLASH 40+M silica cartridge (also available from Biotage, Inc.) (eluting with dichloromethane methanol in a gradient from 100:0 to 90: 10) to provide 1.8 g of 7-(benzyloxy)-2-(chloromethyl)- 1 -(tetrahydro-2//-pyran-4-ylmethyl)- 1 H- imidazo[4,5-c]quinolin-4-amine as a tan solid. Part E
7-(Benzyloxy)-2-(chloromethyl)- 1 -(tetrahydro-2H-pyran-4-ylmethyl)- 1 H- imidazo[4,5-c]quinolin-4-amine (2.3 g, 5.26 mmol) and triethylamine (1.6 g, 15.78 mmol) were added to a solution of methoxylamine hydrochloride (0.88 g, 10.52 mmol) in N1N- dimethylformamide (DMF) (11 mL). The reaction was heated with stirring for 40 hours at 50 0C, allowed to cool to ambient temperature, and partitioned between dichloromethane (50 mL) and water (50 mL). The aqueous layer was extracted with another portion of dichloromethane (50 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude material was purified by column chromatography using a HORIZON HPFC system equipped with a FLASH 40+M silica cartridge eluting with dichloromethane :methanol in a gradient from 100:0 to 90:10. The resulting product (1.0 g) was recrystallized from acetonitrile, and the crystals were isolated by filtration, washed with acetonitrile, and dried overnight in a vacuum oven at 65 0C to provide 0.85 g of 7-(benzyloxy)-2-[(methoxyamino)methyl]-l-(tetrahydro-2H- pyran-4-ylmethyl)-lH-imidazo[4,5-c]quinolin-4-amine as a yellow, crystalline solid, mp 190-193 0C. Anal. Calcd for C25H29N5O3: C, 67.09; H, 6.53; N, 15.65. Found: C, 66.88; H, 6.44; N, 15.55. Example 7
7-(Benzyloxy)-2- { [methoxy(methyl)amino]methyl } - 1 -(tetrahydro-2H-pyran-4-ylmethyl)-
1 H-imidazo [4, 5 -c]quinolin-4-amine
Figure imgf000091_0001
7-(Benzyloxy)-2-(chloromethyl)- 1 -(tetrahydro-2H-pyran-4-ylmethyl)- 1 H- imidazo[4,5-c]quinolin-4-amine (0.50 g, 1.14 mmol) and triethylamine (0.34 g, 3.42 mmol) were added to a solution of ΛζO-dimethylhydroxylamine hydrochloride (0.22 g, 2.29 mmol) in JV,iV~dimethylformamide (DMF) (2 mL). The resulting suspension was heated with stirring for 40 hours at 50 0C5 allowed to cool to ambient temperature, and partitioned between dichloromethane (30 mL) and water (20 mL). The aqueous layer was extracted with another portion of dichloromethane (30 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude material was purified by column chromatography using a HORIZON HPFC system equipped with a FLASH 40+M silica cartridge eluting with dichloromethane methanol in a gradient from 100:0 to 90:10. The resulting product (0.3 g) was recrystallized from acetonitrile (3 mL), and the crystals were isolated by filtration, washed with acetonitrile, and dried overnight in a vacuum oven at 65 0C to provide 0.14 g of 7-(benzyloxy)-2- { [methoxy(methyl)amino]methyl } - 1 -(tetrahydro-2//-pyran-4-ylmethyl)- 1 H-imidazo [4,5- c]quinolin-4-amine as a yellow, crystalline solid, mp 159-161 0C. Anal. Calcd for C26H31N5O3«H2O1/4: C, 67.00; H, 6.81; N, 15.03. Found: C, 66.91; H, 6.95; N, 15.08.
Example 8 iV-{[4-Amino-7-(benzyloxy)-l-(tetrahydro-2H-pyran-4-ylmethyl)-lH-imidazo[4,5- c]quinolin-2-yl]methyl} -N-methoxymethanesulfonamide
Figure imgf000092_0001
To a solution of 7-(benzyloxy)-2-(chloromethyl)-l-(tetrahydro-2H-pyran-4- ylmethyl)-lH-imidazo[4,5-c]quinolin-4-amine (0.70 g, 1.56 mmol) and triethylamine (0.30 g, 3.12 mmol) in dichloromethane (6 niL) was added methanesulfonyl chloride (0.20 g, 1.72 mmol) dropwise. The brown solution was stirred at ambient temperature for 18 hours, and then concentrated under reduced pressure. The crude material was purified by column chromatography using a HORIZON HPFC system equipped with a FLASH 25+M silica cartridge eluting with dichloromethane: methanol in a gradient from 100:0 to 90:10. The resulting product (0.35 g) was recrystallized from acetonitrile (43 mL), and the crystals were isolated by filtration, washed with acetonitrile, and dried overnight in a vacuum oven at 65 0C to provide 0.19 g of N-{[4-amino-7-(benzyloxy)-l-(tetrahydro-2H- pyran-4-ylmethyl)- 1 H-imidazo [4,5 -c] quinolin-2-yl]methyl } -N- methoxymethanesulfonamide as a yellow, crystalline solid, mp 195-197 0C. Anal. Calcd for C26H31N5O5S: C, 59.41; H, 5.94; N, 13.32. Found: C, 59.78; H, 5.80; N, 13.61.
Example 9 1 -Isobutyl-2-[(methoxyamino)methyl] -6,7-dimethyl- 1 H-imidazo [4,5 -c]pyridin-4-amine
Figure imgf000092_0002
Part A
A solution of 2,4-dichloro-5,6-dimethyl-3-nitropyridine (40.0 g, 181 mmol), triethylamine (26.5 mL, 190 mmol), and isobutyl amine (18.9 mL, 190 mmol) in N1N- dimethylformamide (500 mL) was stirred at room temperature over night. The solvent was removed under reduced pressure. The residue was dissolved in ethyl acetate (500 mL) and washed with water (3 x 80 mL) and brine (40 niL). The aqueous was extracted with ethyl acetate (3 x 50 mL) and the back-extracts washed with water (3 x 40 mL) and brine (30 mL). The combined organics were dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The crude product was purified by HPFC eluting with a gradient of 10 - 30% ethyl acetate in hexanes to give 25.8 g of 2-chloro-iV-isobutyl- 5,6-dimethyl-3-nitropyridin-4-amine as a yellow oil. Part B
2-Chloro-N-isobutyl-5,6-dimethyl-3-nitropyridin-4-amine (25.8 g, 100 mmol) was combined with 5% platinum on carbon (2.58g) and ethyl acetate (200 mL) in a pressure vessel and hydrogenated at 50 psi (3.4 x 105 Pa) for 2.5 hours on a Parr apparatus. The reaction mixture was filtered through CELITE filter agent, which was rinsed with ethyl acetate and methanol afterwards. The filtrate was concentrated to give 2-chloro-iV4- isobutyl-5,6-dimethylpyridine-3,4-diamine and was used directly in the next step. Part C
Under a nitrogen atmosphere, the material from part B was dissolved in dichloromethane (400 mL) and cooled to 0 0C. Ethoxyacetyl chloride (14.7 g, 120 mmol) dissolved in dichloromethane (100 mL) was added dropwise through an addition funnel and the solution was stirred at room temperature over night. The solvent was removed under reduced pressure and the white solid used directly in the next step. Part D
The material from part C was suspended in ethanol (500 mL), and sodium hydroxide (10.0 g, 250 mmol) was added. The mixture was heated to reflux under a nitrogen atmosphere for four hours. The heat was removed and the solution allowed to stir at room temperature over night. The solvent was removed under reduced pressure and the residue dissolved in dichloromethane (500 mL), washed with water (100 mL) and brine (60 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure to give 29.6 g of 4-chloro-2-(ethoxymethyl)-l-isobutyl-6,7-dimethyl-lH-imidazo[4,5- c]pyridine as a yellow oil. Part E
A 500 mL round bottom flask was charged with 4-chloro-2-(ethoxymethyl)-l- isobutyl-6,7-dimethyl-lH-imidazo[4,5-c]pyridine (10.0 g, 33.8 mmol) and dichloromethane (250 mL) under a nitrogen atmosphere. The solution was cooled to 0 °C and boron tribromide (101 mL of IM in dichloromethane, 101 mmol) was added through an addition funnel over 30 minutes. The reaction mixture was allowed to warm to room temperature and was stirred over night. Methanol was added slowly until no more fizzing occurred, then the solvent was partially removed under reduced pressure. More methanol was added (100 mL) as well as 6N hydrochloric acid (100 mL) and the solution was heated at reflux for 1 hour. The reaction mixture was then allowed to cool to room temperature and stirred over night. The solvent was partially removed under reduced pressure until a solid precipitated, which was isolated by filtration and washed with water, then triturated with ethyl acetate and hexanes to give 6.15 g of (4-chloro- 1 -isobutyl-6,7- dimethyl-lH-imidazo[4,5-c]pyridin-2-yl)methanol as an off-white solid. Part F
A solution of 4-chloro- 1 -isobutyl-6,7-dimethyl- 1 H-imidazo [4,5 ~c]pyridin-2- yl)methanol (1.50 g, 5.60 mmol), 4-methoxybenzylamine (3.66 mL, 28 mmol) and pyridine hydrochloride (1.74 g, 11.2 mmol) in 2,2,2-trifluoroethanol (11.2 mL) was heated to 150 °C in a microwave oven for 2.5 hours. The mixture was allowed to cool to room temperature, then poured into water (75 mL) and stirred for 30 minutes. The precipitate was isolated by filtration and washed with water to give 1.86 g of { l-isobutyl-4-[(4- methoxybenzyl)amino] -6,7-dimethyl- 1 H-imidazo [4, 5 -c]pyridin-2-y 1 } methanol . Part G
{ 1 -Isobutyl-4- [(4-methoxybenzyl)amino] -6,7-dimethyl- 1 H-imidazo [4, 5 -c]pyridin- 2-yl}methanol (3.08 g, 8.36 mmol) was dissolved in trifluoroacetic acid (31 mL) and stirred at room temperature over night. The solvent was removed under reduced pressure and concentrated hydrochloric acid (5 mL) was added. The suspension was stirred for 2 hours, the solid was isolated by filtration and washed with water to give 1.95 g of (4- amino-l-isobutyl-6,7-dimethyl-lH-imidazo[4,5-c]pyridin-2-yl)methanol as a tan powder. Part Η
A solution of (4-amino- 1 -isobutyl-6,7-dimethyl- 1 H-imidazo [4,5 -c]pyridin-2- yl)methanol (1.95 g, 7.85 mmol) and thionyl chloride (1.72 mL, 23.6 mmol) in chloroform (80 mL) was heated at reflux for 2 hours. The solvent was removed under reduced pressure and the residue triturated with chloroform to give 1.53 g of 2-(chloromethyl)-l- isobutyl-6,7-dimethyl-lH-imidazo[4,5-c]pyridin-4-amine hydrochloride as an off-white powder.
Part i
2-(chloromethyl)- 1 -isobutyl-6,7-dimethyl- 1 H-imidazo [4,5 -c]pyridin-4~amine hydrochloride (1.53 g, 5.05 mmol) was dissolved in 10 mL of DMF in a pressure tube under a nitrogen atmosphere. Methoxylamine hydrochloride (1.27 g, 15.15 mmol) and triethylamine (4.22 mL, 30.3 mmol) were added, the tube was sealed and the contents heated to 50 °C for two hours, then to 60 0C for five hours. The mixture was then stored in the refrigerator over the weekend. The contents were poured into water (60 mL) and stirred for 20 minutes. The solution was extracted with chloroform (3 x 70 mL) and the organics were washed with water (4 x 40 mL) and brine (30 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude product was purified by HPFC eluting with a gradient of 0 - 30% CMA (80/18/2 v/v/v chloroform/methanol/concentrated ammonium hydroxide) in chloroform and then recrystallized from acetonitrile to provide 1 -isobutyl-2-[(methoxyamino)methyl]-6,7- dimethyl-lH-imidazo[4,5-c]pyridin-4-amine as a white powder, mp 154.0-156.0 0C. Anal. Calcd for C14H23N5O C, 60.62; H, 8.36; N, 25.25; Found: C, 60.63; H, 8.33; N, 25.35.
Example 10
1 -Isobutyl-2- { [methoxy (methyl)amino]methyl } -6,7-dimethyl- 1 H-imidazo [4, 5 -c]pyridin-
4-amine
Figure imgf000095_0001
l-Isobutyl-2-{[methoxy(methyl)amino]methyl}-6,7-dimethyl-lH-imidazo[4,5- c]pyridin-4-amine was prepared and purified according to the general methods of Example 9 using N,O-dimethyl hydroxylamine hydrochloride in lieu of methoxylamine hydrochloride in Part I. The pure product was obtained as a white powder, mp 132.0- 134.0 0C. Anal. Calcd for Ci5H25N5O C5 61.83; H, 8.65; N, 24.03; Found: C, 61.63; H5 8.88; N5 24.02.
Example 11 N- [(4- Amino- 1 -isobutyl-657-dimethyl- 1 H-imidazo [4, 5 -c]pyridin-2-yl)methyl] -JV- methoxycyclopropanecarboxamide
Figure imgf000096_0001
Under a nitrogen atmosphere, l-isobutyl-2-[(methoxyamino)methyl]-6,7-dimethyl- lH-imidazo[4,5-c]pyridin-4-amine (0.53 g, 1.91 mmol) was dissolved in dichloromethane (19 mL) and cooled to -5 °C. Triethylamine (293 uL, 2.10 mmol) was added followed by drop wise addition of cyclopropane carbonyl chloride (173 uL, 1.91 mmol). The solution was allowed to stir at RT for 2 hours, then cooled back to -5 0C. More triethylamine (38 uL, 0.27 mmol) and cyclopropane carbonyl chloride (23 uL, 0.25 mmol) were added and the reaction was allowed to stir at 0 0C for 45 minutes. More cyclopropane carbonyl chloride (5 uL, 0.06 mmol) was added and stirring continued for another 30 minutes. Dichloromethane (100 mL) was added and the solution was washed successively with saturated aqueous sodium bicarbonate (30 mL), water (3 x 25 mL), and brine (20 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude product was purified by ΗPFC eluting with a gradient of 0 - 35% CMA in chloroform and then recrystallized from ethyl acetate/hexanes to provide 292 mg of pure product as an off- white powder, mp 135.0-137.0 0C. Anal. Calcd for C18H27N5O2 C, 62.59; H, 7.88; N, 20.27; Found: C, 62.68; H, 7.82; N, 19.93.
Example 12
1 -( { 4- Amino-2- [(methoxy amino)methyl] - 1 H-imidazo [4,5 -c]quinolin- 1 - yl}methyl)cyclobutanol
Figure imgf000097_0001
l-({4-Amino-2-[(methoxyamino)methyl]-lH-imidazo[4,5-c]quinolin-l- yl}methyl)cyclobutanol was prepared according to the general methods of Part I of Example 9 using l-{[4-amino-2-(chloromethyl)-lH-imidazo[4,5-c]quinolin-l- yl]methyl}cyclobutanol in lieu of 2-(chloromethyl)-l-isobutyl-6,7-dimethyl-lH- imidazo[4,5-c]pyridin-4-amine hydrochloride. The crude product was purified by ΗPFC eluting with a gradient of 0 - 35% CMA in chloroform and then recrystallized from acetonitrile to provide pure product as a white powder, mp 178.0-181.0 °C. Anal. Calcd for C17H21N5O2 C, 62.37; H, 6.47; N, 21.39; Found: C, 62.35; H, 6.51; N, 21.26.
Example 13
1 - [(4- Amino-2- { [methoxy(methyl)amino]methy 1 } - 1 H-imidazo [4,5 -c] quinolin- 1 - yl)methyl] cyclobutanol
Figure imgf000097_0002
1 - [(4- Amino-2- { [methoxy(methyl)amino]methy 1 } - 1 /f-imidazo [4, 5 -c] quinolin- 1 - yl)methyl]cyclobutanol was prepared according to the general methods of Part I of Example 9 using N,O-dimethyl hydroxylamine hydrochloride in lieu of methoxylamine hydrochloride and using l-{[4-amino-2-(chloromethyl)-lH-imidazo[4,5-c]quinolin-l- yl]methyl}cyclobutanol in lieu of 2-(chloromethyl)-l-isobutyl-6,7-dimethyl-lH- imidazo[4,5-c]pyridin-4-amine hydrochloride. The crude product was purified by ΗPFC eluting with a gradient of 0 — 35% CMA in chloroform and then recrystallized from acetonitrile to provide pure product as a white powder, mp 219.0-221.0 °C. Anal. Calcd for C18H23N5O2 C, 63.32; H, 6.79; N5 20.51; Found: C, 63.12; H, 6.56; N3 20.16. Example 14
4- Amino- 1 -isobutyl-6,7-dimethyl- 1 H-imidazo[4,5 -c]pyridine-2-carbaldehyde O- methyloxime
Figure imgf000098_0001
Part A
Under a nitrogen atmosphere {l-isobutyl-4-[(4-methoxybenzyl)amino]-6,7- dimethyl-lH-imidazo[4,5-c]pyridin-2-yl}methanol (2.00 g, 5.43 mmol, prepared as in Parts A-F of Example 9) was dissolved in dichloromethane (20 mL) and dimethylsulfoxide (10 mL). Triethylamine (2.27 mL, 16.3 mmol) was added and the solution was cooled to 0 0C. Sulfur trioxide pyridine complex (2.60 g, 16.3 mmol) was then added in four portions and the solution was stirred at 0 °C for another 2 hours. The solution was then poured into saturated aqueous ammonium chloride (70 mL) and extracted with diethyl ether (3 x 80 mL). The organics were washed with water (2 x 30 mL) and brine (20 mL), dried over magnesium sulfate, filtered, and concentrated under reduced pressure to give 1.84 g of l-isobutyl-4-[(4-methoxybenzyl)amino]-6,7-dimethyl- l//-imidazo[4,5-c]pyridine-2-carbaldehyde as a yellow residue. Part B
The material from part A was dissolved in methanol (50 mL), and methoxylamine hydrochloride (0.63 g, 7.53 mmol) was added. Sodium hydroxide (1.42 mL of a 6N solution, 8.54 mmol) was added drop wise and the solution was stirred at room temperature over night. Water (40 mL) was added and the solution was extracted with chloroform (3 x 80 mL). The organics were washed with saturated aqueous sodium bicarbonate (2 x 40 mL) and brine (30 mL), dried over magnesium sulfate, filtered, and concentrated under reduced pressure to give 1.90 g of 1 -isobutyl-4-[(4-methoxybenzyl)amino]-6,7-dimethyl- lH-imidazo[4,5-c]pyridine-2-carbaldehyde O-methyloxime as a yellow oil. Part C l-Isobutyl-4-[(4-methoxybenzyl)amino]-6,7-dimethyl-lH-imidazo[4,5-c]pyridine- 2-carbaldehyde <9-methyloxime (1.60 g, 4.05 mmol) was dissolved in trifluoroacetic acid (16 mL) and stirred at room temperature over night. The solvent was removed under reduced pressure and concentrated hydrochloric acid (5 mL) was added. The suspension was stirred for 2 hours, then dichloromethane was added (10 mL) and the solution was cooled to 0 0C. Sodium hydroxide (6N) was added until the solution was basic. More water (20 mL) was added and the solution was extracted with dichloromethane (2 x 100 mL). The organics were washed with brine (30 mL), dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The crude product was purified by HPFC eluting with a gradient of 0 - 30% CMA in chloroform and then recrystallized from dichloromethane/hexanes. The solid was triturated with IN sodium hydroxide to provide 256 mg of pure product as a white powder, mp 179.0-181.0 °C. Anal. Calcd for C14H21N5O C, 61.07; H, 7.69; N, 25.43; Found: C, 61.16; H, 7.64; N, 25.69.
Example 15 l-(2-Hydroxy-2-methylpropyl)-2-{[methoxy(methyl)amino]methyl}-l/f-imidazo[4,5- c]quinolin-4-amine
Figure imgf000099_0001
Triethylamine (0.747 g, 1.03 mL, 7.38 mmol) and N,O-dimethylhydroxylamine hydrochloride (0.480 g, 4.92 mmol) were added to a stirring suspension of 2- chloromethyl-l-(2-hydroxy-2-methylpropyl)-lH-imidazo[4,5-c]quinolin-4-amine (0.750 g, 2.46 mmol) in DMF (5 mL). The resulting suspension was heated to 50 0C and stirred for 17 hours. The reaction mixture was cooled to room temperature and poured into water (100 mL). A solid was removed by filtration and discarded. The filtrate was extracted with ethyl acetate (3 x 100 mL). The combined organic fractions were dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography using a HORIZON HPFC system (silica cartridge, eluting with 5 - 20% methanol in dichloromethane). The resulting oil was crystallized from dichloromethane and isolated by filtration to yield 132 mg of l-(2-Hydroxy-2- methylpropyl)-2-{[methoxy(methyl)amino]methyl}-lH"-imidazo[4,5-c]quinolin-4-amine as a white solid, mp 220-222 0C.
Anal, calcd for Ci7H23N5O2: C, 61.99; H5 7.04; N5 21.26. Found: C, 61.97; H, 7.10; N,
21.38.
Example 16 l-(2-Hydroxy-2-methylpropyl)-2-{[methoxylamino]methyl}-lH-imidazo[4,5-c]quinolin-
4-amine; hydrochloride
Figure imgf000100_0001
Triethylamine (1.49 g, 2.1 mL, 14.8 mmol) and methoxylamine hydrochloride
(0.822 g, 9.84 mmol) were added to a stirring suspension of 2-chloromethyl-l-(2-hydroxy- 2-methylpropyl)-lH-imidazo[4,5-c]quinolin-4-amine (1.50 g, 4.92 mmol) in DMF (10 mL). The resulting suspension was heated to 50 0C and stirred for 17 hours. The reaction mixture was cooled to room temperature and poured into water (20 mL). The aqueous layer was extracted with ethyl acetate (3 x 50 mL) and dichloromethane (3 x 50 mL). A significant amount of the desired product remained in the aqueous layer thus the organic fractions were combined with the aqueous fraction and concentrated under reduced pressure. The residue was purified by column chromatography using a HORIZON HPFC system (silica cartridge, eluting with 10-25% methanol in dichloromethane) and triturated with dichloromethane to provide 760 mg of l-(2-Hydroxy-2-methylpropyl)-2- {[methoxylamino]methyl}-l//-imidazo[4,5-c]quinolin-4-amine; hydrochloride as a tan solid, mp 255-257 0C. Anal, calcd for C16H21N5O2»HC1O.5H2O: C5 53.26; H5 6.42; N, 19.41. Found: C, 53.57; H5 6.43; N5 19.34.
Example 17
2- [(Methoxy amino)methyl] - 1 -(tetrahydro-2H-pyran-4-ylmethyl)- 1 H-imidazo [4,5 - c]quinoline
Figure imgf000101_0001
2-(Chloromethyl)- 1 -(tetrahydro-2H-pyran-4-ylmethyl)- 1 H-imidazo [4,5 - c]quinoline (prepared according to the method described in parts A-C of Example 6 using 4-chloro-3-nitroquinoline in lieu of 7-(benzyloxy)-4-chloro-3-nitroquinoline) was converted to 2- [(methoxyamino)methyl] - 1 -(tetrahydro-2H-pyran-4-ylmethyl)- 1 H- imidazo[4,5-c]quinoline using the method detailed in part E of Example 6. The product was provided as 0.11 g of a light yellow glass, mp 58-63 0C.
Anal, calcd for C18H22N4O2: C, 66.24; H, 6.79; N, 17.17. Found: C, 66.19; H, 6.60; N, 17.06.
Example 18
2- { [Methoxy(methyl)amino]methyl }- 1 -(tetrahydro-2H-pyran-4-ylmethyl)- 1 H- imidazo [4,5 -c] quinoline
Figure imgf000101_0002
2-(Chloromethyl)- 1 -(tetrahydro-2/f-pyran-4-ylmethyl)- 1 H-imidazo [4,5 - c]quinoline (prepared according to the method described in parts A-C of Example 6 using 4-chloro-3-nitroquinoline in lieu of 7-(benzyloxy)-4-chloro-3-nitroquinoline) was converted 2- { [methoxy (methyl)amino]methyl } - 1 -(tetrahydro-2H-pyran-4-ylmethyl)~ 1 H- imidazo [4, 5 -c] quinoline using the method detailed in Example 7. The product was provided as 0.09 g of a white solid, mp 142- 144 0C.
Anal, calcd for C19H24N4O2: C, 67.04; H, 7.11; N, 16.46. Found: C, 67.16; H, 7.17; N5 16.49.
Example 19 2- [(Methoxy amino)methyl] - 1 -(tetrahydro-2//-pyran-4-ylmethyl)- 1 H-imidazo [4,5- c] quinolin-4-amine
Figure imgf000102_0001
2-[(Methoxyamino)methyl] - 1 -(tetrahydro-2H-pyran-4-ylmethyl)- 1 H-imidazo [4,5 ■ c]quinolin-4-amine was prepared according to the methods described in parts A-E of Example 6 using 4-chloro-3-nitroquinoline in lieu of 7-(benzyloxy)-4-chloro-3- nitroquinoline. The product was provided as 0.16 g of a yellow solid, mp 169-171 0C. Anal, calcd for C18H23N5O2: C5 63.32; H, 6.79; N, 20.51. Found: C, 63.48; H, 6.62; N, 20.69.
Example 20 2- { [Methoxy(methyl)amino]methyl} - 1 -(tetrahydro-2/f-pyran-4-ylmethyl)- 1 H- imidazo [4,5 -c] quinolin-4-amine
Figure imgf000102_0002
2-(Chloromethyl)-l-(tetrahydro-2H-pyran-4-ylmethyl)-lH-imidazo[4,5-c]quinolin- 4-amine (prepared according to the method described in parts A-D of Example 6 using 4- chloro-3-nitroquinoline in lieu of 7-(benzyloxy)-4-chloro-3-nitroquinoline) was converted to 2- { [methoxy(methyl)amino]methyl}- 1 -(tetrahydro-2H-pyran-4-ylmethyl)- 1 H- imidazo[4,5-c]quinolin-4-amine using the method detailed in Example 7. The product was provided as 0.16 g of a yellow solid, mp 223-226 0C. Anal, calcd for C19H25N5O2: C, 64.20; H, 7.09; N, 19.70. Found: C, 64.08; H5 7.06; N5 19.74.
Example 21
1 -{4-Amino-7-bromo-2-[(methoxyamino)methyl]- l/i-imidazo[4,5 -c] [1 ,5]naphthyridin- 1 - yl } -2-methylpropan-2-ol
Figure imgf000103_0001
l-{4-Amino-7-bromo-2-[(methoxyamino)methyl]-lH-imidazo[4,5- c][l,5]naphthyridin-l-yl}-2-methylpropan-2-ol was prepared according to the method described in Example 6, parts A-D, using 7-bromo-4-chloro-3-nitro[l,5]naphthyridine and l-amino-2-methylpropan-2-ol in lieu of 7-(benzyloxy)-4-chloro-3-nitroquinoline and 1- tetrahydro-2//-pyran-4-ylmethanamine, respectively. The product was provided as 0.58 g of a yellow solid, mp 167-168 0C.
Anal, calcd for C15H19BrN6O2: C, 45.58; H, 4.85; N, 21.26. Found: C, 45.81; H, 4.72; N, 21.45.
Example 22 l-{4-Amino-2-[(methoxyamino)methyl]-7-(pyridin-3-yl)-l/f-imidazo[4,5- c] [1 ,5]naphthyridin- 1 -yl } -2-methylpropan-2-ol
Figure imgf000103_0002
A stream of nitrogen was bubbled through a stirring suspension of 1 - {4-amino-7- bromo-2- [(methoxyamino)methyl] - 1 H-imidazo [4, 5 -c] [ 1 , 5]naphthyridin- 1 -yl } -2- methylpropan-2-ol (0.590 g, 1.49 mmol), 3-pyridineboronic acid (0.220 g, 1.79 mmol), and potassium carbonate (0.681 g, 4.93 mmol) in ethylene glygol dimethyl ether (10 mL) and water (5 mL) in a pressure vessel for 5 minutes. Dichlorobis(triphenylphosphine)palladium(III) (0.031 g, 0.045 mmol) was added and nitrogen was bubbled through for an additional 5 minutes. The pressure vessel was capped and placed in a HO0C oil bath for 10 minutes. The resulting solution was cooled to ambient temperature and concentrated. The residue was purified by column chromatography using a HORIZON HPFC system (silica cartridge, eluting with 5 - 25% IM ammonia/methanol in dichloromethane). The resulting yellow solid was crystallized from acetonitrile and isolated by filtration to yield 167 mg of l-{4-amino-2- [(methoxyamino)methyl] -7-(pyridin-3 -y I)- 1 H-imidazo [4, 5 -c] [ 1 , 5]naphthyridin- 1 -yl } -2- methylpropan-2-ol as a light yellow solid, mp 195-197 0C. Anal, calcd for C20H23N7O2: C, 61.05; H, 5.89; N, 24.92. Found: C, 60.71; H5 5.91; N, 24.66.
Example 23
1 -(4- Amino-7-bromo-2- { [methoxy(methyl)amino]methyl} - 1 H-mήdazo [4,5 - c] [1 ,5]naphthyridin- 1 -yl)-2-methylpropan-2-ol
Figure imgf000104_0001
1 -(4- Amino-7-bromo-2- { [methoxy(methyl)amino]methyl} - 1 H-imidazo [4,5 - c][l,5]naphthyridin-l-yl)-2-inethylpropan-2-ol was prepared according to the methods described in Example 6 parts A-D (using 7-bromo-4-chloro-3-nitro[l,5]naphthyridine and l-amino-2-methylpropan-2-ol in lieu of 7-(benzyloxy)-4-chloro-3-nitroquinoline and 1- tetrahydro-2H-pyran-4-ylmethanamine, respectively) and Example 7. The product was provided as 0.63 g of a white solid, mp 190-192 0C.
Anal, calcd for C16H21BrN6O2: C, 46.95; H, 5.17; N, 20.53. Found: C, 47.10; H, 4.91; N, 20.70.
Example 24 l-(4-Amino-2-{[methoxy(methyl)amino]methyl}-7-(pyridin-3-yl)-lH'-imidazo[4,5- c][l,5]naphthyridin-l-yl)-2-methylpropan-2-ol
Figure imgf000104_0002
l-(4-Amino-7-bromo-2-{[methoxy(methyl)amino]methyl}-lH"-imidazo[4,5- c][l,5]naphthyridin-l-yl)-2-methylpropan-2-ol was converted to l-(4-amino-2- { [methoxy(methy l)amino]methy 1 } -7-(pyridin-3 -yl)- 1 H-imidazo [4, 5 -c] [ 1 , 5]naphthyridin- l-yl)-2-methylpropan-2-ol according to the method described in Example 22. The product was provided as 0.23g of a tan solid, mp 187-189 0C.
Anal, calcd for C21H25N7O2: C, 61.90; H, 6.18; N, 24.06. Found: C, 62.02; H, 6.14; N, 24.37.
Exemplary Compounds
Certain exemplary compounds, including some of those described above in the Examples, have the following Formulas (Ha, Ilia, IVa, or Va) and the following R1 and R2 substituents, wherein each line of the table is matched with Formula Ha, Ilia, IVa, or Va to represent a specific embodiment of the invention.
Figure imgf000105_0001
Ha Ilia IVa Va
Figure imgf000105_0002
Figure imgf000106_0001
Figure imgf000107_0002
Certain exemplary compounds, including some of those described above in the Examples, have the following Formulas (Ha, Ilia, IVa, or Va) and the following R1 and R2 substituents, wherein each line of the table is matched with Formula Ha, Ilia, IVa, or Va to represent a specific embodiment of the invention.
Figure imgf000107_0001
Figure imgf000107_0003
Figure imgf000108_0001
Figure imgf000109_0002
Certain exemplary compounds, including some of those described above in the Examples, have the following Formulas (HId, or Vd) and the following R1 and R2 substituents, wherein each line of the table is matched with Formula IHd or Vd to represent a specific embodiment of the invention.
Figure imgf000109_0001
IHd Vd
Figure imgf000109_0003
Figure imgf000110_0001
Figure imgf000111_0001
Figure imgf000112_0001
Compounds of the invention have been found to modulate cytokine biosynthesis by inducing the production of interferon α and/or tumor necrosis factor α in human cells when tested using one of the methods described below.
CYTOKINE INDUCTION IN HUMAN CELLS
An in vitro human blood cell system is used to assess cytokine induction. Activity is based on the measurement of interferon (α) and tumor necrosis factor (α) (IFN-α and TNF-α, respectively) secreted into culture media as described by Testerman et al. in "Cytokine Induction by the Immunomodulators Imiquimod and S-27609," Journal of Leukocyte Biology, 58, 365-372 (September, 1995).
Blood Cell Preparation for Culture Whole blood from healthy human donors is collected by venipuncture into vacutainer tubes or syringes containing EDTA. Peripheral blood mononuclear cells (PBMC) are separated from whole blood by density gradient centrifugation using HISTOPAQUE- 1077 (Sigma, St. Louis, MO) or Ficoll-Paque Plus (Amersham Biosciences Piscataway, NJ). Blood is diluted 1 :1 with Dulbecco's Phosphate Buffered Saline (DPBS) or Hank's Balanced Salts Solution (HBSS). Alternately, whole blood is placed in Accuspin (Sigma) or LeucoSep (Greiner Bio-One, Inc., Longwood, FL) centrifuge frit tubes containing density gradient medium. The PBMC layer is collected and washed twice with DPBS or HBSS and re-suspended at 4 x 106 cells/mL in RPMI complete. The PBMC suspension is added to 96 well flat bottom sterile tissue culture plates containing an equal volume of RPMI complete media containing test compound.
Compound Preparation
The compounds are solubilized in dimethyl sulfoxide (DMSO). The DMSO concentration should not exceed a final concentration of 1% for addition to the culture wells. The compounds are generally tested at concentrations ranging from 30-0.014 μM. Controls include cell samples with media only, cell samples with DMSO only (no compound), and cell samples with reference compound.
Incubation The solution of test compound is added at 60 μM to the first well containing RPMI complete and serial 3 fold dilutions are made in the wells. The PBMC suspension is then added to the wells in an equal volume, bringing the test compound concentrations to the desired range (usually 30-0.014 μM). The final concentration of PBMC suspension is 2 x 106 cells/mL. The plates are covered with sterile plastic lids, mixed gently and then incubated for 18 hours to 24 hours at 37°C in a 5% carbon dioxide atmosphere. Separation
Following incubation the plates are centrifuged for 10 minutes at 1000 rpm (approximately 200 x g) at 40C. The cell-free culture supernatant is removed and transferred to sterile polypropylene tubes. Samples are maintained at -30°C to -7O0C until analysis. The samples are analyzed for IFN-α by ELISA and for TNF-α by IGEN/BioVeris Assay.
Interferon (α) and Tumor Necrosis Factor (α) Analysis
IFN-α concentration is determined with a human multi-subtype colorimetric sandwich ELISA (Catalog Number 41105) from PBL Biomedical Laboratories, Piscataway, NJ. Results are expressed in pg/mL.
The TNF-α concentration is determined by ORIGEN M-Series Immunoassay and read on an IGEN M-8 analyzer from BioVeris Corporation, formerly known as IGEN International, Gaithersburg, MD. The immunoassay uses a human TNF-α capture and detection antibody pair (Catalog Numbers AHC3419 and AHC3712) from Biosource International, Camarillo, CA. Results are expressed in pg/mL.
Assay Data and Analysis
In total, the data output of the assay consists of concentration values of TNF-α and IFN-α (y-axis) as a function of compound concentration (x-axis).
Analysis of the data has two steps. First, the greater of the mean DMSO (DMSO control wells) or the experimental background (usually 20 pg/mL for IFN-α and 40 pg/mL for TNF-α) is subtracted from each reading. If any negative values result from background subtraction, the reading is reported as " * ", and is noted as not reliably detectable. In subsequent calculations and statistics, " * ", is treated as a zero. Second, all background subtracted values are multiplied by a single adjustment ratio to decrease experiment to experiment variability. The adjustment ratio is the area of the reference compound in the new experiment divided by the expected area of the reference compound based on the past 61 experiments (unadjusted readings). This results in the scaling of the reading (y-axis) for the new data without changing the shape of the dose-response curve. The reference compound used is 2-[4-amino-2-ethoxymethyl-6,7,8,9-tetrahydro-α,α- dimethyl-lH-imidazo[4,5-c]quinolin-l-yl]ethanol hydrate (U.S. Patent No. 5,352,784; Example 91) and the expected area is the sum of the median dose values from the past 61 experiments.
The minimum effective concentration is calculated based on the background- subtracted, reference-adjusted results for a given experiment and compound. The minimum effective concentration (μmolar) is the lowest of the tested compound concentrations that induces a response over a fixed cytokine concentration for the tested cytokine (usually 20 pg/mL for IFN-α and 40 pg/mL for TNF-α). The maximal response is the maximal amount of cytokine (pg/ml) produced in the dose-response.
CYTOKINE INDUCTION IN HUMAN CELLS
(High Throughput Screen)
The CYTOKINE INDUCTION IN HUMAN CELLS test method described above was modified as follows for high throughput screening.
Blood Cell Preparation for Culture
Whole blood from healthy human donors is collected by venipuncture into vacutainer tubes or syringes containing EDTA. Peripheral blood mononuclear cells (PBMC) are separated from whole blood by density gradient centrifugation using HISTOPAQUE- 1077 (Sigma, St. Louis, MO) or Ficoll-Paque Plus (Amersham Biosciences Piscataway, NJ). Whole blood is placed in Accuspin (Sigma) or LeucoSep (Greiner Bio-One, Inc., Longwood, FL) centrifuge frit tubes containing density gradient medium. The PBMC layer is collected and washed twice with DPBS or HBSS and re- suspended at 4 x 106 cells/mL in RPMI complete (2-fold the final cell density). The PBMC suspension is added to 96-well flat bottom sterile tissue culture plates.
Compound Preparation
The compounds are solubilized in dimethyl sulfoxide (DMSO). The compounds are generally tested at concentrations ranging from 30 - 0.014 μM. Controls include cell samples with media only, cell samples with DMSO only (no compound), and cell samples with a reference compound 2-[4-amino-2-ethoxymethyl-6,7,8,9-tetrahydro-α,α-dimethyl- lH-imidazo[4,5-c]quinolin-l-yl]ethanol hydrate (U.S. Patent No. 5,352,784; Example 91) on each plate. The solution of test compound is added at 7.5 mM to the first well of a dosing plate and serial 3 fold dilutions are made for the 7 subsequent concentrations in DMSO. RPMI Complete media is then added to the test compound dilutions in order to reach a final compound concentration of 2-fold higher (60 - 0.028 μM) than the final tested concentration range.
Incubation
Compound solution is then added to the wells containing the PBMC suspension bringing the test compound concentrations to the desired range (usually 30 μM - 0.014 μM) and the DMSO concentration to 0.4%. The final concentration of PBMC suspension is
2x106 cells/mL. The plates are covered with sterile plastic lids, mixed gently and then incubated for 18 to 24 hours at 370C in a 5% carbon dioxide atmosphere.
Separation Following incubation the plates are centrifuged for 10 minutes at 1000 rpm
(approximately 200 g) at 40C. 4-plex Human Panel MSD MULTI-SPOT 96-well plates are pre-coated with the appropriate capture antibodies by MesoScale Discovery, Inc. (MSD, Gaithersburg, MD). The cell-free culture supernatants are removed and transferred to the MSD plates. Fresh samples are typically tested, although they may be maintained at -30°C to -700C until analysis.
Interferon-α and Tumor Necrosis Factor-α Analysis
MSD MULTI-SPOT plates contain within each well capture antibodies for human TNF-α and human IFN-α that have been pre-coated on specific spots. Each well contains four spots: one human TNF-α capture antibody (MSD) spot, one human IFN- α capture antibody (PBL Biomedical Laboratories, Piscataway, NJ) spot, and two inactive bovine serum albumin spots. The human TNF-α capture and detection antibody pair is from MesoScale Discovery. The human IFN-α multi-subtype antibody (PBL Biomedical Laboratories) captures all IFN-α subtypes except IFN-α F (IFNA21). Standards consist of recombinant human TNF-α (R&D Systems, Minneapolis, MN) and IFN-α (PBL
Biomedical Laboratories). Samples and separate standards are added at the time of analysis to each MSD plate. Two human IFN-α detection antibodies (Cat. Nos. 21112 & 21100, PBL) are used in a two to one ratio (weight: weight) to each other to determine the IFN-α concentrations. The cytokine-specific detection antibodies are labeled with the SULFO-TAG reagent (MSD). After adding the SULFO-TAG labeled detection antibodies to the wells, each well's electrochemoluminescent levels are read using MSD's SECTOR HTS READER. Results are expressed in pg/mL upon calculation with known cytokine standards.
Assay Data and Analysis
In total, the data output of the assay consists of concentration values of TNF-α or IFN-α (y-axis) as a function of compound concentration (x-axis).
A plate-wise scaling is performed within a given experiment aimed at reducing plate-to-plate variability associated within the same experiment. First, the greater of the median DMSO (DMSO control wells) or the experimental background (usually 20 pg/mL for IFN-α and 40 pg/mL for TNF-α) is subtracted from each reading. Negative values that may result from background subtraction are set to zero. Each plate within a given experiment has a reference compound that serves as a control. This control is used to calculate a median expected area under the curve across all plates in the assay. A plate- wise scaling factor is calculated for each plate as a ratio of the area of the reference compound on the particular plate to the median expected area for the entire experiment. The data from each plate are then multiplied by the plate-wise scaling factor for all plates. Only data from plates bearing a scaling factor of between 0.5 and 2.0 (for both cytokines IFN-α, TNF-α) are reported. Data from plates with scaling factors outside the above- mentioned interval are retested until they bear scaling factors inside the above mentioned interval. The above method produces a scaling of the y- values without altering the shape of the curve. The reference compound used is 2-[4-amino-2-ethoxymethyl-6,7,8,9- tetrahydro-α,α-dimethyl-lH-imidazo[4,5-c]quinolin-l-yl]ethanol hydrate (U.S. Patent No. 5,352,784; Example 91). The median expected area is the median area across all plates that are part of a given experiment.
A second scaling may also be performed to reduce inter-experiment variability (across multiple experiments). All background-subtracted values are multiplied by a single adjustment ratio to decrease experiment-to-experiment variability. The adjustment ratio is the area of the reference compound in the new experiment divided by the expected area of the reference compound based on an average of previous experiments (unadjusted readings). This results in the scaling of the reading (y-axis) for the new data without changing the shape of the dose-response curve. The reference compound used is 2-[4- amino-2-ethoxymethyl-6,7,8,9-tetrahydro-α,α-dimethyl-lH-imidazo[4,5-c]quinolin-l- yl]ethanol hydrate (U.S. Patent No. 5,352,784; Example 91) and the expected area is the sum of the median dose values from an average of previous experiments.
The minimum effective concentration is calculated based on the background- subtracted, reference-adjusted results for a given experiment and compound. The minimum effective concentration (μmolar) is the lowest of the tested compound concentrations that induces a response over a fixed cytokine concentration for the tested cytokine (usually 20 pg/mL for IFN-α and 40 pg/mL for TNF-α). The maximal response is the maximal amount of cytokine (pg/ml) produced in the dose-response.
The complete disclosures of the patents, patent documents, and publications cited herein are incorporated by reference in their entirety as if each were individually incorporated. Various modifications and alterations to this invention will become apparent to those skilled in the art without departing from the scope and spirit of this invention. It should be understood that this invention is not intended to be unduly limited by the illustrative embodiments and examples set forth herein and that such examples and embodiments are presented by way of example only with the scope of the invention intended to be limited only by the claims set forth herein as follows.

Claims

WHAT IS CLAIMED IS:
1. A compound of the Formula I :
.
Figure imgf000119_0001
I wherein:
Z is selected from the group consisting of: -C(=N-O-R2-2)- and -C(R2-4)(-N(-OR2-2)-Y-R2-3)-;
X is selected from the group consisting of a bond, Cj-4 alky lene and C2-4 alkenylene;
R2-I, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)0-2-R2-S, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl, -C(O)-N(Rg)2,
Figure imgf000120_0001
-NH-C(O)-NH-R2-5, -NH-C(O)-NH2 -O-(CO)-alkyl, and -C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom; R2-4 is selected from the group consisting of hydrogen, C1-4alkyl, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-, -S(O)2-,
-S(O)2-N(R8)-,
Figure imgf000121_0001
-C(O)-O-,
-C(Re)-N(Re)-,
-C(O)-N(Rs)-S(O)2-,
Figure imgf000121_0002
-C(O)-C(O)-,
-C(O)-C(O)-O-, and
-Ct=NH)-N(Ft8)-; RA and RB are each independently selected from the group consisting of: hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and
-N(Re)2; or when taken together, RA and RB form a fused benzene ring or fused pyridine ring wherein the fused benzene ring or fused pyridine ring is unsubstituted or substituted by one or more R™ groups; or when taken together, RA and RB form a fused cyclohexene ring or a fused tetrahydropyridine ring, wherein the fused cyclohexene or tetrahydropyridine ring is unsubstituted or substituted by one or more R groups;
R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and -N(R9)2;
R' is hydrogen or a non-interfering substituent; R'" is a non-interfering substitutent;
R6 is selected from the group consisting of =0 and =S; Rg is selected from the group consisting of hydrogen, C1-10 alkyl, C2-10 alkenyl, C1-10 alkoxy-C1-10 alkylenyl, hydroxy-CMo alkylenyl, heteroaryl-Q-io alkylenyl, and aryl-C1-10 alkylenyl; Rg is selected from the group consisting of hydrogen and alkyl; and
R10 is C3-8 alkylene; or a pharmaceutically acceptable salt thereof.
2. The compound or salt of claim 1 wherein the one or more R'" groups are one R3 group, or one R3 group and one R group, or one, two, three, or four R groups when on the fused benzene ring, or one, two, or three R groups when on the fused pyridine ring; wherein R3 is selected from the group consisting of:
-z'-m,
-Z'-X'-EU, -Z'-X'-Y'-R,,
-Z'-X'-Y'-X'-Y'-Ri, and -Z1OC-R5;
X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of: -O-,
-S(O)0-2-, -S(O)2-N(R8)-,
-C(R6)-, -C(Re)-O-, -0-C(R6)-, -0-C(O)-O-, -N(R8)-Q-, -C(R6)-N(R8)-, -O-C(R6)-N(R8)-5
-C(Re)-N(OR9)-, -O-N(R8)-Q-, -0-N=C(R4)-, -CC=N-O-R8)-, -CHC-NC-O-Rg)-Q-R4)-,
Figure imgf000123_0001
Z' is a bond or -0-;
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino, (dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
Figure imgf000124_0001
R6 is selected from the group consisting of =0 and =S; R7 is C2-7 alkylene;
R8 is selected from the group consisting of hydrogen, C1-10 alkyl, C2-I0 alkenyl, C1-10 alkoxy-C1-10 alkylenyl, hydroxy-C1-10 alkylenyl, heteroaryl-C]-10 alkylenyl, and aryl-Cj-K) alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl;
R10 is C3-8 alkylene;
A is selected from the group consisting of -O-, -C(O)-, -S(O)0-2-, -CH2-, and -NC-Q-R4)-;
A1 is selected from the group consisting of -0-, -S(O)0-2-, -NC-Q-R4)-, and -CH2-;
Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-, -S(O)2-, -C(Re)-N(Rg)-W-, -S(O)2-N(R8)-, -C(Re)-O-, -C(Rg)-S-, and -C(Re)-N(OR9)-;
V is selected from the group consisting Of-C(R6)-, -0-C(R6)-, -N(Rs)-C(R6)-, and -S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7.
3. The compound or salt of claim 1 or claim 2, wherein R is R1; wherein R1 is selected from the group consisting of:
-R4, -X'-R4, -3C-V-R4, -X'- V-X-Y-R4, and
-X'-R5; wherein:
X1 is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of:
-O-, -S(O)0-2-,
-S(O)2-N(R8)-, -C(R6)-, -C(R6)-O-, -0-C(R6)-, -0-C(O)-O-,
-N(Rs)-Q-, -C(R6)-N(R8)-, -O-C(R6)-N(R8)-, -C(R6)-N(OR9)-, -O-N(R8)-Q-,
-0-N=C(R4)-, -C(=N-0-R8)-, -CH(-N(-O-Rs)-Q-R4)-,
Figure imgf000125_0001
Figure imgf000126_0001
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino, (dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
Figure imgf000126_0002
R6 is selected from the group consisting of =0 and =S;
R7 is C2-7 alkylene;
R8 is selected from the group consisting of hydrogen, C1-10 alkyl, C2-I0 alkenyl, C1-10 alkoxy-d-ϊo alkylenyl, hydroxy-C1-10 alkylenyl, heteroaryl-C1-10 alkylenyl, and aryl-Ci-K) alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl;
R10 is C3-8 alkylene;
A is selected from the group consisting of -O-, -C(O)-, -S(O)0-2-, -CH2-, and -NC-Q-R4)-; A1 is selected from the group consisting of -O-, -S(O)0-2-, -N^Q-R4)-, and -CH2-;
Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-, -S(O)2-, -C(Re)-N(Re)-W-, -S(O)2-N(R8)-, -C(Re)-O-, -C(Rg)-S-, and -C(Rg)-N(OR9)-;
V is selected from the group consisting Of -C(R6)-, -0-C(R6)-, -N(Rg)-C(R6)-, and -S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7.
4. A compound of the Formula II:
Figure imgf000127_0001
II wherein:
Z is selected from the group consisting of:
-C(=N-O-R2.2)- and -C(R2-4)(-N(-OR2-2)- Y-R2-3)-;
X is selected from the group consisting of a bond, C1-4 alkylene and C2-4 alkenylene;
R2-1, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)0-2-R2-5,
-NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro,
-N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy,
-C(O)-O-alkyl,
-C(O)-N(R8)2,
-N(R8)-C(O)-R2-5, -NH-C(O)-NH-R2-S,
-NH-C(O)-NH2
-O-(CO)-alkyl, and
-C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom;
R2-4 is selected from the group consisting of hydrogen, C1-4alkyl, and phenyl; R.2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-, -S(O)2-, -S(O)2-N(R8)-,
Figure imgf000129_0001
-C(O)-O-, -C(R6)-N(R8)-, -C(O)-N(R8)-S(O)2-, -C(Re)-N(Re)-C(O)-,
-C(O) - N , ^- Ri° ,
-C(O)-C(O)-,
-C(O)-C(O)-O-, and
-C(=NH)-N(R8)s
RA1 and RBI are each independently selected from the group consisting of: hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and
-N(Re)2; R1 is selected from the group consisting of:
-R4, -X--R4, -X-V-R4,
-X-Y-X-Y-R4, and -X'-R5;
X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of:
-O-, -S(O)0-2-,
-S(O)2-N(R8)-, -C(R6)-, -C(Rg)-O-, -0-C(R6)-, -0-C(O)-O-,
-N(Rs)-Q-, -C(R6)-N(R8)-, -0-C(Rg)-N(R8)-, -C(Re)-N(OR9)-, -O-N(R8)-Q-,
-0-N=C(R4)-, -CC=N-O-R8)-, -CHC-NC-O-Rs)-Q-R4)-,
Figure imgf000130_0001
Figure imgf000131_0001
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino, (dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
Figure imgf000131_0002
R6 is selected from the group consisting of =0 and ^S;
R7 is C2-7 alkylene;
Rg is selected from the group consisting of hydrogen, Ci-10 alkyl, C2-10 alkenyl, C1-10 alkoxy-C1-10 alkylenyl, hydroxy-C1-10 alkylenyl, heteroaryl-d-io alkylenyl, and aryl-C1-10 alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl;
R10 is C3-8 alkylene;
A is selected from the grqup consisting of -O-, -C(O)-, -S(O)0-2-, -CH2-, and -Nt-Q-R4)-; A' is selected from the group consisting of -O-, -S(O)0-2-, -N(-Q-R4)-, and -CH2-; Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-, -S(O)2-, -C(Re)-N(Re)-W-, -S(O)2-N(R8)-, -C(Re)-O-, -C(R6)S-, and -C(Re)-N(OR9)-;
V is selected from the group consisting Of-C(R6)-, -0-C(R6)-, -N(Rs)-C(R6)-, and -S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof.
5. A compound of the Formula III:
Figure imgf000132_0001
III wherein:
Z is selected from the group consisting of: -C(=N-O-R2-2)- and
-C(R2-4)(-N(-OR2-2)- Y-R2-3)-;
X is selected from the group consisting of a bond, C1-4 alkylene and C2-4 alkenylene;
R2-1, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)O-2-R2-5,
-NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro,
-N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy,
-C(O)-O-alkyl,
-C(O)-N(Rg)2,
-N(R8)-C(O)-R2-5, -NH-C(O)-NH-R2-5,
-NH-C(O)-NH2
-O-(CO)-alkyl, and
-C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom;
R2-4 is selected from the group consisting of hydrogen, Chalky!, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3;
Y is selected from the group consisting of: a bond,
-C(R6)-, -S(O)2-, -S(O)2-N(R8)-,
Figure imgf000134_0001
-C(O)-O-,
Figure imgf000134_0002
-C(O)-N(Rs)-S(O)2-, -C(Re)-N(Re)-C(O)-,
Figure imgf000134_0003
-C(O)-C(O)-,
-C(O)-C(O)-O-, and
-C(=NH)-N(R8)-;
R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
-N(Re)2; n is an integer from O to 4; Ri is selected from the group consisting of: -R4, -X-R4, -X'-Y'-R4,
-XI-YI-XI-YI-R4> and -X'-R5;
R3 is selected from the group consisting of: -Z'-IU, -Z'-X'-RA, -Z'-X'-Y'-RA, -Z'-X- Y-X1- Y-R4, and
-Z'-X'-Rs; m is 0 or 1 , with the proviso that when m is 1 then n is 0 or 1 ; X1 is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of: -O-,
-S(O)0-2-, -S(O)2-N(R8)-,
-C(R6)-, -C(R6)-O-, -0-C(R6)-, -0-C(O)-O-, -N(R8)-Q-,
-C(Re)-N(R8)-, -O-C(R6)-N(R8)-, -C(Rg)-N(OR9)-, -0-N(R8)-Q-, -0-N=C(R4)-,
-C(=N-0-R8)-, -CH(-N(-O-R8)-Q-R4)-,
Figure imgf000136_0001
Z' is a bond or -O-;
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, rnercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino,
(dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
Figure imgf000136_0002
R6 is selected from the group consisting of =0 and =S; R7 is C2-7 alkylene;
R8 is selected from the group consisting of hydrogen, C1-I0 alkyl, C2-10 alkenyl, C1-10 alkoxy-CMoalkylenyl, hydroxy-C^io alkylenyl, heteroaryl-Ci.joalkylenyl, and aryl-Ci-joalkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl;
Ri0 is C3-8 alkylene;
A is selected from the group consisting of -O-, -C(O)-, -S(O)0-2-, -CH2-, and
-NC-Q-R4)-; A' is selected from the group consisting of -0-, -S(O)0-2-, -NC-Q-R4)-, and -CH2-;
Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-, -S(O)2-, -CCRe)-NCRe)-W-, -S(O)2-N(R8)-, -C(Rg)-O-, -C(R6)S-, and -C(R6)-N(OR9)-;
V is selected from the group consisting of -C(R6)-, -0-C(R6)-, -N(Rs)-C(R6)-, and -S(O)2-; W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof.
6. A compound of the Formula IV:
Figure imgf000137_0001
IV wherein:
Z is selected from the group consisting of:
Figure imgf000137_0002
-C(R2-4)(-N(-OR2-2)-Y-R2-3)-;
X is selected from the group consisting of a bond, C1-4 alkylene and C2-4 alkenylene;
R2-1, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)0-2-R2-S, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N35 aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl,
-C(O)-N(R8)2, -N(Rg)-C(O)-R2-S, -NH-C(O)-NH-R2-5, -NH-C(O)-NH2 -O-(CO)-alkyl, and -C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom; R2-4 is selected from the group consisting of hydrogen, C1-4alkyl, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substiruents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-, -S(O)2-,
-S(O)2-N(R8)-,
Figure imgf000139_0001
-C(O)-O-, -C(R6)-N(R8)-, -C(O)-N(Rg)-S(O)2-,
-C(R6)-N(R8)-C(O)-,
Figure imgf000139_0002
-C(O)-C(O)-, -C(O)-C(O)-O-, and -C(=NH)-N(R8)s
R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and -N(R9)2; n is an integer from 0 to 4;
R1 is selected from the group consisting of:
-R4,
-X-R4, -X' -T-R4,
-X'-Y'-X-Y'-R^ and
-X'-Rs;
X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of:
-O-,
-S(O)0-2-, -S(O)2-N(R8)-,
-C(R6)-,
-C(R6)-O-,
-0-C(R6)-,
-0-C(O)-O-,
Figure imgf000140_0001
-C(Rg)-N(R8)-,
-O-C(R6)-N(R8)-,
-C(R6)-N(OR9)-,
-0-N(Re)-Q-, -0-N=C(R4)-,
-CC=N-O-R8)-,
-CHC-NC-O-Re)-Q-R4)-,
Figure imgf000141_0001
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino, (dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
and
Figure imgf000141_0002
R6 is selected from the group consisting of =0 and =S; R7 is C2-7 alkylene;
R8 is selected from the group consisting of hydrogen, CMO alkyl, C2-I0 alkenyl, C1-I0 alkoxy-d-io alkylenyl, hydroxy-Ci.10 alkylenyl, heteroaryl-Q.io alkylenyl, and aryl-C1-10 alkylenyl; Rg is selected from the group consisting of hydrogen and alkyl;
R10 is C3-8 alkylene;
A is selected from the group consisting of -O-, -C(O)-, -S(O)0-2-, -CH2-, and -NC-Q-R4)-;
A' is selected from the group consisting of -O-, -S(0)o-2-, -NC-Q-R4)-, and -CH2-; Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-,
-S(O)2-, -C(R6)-N(R8)-W-, -S(O)2-N(R8)-, -C(Re)-O-, -C(R6)S-, and -C(Rg)-N(OR9)-;
V is selected from the group consisting of -C(Rg)-, -0-C(R6)-, -N(Rg)-C(Re)-, and -S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof.
7. A compound of the Formula V:
Figure imgf000142_0001
V wherein:
Z is selected from the group consisting of: -C(=N-O-R2-2)- and -C(R2-4)(-N(-OR2-2)-Y-R2-3)-; X is selected from the group consisting of a bond, C1-4 alkylene and
C2-4 alkenylene;
R2-1, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)0-2-R2-5, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl, -C(O)-N(Rg)2,
-N(R8)-C(O)-R2-5, -NH-C(O)-NH-R2-5, -NH-C(O)-NH2 -O-(CO)-alkyl, and
-C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom;
R2-4 is selected from the group consisting of hydrogen, C1-4alkyl, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-, -S(O)2-, -S(O)2-N(R8)-,
Figure imgf000144_0001
-C(O)-O-, -C(R6)-N(R8)-, -C(O)-N(R8)-S(O)2-, -C(Re)-N(Re)-C(O)-,
Figure imgf000144_0002
-C(O)-C(O)-, -C(O)-C(O)-O-, and -C(^NH)-N(R8)-; R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and -N(Rp)2; p is an integer from 0 to 3;
R1 is selected from the group consisting of: -R4,
-OC-R4, -X-Y-R4, -X'-Y'-X'-Y'-R4, and
-X-R5;
R3 is selected from the group consisting of: -Z-R4, -Z-X-R4, -Z-X-T-R4,
-Z-X-T-X-T-R4, and -Z'-X'-Rs; m is 0 or 1 , with the proviso that when m is 1 then p is 0 or 1 ; X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of:
-O-, -S(O)0-2-,
-S(O)2-N(R8)-, -C(R6)-, -C(Re)-O-, -0-C(R6)-, -0-C(O)-O-,
-N(Rs)-Q-, -C(Re)-N(R8)-, -O-C(R6)-N(R8)-,
-C(Re)-N(OR9)-,
Figure imgf000146_0001
-0-N=C(R4)-,
-C(=N-O-R8)-,
-CH(-N(-0-Rg)-Q-R4)-,
Figure imgf000146_0002
Z' is a bond or -O- ;
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino, (dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
Figure imgf000147_0001
R6 is selected from the group consisting of =0 and =S; R7 is C2-7 alkylene; R8 is selected from the group consisting of hydrogen, C1-10 alkyl, C2-I0 alkenyl,
C1-10 alkoxy-Ci-10alkylenyl, hydroxy-Q.jo alkylenyl, heteroaryl-C1-10alkylenyl, and aryl-Cj-io alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl; R10 is C3-8 alkylene; A is selected from the group consisting of -0-, -C(O)-, -S(O)0-2-, -CH2-, and
-Nt-Q-R4)-;
A1 is selected from the group consisting of -0-, -S(O)0-2-, -Nt-Q-R4)-, and -CH2-; Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-, -S(O)2-, -C(Re)-N(Re)-W-, -S(O)2-N(R8)-, -C(Re)-O-, -C(Re)-S-, and -C(Re)-N(OR9)-; V is selected from the group consisting of -C(R6)-, -0-C(R6)-, -N(Rs)-C(R6)-, and
-S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof.
8. A compound of the Formula VI:
Figure imgf000147_0002
VI wherein:
Z is selected from the group consisting of: -C(=N-O-R2.2)- and -C(R2-4)(-N(-OR2.2)- Y-R2-3)-;
X is selected from the group consisting of a bond, Cj-4 alkylene and C2-4 alkenylene; R2-I, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)0-2-R2-5, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl, -C(O)-N(Rs)2,
-N(Rs)-C(O)-R2-S, -NH-C(O)-NH-R2-S, -NH-C(O)-NH2 -O-(CO)-alkyl, and -C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom; R2-4 is selected from the group consisting of hydrogen, C1-4alkyl, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-,
-S(O)2-, -S(O)2-N(R8)-,
Figure imgf000149_0001
-C(O)-O-, -C(Re)-N(R8)-, -C(O)-N(Rs)-S(O)2-, -C(R6)-N(R8)-C(O)-,
Figure imgf000149_0002
-C(O)-C(O)-, -C(O)-C(O)-O-, and -CC=NH)-N(R8)-; R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
-N(R5O2; p is an integer from 0 to 3;
R1 is selected from the group consisting of:
-R4, -X-R4,
-X-Y-R4,
-X- Y-X-T-R4, and
-X-R5;
X' is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of:
-O-, -S(O)0-2-,
-S(O)2-N(R8)-, -C(R6)-, -C(Rg)-O-, -0-C(R6)-, -0-C(O)-O-,
-N(R8)-Q-5
Figure imgf000150_0001
-O-C(R6)-N(R8)-,
-C(Re)-N(OR9)-,
-O-N(R8)-Q-,
-0-N=C(R4)-,
-CC=N-O-R8)-,
-CHC-NC-O-Rg)-Q-R4)-,
Figure imgf000151_0001
R4 is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino,
(dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
Figure imgf000152_0001
R6 is selected from the group consisting of =0 and =S; R7 is C2.7 alkylene; R8 is selected from the group consisting of hydrogen, C1-10 alkyl, C2-10 alkenyl,
C1-10 alkoxy-CMo alkylenyl, hydroxy-C1-10 alkylenyl, heteroaryl-C1-10 alkylenyl, and ary 1-C1-10 alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl; R10 is C3-8 alkylene; A is selected from the group consisting of -0-, -C(O)-, -S(O)0-2-, -CH2-, and
-Nt-Q-R4)-;
A' is selected from the group consisting of -0-, -S(O)0-2-, -N^Q-R4)-, and -CH2-; Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-, -S(O)2-, -C(R6)-N(R8)-W-3 -S(O)2-N(R8)-, -C(R6)-O-, -C(Rg)-S-, and -C(Rg)-N(OR9)-; V is selected from the group consisting of -C(R6)-, -0-C(R6)-, -N(Rs)-C(R6)-, and
-S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof.
9. A compound of Formula VII :
Figure imgf000152_0002
VII wherein: G is selected from the group consisting of: -C(O)-R", α-aminoacyl, α-aminoacyl-α-aminoacyl, -C(O)-O-R", -C(O)-N(R"")R",
-C(=NYi)-R", -CH(OH)-C(O)-OY1, -CH(OC1-4 alkyl) Y0, -CH2Y2, and -CH(CH3)Y2;
R" and R"" are independently selected from the group consisting OfC1-10 alkyl, C3-7 cycloalkyl, phenyl, and benzyl, each of which may be unsubstituted or substituted by one or more substituents independently selected from the group consisting of halogen, hydroxy, nitro, cyano, carboxy, C1-6 alkyl, C1-4 alkoxy, aryl, heteroaryl, ary 1-C1-4 alky lenyl, heteroaryl-C1-4 alkylenyl, 1IaIo-C1-4 alkylenyl, halo-C1-4 alkoxy, -0-C(O)-CH3,
-C(O)-O-CH3, -C(O)-NH2, -0-CH2-C(O)-NH2, -NH2, and -S(O)2-NH2, with the proviso that R"" can also be hydrogen; α-aminoacyl is an α-aminoacyl group derived from an α-amino acid selected from the group consisting of racemic, D-, and L-amino acids; Y1 is selected from the group consisting of hydrogen, C1-6 alkyl, and benzyl;
Y0 is selected from the group consisting of C1-6 alkyl, carboxy-C1-6 alkylenyl, amino-C1-4 alkylenyl, mono-N-Ci-6 alkylamino-C1-4 alkylenyl, and di-N, N-C1-6 alkylamino-C1-4 alkylenyl;
Y2 is selected from the group consisting of mono- N-Ci-6 alky lamino, di-N,N-C1-6 alkylamino, morpholin-4-yl, piperidin-1-yl, pyrrolidin-1-yl, and 4-C1-4 alkylpiperazin-1-yl;
RA2 and RB2 are each independently selected from the group consisting of: hydrogen, halogen, alkyl, alkenyl, alkoxy, alkylthio, and
-N(R9)2; or when taken together, RA2 and RB2 form a fused benzene ring or fused pyridine ring wherein the fused benzene ring or fused pyridine ring is unsubstituted or substituted by one R3 group, or one R3 group and one R group, or one, two, three, or four R groups when on the fused benzene ring, or one, two, or three R groups when on the fused pyridine ring; or when taken together, RA2 and RB2 form a fused cyclohexene ring or a fused tetrahydropyridine ring, wherein the fused cyclohexene or tetrahydropyridine ring is unsubstituted or substituted by one or more R groups; Z is selected from the group consisting of: -C(=N-O-R2-2)- and -C(R2-4)(-N(-OR2.2)-Y-R2-3)-;
X is selected from the group consisting of a bond, C1-4 alkylene and C2-4 alkenylene;
R2-1, R2-2, and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino,
-S(O)0-2-R2-S, -NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro, -N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy, -C(O)-O-alkyl,
-C(O)-N(R8)2, -N(Rs)-C(O)-R2-5, -NH-C(O)-NH-R2-5, -NH-C(O)-NH2 -O-(CO)-alkyl, and
-C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom; R2-4 is selected from the group consisting of hydrogen, C1-4alkyl, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3;
Y is selected from the group consisting of: a bond,
-C(R6)-, -S(O)2-, -S(O)2-N(R8)-,
Figure imgf000156_0001
-C(O)-O-, -C(Rg)-N(R8)-, -C(O)-N(R8)-S(O)2-, -C(Re)-N(Re)-C(O)-,
Figure imgf000156_0002
-C(O)-C(O)-,
-C(O)-C(O)-O-, and -C(=NH)-N(R8)s
R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
-N(R9)2; R1 is selected from the group consisting of:
-R4,
-X'-R4,
-X-Y-R4,
-X-Y-X-Y-R4, and -X-R5;
R3 is selected from the group consisting of:
-Z'-R4,
-Z'-X'-Ri,
-Z'-X-Y'-R^ -Z'-X'-Y'-X'-Y'-fLj, and -Z1OC-R5;
X1 is selected from the group consisting of alkylene, alkenylene, alkynylene, arylene, heteroarylene, and heterocyclylene, wherein the alkylene, alkenylene, and alkynylene groups can be optionally interrupted or terminated by arylene, heteroarylene or heterocyclylene and optionally interrupted by one or more -O- groups; Y' is selected from the group consisting of: -O-,
-S(O)0-2-, -S(O)2-N(R8)-,
-C(R6)-, -C(Re)-O-, -0-C(R6)-, -0-C(O)-O-,
Figure imgf000157_0001
-C(R6)-N(R8)-, -O-C(R6)-N(R8)-, -C(R6)-N(OR9)-,
Figure imgf000157_0002
-0-N=C(R4)-,
-CC=N-O-R8)-, -CHC-NC-O-Re)-Q-R4)-,
Figure imgf000157_0003
Figure imgf000158_0001
Z' is a bond or -O-;
R4 is selected from the group consisting of hydrogeX alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl, wherein the alkyl, alkenyl, alkynyl, aryl, arylalkylenyl, aryloxyalkylenyl, alkylarylenyl, heteroaryl, heteroarylalkylenyl, heteroaryloxyalkylenyl, alkylheteroarylenyl, and heterocyclyl groups can be unsubstituted or substituted by one or more substituents independently selected from the group consisting of alkyl, alkoxy, hydroxyalkyl, haloalkyl, haloalkoxy, halogen, nitro, hydroxy, mercapto, cyano, aryl, aryloxy, arylalkyleneoxy, heteroaryl, heteroaryloxy, heteroarylalkyleneoxy, heterocyclyl, amino, alkylamino, dialkylamino, (dialkylamino)alkyleneoxy, and in the case of alkyl, alkenyl, alkynyl, and heterocyclyl, oxo;
R5 is selected from the group consisting of:
Figure imgf000158_0002
R6 is selected from the group consisting of =0 and =S;
R7 is C2-7 alkylene;
R8 is selected from the group consisting of hydrogen, C1-10 alkyl, C2-I0 alkenyl, C1-10 alkoxy-C1-10 alkylenyl, hydroxy-C1-10 alkylenyl, heteroaryl-C1-10 alkylenyl, and aryl-d-jo alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl;
R10 is C3-8 alkylene;
A is selected from the group consisting of -O-, -C(O)-, -S(O)0-2-, -CH2-, and -Nt-Q-R4)-;
A' is selected from the group consisting of -O-, -S(O)0-2-, ^(-Q-R4)-, and -CH2-; Q is selected from the group consisting of a bond, -C(R6)-, -C(R6)-C(R6)-, -S(O)2-, -C(Re)-N(Re)-W-, -S(O)2-N(R8)-, -C(Re)-O-, -C(R6)S-, and -C(Re)-N(OR9)-;
V is selected from the group consisting of -C(R6)-, -0-C(R6)-, -N(R8)-C(R6)-, and -S(O)2-;
W is selected from the group consisting of a bond, -C(O)-, and -S(O)2-; and a and b are independently integers from 1 to 6 with the proviso that a + b is < 7; or a pharmaceutically acceptable salt thereof.
10. A compound of Formula Villa:
Figure imgf000159_0001
Villa wherein:
Z is selected from the group consisting of:
-C(=N-O-R2-2)- and -C(R2-4)(-N(-OR2-2)- Y-R2-3)-;
X is selected from the group consisting of a bond, C1-4alkylene and C2-4 alkenylene;
R2-1, R2-2> and R2-3 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, heterocyclylalkylenyl, and alkyl, alkenyl, aryl, arylalkylenyl, heteroaryl, heteroarylalkylenyl, heterocyclyl, and heterocyclylalkylenyl, substituted by one or more substituents selected from the group consisting of: hydroxy, alkyl, haloalkyl, hydroxyalkyl, alkoxy, dialkylamino, -S(O)0-2-R2-5,
-NH-S(O)2-R2-5, haloalkoxy, halogen, cyano, nitro,
-N3, aryl, heteroaryl, heterocyclyl, aryloxy, arylalkyleneoxy,
-C(O)-O-alkyl,
-C(O)-N(Rg)2,
-N(R8)-C(O)-R2-5, -NH-C(O)-NH-R2-S5
-NH-C(O)-NH2
-O-(CO)-alkyl, and
-C(O)-alkyl; with the proviso that R2-2 is other than alkenyl wherein the carbon atom bonded to -O- is doubly bonded to another carbon atom;
R2-4 is selected from the group consisting of hydrogen, C1-4alkyl, and phenyl; R2-5 is selected from the group consisting of alkyl, aryl, arylalkylenyl, heteroaryl, and heteroarylalkylenyl, each of which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, cyano, nitro, alkoxy, dialkylamino, alkylthio, haloalkyl, haloalkoxy, alkyl, and -N3; Y is selected from the group consisting of: a bond, -C(R6)-, -S(O)2-, -S(O)2-N(R8)-,
Figure imgf000161_0001
-C(O)-O-, -C(Rg)-N(R8)-, -C(O)-N(Rs)-S(O)2-, -C(R6)-N(R8)-C(O)-,
Figure imgf000161_0002
-C(O)-C(O)-,
-C(O)-C(O)-O-, and
-C(=NH)-N(R8)s
R is selected from the group consisting of: halogen, hydroxy, alkyl, alkenyl, haloalkyl, alkoxy, alkylthio, and
-N(R9)2; n is an integer from O to 4; R6 is selected from the group consisting of =0 and =S; Rs is selected from the group consisting of hydrogen, C1-Io alkyl, C2-10 alkenyl, C1-I0 alkoxy-Ci-Kj alkylenyl, hydroxy-Cj.joalkylenyl, heteroaryl-d-jo alkylenyl, and aryl-Ci.jo alkylenyl;
R9 is selected from the group consisting of hydrogen and alkyl; and R1O is C3-S alkylene; or a pharmaceutically acceptable salt thereof.
11. The compound or salt of claim 4 wherein RAI and RB1 are each methyl.
12. The compound or salt of claim 5 or claim 7 wherein R is halogen or hydroxy.
13. The compound or salt of any one of claims 5, 6, and 10 wherein n is 0.
14. The compound or salt of claim 7 or claim 8 wherein p is 0.
15. The compound or salt of any one of claims 2, 3 as dependent on claim 2, 5, 7, 9,
12, 13 as dependent on claim 5, and 14 as dependent on claim 7, wherein R3 is selected from the group consisting of phenyl, pyridin-3-yl, pyridin-4-yl, 5-(hydroxymethyl)pyridin- 3-yl, 2-ethoxyphenyl, 3-(morpholine-4-carbonyl)phenyl, and 3-(N1N- dimethylaminocarbonyl)phenyl.
16. The compound or salt of any one of claims 2, 3 as dependent on claim 2, 5, 7, 9, 13 as dependent on claim 5, and 14 as dependent on claim 7 wherein R3 is benzyloxy.
17. The compound or salt of any one of claims 5, 7, 12, 13 as dependent on claim 5, or 14 as dependent on claim 7, wherein m is 0.
18. The compound or salt of any one of claims 1 through 17 wherein Z is -C(=N-O-R2-2)-.
19. The compound or salt of any one of claims 1 through 17 wherein Z is -C(R2-4)(-N(-OR2-2)-Y-R2-3)-.
20. The compound or salt of claim 19 wherein R2-4 is hydrogen.
21. The compound or salt of claim 19 or claim 20 wherein Y is a bond.
22. The compound or salt of any one of claims 19 through 21 wherein R2-3 is selected from the group consisting of hydrogen and alkyl.
23. The compound or salt of claim 19 or claim 20 wherein Y is selected from the group consisting of -C(O)-, -S(O)2-, -C(O)-NH-, and R2-3 is alkyl.
24. The compound or salt of any one of claims 18 through 23 wherein R2-2 is selected from the group consisting of hydrogen, alkyl, arylalkylenyl, and heteroarylalkylenyl.
25. The compound or salt of claim 24 wherein R2-2 is hydrogen, Ci-4 alkyl, benzyl, or pyridin-2-ylmethyl .
26. The compound or salt of any one of claims 18 through 25 wherein R2-1 is selected from the group consisting of hydrogen, alkyl, and aryl.
27. The compound or salt of claim 26 wherein R2-1 is hydrogen, Ci-4 alkyl, or phenyl.
28. The compound or salt of any one of claims 1 through 27 wherein X is a bond or C1-4 alky lene.
29. The compound or salt of claim 28 wherein X is a bond, methylene, or ethylene.
30. The compound or salt of any one of claims 3 through 9, 11, 12, 13 except as dependent on claim 10, 14 through 17, and 18 through 29 except as dependent on claim 10 wherein R1 is selected from the group consisting of alkyl, arylalkylenyl, aryloxyalkylenyl, hydroxyalkyl, dihydroxyalkyl, alkylsulfonylalkylenyl, -X'- T-R4, -X'-R5, and heterocyclylalkylenyl; wherein the heterocyclyl of the heterocyclylalkylenyl group is optionally substituted by one or more alkyl groups; wherein X' is alkylene; Y' is
-N(Rg)-C(O)-, -N(Rg)-S(O)2-, -N(Rg)-C(O)-N(R8)-, or
Figure imgf000164_0001
; R4 is alkyl, aryl,
-N- C(R6) -N- S(O)2 or heteroaryl; and R5 is 7 , R, 7 . , o orr
Figure imgf000164_0002
31. The compound or salt of claim 30 wherein Ri is selected from the group consisting of 2-hydroxy-2-methylpropyl, 2-methylpropyl, propyl, ethyl, methyl, 2,3- dihydroxypropyl, 2-phenoxy ethyl, 4~[(methylsulfonyl)arnino]butyl, 2-methyl-2- [(methylsulfonyl)amino]propyl, 2-(acetylamino)-2-methylpropyl, 2- { [(isopropy lamino)carbonyl] amino } -2-methylpropyl,
4- { [(isopropylamino)carbonyl]amino} butyl, 4-( 1 , 1 -dioxidoisothiazolidin-2-yl)butyl, tetrahydro-2H-pyran-4-ylmethyl, and (2,2-dimethyl-l ,3-dioxolan-4-yl)methyl.
32. The compound or salt of claim 30 wherein R1 is selected from the group consisting of ( 1 -hydroxy cyclobuty l)methyl, ( 1 -hydroxy cyclopentyl)methyl, and ( 1 - hydroxy cyclohexyl)methyl .
33. A pharmaceutical composition comprising a therapeutically effective amount of a compound or salt of any one of claims 1 through 32 and a pharmaceutically acceptable carrier.
34. A method of inducing cytokine biosynthesis in an animal comprising administering an effective amount of a compound or salt of any one claims 1 through 32 or the pharmaceutical composition of claim 33 to the animal.
35. A method of treating a viral disease in an animal in need thereof comprising administering a therapeutically effective amount of a compound or salt of any one of claims 1 through 32 or the pharmaceutical composition of claim 33 to the animal.
36. A method of treating a neoplastic disease in an animal in need thereof comprising administering a therapeutically effective amount of a compound or salt of any one of claims 1 through 32 or the pharmaceutical composition of claim 33 to the animal.
PCT/US2006/004737 2005-02-11 2006-02-10 Oxime and hydroxylamine substituted imidazo[4,5-c] ring compounds and methods WO2006086634A2 (en)

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EP06720606A EP1846405A2 (en) 2005-02-11 2006-02-10 Oxime and hydroxylamine substituted imidazo 4,5-c ring compounds and methods
US11/884,153 US7968563B2 (en) 2005-02-11 2006-02-10 Oxime and hydroxylamine substituted imidazo[4,5-c] ring compounds and methods
JP2007555245A JP2008530113A (en) 2005-02-11 2006-02-10 Oxime and hydroxyramine substituted imidazo [4,5-c] ring compounds and methods
AU2006213746A AU2006213746A1 (en) 2005-02-11 2006-02-10 Oxime and hydroxylamine substituted imidazo(4,5-c) ring compounds and methods
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