CA2261760C - Sulfonamides and derivatives thereof that modulate the activity of endothelin - Google Patents

Abstract

Thienyl-, furyl- and pyrrolyl-sulfonamides, formulations of pharmaceutically acceptable salts thereof and methods for modulating or altering the activity of the endothelin family of peptides are provided. In particular, N-(isoxazolyl)thienylsulfonamides, N-(isoxazolyl)furylsulfonamides and N-(isoxazolyl)pyrrolylsulfonamides, formulations thereof and methods using these sulfonamides for inhibiting the binding of an endothelin peptide to an endothelin receptor by contacting the receptor with the sulfonamide are provided. Methods for treating endothelin-mediated disorders by administering effectiv e amounts of one or more of these sulfonamides or prodrugs thereof that inhibit the activity of the endothelin are also provided.</SDOA B>

Description

77718-35(S) SULFONAMIDES AND DERIVATIVES THEREOF THAT MODULATE THE
ACTIVITY OF ENDOTHELIN
RELATED APPLICATIONS
This application is related to International PCT
Publication No. WO 96/:37.492 entitled "THIENYL-, FURYL-PYRROLYL- AND BIPHENYLStJLFONAMIDES AND DERIVATIVES THEREOF
THAT MODULATE THE ACTIVZ:TY OF ENDO'THELIN"; U.S. Patent No.
5,594,021, entitled, "TFiIENYL-, FURYL- AND PYRROLYL
SULFONAMIDES AND DERIVATIVES THEREOF THAT MODULATE THE
ACTIVITY OF ENDOTHELIN"; U.S. Patent No. 5,571,821, to Chan et al., entitled "SULFOT1AMIDES AND DERIVATIVES THEREOF THAT
MODULATE THE ACTIVITY OF' ENDOTHELIN"; U.S. Patent No.
5,591,761, to Chan et al.., entitled "THIOPHENYL-, FURYL- AND
PYRROLYL- SULFONAMIDES F.ND DERIVATIVES THEREOF THAT MODULATE
THE ACTIVITY OF ENDOTHEL~IN"; U.S. Patent No. 5,514,691, to Chan et al . , entitled "I~f-- (4-HALO-ISOXAZOLYL) -SULFONAMIDES
AND DERIVATIVES THEREOF THAT MODULATE THE ACTIVITY OF
ENDOTHELIN"; and U.S. P~;t:ent No. 5,464,853, to Chan et al., 77718-35(S) entitled "N-(5-ISOXAZOLYL)BIPHENYLSULFONAMIDES, N-(3-ISOXAZOLYL)BIPHENYLSULFONAMIDES AND DERIVATIVES THEREOF THAT
MODULATE THE ACTIVITY OF ENDOTHELIN"
FIELD OF THE INVENTION
The present invention relates to compounds that modulate the activity of the endothelin family of peptides.
In particular, the invention relates to the use of sulfonamides and sulfon<~mide salts and pro-drugs as endothelin agonists and antagonists.

77718-35(S) BACKGROUND OF THE INVENTION
The vascular endothelium releases a variety of vasoactive substances, including the endothelium-derived vasoconstrictor peptide, endothelin (ET) (see, eg., Vanhoutte et al. (1986) Annual Rev. Physiol. 48: 307-320;
Furchgott and. Zawadski (:L980) Nature 288: 373-376).
Endothelin, which was originally identified in the culture supernatant of porcine aortic endothelial cells (see, Yanagisawa et al. (1988) Nature 332: 411-415), is a potent twenty-one amino acid peptide vasoconstrictor. It is the most potent vasopressor known and is produced by numerous cell types, including tree cells of the endothelium, trachea, kidney and brain. Endot;helin is synthesized as a two hundred and three amino acid precursor preproendothelin that contains a signal sequence which is cleaved by an endogenous 77718-35(S) protease to produce a thirty-eight (human) or thirty-nine (porcine) amino acid peptide. This intermediate, referred to as big endothelin, i:~ processed in vivo to the mature biologically active form by a putative endothelia-converting enzyme fECE) that appears to be a metal-dependent neutral protease (see, e-a., Kashiwabara et al. (1989) FEBS Lttrs. 247: 337-340). Cleavage is required for induction of physiological responses (see, e-ct., von Geldern et al.
(1991) Peptide Res. 4: 32-35). In porcine aortic endothelial cells, the thirty-nine amino acid intermediate, big endothelia, is hydrolyzed at the Trp2'-ValZZ bond to generate endothelia-1 and a C-terminal fragment. A similar cleavage occurs in human cells from a thirty-eight amino acid intermediate. Three distinct endothelia isopeptides, endothelia-1, endothelia-2 and endothelia-3, that exhibit potent vasoconstrictor activity have been identified.
The family of three isopeptides endothelia-1, endothelia-2 and endothelia-3 are encoded by a family of three genes (see, Inoue et al. ( 1989) Proc. Natl. Acad. Sci. USA 86: 2863-2867; see, also Saida et al. ( 19891J.
Biol. Chem. 264: 14613-14616). The nucleotide sequences of the three human genes are highly conserved within the region encoding the mature 21 amino acid peptides and the C-terminal portions of the peptides are identical.
Endothelia-2 is (Trp6,Leu') endothelia-1 and endothelia-3 is (Thr2,Phe4,Thr5,Tyr6,Lys',Tyr'4) endothelia-1. These peptides are, thus, highly conserved at the C-terminal ends. Release of endothelins from cultured endothelial cells is modulated by a variety of chemical and physical stimuli and appears to be regulated at the level of transcription and/or translation.
Expression of the gene encoding endothelia-1 is increased by chemical stimuli, including adrenaline, thrombin and Ca2+ ionophore. The production and release of endothelia from the endothelium is stimulated by angiotensin II, vasopressin, endotoxin, cyclosporine and other factors (see, Brooks et _al.
(1991) Eur. J. Pharm. 194:115-117), and is inhibited by nitric oxide.
Endothelial cells appear to secrete short-lived endothelium-derived relaxing factors (EDRF), including nitric oxide or a related substance (Palmer et al.
11987) Nature 327: 524-526), when stimulated by vasoactive agents, such as acetylcholine and bradykinin. Endothelia-induced vasoconstriction is also attenuated by atrial natriuretic peptide (ANP).

The endothelin peptides exhibit numerous biological activities in vitro and in vivo. Endothelin provokes a strong and sustained vasoconstriction in vivo in rats and in isolated vascular smooth muscle preparations; it also provokes the release of eicosanoids and endothelium-derived relaxing factor (EDRF) from perfused vascular beds. Intravenous administration of endothelin-1 and in vitro addition to vascular and other smooth muscle tissues produce long-lasting pressor effects and contraction, respectively (see, e-a., Bolger et al. (1991) Can. J. Physiol. Pharmacol. 69: 406-413). In isolated vascular strips, for example, endothelin-1 is a potent (EC5° = 4 x 10-'° M), slow acting, but persistent, contractile agent. In vivo, a single dose elevates blood pressure in about twenty to thirty minutes. Endothelin-induced vasoconstriction is not affected by antagonists to known neurotransmitters or hormonal factors, but is abolished by calcium channel antagonists. The effect of calcium channel antagonists, however, is most likely the result of inhibition of calcium influx, since calcium influx appears to be required for the long-lasting contractile response to endothelin.
Endothelin also mediates renin release, stimulates ANP release and induces a positive inotropic action in guinea pig atria. In the lung, endothelin-1 acts as a potent bronchoconstrictor (Maggi et al. (1989) Eur. J. Pharmacol.
160: 179-182). Endothelin increases renal vascular resistance, decreases renal blood flow, and decreases glomerular filtrate rate. It is a potent mitogen for glomerular mesangial cells and invokes the phosphoinoside cascade in such cells (Simonson et al. (1990) J. Clin. Invest. 85: 790-797).
There are specific high affinity binding sites (dissociation constants in the range of 2-6 x 10~'° M) for the endothelins in the vascular system and in other tissues, including the intestine, heart, lungs, kidneys, spleen, adrenal glands and brain. Binding is not inhibited by catechofamines, vasoactive peptides, neurotoxins or calcium channel antagonists. Endothelin binds and interacts with receptor sites that are distinct from other autonomic receptors and voltage dependent calcium channels. Competitive binding studies indicate that there are multiple classes of receptors with different affinities for the endothelia isopeptides. The sarafotoxins, a group of peptide toxins from the venom of the snake Atractaspis eingadensis that cause severe coronary vasospasm in snake bite victims, have structural and functional homology to endothelia-1 and bind competitively to the same cardiac membrane receptors (Kloog et al. (1989) Trends Pharmacol. Sci. 10: 212-214).
Two distinct endothelia receptors, designated ETA and ETB, have been identified and DNA clones encoding each receptor have been isolated (Arai _et al. (1990) Nature 348: 730-732; Sakurai et al. (1990) Nature 348: 732-735). Based on the amino acid sequences of the proteins encoded by the cloned DNA, it appears that each receptor contains seven membrane spanning domains and exhibits structural similarity to G-protein-coupled membrane proteins. Messenger RNA encoding both receptors has been detected in a variety of tissues, including heart, lung, kidney and brain. The distribution of receptor subtypes is tissue specific (Martin et al. (1989) Biochem. Biophys. Res Commun 162: 130-137). ETA receptors appear to be selective for endothelia-1 and are predominant in cardiovascular tissues. ETB
receptors are predominant in noncardiovascular tissues, including the central nervous system and kidney, and interact with the three endothelia isopeptides (Sakurai et al. (1990) Nature 348: 732-734). In addition, ETA receptors occur on vascular smooth muscle, are linked to vasoconstriction and have been associated with cardiovascular, renal and central nervous system diseases;
whereas ETg receptors are located on the vascular endothelium, linked to vasodilation (Takayanagi et al. (1991) FEBS Lttrs. 282: 103-106) and have been associated with bronchoconstrictive disorders.
By virtue of the distribution of receptor types and the differential affinity of each isopeptide for each receptor type, the activity of the endo-theiin isopeptides varies in different tissues. For example, endotheiin-1 inhibits 'z51-labelled endothelia-1 binding in cardiovascular tissues forty to seven hundred times more potently than endothelia-3. 'z51_labelled endothe-lin-1 binding in non-cardiovascular tissues, such as kidney, adrenal gland, and cerebellum, is inhibited to the same extent by endothelia-1 and endothelia-3, 77718-35(S) _g_ which indicates that ETA receptors predominate in cardiovascular tissues and ETB receptors predominate in non-cardiovascular tissues.
Endothelia plasma levels <jre elevated in certain disease states (see, e;4., International PCT Application WO 94/27979, and U.S. Patent No.
5,382,569.
Endothelia-1 plasma levels in healthy individuals, as measured by radioimmunoassay (RIA), are about 0.26-5 pg/ml. Blood levels of endothelia-1 and its precursor, big endotheNin, are,elevated in shock, myocardial infaw~c-tion, vasospastic angina, kidney failure and a variety of connective tissue disorders. In patients undergoing hemodialysis or kidney transplantation or suffering from cardiogenic shock, myocardial infarction or pulmonary hyper-tension levels as high as 35 pglml have been observed (see, Stewart et al.
(1991 ) Annals Internal Med. 1 14: 464-469). Because endothelia is likely to be a local, rather than a systemic, regulating factor, it,is probable that the levels of endothelia at the endoi:helium/smooth muscle interface are much higher than circulating levels.
Elevated levels of endothelia have also been measured in patients suffering from ischemic heart disease (Yasuda et al. ( 1990) Amer. Heart J.
119:801-806, Ray et al. (1992') Br. Heart J. 67:383-386). Circulating and tissue endothelia immunoreactivity is increased more than twofold in patients with advanced atherosclerosis (Lerman et al. ( 1991 ) New EnQt. J. Med.
325:997-1001 ). Increased endothelia immunoreactivity has also been associated with Buerger's disease (Kanno et al. ( 1990) J. Amer. Med. Assoc.
264:2868) and Raynaud's phenamenon (Zamora et al. (1990) lancet 336 1144-1 1471. Increased circulating endothelia levels were observed in patients who underwent percutaneous transluminal coronary angioplasty (PTCA) (Tahara et al. ( 1991 ) Metab. Clin. Exp. 40:1235-1237; Sanjay et al.
(1991) Circulation 84(Suppl. 4).:7261, and in individuals (Miyauchi et al.
( 1992) Jan J Pharmaco1.58:279P; Stewart et al. ( 1991 ) Ann.lnternal Medicine 114:464-469) with pulmonary hypertension. Thus, there is clinical _g_ human data supporting the correlation between increased endothelia levels and numerous disease states.
Endothelia agonists and antagonists Because endothelia is associated with certain disease states and is implicated in numerous physiological effects, compounds that can interfere with or potentiate endothelia-associated activities, such as endothelin-receptor interaction and vasoconstrictor activity, are of interest. Compounds that exhibit endothelia antagonistic activity have been identified. For example, a fermentation product of Streptomvces misakiensis, designated BE-18257B, has been identified as an ETA receptor antagonist. BE-18257B is a cyclic pentapeptide, cyclo(D-Glu-L-Ala-alto-D-Ile-L-Leu-D-Trp), which inhibits ,zsl_labelled endothelia-1 binding in cardiovascular tissues in a concentration-dependent manner (ICSO 1 .4 NM in aortic smooth muscle, 0.8 NM in ventricle membranes and 0.5 NM in cultured aortic smooth muscle cells), but fails to inhibit binding to receptors in tissues in which ETB receptors predominate at concentrations up to 100 NM. Cyclic pentapeptides related to BE-18257B, such as cyclo(D-Asp-Pro-D-Val-Leu-D-Trp) (BQ-123), have been synthesized and shown to exhibit activity as ETA receptor antagonists (see, U.S. Patent No. 5,114,918 to Ishikawa et al.; see, also, EP A1 0 436 189 to BANYU
PHARMACEUTICAL CO., LTD (October 7, 1991 )). Studies that measure the inhibition by these cyclic peptides of endothelia-1 binding to endotheiin-specific receptors indicate that these cyclic peptides bind preferentially to ETA
receptors. Other peptide and non-peptidic ETA antagonists have been identified (see, e-,a., 5,352,800, 5,334,598, 5,352,659, 5,248,807, 5,240,910, 5,198,548, 5,187,195, 5,082,838). These include other cyclic pentapeptides, acyltripeptides, hexapeptide analogs, certain anthraquinone derivatives, indanecarboxylic acids, certain N-pyriminylbenzenesulfonamides, certain benzenesulfonamides, and certain naphthalenesulfonamides (Nakajima et al. ( 1991 ) J. Antibiot. 44:1348-1356; Miyata et al. ( 1992) J. Antibiot.
45:74-8; Ishikawa et al. (1992) J.Med. Chem. 35:2139-2142; U.S. Patent No. 5,114,918 to Ishikawa et al.; EP A1 0 569 193; EP A1 0 558 258; EP

A1 0 436 189 to BANYU PHARMACEUTICAL CO., LTD (October 7, 1991 );
Canadian Patent Application 2,067,288; Canadian Patent Application 2,071,193; U.S. Patent No. 5,208,243; U.S. Patent No. 5,270,313; U.S.
Patent No. 5,612,359, U.S. Patent No. 5,514,696, U.S. Patent No.
5,378,715; Cody et al. (1993) Med. Chem. Res. 3:154-162; Miyata et al.
( 1992) J. Antibiot 45:1041-1046; Miyata et al. ( 1992) J. Antibiot 45:1029-1040, Fujimoto et al. (1992) FEBS Lett. 305:41-44; Oshashi et al. (1002) J.
Antibiot 45:1684-1685; EP A1 0 496 452; Clozel et al. (1993) Nature 365:759-761; International Patent Application W093/08799; Nishikibe et al.
( 1993) Life Sci. 52:717-724; and Benigni et al. ( 1993) Kidney Int.
44:440-444). Numerous sulfonamides that are endothelin peptide antagonists are also described in U.S. Patent Nos. 5,464,853, 5,594,021, 5,591 ,761, 5,571,821, 5,514,691, 5,464,853, International PCT application No.96/31492 and International PCT application No. WO 97/27979.
In general, the identified compounds have activities in in vitro assays as ETA antagonists at concentrations on the order of about 50-100,uM or less. A number of such compounds have also been shown to possess activity in in vivo animal models.
Endothelin antagonists and agonists as therapeutic agents It has been recognized that compounds that exhibit activity at ICSO or ECSO concentrations on the order of 10-a or lower in standard in vitro assays that assess endothelin antagonist or agonist activity have pharmacological utility (see, e-a., U.S. Patent Nos. 5,352,800, 5,334,598, 5,352,659, 5,248,807, 5,240,910, 5,198,548, 5,187,195 and 5,082,838). By virtue of this activity, such compounds are considered to be useful for the treatment of hypertension such as peripheral circulatory failure, heart disease such as angina pectoris, cardiomyopathy, arteriosclerosis, myocardial infarction, pulmonary hypertension, vasospasm, vascular restenosis, Raynaud's disease, cerebral stroke such as cerebral arterial spasm, cerebral ischemia, late phase cerebral spasm after subarachnoid hemorrhage, asthma, bronchoconstriction, renal failure, particularly post-ischemic renal failure, cyclosporine ___._._-...._.__..T

nephrotoxicity such as acute renal failure, colitis, as well as other inflammatory diseases, endotoxic shock caused by or associated with endothelia, and other diseases in which endothelia has been implicated.
In view of the numerous physiological effects of endothelia and its association with certain diseases, endothelia is believed to play a critical role in these pathophysiological conditions (see, ela., Saito et al. (1990) Hvaertension 15: 734-738; Tomita et al. ( 1989) N. Enal. J. Med. 321: 1 127;
Kurihara et al. (1989) J. Cardiovasc. Pharmacol. 13(Suppl. 5): S13-S17;
Doherty ( 1992) J. Med. Chem. 35: 1493-7 508; Morel et al. ( 1989) Eur. J.
Pharmacol. 167: 427-428). More detailed knowledge of the function and structure of the endothelia peptide family should provide insight in the progression and treatment of such conditions.
To aid in gaining further understanding of and to develop treatments for endothelia-mediated or related disorders, there is a need to identify compounds that modulate or alter endothelia activity. Identification of compounds that modulate endothelia activity, such as those that act as specific antagonists or agonists, may not only aid in elucidating the function of endothelia, but may yield in therapeutically useful compounds. In particular, compounds that specifically interfere with the interaction of endothelia peptides with the ETA or ETB receptors should be useful in identi-fying essential characteristics of endothelia peptides, should aid in the design of therapeutic agents, and may be useful as disease specific therapeutic agents. As noted above, many of the compounds, particularly the sulfona-mide compounds, are potent endothelia antagonists, and, thus, are ideal clinical candidates. For clinical use, potent compounds optimized for in vivo activity as well as stable formulations and suitable formulations for various routes of administration are needed.
Therefore, it is an object herein to provide compounds that have the ability to modulate the biological activity of one or more of the endothelia isopeptides and that exhibit in vivo. It is another object to provide compounds that have use as specific endothelia antagonists in vivo. It is also an object to use compounds that specifically interact with or inhibit the interaction of endothelia peptides with ETA receptors. It is also an object herein to provide formulations of such compounds useful for treatment of endothelia-mediated diseases. These compounds should be useful as therapeutic agents for the treatment of endothelia-mediated diseases and disorders.
SUMMARY OF THE INVENTION
Sulfonamides, formulations of sulfonamides and methods for modulating the interaction of an endothelia peptide with ETA and/or ETB
receptors are provided. In particular, sulfonamides, formulations of sulfona-mides and methods for inhibiting the binding of an endothelia peptide to ETA
or ETB receptors are provided. The sulfonamides are substituted or unsubstituted thienyl, furanyl and pyrrolyl sulfonamides.
Particularly preferred sulfonamides are N-isoxazolyl thiophene sulfona-mides where the thiophene is substituted with an aryl group, preferably a phenyl group, which has only one or two hydrogen substituents. These compounds appear to exhibit superior potency, efficacy, bioavailability, in vivo half-life and/or stability compared with compounds where the aryl group has more than two hydrogen substituents, while avoiding toxicological effects associated with hydrophobicity. In addition, these compounds appear to exhibit good profiles in standard in vitro toxicity tests.
It has been found that for in vivo administration, it is desirable to achieve the proper degree of hydrophilicity, which reduces potential hemolytic properties of the compounds. It has been found herein, for example, that this is achieved if the aryl group is tetra-, penta- or hexasubstituted, preferably pentasubstituted. If the aryl group is tetrasubstituted, it will preferably be substituted at the 2, 4 and 6 positions, and one of these substituents will be a polar group, such as hydroxyl, acetoxy, carboxyl and carboxamide. Such substitution enhances the endothelia antagonist activity and the hydrophilicity of the compounds. If the aryl group is substituted at the 2, 4 and 6 positions with nonpolar groups, such as alkyl groups, more specifically methyl groups, then the aryl group will preferably be yenta- or hexasubstituted. In pentasubstituted aryl groups, the fifth substituent will be at the 3 position and will preferably be a polar group, such as hydroxyl, acetoxy, carboxyl and carboxamide. Such substitution is preferred to achieve highest levels of activity for therapeutic use.
Such substitution provides compounds with good bioavailability, long in vivo half-life, and/or good in vivo efficacy. In view of the disclosure herein, other such optimal substituent patterns and substituents can be determined empirically using suitable animal models.
The sulfonamides, including pharmaceutically acceptable salts, acids, esters and other derivatives thereof, have the formula: (A):
Ar2 SOZ N- Ar' i H
in which Ar' is a substituted or unsubstituted aryl or heteroaryl group with one or more substituents, including an alkyl group, an aryl group, a substituted aryl group, a nitro group, an amino group or a halide or is an alkyl group. In particular, Ar' is alkyl or is a five or six membered substituted or unsubstituted aromatic or heteroaromatic ring, particularly 3- or 5-isoxazolyl and pyridazinyl, and also including thiazolyl, including 2-thiazolyl, pyrimidinyl, including 2-pyrimidinyl, or substituted benzene groups, including aryloxy substituted benzene groups or is a bicyclic or tricyclic carbon or heterocyclic ring. Preferred formulations of these compounds contain sodium salts of the compounds.
Among the compounds of interest herein are those in which Ar2 has the formula:

R, RZ
I M \ / R3 or RZ
R5 ~ Rs R°
in which M is (CH2)mC(O)(CHz),, (CHz)mC(O)NH(CHz)" (CHZ)m(CH=CH)(CHZ)"
(CHZ)mC(O)(CHZ)SNH(CHZ)" (CHZ)m(CH=CH)(CHZ),, C=N(OH)(CHZ)"
(CHz)mC(O)(CH=CH)SNH(CH2)" CH(OH)(CHz)" CH(CH3)C(O)(CHZ)~, CH(CH3)C(O)(CHZ)m(CH=CH)(CHZ),, (CHZ),, (CHZ),O, (CH2)S(O)~ wherein n is 0-2, C(O)O, in which m,s and r are each independently 0 to 6, preferably 0 to 3, more preferably M is (CHZ)mC(O)(CHZ)" (CHz)mClO)NH(CHZ),, fCHz)m(CH=CH)(CHZ)" (CH2)mC(O)(CHZ)SNH(CHZ)" (CHZ)m(CH=CH)(CHz)"
C = N(OH)(CHZ)" CH(OH)(CHZ)" (CHz)~, (CHz),O, (CH2)S(O)~, C(O)O;
R', R2, R3, R4 and R5 are each independently selected from (i) or (ii) as follows:
(i) R', RZ, R3, R4 and R5 are each independently selected from among H, OH, NHR38, CONR3aR39 , NOz, cyano, halide, pseudohalide, alkyl, alkenyl, alkynyl, aryl, arylalkyl, heteroaryl, alkoxy, alkylamino, alkylthio, haloalkyl, alkylsulfinyl, alkylsulfonyl, alkoxycarbonyl, alkylcarbonyl, alkenylthio, alkenylamino, alkenyloxy, alkenyl sulfinyl, alkenylsulfonyl, alkoxycarbonyl, arylaminocarbonyl, alkylaminocarbonyl, aminocarbonyl, (alkyl-aminocarbonyllalkyl, acetoxy, hydroxyl, carboxyl, carboxyalkyl, carboxyalkenyl, alkylsulfonylaminoalkyl, cyanoalkyl, acetyl, acetoxyalkyl, hydroxyalkyl, alkyoxyalkoxy, hydroxyalkyl, (acetoxy)alkoxy, (hydroxy)alkoxy, formyl, suifonyl chlorides, amino acids, hexoses, O-glycosides, riboses, lower alkyl, CN, -(CHz)xC(O)(CHZ)X, -(CHz)X, (CHZ)xN-lower alkyl, -(CH2)XC(0)NH2, _..___..-~ ___._._. _..._.._ _._......._.~- -_r. ___.._... ._.

a D-, L- or racemic amino acid, a primary or secondary amide, O-glycoside, a hexose or ribose, -S(O)ZNHZ, hydroxy, alkoxy, alkoxycarbonyl, acetoxyalkyl, -(CH2)XCOOH; -(CHZ)xCOOH-, COZ-lower alkyl, CN, heteroaryl, -COC(O)ICH2)xCH3, -(CHZ)XN(CH3~Z, a sulfonyl chloride, S(O)ZNHRSO, alkylaryl, alkylheteroaryl, C(O)NHRS°, -(CHZ)xOH, -C(O)N(H)N(H)M, or;
(ii) at least two of R', R2, R3, R4 and R5, which substitute adjacent carbons on the ring, together form alkylenedioxy, alkylenethioxyoxy or alkylenedithioxy (i.e. -O-(CHz)~-O-, -S-(CHZ)~-O-, -S-(CHZ)~-S-, where n is 1 to 4, preferably 1 or 2,) which is unsubstituted or substituted by replacing one or more hydrogens with halide, loweralkyl, loweralkoxy or halo loweralkyl, and the others of R', R2, R3, R4 and R5 are selected as in (i);
and at least four of R', RZ, R3, R4 and R5 are not hydrogen, unless:
(a) R' and R3 are alkyl and R5 is Rz°, which is selected from the group consisting of aryl, heteroaryl, heterocycle, OH, CN, C(O)R'6, COZR'6, SH, S(O)~R'6 in which n is 0-2, a D, L or racemic amino acid, a ribose or hexose, an O-glycoside, a sulfonyl chloride, -(CHZ)xOH, NHOH, NR'ZR'6, NOz, N3, OR'6, R'ZNCOR'6 and CONR'ZR'6, then RZ and R4 may be H; or (b) when M is -CONHC(R'2)IR'61-, then R', RZ, R3, R4 and R5 may all be H;
(c) when M is -COCHR6-, Ar' is not an isoxazolyl, R' is alkyl, and R3 and R4 form alkylenedioxy, then RZ and R5 may be H;''C"C
R38 and R39 are each independently selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, haloalkyl alkylaryl, heterocycle, arylalkyl, arylalkoxy, alkoxy, aryloxy, cycloalkyl, cycloalkenyl and cycloalkynyl, and is preferably hydrogen, loweralkyl, loweralkoxy and lowerhaloalkyl;
X is S, 0 or NR", where R" contains up to about 30 carbon atoms, preferably 1 to 10, more preferably 1 to 6 and is selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, C(O)R'S and S(0)"R'S in which n is 0-2;
R'S is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryi, heterocycle, aralkyl, aralkoxy, cycioalkyl, cycloalkenyl, cycloalkynyl; R" and R'S are unsubstituted or are substituted with one or more substituents each selected independently from Z, which as defined herein includes hydrogen, halide, pseudohalide, alkyl, alkoxy, alkenyl, alkynyl, aryl, amino acids, primary and secondary amides, O-glycosides, hexoses, riboses, alkylaryl, alkylheteroaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, OH, CN, C10)R's, OC(O)R's, C02R's, OCOZR's, SH, S(O)"R's in which n is 0-2, NHOH, NR'ZR's, NO2, N3, OR's, R'2NCOR's and CONR'ZR's; R's is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, chloride, NHRs°, alkylaryl, alkylheteroaryl, or -(CHZ)xOH; R5° is a substituent such as hydrogen, lower alkyl, or lower alkoxy; R'2, which is selected independently from R" and Z, is selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, C(O)R" and S(O)~R" in which n is 0-2; R" is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl or cycloalkynyl; R'2 and R's may together form alkylene; each of R", R'z, R'S and R's may be further substituted with the any of the appropriate groups of those set forth for Z.
In all compounds, at least one of R' and RS is other than hydrogen.
X is preferably S, and M is preferably selected from among:
H
i ~ ~N\ c il o , o , o , and N ' O " R'° R ° OH
OR'o O
in which R4° is preferably hydrogen, alkyl, alkoxy, alkoxyalkyl, haloalkyl, and more preferably loweralkyi, loweralkoxy, or halo loweralkyl, and is more preferably hydrogen or loweralkyl, particularly methyl or ethyl, and is most preferably hydrogen.

In more preferred compounds, M is C(O)CH2, C(O)NH, -CH=CH-, CH2CHZCfO)(CH)2, CHZCHC(O)CHZ, and M is most preferably selected from among:
H
I
N\ O\
and O O O
ArZ most preferably has formula:
I I
Rz I
~ 5 i in which W is most preferably CHz or NH.
In all embodiments, the selected compounds preferably are not selected from the group consisting of:
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-hydroxymethyl-2,4,6-trimethylphenyfaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazoiyl)-2-(3-cyano-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methoxycarbonyl-2,4,6-trimethylphenyiaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-carboxyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methanesulfonyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-(2-hydroxyethyl)-2,4,6-trimethylphenyiaminocarbonyl)thiophene-3-sulfonamide;

N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-hydroxymethyl-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-cyano-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methoxycarbonyl-2,4,6-trimethylphenyfacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-13-carboxyl-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methanesulfonyl-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-(2-hydroxyethyl)-2,4,6-trimethylphenylacety!)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methyl-2,3,4-trimethoxyphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-2, 3,4-trimethoxyphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-2,3,4-trimethoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-carboxyl-2, 3,4-trimethoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-2,3,4-trimethoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-2,3,4-trimethoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-2,3,4-trimethoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyano-2, 3,4-trimethoxyphenyl-aminocarbonyl~thiophene-3-sulfonamide;
_ ____r ~ .._ ____. _.___... _ _ __. ~.__ .._..._~ __~.._.._ N-(4-chloro-3-methyl-5-isoxazolyl )-2-( 6-methyl-2, 3, 4-trimethoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-2,3,4-trimethoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-2,3,4-trimethoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-carboxyl-2, 3,4-trimethoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-2, 3,4-trimethoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-2,3,4-trimethoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-2, 3,4-trirnethoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methyl-3,4-(methylenedioxy)-2-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylenedioxy)-2-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chioro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-3,4-(methylenedioxy)-2-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl l-2-( 6-carboxyl-3,4-(methylenedioxy)-2-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-14-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4 (methylenedioxy)-2-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-3,4-(methylenedioxy)-2-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-3,4 (methylenedioxyl-2-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyano-3,4-(methylenedioxy)-2-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide;

N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,6-dimethyl-3,4-(methylenedioxy)phenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylenedioxy)-2-methylphenylaminocarbonyllthiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-carboxyl-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-3,4-(methylenedioxy)-2-methyiphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-3,4 (methylenedioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyano-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxy-3,4-(methylenedioxy)-2-methylphenylaminocarbonyllthiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-cyano-3,4-(methylenedioxy)-6-methylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-14-chloro-3-methyl-5-isoxazolyl)-2-(2-cyano-3,4-(methylenedioxy)-6-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-acetyl-3,4-(methylenedioxy)-6-methylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-acetyl-3,4-(methylenedioxy)-6-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methyl-3,4-(methylenedioxy)-2-methoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylenedioxy)-2-methoxyphenylacetyl)thiophene-3-sulfonamide;
._.___ _T __ . _ .

N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-3,4-(methylenedioxyl-2-methoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-carboxyl-3,4-(methylenedioxy)-2-methoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4-(methylenedioxy)-2-methoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-3,4-(methylenedioxy)-2-methoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-3,4-(methylenedioxy)-2-methoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyano-3,4-(methylenedioxy)-2-methoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,6-dimethyl-3,4-(methylenedioxy)phenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylenedioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyf)-2-(6-methoxycarbonyl-3,4-(methylenedioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-carboxyl-3,4-(methylenedioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4-(methylenedioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-3,4-(methylenedioxyl-2-methylphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-3,4-(methylenedioxy)-2-methylphenylacetyllthiophene-3-sulfonamide;
N-14-chloro-3-methyl-5-isoxazolyl)-2-(6-cyano-3,4-(methylenedioxy)-2-methylphenylacetyllthiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(fi-methoxy-3,4-(methylenedioxy)-2-methylphenyfacetyl)thiophene-3-sulfonamide;

N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-cyano-3,4-(methylenedioxy)-6-methylphenyfacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-cyano-3,4-(methylenedioxy)-6-methoxyphenylacetyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-acetyl-3,4-(methylenedioxyl-6-methylphenylacetyllthiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-acetyl-3,4-(methylenedioxy)-6-methoxyphenylacetyllthiophene-3-sulfonamide;
N-14-chloro-3-methyl-5-isoxazolyll-2-(2,6-bis(cyanomethyl)-3,4-(methylenedioxylphenylaminocarbonyl)thiophene-3-sulfonamide.
Thus, subject to the above proviso, the preferred sulfonamides or pharmaceutically acceptable salts, acids and esters thereof, of formula (A) have formula I:
A r' S O _; N H
R' / , ~ W ~ R-X
(11 O R; i R
o r RZ

w s a \ ~ R Are R
X~ SO~ NH
-or pharmaceutically acceptable acids, esters and salts thereof, where Ar' is a substituted or unsubstituted monocyclic or polycyclic, preferably a monocyclic or fused bicyclic, aryl or heteroaryl group with one or _.__...____._.-....__ T_ .._.

more substituents, selected from, for example, H, NHZ, halide, pseudohalide, alkyl, alkylcarbonyl, formyl, an aromatic or heteroaromatic group, alkoxyalkyl, alkylamino, alkylthio, arylcarbonyl, aryloxy, arylamino, arylthio, haloalkyl, haloaryl, carbonyl, in which the aryl and alkyl portions, are unsubstituted or substituted with any of the preceeding groups, and straight or branched chains of from about 1 up to about 10-12 carbons, preferably, 1 to about 5 or 6 carbons. The substituents are preferably H, NH2, halide, CH3, CH30 or another aromatic group, and the sulfonamides are preferably the thiophene-3-sulfonamides. R'-R5 are as defined above.
In particular, Ar' is a five or six membered substituted or unsubstituted aromatic or heteroaromatic ring or a fused bicyclic substituted or unsubstituted aromatic or heteroaromatic ring, preferably an isoxazolyl, pyridazinyl, thiazolyl, pyrimidiny) or phenyl groups and particularly 3- or 5-isoxazolyl, benzo-1,2,7-thiadiazol-4-yl, 2-pyrazinyl or benzo-1,2,7-oxadiazol-4-yl;
W is =C(halo)2, -(CH2)X-, =N(lower alkyl), -C(O)-, =C(lower alkyl)2, -NH-, =NCOR'6, -NHC(R'Z)(R'6)-, =NCOzR'6 or =CHR6~ x is 0-3; R', Rz, R3, R4 and R5 are each selected independently from Z, as defined above, or any two may form a ring containing two or more heteroatoms; and R6 is H, or substituted or unsubstituted alkyl or aryl, preferably H or substituted or unsubstituted lower alkyl, more preferably H, methyl or carboxymethyl. "C"C
In all embodiments, X is preferably S.
Ar' is preferably an isoxazolyl of formula:
RA RB RA RB
or in which RA and RB are either {i), (ii) or (iii) as follows:

(i1 RA and RB are each independently selected from H, NHz, NOz, halide, pseudohalide, alkyl, alkenyl, alkynyl, aryl, arylalkyl, heteroaryl, alkoxy, alkylamino, alkylthio, alkyioxy, haloalkyl, alkylsufinyl, alkylsulfonyl, aryloxy, arylamino, aryithio, arylsufinyl, arylsulfonyl, haloalkyl, haloaryl, alkoxycarbonyl, alkylcarbonyl, aminocarbonyl, arylcarbonyl, formyl, substituted or unsubstituted amido, substituted or unsubstituted ureido, in which the alkyl, alkenyl and alkynyl portions contain from 1 up to about 14 carbon atoms and are either straight or branched chains or cyclic, and the aryl portions contain from about 4 to about 16 carbons, except that Rz is not halide or pseudohalide; or, (ii) RA and RB together form -(CH2)~, where n is 3 to 6; or, (iii) R" and RB together form 1,3-butadienyl.
In preferred embodiments herein, R°' and RB are each selected independently from among alkyl, lower alkenyl, lower alkynyl, lower haloalkyl, halide, pseudohalide or H, except that Rg is not halide.
Preferred compounds herein are selected with the provisos that when Ar' is an isoxazolyl, particularly 4-chloro-3-methyl-5-isoxazolyl and W is -NH-:
(a) if R', R3 and R5 are methyl, and R4 is H; then RZ is not cyanomethyl, hydroxymethyl, cyano, methoxycarbonyl, carboxyl, methanesulfonyl, 2-hydroxyethyl;
(b) if R' is methoxy or is methyl when Rz and R3 together form methylenedioxy, R2 and R3 are methoxy or together form methylenedioxy, and R4 is H; then R5 is not methyl, cyano, acetyl, methoxycarbonyl, carboxyl, methanesulfonyl, cyanomethyl or 2-hydroxyethyl, and is not methoxy when R' is methyl;
(c) if R' is cyano or acetyl, RZ and R3 together form methylenedioxy, and R4 is H; then R5 is not methyl or methoxy;
(d) if R' is cyanomethyl, Rz and R3 together form methylenedioxy, and R4 is H; then R5 is not cyanomethyl;
and with the additional provisos that when Ar' is 4-chloro-3-methyl-5-isoxazolyl and W is -CH2-:

(a) if R', R3 and R5 are methyl, and R4 is H; then RZ is not cyanomethyl, hydroxymethyl, cyano, methoxycarbonyl, carboxyl, methanesulfonyl, 2-hydroxyethyl;
(b) if R' is methoxy when R2 and R3 are methoxy or together form methylenedioxy, or is methyl when R2 and R3 together form methylenedioxy, and R' is H; then R5 is not: (i) methyl, acetyl, methoxycarbonyl, carboxyl, methanesulfonyl, cyanomethyi or 2-hydroxyethyl, and additionally (ii) is not methoxy or cyano when R' is methyl, and (iii) is not cyano when R' is methoxy and RZ and R3 together form methyienedioxy;
(c) if R' is cyano or acetyl, RZ and R3 together form methylenedioxy, and R4 is H; then R5 is not methyl or methoxy.
In one embodiment, the sulfonamides and pharmaceutically acceptable salts, acids and esters thereof have formula II:
Are S O; NH
R' / \ W w S
~ R'~° / R (ll) or R~ R9 R~
\ R9 Rio A r' S O~ NH
-where Ar' is as defined above and R' is R', Rg is R3, R9 is R4 and R'°
is R5. fn particular, Arz is a five or six membered substituted or unsubstituted aromatic or heteroaromatic ring or a fused bicyclic substituted or unsubstituted aromatic or heteroaromatic ring, preferably 3- or 5-isoxazolyl, benzo-1,2,7-thiadiazol-4-yl, 2-pyrazinyl or benzo-1,2,7-oxadiazol-4-yl, more preferably 4-chloro-3-methyl-5-isoxazoiyl or 4-chloro-5-methyl-3-isoxazoiyl; W is -NH-, =NCOR'6, =NCOZR'6, -NHC(R'2)(R'6)- or is -CHZ- when R9 is hydroxyl.
In preferred of these embodiments, R9 is selected from the group consisting of substituted and unsubstituted alkyl, hydroxyl, substituted and unsubstituted alkoxy, OC(O)R'6, OCOzR'6, NR'ZR'6 and S(O)~R'6 in which n is 0-2, preferably alkoxycarbonylalkyl, ca~boxyalkyl, dialkylaminoalkyl, alkylsulfonylamino and aminosulfonyl with the proviso that, when W is -NHC(R'2)(R'6)-, then R', R8, R9 and R'° can be H.
R', R$ and R'° are preferably alkyl, haloalkyl, polyhaloalkyl, alkenyl containing 1 to 2 double bonds, alkynyl containing 1 to 2 triple bonds, cycloalkyl, cycloalkyialkyl, aryl, heteroaryl, aryialkyl, or heteroarylafkyl, more preferably lower alkyl, lower alkenyl, lower alkynyl, or aryl, most preferably methyl. The sulfonamides are preferably thiophene-3-sulfonamides.
In certain embodiments of formula (II), the compounds are selected with the proviso that when Ar' is 4-chloro-3-methyl-5-isoxazolyl and W is -NH-:
if R', R8 and R'° are methyl; then R9 is not cyanomethyl, hydroxymethyl, cyano, methoxycarbonyl, carboxyl, methanesulfonyl, or 2-hydroxyethyl;
if R'° is methoxy or is methyl when R8 and R9 together form methylenedioxy and R8 and R9 are methoxy or together form methylenedioxy;
then R' is not methyl, cyano, acetyl, methoxycarbonyl, carboxyl, methanesulfonyl, cyanomethyl or 2-hydroxyethyl, and is not methoxy when R'° is methyl;
if R'° is cyano or acetyl and R$ and R9 together form methylenedioxy;
then R' is not methyl or methoxy; and if R'° is cyanomethyl and RS and R9 together form methylenedioxy;
then R' is not cyanomethyl;
r ..__ ._ and with the additional proviso that R', Re, R9 and R'° may be H when W is -NHCIR'1)(R'6)-.
In more preferred embodiments, the sulfonamides of formula II are those in which R', Re, R9 and R'° do not contain cyano groups and W is not -CH -. These compounds are among those preferred because, among other properties, they appear to exhibit improved toxicological profiles relative to other compounds of formula II.
fn another embodiment of formula (A), the sulfonamides have formulae A r' /Are SU= NH SO-NH
G _ G
W~~\ R / \ ~, \ R.
I X
p ~~ ~ c , I
O G ~ O
Are O
R
SO-NH G
_ G
C.~ ~ W ~ G W ~ / G
X ~~ I , (III) R O G , / ~ /Are G R, X S O-NFI G
_ G
UV ~ / O R
or W
/ \ / O G Ar~ O O O ~O
/
X S O-N H
X SO=
NH Are where Ar' is as define above. Ar' is a five or six membered substituted or unsubstituted aromatic or heteroaromatic ring or a fused bicyclic substituted or unsubstituted aromatic or heteroaromatic ring, preferably 3- or 5-isoxazolyl, benzo-1,2,7-thiadiazol-4-yl, 2-pyrazinyl or benzo-1,2,7-oxadiazol-4-yl;
X is preferably S;

_28_ each G and R is independently selected from lower alkyl, CN, -(CHZ)xC(O)(CH2)x, -(CHz)X, (CHZ)xN-lower alkyl, -(CHZ)xC(O)NH2, a D-, L-or racemic amino acid, a primary or secondary amide, O-glycoside, a hexose or ribose, -S(O)2NHz, hydroxy, alkoxy, alkoxycarbonyl, acetoxyalkyl, -(CHZ)xCOOH; -(CHZ)xCOOH-, C02-lower alkyl, CN, heteroaryl, -COC(O)(CH2)XCH3, -(CHZ)xN(CH3)Z, a su)fonyl chloride, S10)2NHR5o, alkylaryl, alkylheteroaryl, C(O)NHRS°, -(CH2)xOH, -C(O)N(H)N(H)M; M is H
or R5°; R' is selected from hydrogen, G and R; V1/ is = C(halo)2, =
N(H), -(CHZ)X-, =N(lower alkyl), -C101-, =Cllower alkyl)2; and x is 0-3.
In another embodiment, the sulfonamides have formula IV:
Are i SO,-NH
RG M a S
O
O
or Me O
(IV) R~ O
~~O O
A r~
S SO-NH
where:
Ar' is defined as above, except when R6 is H, then Ar' is not 4-chloro-3-methyl-5-isoxazolyl, 4-chloro-5-methyl-3-isoxazolyl or 3,4-dimethyl-5-isoxazoly. Ar' is preferably benzo-1,2,7-oxadiazol-4-yl or 2-methoxy-3-pyrazinyl when R6 is H; and Ro is H, or substituted or unsubstituted alkyl or aryl, preferably H or substituted or unsubstituted lower alkyl, more preferably methyl or carboxymethyl.
In other embodiments of formula (IV), Ar' is preferably benzo-1,2,7-oxadiazol-4-yi or 2-methoxy-3-pyrazinyl when R6 is H and T
_._.. _____._..~~.-~_ ~..~.___ . _ _ _._ ____.~_..___ WO 98/13366 PCTlUS97/17402 R6 is H, or substituted or unsubstituted alkyl or aryl, preferably H or substituted or unsubstituted lower alkyl, more preferably methyl or carboxymethyl.
In another embodiment, the sulfonamides have formula V:
A r' S O~ NH
R
S ~W
O i Me Me or Rio (V) Me W \
~ ~ 'O MeAr~
S SO~ NH
where Ar' is defined as above and is preferably 4-chloro-3-methyl-5-isoxazofyl; W is NH; and RZ° is selected from the group consisting of aryl, heteroaryl, heterocycle, OH, CN, C(0)R'6, COzR'6, SH, S(O)~R'6 in which n is 0-2, a D, L or racemic amino acid, a ribose or hexose, an O-glycoside, a sulfonyl chloride, -(CH2)xOH, NHOH, NR'ZR'6, NO2, N3, OR'6, R'zNCOR'6 and CONR'ZR'6; R'6 is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyf, cycloalkenyl or cycloalkynyl; R'Z
is selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, C(O)R" and Si0)~R"
in which n is 0-2; R" is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl or cycloalkynyl; each of R'2, R'S and R'6 may be further substituted with the any of the groups set forth for Z; R2° is preferably CONHz, COOH, or phenyl.

Of the compounds described herein, those that inhibit or increase an endothelin-mediated activity by about 50% at concentrations of less than about 10 NM are preferred. More preferred are those that inhibit or increase an endothelin-mediated activity by about 50% at concentrations of less than about 1 NM, more preferably less than about 0.1 ,uM, even more preferably less than about 0.01 ,uM, and most preferably less than about 0.001 ~rM. It is noted that, as described below, the ICSO concentration determined in the in vitro assays is a non-linear function of incubation temperature. The preferred values recited herein refer to the assays that are performed at 4° C.
When the assays are performed at 24° C, somewhat higher (see, Table 11 lCSo concentrations are observed. Accordingly, the preferred ICSO concentrations are about 10-fold higher. Furthermore, among these compounds, those that exhibit the greatest bioavailability and stability, as determined using standard animal models Also among the most preferred compounds for use in methods provided herein, are those that are ETA selective, i.e., they interact with ETA
receptors at substantially lower concentrations (at an ICSO at least about 10-fold lower, preferably 100-fold lower) than they interact with ETB receptors.
In particular, compounds that interact with ETA with an ICSO of less than about 10 ,uM, preferably less than 1 ,uM, more preferably less than 0.1 ,uM, but with ETB with an ICSO of greater than about about 10,uM or compounds that interact with ETB with an ICSO of less than about 10 ,uM, preferably less than ,uM, more preferably less than 0.1 NM, but with ETA with an ICSO of greater than about 10 NM are preferred.
Also of interest are any pharmaceutically-acceptable derivatives, including salts, esters, acids and bases, solvates, hydrates and prodrugs of the sulfonamides. Preferred are pharmaceutically-acceptable salts, including, but not limited to, amine salts, such as but not limited to N,N'-dibenzylethylenediamine, chloroprocaine, choline, ammonia, diethanolamine and other hydroxyalkylamines, ethylenediamine, N-methylglucamine, procaine, N-benzylphenethylamine, 1-para-chlorobenzyl-2-pyrrolidin-1'-ylmethyl-benzimidazole, diethylamine and other alkylamines, piperazine, tris(hydroxy-methyllaminomethane, alkali metal salts, such as but not limited to lithium, potassium and sodium, alkali earth metal salts, such as but not limited to barium, calcium and magnesium, transition metal salts, such as but not limited to zinc and other metal salts, such as but not limited to sodium hydrogen phosphate and disodium phosphate, preferably sodium salts, more preferably the sodium salt, and also including, but not limited to, salts of mineral acids, such as but not limited to hydrochlorides and sulfates, salts of organic acids, such as but not limited to acetates, lactates, malates, tartrates, citrates, ascorbates, succinates, butyrates, valerates and fumarates. Alkali metal salts, particularly sodium salts, are preferred herein. Most preferred salts are sodium salts.
Pharmaceutical formulations for administration by an appropriate route and means containing effective concentrations of one or more of the compounds provided herein or pharmaceutically acceptable salts, esters, acids and bases, solvates, hydrates and prodrugs of the sulfonamides, preferably salts, more preferably sodium salts, including but not limited to sodium salts and sodium hydrogen phosphate salts, most preferably the sodium salt, thereof that deliver amounts effective for the treatment of hypertension, stroke, cardiovascular diseases, cardiac diseases including myocardial infarction, pulmonary hypertension, erythropoietin-mediated hypertension, respiratory diseases,inflammatory diseases, including asthma, bronchoconstriction, ophthalmologic diseases including glaucoma and inadequate retinal perfusion, gastroenteric diseases, renal failure, endotoxin shock, menstrual disorders, obstetric conditions, wounds, anaphylactic shock, hemorrhagic shock, and other diseases in which endothelin mediated physiological responses are implicated or that involve vasoconstriction or whose symptoms can be ameliorated by administration of an endothelin antagonist or agonist, are also provided.
The formulations are compositions suitable for administration by any desired route and include solutions, suspensions, emulsions, tablets, 77718-35(S) dispersible tablets, pills, capsules, powders, dry powders for inhalation, sustained release formulations, aerosols for nasal and respiratory delivery, patches for transdermal delivery and and any other suitable route. The compositions should be suitable for oral administration, parenteral 5i administration by injection, including subcutaneously, intramuscularly or intravenously as an injectable aqueous or oily solution or emulsion, transdermal administration and other selected routes.
Lyophilized powders-of the sulfonamide derivatives, methods for preparation thereof, and formulations containing reconstituted forms of the 1C~ lyophilized powders are also provided. Vials and ampules and syringes and other suitable vessels containing the powders are also provided.
Preferred formulations include a sterile lyophilized powder containing pharmaceutically-acceptable salts, preferably sodium salts, more preferably a sodium salt, of a sulfonamide, .and also include capsules and tablets.
15. Particularly preferred formulations are those that deliver amounts effective for the treatment of hypertension or renal failure. The effective amounts and concentrations are effective for ameliorating any of the symptoms of any of the disorders.
In one embodiment, the formulations are lyophilized solids containing 20 one or more salts, preferably sodium hydrogen phosphate or sodium salts, more preferably sodium salts, of one or more sulfonamide compounds of formula 1 and also contain one or more of the following: a buffer, such as sodium or potassium phosphatE:, or citrate; a solubilizing agent, such as TM
LABRASOL (polyethylene glycol-8 caprylic capric glycerides sold by 25. Gattefosse SA, France), DMSO~, bis(trimethylsilyl)acetamide, ethanol, propyleneglycol (PG), or polyvinylpyrrolidine (PVP); and a sugar or other carbohydrate, such as sorbitol or dextrose.
In other embodiments, the formulations are solid dosage forms, preferably capsules or tablets. In a preferred embodiment, the formulations 30i are solid dosage forms, preferably capsules or tablets, containing 10-100%, preferably 50-95%, more preferably 75-85%, most preferably 80-85%, by 77718-35(S) weight, of one or more salts, preferably sodium hydrogen phosphate or sodium salts, more preferably the sodium salts, of one or more sulfonamide compounds of formula I; about 0-25%, preferably 8-15%, of an excipient or a binder, such as lactose or microcrystalline cellulose; about 0 to 10%, preferably about 3-7~0, of a disintegrant, such as a modified starch or cellulose polymer, particularly a cross-linked sodium carboxymethyl cellulose, such as crosscarmellose sodium ICrosscarmellose sodium NF is available TM
commercially under the name AC-DI-SOL, fMC Corporation, Philadelphia, PA) or sodium starch glycolate; and 0-2% of a lubricant, such a magnesium stearate, talc and calcium stearate. The disintegrant, such as crosscarmeilose sodium or sodium starch glycolate, provides for rapid break-up of the cellulosic matrix for immediate release of active agent following dissolution of coating polymer. In all embodiments, the precise amount of active ingredient and auxilliary ingredients can bf: determined empirically and is a function of the route of administration and the diorder that is treated.
In an exemplary embodiment, the formulations are capsules containing about 80-100%, preferably about 75-95%, more preferably about 83%, of one or more sodium salts of onE: or more sulfonamide compounds of formula !; about 0-15%, preferably about 1 1 % of an excipient or a binder, such as lactose or microcrystalline cellulose; about 0-10%, preferably about 5% of a disintegrant, such as crosscarmellose sodium or sodium starch glycolate; and about 0 to 5%, preferably about 1 % of a lubricant, such as magnesium stearate. Solid forms for administration as tablets are also contemplated herein. it is understood that precise amounts and composition thereof can be empirically determined by the skilled artisan.
Methods using such fore-iulations for modulating the interaction of an endothelin peptide with ETA andlor ETB receptors are provided. The methods are effected by contacting the receptors with one or more of the formulated pharmaceutically-acceptable salts of the sulfonamides, preferably formulated sodium salts of the sulfonamides, prior to, simultaneously with, or subsequent to contacting the receptors with an endothelin peptide.

Methods for inhibiting binding of an endothelin peptide to an endothelin receptor are provided. These methods are practiced by contacting the receptor with one or more of the compounds or one or more of the formu-lations of pharmaceutically-acceptable salts of the compounds provided herein simultaneously, prior to, or subsequent to contacting the receptor with an endothelin peptide.
Methods for treatment of endothelin-mediated disorders, including, but not limited to, hypertension, asthma, shock, ocular hypertension, glaucoma, inadequate retinal perfusion and other conditions that are in some manner mediated by an endothelin peptide, or for treatment of disorder that involve vasoconstriction or that are ameliorated by administration of an endothelin antagonist or agonist are provided.
In particular, methods of treating endothelin-mediated disorders by administering effective amounts of the sulfonamides, prodrugs or other suitable derivatives of the sulfonamides are provided. In particular, methods for treating endothelin-mediated disorders, including hypertension, cardiovascular diseases, cardiac diseases including myocardial infarction, pulmonary hypertension, erythropoietin-mediated hypertension, respiratory diseases and inflammatory diseases, including asthma, bronchoconstriction, ophthalmologic diseases, gastroenteric diseases, renal failure, endotoxin shock, menstrual disorders, obstetric conditions, wounds, anaphylactic shock, hemorrhagic shock, and other diseases in which endothelin mediated physiological responses are implicated, by administering effective amounts of one or more of the compounds provided herein in pharmaceutically acceptable carriers are provided. Preferred methods of treatment are methods for treatment of hypertension and renal failure.
More preferred methods of treatment are those in which the formulations contain at feast one compound that inhibits the interaction of endothelin-1 with ETA receptors at an ICSO of less than about 10 ,uM, and preferably less than about 5 ,uM, more preferably less than about 1 ~M, even more preferably less than 0.1 NM, and most preferably less than 0.05 ,uM
T _~

Other preferred methods are those in which the formulations contain pharmaceutically-acceptable salts of one or more compounds that is f are) ETA
selective or pharmaceutically-acceptable salts of one or more compounds that is (are) ETB selective. Methods in which the compounds are ETA selective are for treatment of disorders, such as hypertension; and methods in which the compounds are ETB selective are for treatment of disorders, such as asthma, that require bronchodilation.
In practicing the methods, effective amounts of formulations containing therapeutically effective concentrations of the compounds formulated for oral, intravenous, local and topical application for the treatment of hypertension, cardiovascular diseases, cardiac diseases, including myocardial infarction, respiratory diseases, including asthma, inflammatory diseases, ophthalmologic diseases, gastroenteric diseases, renal failure, immunosuppressant-mediated renal vasoconstriction, erythropoietin-mediated vasoconstriction, endotoxin shock, anaphylactic shock, hemorrhagic shock, pulmonary hypertension, and other diseases in which endothelia mediated physiological responses are implicated are administered to an individual exhibiting the symptoms of one or more of these disorders. The amounts are effective to ameliorate or eliminate one or more symptoms of the disorders.
Methods for the identification and isolation of endothelia receptor subtypes are also provided. In particular, methods for detecting, distinguishing and isolating endothelia receptors using the disclosed compounds are provided. In particular, methods are provided for detecting, distinguishing and isolating endothelia receptors using the compounds provided herein.
In addition, methods for identifying compounds that are suitable for use in treating particular diseases based on their preferential affinity for a particular endothelia receptor subtype are also provided.
Articles of manufacture containing packaging material, a compound provided herein, which is effective for ameliorating the symptoms of an endothelia-mediated disorder, antagonizing the effects of endothelia or 77718-35(S) inhibiting binding of an endothelin peptide to an ET
receptor with an ICSO of less than about 10 ~,M, within the packaging material, and a. label that indicates that the compound or f«rmulate<i pharmaceutically-acceptable salt thereof is used for antagonizing the effects of endothelin, treating an endothelia-mediated disorder, or inhibiting the binding of an endothelia peptide to an ET receptor are provided.
According to one aspect of the present invention, there is provided a sulfonamide compound of formula (A):
Ar2-S0~ ---N----Arl H
or a pharmaceutically acceptable salt, acid or ester thereof, wherein: Ar'~ is a monocyclic or polycyclic aryl or heteroaryl group that is unsubstituted or is substituted with one or more subst.ituents in which each substituent is independently selected from the group consisting of H, NH2, N02, halide, pseudohal-ide, alkyl, alkenyl, alkynyl, arylalkyl, alkoxy, alkylaxy, alkylsulfinyl, alkylsulfonyl, aryloxy, arylamino, arylsulfinyl, arylsulfonyl, alkoxycarbonyl, aminocarbonyl, cyc:Lic alkyl, alkylcarbonyl, formyl, aryl, heteroaryl, alkoxyalkyl, alkylamino, thioalkoxy, arylcarbonyl, aryloxy, arylamino, arylthio, haloalkyl, haloaryl, substituted or unsubstituted amido, and substituted or unsubstituted ureido, in which the aryl and alkyl portions are unsubstituted or are substituted with any of the preceeding group~~, the aryl portions contain from 6 to 16 carbons, the alkyl, alkenyl and alkynyl portions are straight, branched, or cyclic chains of from 1 to 14 carbons, or are subst:it~ted with substituents RA and RB which together form -(CHz)n, where n is 3 to 6, or are substituted 77718-35(S) -36a-with substituents RA and RB which together form 1,3-butadienyl; Arz has the formula:

R.
M -.
~ ~ ,_ ,'R3 i~. 5 v X ' R \4 R
or Ri _~
z /~__ 1'~
X

R
in which M is (CHz ) mC (O) (CHz) r, (CHz) mC (0) NH (CHz) r, ( CHz ) m ( CH=CH ) ( CHz ) x- r ( CHz ;~ rnC ( O ) ( CHz ) sNH ( CHz ) r r C
( =N- OH ) ( CHz ) r r ( CHz ) mC ( O ) ( CH=CH ) sNH ( CHz ) r , CH ( OH ) ( CHz ) r , CH ( CH3 ) C
( O ) ( CHz ) r , CH ( CH3 ) C ( O ) ( CHz ) m ( CH=CH ) ( CHz ) r , ( CHz ) r , ( CHz ) r0 , ( CHz ) S ( O ) n wherein n is 0-2, C (O) O, C (O)NHC (R'z) (R1~) , C (=N-OR4°) (CHz) , C (OC (=O) R4°) (=CH) , CR4" (OH) (CHz) , C (O) (C (halo) z) , C (O) N
(lower alkyl) , C (O) C (O) , C (O) C ( lower alkyl ) 2, C (O) N (CORls) , C (O) NHC (Rlz) (Ris) , C (O) N (COzRl6) , C (O) CHR6, in which m, s and r are each independently 0 to 6, R4° is hydrogen, alkyl, alkoxy, alkoxyalkyl or haloalkyl; and Rl, RZ, R3, R4, and RS
are each independently ;elected from (i) or (ii) as follows:
(i) R1, R2, R3, and R4 are each independently selected from among H, NHR3~', CONR38R~'9, NOz, halide, pseudohalide, alkyl, alkenyl, alkynyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, alkoxy, cycloalkyl, cycloalkylalkyl, thioalkoxy, haloalkyl, alkylsulfinyl, alkylsulfonyl, alkoxycarbonyl, a_Lkylcarbonyl, alkenylthio, alkenylamino, 77718-35(S) -36b-alkenyloxy, alkenylsu:lfinyl, alkenylsulfonyl, arylaminocar-bonyl, (alkylaminocarbon.yl)alkyl, acetoxy, carboxyalkyl, carboxyalkenyl, alkylsulf:onylaminoalkyl, cyanoalkyl, acetoxyalkyl, hydroxya:lk.yl, alkyoxyalkoxy, (acetoxy)alkoxy, (hydroxy) alkoxy, -(CHz) XC: (O) NHz, a D-, L- or racemic amino acid, an O-glyycoside, a hexose or ribose, -S(O)zNHz, -(CHz) XCOOH, COz-lower alkyl, -C (O) C (O) (CHz) XCH3, -(CHz) XN (CH3) z, a sulfonyl chloride, S (O) zNHRs°, alkyl aryl, alkylheteroaryl, --(CHz ) XOH, in which x is 0 to 3, OC (O) R16, OC02R16 , NRlzR1'' , S ( O ) nRl~' , O ( CHz ) OC ( O ) ORls , OCHZCH (OCH3) O (CHz) zOC (O) R1E', and -C (O) N (H) N (H) RS°, in which Rso is hydrogen, lower alkyl or lower alkoxy; and RS is independently selected from among H, OH, NHR38, C(O)NR38R39, NHOH, NR1zR16, N3, OR16, R1°'NC (O) R16, C (O) NRlzRls, NOz, halide, pseudohalide, alkyl, alk:enyl, alkynyl, aryl, arylalkyl, heteroaryl, heteroary:lalkyl, heterocycle, alkoxy, cycloalkyl, cycloalky:lalkyl, thioa:lkoxy, haloalkyl, polyhaloalkyl, alkylsulfi.nyl, alkylsulfonyl, alkoxycarbonyl, alkylcarbonyl, alkeny:ltr:i.o, alkenylamino, alkenyloxy, alkenylsulfinyl, alkenylsulfonyl, arylaminocarbonyl, (alkylaminocarbonyl)a:lkyl., acetoxy, carboxyalkyl, carboxyalkenyl, alkylsulfonylaminoalkyl, cyanoalkyl, acetoxyalkyl, hydroxya:Lk:yl, alkyoxyalkoxy, (acetoxy)alkoxy, (hydroxy) alko.xy, -(CHz) XC (O) NHz, a D-, L- or racemic amino acid, an O-glycoside, a hexose or :ribose, -S (O) zNHz, -(CHz) XCOOH, COz-lower alkyl, -C (O) C (O) (CHz) XCH3, -(CHz) XN (CH3) z, a sulfonyl chloride, S (O) zNHRs°, C (O) Rls, COZR16, SH, S(O)nRl6 in which n is 0-2, alkylaryl, alkylheteroaryl, and --(C".Hz)XOH, in which x is 0 to 3; or (ii) at least two of R' , Rz, RB, R4, and R5, which substitute adjacent carbons on t~a~e ring, together form alkylenedioxy, alkylenethioxyoxy or alk=ylenedithioxy, which is unsubstituted or substituted by replacing one or more hydrogens with halide, lower alkyl, lower alkoxy or halo 77718-35(S) -36c-lower alkyl, and the others of R1, R2, R3, R4, and Rs are selected as in (i) ; and at least four of Rl, R2, R3, R4, and Rs are not hydrogen, unless: (a) Rl and R3 are alkyl and RS
is Rz°, which is selected from the group consisting of aryl, heteroaryl, heterocyc.Le, OH, CN, C (O) R16, C02R16, SH, S (O) nRls in which n is 0-2, a D, h or racemic amino acid, a ribose or hexose, an O-glycoside, a sulfonyl chloride, -(CHZ)XOH in which x i s 0 to 3 , NHOH , NR1zR16 , NOz , N3 , OR16 , R12NCOR16 and CONRI2Rls, then R2 and R'~ may be H; or (b) when M is -CONHC (Rlz) (Rl") -, then RL, Rz, R3, R4 and Rs may all be H; (c) when M is -COCHR6-, Arl _~s not an isoxazolyl, Rl is alkyl, and R3 and R4 form alkylenedioxy, then R2 and Rs may be H; R38 and R39 are each i:ndepenc~ently selected from hydrogen, alkyl, alkenyl, alkynyl, ary:L, haloalkyl, alkylaryl, heterocycle, arylalkyl, arylalkoxy, al.koxy, aryloxy, cycloalkyl, cycloalkenyl, and cycloalkynyl; R6 is H, carboxymethyl, or substituted or unsubst.ituted alkyl or aryl; X is S, O or NR11, where R11 contains up to 30 carbon atoms and is selected from the group consist.in.g of hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, C (O) Rls, and S (O) nRls in which n is 0-2; Rls i:~ hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, or cycloalkynyl; R11 and Rls are unsubstituted or are substituted with one or more substituents each selected independently from Z; Z is hydrogen, halide, pseudohalide, alkyl, a:lk.oxy, alkenyl, alkynyl, aryl, amino acids, primary or secondary amides, 0-glycosides, hexoses, riboses, alkylaryl, a:Lkyl.heteroaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, OH, C (O) R16, OC (O) R16, COZR1'', OCOzRI6, SH, S (O) nRl6 in which n is 0-2, NHOH, NRLZRls, NOZ, Ni, OR16, Rl'~NCOR16, or CONRI2Ris; Ris is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, 77718-35(S) -36d-cycloalkynyl, chloride, NHRS°, alkylaryl, alkylheteroaryl, or -(CHZ) XOH; R12,. which is selected independently of R11 and Z, is selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocyclc=_, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkyr..yl, C (O) R~', and S (O) nRl' in which n is 0-2; Rl' is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, a.ralkoxy, cycloalkyl, cycloalkenyl or cycloalk:ynyl; R12 and Rl~ may together form alkylene; each of R12, R'S, and R16 may be further substituted with any group those set forth for Z; and further provided that the compounds are riot selected from the group consisting of: N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-hydroxymethyl-2,4,6-trimethylpheny:Laminocarbonyl)thiophene-3-sulfonamide; N- (4-ch:Loro-3-methyl-5-isoxazolyl) -2- (3-cyano-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfon-amide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methoxycarbonyl-2,4,6-trimethylphenylaminocarbonyl)thio-phene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-carboxyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methanesulfonyl-2,4,6-tri.methylphenylaminocarbonyl)thio-phene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-(2-hydroxyethyl)-2,4,6-trimethylphenylaminocarbonyl)thio-phene-3-sulfonamide; 1~1-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-cyanomethyl-2,4,6-~rimethylphenylacetyl)thiophene-3-sul-fonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-hydroxymethyl-2,4,6-trimethylpheny:lacetyl)thiophene-3-sul-fonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-cyano-2,4,6-trimethylphenylace~tyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxa2;olyl)-2-(3-methoxycarbonyl-2,4,6-trimethylphenylacetyl)thi_ophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)--2:-(3-carboxyl-2,4,6-77718-35(S) -36e-trimethylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methanesulfonyl-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-(2-hydroxyethyl)-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-~:-~(6-methyl-2,3,4-trimethoxyphenyl-aminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-2,3,4-trimethoxyphenylaminocar-bonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxyc:arbonyl-2,3,4-trimethoxyphenyl-aminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-ca:rbc>xyl-2,3,4-trimethoxyphenylaminocar-bonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methane:~ulfonyl-2,3,4-trimethoxyphenyl-aminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-2,3,4-trimethoxyphenylamino-carbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-2,3,4-trimethoxyphenyl-aminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyano--2,3,4-trimethoxyphenylaminocar-bonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methy:l-2,3,4-trimethoxyphenylacetyl)thio-phene-3-sulfonamide; N-1:4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-2,3,4-trimethoxyphenylacetyl)thiophene-3-sulfona-mide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-2,3,4-trimethoxyphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro--3-methyl-5-isoxazolyl)-2-(6-carboxyl-2,3,4-trimetho~:yphenylacetyl)thiophene-3-sulfona-mide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-2,3,4-tz~imethoxyphenylacetyl)thiophene-3-sulfonamide; N- (4-chloro--3-methyl-5-isoxazolyl) -2- (6-cyanomethyl-2,3,4-trimet:hoxyphenylacetyl)thiophene-3-sulfon-amide; N- (4-chloro-3-me t:hyl-5-isoxazolyl) -2- (6- (2-hydroxyethyl)-2,3,4-trimethoxyphenylacetyl)thiophene-3-sul-77718-35 (S) -36f-fonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methyl-3,4-(methylenedioxy)-2-rrlethoxyphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylenedioxy)-2-methoxyphenylaminocar-bonyl)thiophene-3-sul:Eor..amide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-3,4-(methylenedioxy)-2-methoxyphenylaminocarbon.yl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxaz;olyl)-2-(6-carboxyl-3,4-(methylene-dioxy) -2-methoxypheny:Larru.nocarbonyl) thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4-(methylenedio:xy)-2-mer_hoxyphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chlo:ro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-3,4-(methylenedioxy)-2-methoxyphenylaminocar-bonyl)thiophene-3-sul:Eon.amide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-3,4-(methylenedioxy)-2-methoxyphenylaminocarbon.yl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxaz.olyl)-2-(6-cyano-3,4-(methylene-dioxy) -2-methoxyphenylarrcinocarbony:L) thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,6-dimethyl-3,4-(methylenedioxy)phenylarrci.nocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylenedioxy)-2-methyl.phenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-3,4-(methylenedioxy)-2-methylphenylaminocar-bonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-carboxyl.-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl.)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4-(methylenedioxy)-2-methyl.phenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-3,4-(methylenedioxy)-2-methylphenylaminocar-bonyl)thiophene-3-sul.fon.amide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl.)thiophene-3-sulfonamide; N-(4-77718-35 (S) -36g-chloro-3-methyl-5-isoxaz;alyl)-2-(6-cyano-3,4-(methylene-dioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxy-3,4-(methylenedioxy)-2-methyl.phenylaminocarbonyl)thiophene-3-sulfonamide; :~T- (4-chlaro-3-methyl-5-isoxazolyl) -2- (2-cyano-3,4-(methylenedioxy)-6-methylpheny:Laminocarbonyl)thiophene-3-sulfonamide; N-(4-clzloro-3-methyl-5-isoxazolyl)-2-(2-cyano-3,4-(methylenediax:~.~)-6-methoxyphenylaminocar-bonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-acety:l-3,4-(methylenedioxy)-6-methylphenyl-aminocarbonyl)thiophene-~-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl) -2- (2-acc=ty-1.-3, 4- (methylenedioxy) -6-methoxyphenylaminocarban.yl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazalyl)-2-(6-methyl-3,4-(methylene-dioxy)-2-methaxypheny:Lacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylene-dioxy)-2-methaxyphenylace~tyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5~-isoxazalyl)-2-(6-methoxycarbonyl-3,4-(methylenedioxy)-2-met~hcxyphenylacetyl)thiophene-3-sulfona-mide; N-(4-chloro-3-meth.yl-5-isoxazolyl)-2-(6-carboxyl-3,4-(methylenedioxy)-2-methoxyphenylacetyl)thiophene-3-sulfona-mide; N-(4-chloro--3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4-(rnethylenedioxy)-2-methoxyphenylacetyl)thiaphene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-3,4-(methylenedioxy)-2-methoxyphenylacetyl)th.iophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-3,4-(methylene-dioxy)-2-methoxypheny=Lacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazalyl)-2-(6-cyano-3,4-(methylene-dioxy)-2-methoxypheny_Lacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazalyl)-2-(2,6-dimethyl-3,4-(methylenedioxy)pheny:Lacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methvyl-5-iso:~azalyl)-2-(6-acetyl-3,4-(methylene-dioxy)-2-methylphenylacet.yl)thiophene-3-sulfonamide; N-(4-'77718-35 (S) -36h-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-3,4-(methylenedioxy)-2.-methylphenylacetyl)thiophene-3-sulfona-mide; N-(4-ch:loro-3-methyl-5-isoxazolyl)-2-(6-carboxyl-3,4-(methylenedioxy)-2-methylphenylacetyl)thiophene-3-sulfona-mide; N-(4-ch:loro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4-(rnethylenedioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-3,4-(methylenedioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-3,4-(methylene-dioxy)-2-methylphenylacet.yl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazc>lyl)-2-(6-cyano-3,4-(methylene-dioxy)-2-methylphenylacet.yl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5~-isoxazolyl)-2-(6-methoxy-3,4-(methylene-dioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-cyano-3,4-(methylene-dioxy)-6-methylphenylacet.yl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-cyano-3,4-(methylene-dioxy)-6-methoxypheny:lacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxaz:olyl)-2-(2-acetyl-3,4-(methylene-dioxy)-6-methylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxaz;olyl)-2-(2-acetyl-3,4-(methylene-dioxy)-6-methoxypheny:Lacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxaz;olyl)-2-(2,6-bis(cyanomethyl)-3,4-(methylenedioxy)pheny:laminocarbonyl)thiophene-3-sulfonamide;
N- (4-bromo-3-methyl-5-i~;oxazolyl) -2- (N-benzylaminocarbonyl)thic>phene-3-sulfonamide.
According to another aspect of the present invention, there is provided a sulfonamide compound of formula (A) Ar2SO., _-NArl H

77718-35 (S) -36i-or a pharmaceutically ac:r_eptable salt, acid or ester thereof, wherein: Arl is a monocyclic or polycyclic aryl or heteroaryl group that i~~ unsubstituted or is substituted with one or more substit:uents in which each substituent is independently selected f=rom the group consisting of H, NH2, NO2, halide, pseudohalide, alkyl, a:lkenyl, alkynyl, arylalkyl, alkoxy, alky7_oxy, alkylsulfinyl, alkylsulfonyl, aryloxy, arylamino, ary7.sulfinyl, arylsulfonyl, alkoxycarbonyl, aminocax~bonyl, cyclic alkyl, alkylcarbonyl, formyl, aryl, heteroary7., alkoxyalkyl, alkylamino, thioalkoxy, arylcarbo.nyl., aryloxy, arylamino, arylthio, haloalkyl, haloaryl, substituted or unsubstituted amido, and substituted or unsubstit:uted ureido, in which the aryl and alkyl portions are unsubstituted or are substituted with any of the preceeding groups, the aryl portions contain from 6 to 16 carbons, the alkyl., alkenyl and alkynyl portions are straight, branched, or cyclic chains of from 1 to 14 carbons, or are substituted with substituents RA and RB which together form -(CHz)n, where n is 3 to 6, or are substituted with substituents RA and RH which together form 1,3-butadienyl; Ar2 has the formula:

Rz ~ ~ ,R3 s X ~ R
or Ri C. ,~ -__ ~~, X
R

R

77718-35(S) -36j-in which M is (CHz ) mC (O) (CHz) r, (CHz) mC (O) NH (CHZ) r, ( CHz ) m ( CH=CH ) ( CHz ) r , ( C:Hz .~ mC ( O ) ( CHz ) SNH ( CHz ) r , C ( =N- OH ) ( CHz ) r i (CHz) mC (O) (CH=:CH) SNH (CHz) r, CH (OH) (CHz) r, CH (CH3) C (O) (CHz) ri CH ( CH3 ) C ( O ) ( CHz ) m ( CH=CH ) ( CHz ) r , ( CHz ) r , ( CHz ) rO , ( CHz ) S ( O ) n wherein n is 0-2, C (O) O, C (O)NHC (R~') (R16) , C (=N-OR4°) (CHz) , C (OC (=O) R4°) (=:CH) , CR4° (OH) (CHz) , C (O) (C (halo) z) , C (O) N (lower alkyl ) , C (O) C (O) , C (O) C ( lower alkyl ) z, C (O) N (CORls) , C (O) NHC (Rlz) (R_16) , C (O) N (C02R16) , C (O) CHR6, in which m, s and r are each independently C to 6, R4° is hydrogen, alkyl, alkoxy, alkoxyalkyl o:r haloalkyl; and R1, Rz, R3, R4 and RS
are each independently ;elected from (i) or (ii) as follows:
(i) R1, Rz, R3, and R4 are each independently selected from among H, NHR3E', CONR38R39, NOz, halide, pseudohalide, alkyl, alkenyl, alkynyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, alkoxy, cycloalky:l, cycloalkylalkyl, thioalkoxy, haloalkyl, a.l.kylsulfinyl, alkylsulfonyl, alkoxycarbonyl, alkylcarbonyl, alkenylthio, alkenylamino, alkenyloxy, alkenylsu_Lfinyl, alkenylsulfonyl, arylaminocar-bonyl, (alkylaminocarbon.yl)alkyl, acetoxy, carboxyalkyl, carboxyalkenyl, alkyl;~ulfonylaminoalkyl, cyanoalkyl, acetoxyalkyl, hydroxyalk.yl, alkyoxyalkoxy, (acetoxy)alkoxy, (hydroxy) alkoxy, -(CH;~) XC (O) NHz, a D-, L- or racemic amino acid, an 0-glycoside, a hexose or ribose, -S(O)zNHz, -(CHz) XCOOH, COz-lower alkyl, -C (O) C (O) (CHz) XCH3, -(CHz) XN (CH3) z, a sulfonyl chloride, S (O) zNHRs°, alkylaryl, alkylheteroaryl, --(CH;;) XOH, in which x is 0 to 3, OC (O) Rls, OCOzRI6 , NRlzR1" , S ( O ) nRm , O ( CHz ) OC ( O ) OR16 , OCHZCH (OCH3) 0 (CHz) zOC (O) RLf', and -C (O) N (H) N (H) RS°, in which RS° is hydrogen, lower a7_kyl or lower alkoxy; and RS is independently selected from among H, OH, NHR38, C(O)NR38R39, NHOH, NRlzRls, N3, OR16, RL°°NC (O) R16, C (O) NR1zR16, NOz, halide, pseudohalide, alkyl, a:lk.enyl, alkynyl, aryl, arylalkyl, '77718-35 (S) -36k-heteroaryl, heteroaryla7.kyl, heterocycle, alkoxy, cycloalkyl, cycloalkyla7.kyl, thioalkoxy, haloalkyl, polyhaloalkyl, alkylsulf:inyl, alkylsulfonyl, alkoxycarbonyl, alkylcarbonyl, alkenylthio, alkenylamino, alkenyloxy, alkenylsulfinyl, alke:nyl.sulfonyl, arylaminocarbonyl, (alkylaminocarbonyl)alk~Tl, acetoxy, carboxyalkyl, carboxyalkenyl, alkylsul.fonylaminoalkyl, cyanoalkyl, acetoxyalkyl, hydroxy~alk:yl, alkyoxyalkoxy, (acetoxy)alkoxy, (hydroxy) alkoxy, --(CH,) XC (O) NH2, a D-, L- or racemic amino acid, an O-glycoside, a hexose or ribose, -S(O)zNH2, -(CHZ) XCOOH, C'02-lower alkyl, -C (O) C (O) (CH2) XCH3, -(CHZ) XN (CH3) z, a sulfonyl chloride, S (O) zNHRs°, C (O) Rls, C02R16, SH, S (O) nRl6 in which n is 0-2, alkylaryl, alkylheteroaryl, and --(C'H~)XOH in which x is 0 to 3; or (ii) at least two of Rl, R2, RB, R4 and R5, which substitute adjacent carbons on the ring, together form alkylenedioxy, alkylenethioxyoxy or <~:Lk_ylenedithioxy, which is unsubstituted or subs~ituted by replacing one or more hydrogens with halide, lower alkyl, lower alkoxy or halo lower alkyl, and the otr.e.rs of Rl, R2, R3, R4 and RS are selected as i:n (i) ; and at least four of Rl, R2, R3, R4 and RS
are not hydrogen, unless: (a) R1 and R3 are alkyl and RS is RZ°, which is selected from the group consisting of aryl, heteroaryl, heterocycle, OH, CN, C (O) R16, CO2R16, SH, S (O) nRls in which n is 0-2, a D, L or racem:ic amino acid, a ribose or hexose, an O-glycoside, a sulfonyl chloride, -(CHZ)XOH in which x is 0 'to 3, NHOH, NRl~Rls, NO2, N3, OR16, RizNCORI6, and CONRI2Rls, then Rz and R4 may be H; or (b) when M is -CONHC (R12) (R1~') -, then R1, R2, R3, R4 and RS may all be H; (c) when M is -CO~~HR6-, Ar' ~_s not an isoxazolyl, Rl is alkyl, and R3 and R4 form alkylenedioxy, then R2 and RS may be H; R3e and R39 are each independently selected from hydrogen, alkyl, alkenyl, alkynyl, ary:L, haloalkyl, alkylaryl, heterocycle, arylalkyl, arylalkoxy,, alkoxy, aryloxy, cycloalkyl, 77718-35(S) cycloalkenyl, and cyc:loa.lkynyl; R6 is H, carboxymethyl, or substituted or unsubstituted alkyl or aryl; X is S, O or NR11, where R11 contains up to 30 carbon atoms and is selected from the group consis~ir~g of hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl , cycloalkynyl, C (O) R15, and S (O) nRls in which n is 0-2; R15 is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, hete:rocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, or cycloalkynyl; R11 and R15 are unsubstituted or are substituted with one or more substituents each selected independently from Z; Z is hydrogen, halide, pseudohalide, alkyl, alk:oxy, alkenyl, alkynyl, aryl, amino acids, primary and secondary amides, O-glycosides, hexoses, riboses, alkylaryl, a:lky7.heteroaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, OH, C (O) R16, OC (O) R16, COZR1°, OC02R16, SH, S (O) nRl6 in which n is 0-2 , NHOH, NRlzRis , NOz , N3 , OR16 , RIZNCOR16 and CONRIZRis ; Ris i s hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, chloride, NHRS°, alkylaryl, alkylheteroaryl, or -(CHz)XOH; Rlz, which is selected independently of R11 and Z, is selected from alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, C (O) R1', and S (O) nRl' in which n is 0-2; R1' is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl or cycloalkynyl; Rlz and R.16 may together form alkylene; each of Rlz~ Rls and R''6 may be further substituted with any group those set forth for Z; and further provided that the compounds are not selected from the group consisting of: N-(4-chloro-3-methyl-5-isc>xazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxa~;olyl)-2-(3-hydroxymethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-77718-35(S) -36m-chloro-3-methyl-5-isoxa2;oly1)-2-(3-cyano-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxa~;olyl)-2-(3-methoxycarbonyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5--isoxa2;olyl)-2-(3-carboxyl-2,4,6-trimethylphenylaminocar~>onyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxa2;alyl)-2-(3-methanesulfonyl-2,4,6-trimethylphenylaminocar~>onyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxa2~olyl)-2-(3-(2-hydroxyethyl)-2,4,6-trimethylphenylaminocarbanyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-iso:Kazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-~(3-hydroxymethyl-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)--2-(3-cyano-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methoxycarbonyl-2,4,6-trimethylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-carboxyl-2,4,6-trimethylphenylacetyl)tr.i.ophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methanesulfonyl-2,4,6-trimethylphemylacetyl)tr.iophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-(2-hydroxyethyl)-2,4,6-trimethylphemylacetyl)tr.s.ophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methyl-2,3,4-trimethoxyphenyl-aminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-2,3,4-trimethoxyphenylaminocar-bonyl)thiophene-3-sul:Eor..amide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-2,3,4-trimethoxyphenyl-aminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-carboxyl-2,3,4-trimethoxyphenylaminocar-bonyl)thiophene-3-sul:Eor..amide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-2,3,4-trimethoxyphenyl-aminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-'77718-35 (S) -36n-5-isoxazolyl)-2-(C-cyanomethyl-2,3,,4-trimethoxyphenylamino-carbonyl)thiophene-3-;sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hvdraxyethyl)-:?,3,4-trimethoxyphenyl-aminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyano-2,3,4-trimethoxyphenylaminocar-bonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methyl-2,3,4-trimethoxyphenylacetyl)thio-phene-3-sulfonamide; N--(4-chloro-3--methyl-5-isoxazolyl)-2-(6-acetyl-2,3,4-trimet=hoxyphenylacetyl)thiophene-3-sulfona-mide; N-(4-ch:loro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-2,3,4--trimethoxyphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-carboxyl-2,3,4-trimethoxyphenylacetyl)thiophene-3-sulfona-mide; N-(4-ch:loro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-2,3,4~-trimethoxyphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-2,3,4--trimethoxyphenylacetyl)thiophene-3-sulfon-amide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-2,3,4-trim;ethoxyphenylacetyl)thiophene-3-sul-fonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methyl-3,4-(methylenedioxy)-2-rr~ethoxyphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chlcro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylened:ioxy)-2-methoxyphenylaminocar-bonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxycarbonyl-3,4-(methylenedioxy)-2-methoxyphenylaminocarbon.yl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-carboxyl-3,4-(methylene-dioxy)-2-methoxypheny:Larni.nocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4-(methylenedioxy)-2-mei~hoxyphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-3,4-(methy:lenedioxy)-2-methoxyphenylaminocar-bonyl)thiophene-3--sulfon-amide; N-(4-chloro-3-methyl-5-isoxazolyl) -2- (6- (2-hydroxyethyl) -3, 4- (methylenedioxy) -2-'77718-35 (S) methoxyphenylaminocarbon.~.~1)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyano-3,4-(methylene-dioxy)-2-methoxypheny:Lami.nocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,6-dimethyl-3,4-(methylenedioxy) pheny:Larr~inocarbony:l ) thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide; N- (4--chlo:r_o-3-methyl-5-isoxazolyl) -2- (6-methoxycarbon~yl-3,4-(rnethylenedioxy)-2-methylphenylaminocar-bonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-carboxyl-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazc>lyl)-2-(6-methanesulfonyl-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-cyanomethyl-3,4-(methylenedioxy)-2-methylphenylaminocar-bonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6--cyano-3,4-(methylene-dioxy)-2-meth°ylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methoxy-3,4-(methylenedioxy)-2-methylphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-cyano-3, 4- (methylenedioxy) -f~--m,ethylphenylaminocarbonyl) thiophene-3-sulfonamide; N- (4-ch.Loro-3-methyl-5-isoxazolyl) -2- (2-cyano-3,4-(methylenedioxy)-6-methoxyphenylaminocar-bonyl)thiophene-3--sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-acety:l-3,4-(methylenedioxy)-6-methylphenyl-aminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-acetyl-3,4-(methylenedioxy)-6-methoxyphenylaminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5--isoxazolyl)-2-(6-methyl-3,4-(methylene-dioxy)-2-methoxyphenylacetyl)thiophene-3-sulfonamide; N-(4-77718-35(S) -36p-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylene-dioxy)-2-methoxypheny:Lacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5--isoxazolyl)-2-(6-methoxycarbonyl-3,4-(methylenedio:xy)-2-methoxyphenylacetyl)thiophene-3-sulfona-mide; N-(4-chloro-3-meth.yl-5-isoxazolyl)-2-(6-carboxyl-3,4-(methylenedioxy)-2-methoxyphenylacetyl)thiophene-3-sulfona-mide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4-(methylenedioxy)-2-methoxyphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2--(6-cyanomethyl-3,4-(methylenedioxy)-2-methoxyphenylacetyl)th.iophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)--2-(6-(2-hydroxyethyl)-3,4-(methylene-dioxy)-2-methoxypheny:Lacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-iso:~azalyl)-2-(6-cyano-3,4-(methylene-dioxy)-2-methoxypheny:Lacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxaz:olyl)-2-(2,6-dimethyl-3,4-(methylenedio:xy)pheny:Lacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-acetyl-3,4-(methylene-dioxy) -2-methylphenylacet:yl) thiophene-3-sulfonamide; N- (4-chloro-3-methyl-5--isoxaz;olyl)-2-(6-methoxycarbonyl-3,4-(methylenedio:xy)-2-methylphenylacetyl)thiophene-3-sulfona-mide; N-(4-chloro--3-metr~yyl-5-isoxazolyl)-2-(6-carboxyl-3,4-(methylenedioxy)-2-me~hyl.phenylacetyl)thiophene-3-sulfona-mide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-methanesulfonyl-3,4-(met.hylenedioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(E>-cyanomethyl-3,4-(methylenedioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(6-(2-hydroxyethyl)-3,4-(methylene-dioxy)-2-methylphenylace~tyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxa2;oly1)-2-(6-cyano-3,4-(methylene-dioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxa~:olyl)-2-(6-methoxy-3,4-(methylene-dioxy)-2-methylphenylacetyl)thiophene-3-sulfonamide; N-(4-76307-148 (S) -36q-chloro-3-methyl-5-isoxazolyl)-2-(2-cyano-3,4-(methylene-dioxy)-6-methoxyphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-acetyl-3,4-(methylene-dioxy)-6-methylphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-acetyl-3,4-(methylene-dioxy)-6-methoxyphenylacetyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,6-bis(cyanomethyl)-3,4-(methylenedioxy)phenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-bromo-3-methyl-5-isoxazolyl)-2-(N-benzylaminocarbonyl)thiophene-3-sulfonamide.
According to one aspect of the present invention, there is provided a sulfonamide compound or a pharmaceutically acceptable salt or acid thereof, wherein the compound has formula (IV):
(IV) or Arl S0, NH

76307-148(S) -36r-wherein: Arl has formula:
RA RB RA RB
iIN o r w ~0 wherein RA and RB are each independently selected from among lower alkyl, lower alkenyl, lower alkynyl, lower haloalkyl, halide, pseudohalide and H, with the proviso that (i) RB is not halide; and (ii) Arl is not 4-chloro-3-methyl-5-isoxazolyl, 4-chloro-5-methyl-3-isoxazolyl or 3,4-dimethyl-5-isoxazolyl.
According to another aspect of the present invention, there is provided a sulfonamide compound or a pharmaceutically acceptable salt or acid thereof, wherein the compound has formula (V):

R~
S
O
Me ~ Me or Me (V) 76307-148(S) -36s-wherein: Arl has formula:
R" RB RA RB
o r ~ ~a wherein RA and RB are each independently selected from among lower alkyl, lower alkenyl, lower alkynyl, lower haloalkyl, halide, pseudohalide and H, with the proviso that RB is not halide; W is -NH-; and Rz° is selected from the group consisting of C4-C14-aryl, hetero-C4-C14-aryl, heterocycle, OH, CN, C (O) R16, COzRl6, SH, S (O) nRls in which n is 0-2 , a D, L
or racemic amino acid, a ribose or hexose, an O-glycoside, a sulfonyl chloride, -(CHz) XOH, NHOH, NRlzRls, NOz, N3, ORls, RIZNCOR16, and CONR1zR16; Rls is hydrogen, Cl-Clz-alkyl, Cz-Clo-alkenyl, Cz-Clo-alkynyl, C4-C14-aryl, C1-Clz-alkyl-C4-C14-aryl, heterocycle, C4-C14-aryl-C1-Clz-alkyl, C4-C14-aryl-C1-C1z-alkoxy, C3-Clz-cycloalkyl, C4-Clo-cycloalkenyl or C4-C1o-cycloalkynyl; Rlz is selected from hydrogen, C1-Clz-alkyl, Cz-Clo-alkenyl, Cz-Clo-alkynyl, C4-C14-aryl, Cl-Clz-alkyl-C4-C14-aryl, heterocycle, C4-C14-aryl-C1-Clz-alkyl, C4-C14-aryl-C1-Clz-alkoxy, C3-Clz-cycloalkyl, C4-Clo-cycloalkenyl, C4-Clo-cycloalkynyl, C (O) Rl', and S (O) nRl' in which n is 0-2; Rl' is hydrogen, Cl-Clz-alkyl, Cz-Clo-alkenyl, Cz-Clo-alkynyl, Cg-C14-aryl, C1-Clz-alkyl-C4-C14-aryl, heterocycle, C4-C14-aryl-C1-Clz-alkyl, C4-C14-aryl-C1-Clz-alkoxy, C3-C1z-cycloalkyl, C4-Clo-cycloalkenyl or C4-Clo-cycloalkynyl; each of Rlz, Rls, and Rl' may be further substituted with a substituent selected from halide, pseudohalide, C1-Clz-alkyl, C1-Clz-alkoxy, Cz-Clo-alkenyl, Cz-Clo-alkynyl, C4-C~4-aryl, amino acids, primary or secondary amides, O-glycosides, hexoses, riboses, C1-Clz-alkyl-C4-C14-aryl, C1-Clz-alkylhetero-C4-C14-aryl, heterocycle, C4-C14-aryl-C1-Clz-alkyl, C4-C14-aryl-C1-Clz-alkoxy, C3-Clz 76307-148(S) -36t-cycloalkyl, C4-Clo-cycloalkenyl, C4-Clo-cycloalkynyl, OH, SH, NHOH, and NO2; and x is 0 to 3.
According to still another aspect of the present invention, there is provided the sulfonamide compound N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,4-dimethyl-6-aminocarbonylphenylaminocarbonyl)-thiophene-3-sulfonamide or a pharmaceutically acceptable salt or acid thereof.
According to yet another aspect of the present invention, there is provided the sulfonamide compound 3-(4-chloro-3-methyl-5-isoxazolyl) sulfamoyl-NZ-(2-carboxyl-4,6-dimethyl)phenyl-2-thiophenecarboxamide or a pharmaceutically acceptable salt or acid thereof.
According to a further aspect of the present invention, there is provided the sulfonamide compound 3-(4-chloro-3-methyl-5-isoxazolyl) sulfamoyl-NZ-(2-phenyl-4,6-dimethyl)phenyl-2-thiophenecarboxamide or a pharmaceutically acceptable salt or acid thereof.
According to yet a further aspect of the present invention, there is provided the sulfonamide compound N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide or a pharmaceutically acceptable salt or acid thereof.
According to still a further aspect of the present invention, there is provided a use of a sulfonamide compound described herein for treatment or prophylaxis of an endothelin-mediated disease in a mammal.
According to another aspect of the present invention, there is provided a use of a sulfonamide compound described herein in manufacture of a medicament for treatment or prophylaxis of an endothelin-mediated disease.

76307-148(S) -36u-According to yet another aspect of the present invention, there is provided a use of a composition described herein for treatment or prophylaxis of an endothelin-mediated disease in a mammal.
According to another aspect of the present invention, there is provided a use of a powder described herein for treatment or prophylaxis of an endothelin-mediated disease in a mammal.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Definitions Unless defined otherwise, all technical and scientific terms used herein have the same meaning as is commonly understood by one of skill in the art to which this invention belongs.
As used herein, endothelin (ET) peptides include peptides that have substantially the amino acid sequence of endothelin-1, endothelin-2 or endothelin-3 and that act as potent endogenous vasoconstrictor peptides.
As used herein, an endothelin-mediated condition is a condition that is caused by abnormal endothelin activity or one in which compounds that inhibit endothelin activity have therapeutic use. Such diseases include, but are not limited to hypertension, cardiovascular disease, asthma, inflammatory diseases, ophthalmologic disease, menstrual disorders, obstetric conditions, gastroenteric disease, renal failure, pulmonary hypertension, endotoxin shock, anaphylactic shock, or hemmorrhagic shock.
Endothelin-mediated conditions also include conditions that result from therapy with agents, such as erythropoietin and immunosuppressants, that elevate endothelin levels.

76307-148(S) -36v-As used herein, an effective amount of a compound for treating a particular disease is an amount that is sufficient to ameliorate, or in some manner reduce the symptoms associated with the disease. Such amount may be administered as a single dosage or may be administered according to a regimen, whereby it is effective. The amount may cure the disease but, typically, is administered in order to ameliorate the symptoms of the disease.

Typically, repeated administration is required to achieve the desired amelioration of symptoms.
As used herein, an endothelia agonist is a compound that potentiates or exhibits a biological activity associated with or possessed by an endothelia peptide.
As used herein, an endothelia antagonist is a compound, such as a drug or an antibody, that inhibits endothelia-stimulated vasoconstriction and contraction and other endothelia-mediated physiological responses. The antagonist may act by interfering with the interaction of the endothefin with an endothelia-specific receptor or by interfering with the physiological response to or bioactivity of an endothelia isopeptide, such as vasoconstriction. Thus, as used herein, an endothelia antagonist interferes with endothelia-stimulated vasoconstriction or other response or interferes with the interaction of an endothelia with an endothelia-specific receptor, such as ETA receptors, as assessed by assays known to those of skill in the art.
The effectiveness of potential agonists and antagonists can be assessed using methods known to those of skill in the art. For example, endothelia agonist activity can be identified by its ability to stimulate vasoconstriction of isolated rat thoracic aorta or portal vein ring segments (Borges et al. (1989) "Tissue selectivity of endothelia" Eur. J. Pharmacol. 165: 223-230).
Endothelia antagonist activity can be assessed by the ability to interfere with endothelia-induced vasoconstriction. Exemplary assays are set forth in the EXAMPLES. As noted above, the preferred ICSO concentration ranges are set forth with reference to assays in which the test compound is incubated with the ET receptor-bearing cells at 4° C. Data presented for assays in which the incubation step is performed at the less preferred 24° C are identified. It is understood that for purposes of comparison, these concentrations are somewhat higher than the concentrations determined at 4° C.
As used herein, bioavailability refers to the rate and extent of absorption. Methods for determining bioavailability are well known to those of skill in the art. For example, bioavailability of any of the compounds described herein can be determined empirically by administration of the compound to an animal, followed by taking blood samples over time and measuring the blood concentration of the compound. In vivo half life (t"2) is defined as the time it takes for the concentration of the compound in the blood to be reduced by one-half. Estimations of the area under the curve for intravenous administration can be used to estimate the area under the curve for oral administration, yielding bioavailability data. See, e~g., Milo Gibal ( 1991 ) Biopharmaceutics and Pharmacology, 4th edition (Lea and Sediger).
As used herein, efficacy refers to the maximal effect that can be produced by a compound. Efficacy can be determined by methods known to those of skill in the art. For example, it cna be determined by the properties of the compound and its receptor-effector system and is reflected in the plateau of the concentration-effect curve. In vivo efficacy refers to efficacy which is determined in an animal model. For example, in vivo efficacy of the compounds described herein can be determined by hypoxia-induced pulmonary hyupertension in rat. See, e-g., DiCarlo et al. ( 1995) Am. J.
Physiol. 269:L690-L697.
As used herein, the biological activity or bioactivity of endothelin includes any activity induced, potentiated or influenced by endothelin in vivo.
It also includes the ability to bind to particular receptors and to induce a functional response, such as vasoconstriction. It may be assessed by in vivo assays or by in vitro assays, such as those exemplified herein. The relevant activities include, but are not limited to, vasoconstriction, vasorelaxation and bronchodilation. For example, ETg receptors appear to be expressed in vascular endothelial cells and may mediate vasodilation and other such responses; whereas ETA receptors, which are endothelin-1-specific, occur on smooth muscle and are linked to vasoconstriction Any assay known to those of skill in the art to measure or detect such activity may be used to assess such activity (see, e-a., Spokes et al. (1989) J. Cardiovasc. Pharmacol.
13(Suppl. 51:S191-S192; Spinella et al. (1991) Proc. Natl. Acad. Sci. USA
r __.. _ .___.~_--w..._.__ _.. _._.__...

88: 7443-7446; Cardell et al. ( 1991 ) Neurochem. Int. 18:571-574); and the Examples herein).
As used herein, the ICSO refers to an amount, concentration or dosage of a particular test compound that achieves a 50% inhibition of a maximal response, such as binding of endothelin to tissue receptors, in an assay that measures such response.
As used herein, ECSO refers to a dosage, concentration or amount of a particular test compound that elicits a dose-dependent response at 50% of maximal expression of a particular response that is induced, provoked or potentiated by the particular test compound.
As used herein a sulfonamide that is ETA selective refers to sulfona-mides that exhibit an ICSO that is at least about 10-fold lower with respect to ETA receptors than ETB receptors.
As used herein, a sulfonamide that is ETB selective refers to sulfona-mides that exhibit an ICSO that is at least about 10-fold lower with respect to ET$ receptors than ETA receptors.
As used herein, pharmaceutically acceptable salts, esters, hydrates, solvates or other derivatives of the compounds include any such salts, esters and other derivatives that may be prepared by those of skill in this art using known methods for such derivatization and that produce compounds that may be administered to animals or humans without substantial toxic effects and that either are pharmaceutically active or are prodrugs. Pharmaceutically-acceptable salts include, but are not limited to, salts of alkali metals and alkaline earth metals, including but not limited to sodium salts, potassium salts, lithium salts, calcium salts and magnesium salts; transition metal salts, such as zinc salts, copper salts and aluminum salts; polycationic counter ion salts, such as but not limted ammonium and substituted ammonium salts and organic amine salts, such as hydroxyalkylamines and alkylamines; salts of mineral acids, such as but not limited to hydrochlorides and sulfates, salts of organic acids, such as but not limited acetates, lactates, malates, tartrates, citrates, ascorbates, succinates, butyrate, valerate and fumarates. Also contemplated herein are the corresponding esters.
As used herein, reference to "sodium salts" refers to salts of any sodium compounds in which the counter ion includes Na+ and can include other ions, such as HP042~; reference to a "sodium salt" (rather than sodium salts) refers specifically to a salt in which Na+ is the counter ion.
As used herein, treatment means any manner in which the symptoms of a conditions, disorder or disease are ameliorated or otherwise beneficially altered. Treatment also encompasses any pharmaceutical use of the compositions herein, such as use as contraceptive agents.
As used herein, treatment means any manner in which the symptoms of a conditions, disorder or disease are ameliorated or otherwise beneficially altered. Treatment also encompasses any pharmaceutical use of the compositions herein, such as use as contraceptive agents.
As used herein, amelioration of the symptoms of a particular disorder by administration of a particular pharmaceutical composition refers to any lessening, whether permanent or temporary, lasting or transient that can be attributed to or associated with administration of the composition.
As used herein, substantially pure means sufficiently homogeneous to appear free of readily detectable impurities as determined by standard methods of analysis, such as thin layer chromatography (TLC), gel electrophoresis and high performance liquid chromatography (HPLC), used by those of skill in the art to assess such purity, or sufficiently pure such that further purification would not detectably alter the physical and chemical properties, such as enzymatic and biological activities, of the substance.
Methods for purification of the compounds to produce substantially chemically pure compounds are known to those of skill in the art. A
substantially chemically pure compound may, however, be a mixture of stereoisomers. In such instances, further purification might increase the specific activity of the compound.

As used herein, biological activity refers to the in vivo activities of a compound or physiological responses that result upon in vivo administration of a compound, composition or other mixture. Biological activity, thus, encompasses therapeutic effects and pharmaceutical activity of such compounds, compositions and mixtures.
As used herein, increased stability of a formulation means that the percent of active component present in the formulation, as determined by assays known to those of skill in the art, such as high performance liquid chromatography, gas chromatography, and the tike, at a given period of time following preparation of the formulation is significantly higher than the percent of active component present in another formulation at the same period of time following preparation of the formulation. In this case, the former formulation is said to possess increased stability relative to the latter formulation.
As used herein, a prodrug is a compound that, upon in vivo administration, is metabolized or otherwise converted to the biologically, pharmaceutically or therapeutically active form of the compound. To produce a prodrug, the pharmaceutically active compound is modified such that the active compound will be regenerated by metabolic processes. The prodrug may be designed to alter the metabolic stability or the transport characteristics of a drug, to mask side effects or toxicity, to improve the flavor of a drug or to alter other characteristics or properties of a drug. By virtue of knowledge of pharmacodynamic processes and drug metabolism in vivo, those of skill in this art, once a pharmaceutically active compound is known, can design prodrugs of the compound (see, e-a., Nogrady (1985) Medicinal Chemistry A Biochemical Aaproach, Oxford University Press, New York, pages 388-392). For example, succinyl-sulfathiazole is a prodrug of 4-amino-N-(2-thiazoyi)benzenesulfonamide (sulfathiazole) that exhibits altered transport characteristics.
As used herein, acid isostere means a group that is significantly ionized at physiological pH. Examples of suitable acid isosteres include suifo, 77718-35(S) phosphono, alkylsulfonylcarbamoyl, tetrazolyl, arylsulfonylcarbamoyl or heteroarylsulfonylcarbamoyl.
As used herein, halo or halide refers to the halogen atoms; F, Cl, Br and I.
As used herein, pseudohalides are compounds that behave substantially similar to halides. Such compounds can be used in the same manner and treated in the same manner as halides (X, in which X is a halogen, such as Cl or Br).
Pseudohalides include, but are not limited to cyanide, cyanate, thiocyanate, selenocyanat.e and azide.
As used herein, haloalkyl refers to a loweralkyl radical in which one or more of the hydrogen atoms are replaced by halogen including, but not limited to, chloromethyl, trifluoromethyl, 1-chloro-2-fluoroethyl and the like.
As used herein, alkyl means an aliphatic hydrocarbon group that is a straight or branched chain preferably having about 1 to 12 carbon atoms in the chain. Preferred alkyl groups are loweralkyl groups which are alkyls containing 1 to about 6 carbon atoms in the chain. Branched means that one or more loweralkyl groups such as methyl, ethyl or propyl are attached to a linear alkyl chain or include cyclic portions or be cyclic. Substituted alkyl groups are independently substituted by one or more groups, such as, but not limited to:
halo, carboxy, formyl, sulfo, sulfino, carbamoyl, amino and imino. Exemplary alkyl groups include methyl, ethyl, pro;pyl, methanoic acid, ethanoic: acid, propanoic acid, ethanesulfinic acid and ethane sulfonic acid.

77718-35(S) -42a-As used herein the term lower describes alkyl, alkenyl and alkynyl groups containing about 6 carbon atoms or fewer. It is also used t:o describe aryl groups or heteroaryl groups that contain 6 or fewer atoms in the ring. Loweralkyl, lower alkenyl, and lower alkyny:L refer to carbon chains having less than about 6 carbons. In preferred embodiments of the compounds provided herein that include alkyl, alkenyl, or alkynyl portions include loweralkyl, lower alkenyl, and lower alkynyl portions.
As used herein, alkenyl means an aliphatic hydrocarbon group containing a carbon-carbon double bond and which may be straight or 77718-35(S) branched chained having from about 2 to about 10 carbon atoms in the chain.
Preferred alkenyl groups have 2 to about 4 carbon atoms in the chain.
Branched means that one or more loweralkyl or lower alkenyt groups are attached to a linear alkenyl chain. Subst.itu.ted alkenyl groups arE~
independently substituted by one or more groups, such as halo, carboxy, formyl, sulfo, sulfino, carbamoyl, amino and imino. Exemplary alkenyl groups include ethenyl, propenyl, carboxyethenyl, carboxypropenyl, sulfinoethenyl and sulfonoethenyt.
As used herein, alkynyl means an aliphatic hydrocarbon group containing a carbon-carbon triple bond and which may be straight or branched having about 2 to 10 carbon atoms in the chain. Branched means that one or more loweralkyl, alkenyl or alkynyl groups are attached to a linear alkynyl chain. An exemplary alkynyl group is ethynyl.
As used herein, aryl means an aromatic monocyclic or multicyclic hydrocarbon ring system containing from 3 to 15 or 16 carbon atoms, preferably from 5 to 10. Aryl groups include, but are not limited to groups, such as phenyl, substituted phenyl, napthyl, substituted naphthyl, in which the substitunent is loweralkyl, halogen, or lower alkoxy. Preferred aryl groups are lower aryl groups that contain less than 7 carbons in the ring 20~ structure.
As used herein, the nomenclature alkyl, alkoxy, carbonyl, etc. are used as is generally understood by those of skill in this art.
As used herein, cycloalkyl refers to saturated cyclic carbon chains;
cycloalkyenyl and cycloalkynyl refer to cyclic carbon chains that include at 25~ least one unsaturated double or triple band, respectively. The cyclic portions of the carbon chains may include one ring or two or more fused rings.
As used herein, cycloalkenyl means a non-aromatic monocyclic or multicyclic ring system containing a carbon-carbon double bond and having 77718-35(S) about 3 to about 10 carbon atoms. Exemplary monocyclic cycloalkenyl rings include cyclopentenyl or cyclohexenyl; preferred is cyclohexenyl. An _ exemplary multicyclic cycloalkenyl ring is norbornylenyl. The cycloalkenyl group may be independently substituted by one or more halo or alkyl.
As used herein, "haloalkyl" refers to a loweralkyl radical in which one or more of the hydrogen atoms are replaced by halogen including, but not limited to, chloromethyl, trifluoromethyl, 1-chlora-2-fluoroethyl and the like.
As used herein, "haloalkoxy" refers to RO- in which R is a haloalkyl group.
As used herein, "carboxamide" refers to groups of formula -RPCONHz in which R is selected from alkyl or aryl, preferably loweralkyl or lower aryl and p is 0 or 1.
As used herein, "alkylaminocarbonyl" refers to -C(O)NHR in which R is hydrogen, alkyl, preferably loweralkyl or aryl, preferably lower aryl.
As used herein "dialkylaminocarbonyl" as used herein refers to -C(O)NR~R in which R- and R are independently selected from alkyl or aryl, preferably loweralkyi or loweraryl .
As used herein, "alkoxycarbonyl" as used herein refers to -C(OtOR in which R is alkyl, preferably loweralkyl or aryl, preferably lower aryl.
As used herein, "alkoxy" and "thioalkoxy" refer to RO- and RS-, in which R is alkyl, preferably loweralkyl or aryl, preferably lower aryl.
As used herein, "haloalkoxy" refers to RO- in which R is a haloalkyl group.
As used herein, "aminocarbonyl" refers to -C(O)NHz.
As used herein, "alkylaminocarbonyl" refers to -C(01NHR in which R is alkyl, preferably loweralkyi or aryl, preferably lower aryl.

77718-35(S) As used herein, alkylenedioxy means an -O-alkyl-O- group in which the alkyl group is as previously described. A replacement analog of alkylenedioxy means an alkylenedioxy in which one or both of the oxygen atoms is replaced by a similar behaving atom or group of atoms such as, S, N, NH, Se. An exemplary replacement alkylenedioxy group is ethylenebis(sulfandiyl).
Alkylenethioxyoxy is -S-alkyl-O- , -O-alkyl-S-- and alkylenedithioxy is -S-alkyl-S-.
As used herein, heteroaryl means an aromatic monocyclic or fused ring system in which one or more of the carbon atoms in the ring system is(are) replaced by an elements) other than carbon, for example nitrogen, oxygen or sulfur. Preferred cyclic groups contain one or two fused rings and include from about 3 to about 7 members in each ring. Similar to "aryl groups", the heteroaryl groups may be unsubstituted or substituted by one or more substituents. Exemplary heteroaryl groups include pyrazinyl, pyrazolyl, tetrazolyl; furanyl, (2- or 3-)thienyl, 12-,3- or 4-)pyridyl, imidazoyl, pyrimidinyl, isoxazolyl, thiazolyl, isothiazolyl, quinolinyl, indolyl, isoquinolinyl, oxazolyl and 1,2,4-oxadiazolyl. Preferred heteroaryl groups include 5 to 6-rnembered nitrogen-containing rings, such as pyrmidinyl.
As used herein, alkoxycarbonyl means an alkyl-O-CO- group.
2 o Exemplary alkoxycarbonyl groups include methoxy- and ethoxycarbonyl.
As used herein, carbamoyl means -CONH2. As with all groups described herein, these groups may be unsubstituted or substituted.
Substituted carbamoyl includes groups such as -CONYzY3 in which YZ and Y' are independently hydrogen, alkyl, cyano(loweralkyl), aryalkyl, heteroaralkyl, carboxy(loweralkyl), carboxy(aryl substituted loweralkyl), carboxy(carboxy substituted loweralkyl), carboxy(hydroxy substituted loweralkyl), carboxy(heteroaryl substituted loweraikyl), carbamoyl(loweralkyl), alkoxycarbonyllloweralkyl) or alkoxycarbonyl(aryl substituted loweralkyl), provided that only one of YZ and Y3 may be hydrogen and when one of YZ and Y3 is carboxy(foweralkyl), carboxy(aryl substituted loweralkyl), carbamoyl(loweralkyl), alkoxycarbonyl(loweralkyl) or alkoxycarbonyl(aryl substituted loweralkyl) then the other of Y2 and Y3 is hydrogen or alkyl.
Preferred for YZ and Y3 are independently hydrogen, alkyl, cyano(loweralkyl), aryalkyl, heteroaralkyl, carboxy(loweralkyl), carboxylaryl substituted loweralkyl) and carbamoyl(loweralkyl).
As used herein, any corresponding N-(4-halo-3-methyl-5-isoxazolyl), N-(4-halo-5-methyl-3-isoxazolyl), N-(3,4-dimethyl-5-isoxazolyl), N-(4-halo-5-methyl-3-isoxazolyl), N-(4-halo-3-methyl-5-isoxazolyl), N-(4,5-dimethyl-3-isoxazolyl) derivative thereof refers to compounds in which Ar2 is the same as the compound specifcally set forth, but Ar' is N-14-halo-3-methyl-5-isox-azolyl), N-(4-halo-5-methyl-3-isoxazolyl), N-(3,4-dimethyl-5-isoxazolyl), N-(4-halo-5-methyl-3-isoxazolyl), N-(4-halo-3-methyl-5-isoxazolyll, or N-(4,5-dimethyl-3-isoxazolyl) in which halo is any halide, peferably CI or Br.
As used herein, the abbreviations for any protective groups, amino acids and other compounds, are, unless indicated otherwise, in accord with their common usage, recognized abbreviations, or the IUPAC-IUB Commission on Biochemical Nomenclature (see, (1972) Biochem. 11:942-944).
A. Compounds for use in treating endothelin-mediated diseases Compounds and methods for treating endothelin-mediated diseases using the compounds of formula I are provided. In particular, the compounds provided herein are aryl-substituted thienyl, furanyl, or pyrrolyl sulfonamides, where the aryl group is tetra-, penta- or hexasubstituted, preferably pentasubstituted. Particularly preferred sulfonamides are N-isoxazolyl thio-phene sulfonamides wherein the thiophene is substituted with an aryl group which has only one or two hydrogen substituents. If the aryl group is tetrasubstituted, it will preferably be substituted at the 2, 4 and 6 positions and one of these substituents wilt be a polar group, such as hydroxyl, carboxyl and carboxamide. If the aryl group is substituted at the 2, 4 and 6 positions with nonpolar groups, such as alkyl groups, more specifically methyl groups, then the aryl group will preferably be yenta- or hexasubstituted. In T ____....__ _ .__.._._..~._ _._. _.__.~__.__ pentasubstituted aryl groups, the fifth substituent will be at the 3 position and will preferrably be a polar group, such as hydroxyl, carboxyl and carboxamide.
The compounds described herein in this latter group good bioavailability, relatively long in vivo half-life, and good efficacy in in vivo animal models and other suitable models.
The sulfonamides have formula I:
A r' .

R
i ..
X ~~ w \ _ R (I) O R 5~- ~: ~.- , 3 or the corresponding thiophene-2-sulfonamides as defined above, where Ar' is a substituted or unsubstituted monocyclic or polycyclic, preferably a monocyclic or fused bicyclic, aryl group with one or more substituents, selected from, for example, H, NH2, halide, pseudohalide, alkyl, alkylcarbonyl, formyl, an aromatic or heteroaromatic group, alkoxyalkyl, alkylamino, alkylthio, arylcarbonyl, aryloxy, arylamino, arylthio, haloalkyl, haloaryl, carbonyl, in which the aryl and alkyl portions, are unsubstituted or substituted with any of the preceeding groups, and straight or branched chains of from about 1 up to about 10-12 carbons, preferably, 1 to about 5 or 6 carbons.
The substituents are preferably H, NHZ, halide, CH3, CH30 or another aromatic group. In particular, Ar' is a five or six membered substituted or unsubstituted aromatic or heteroaromatic ring or a fused bicyclic substituted or unsubstituted aromatic or heteroaromatic ring, preferably 3- or 5-isoxazolyl, benzo-1,2,7-thiadiazol-4-yl, 2-pyrazinyl or benzo-1,2,7-oxadiazol-4-yl;
X is S, O or NR", preferably S;

R'-R5 are as defined above, and R6 is H, or substituted or unsubstituted alkyl or aryl, preferably H or substituted or unsubstituted lower alkyl, more preferably H, methyl or carboxymethyl.
In all embodiments herein, Ar' is preferably an isoxazolyl of formula:
RR
t or .,o ,N ~ ~0 N
in which RA and RB are either (i), (iii or (iii) as follows:
(i) R'' and RB are each independently selected from H, NH2, NO2, halide, pseudohalide, alkyl, alkenyl, alkynyl, aryl, arylalkyl, heteroaryl, alkoxy, alkylamino, alkylthio, alkyloxy, haloalkyi, alkyisufinyl, alkylsulfonyl, aryloxy, arylamino, arylthio, arylsufinyl, arylsulfonyl, haloalkyl, haloaryl, alkoxycarbonyl, alkylcarbonyl, aminocarbonyl, arylcarbonyl, formyl, substituted or unsubstituted amido, substituted or unsubstituted ureido, in which the alkyl, alkenyl and alkynyl portions contain from 1 up to about 14 carbon atoms and are either straight or branched chains or cyclic, and the aryl portions contain from about 4 to about 16 carbons, except that RZ is not halide or pseudohalide; or, (ii) RA and RB together form -(CHz)~, where n is 3 to 6; or, (iii) R'' and RB together form 1,3-butadienyl.
In preferred embodiments herein, RA and RB are each selected independently from among alkyl, lower alkenyl, lower alkynyl, lower haloalkyl, halide, pseudohalide or H, except that RB is not halide.

in one embodiment, the sulfonamides have formula II:
__r___..__._ _.... _ .. _ __ _. . ____ _..... _. _ _ _ . . _. .

A r' ,, SO;, NH
' ;~ R
cr,;, 1~, ... W ~..
'S
( (ll) O ~-R ,.o _ R

or the corresponding thiophene-2-sulfonamides as defined above.
Ar' is a substituted or unsubstituted monocyclic or polycyclic, preferably a monocyclic or fused bicyclic, aryl group with one or more substituents, selected from, for example, H, NH2, halide, pseudohalide, alkyl, alkylcarbonyl, formyl, an aromatic or heteroaromatic group, alkoxyalkyl, alkylamino, alkylthio, arylcarbonyl, aryloxy, arylamino, arylthio, haloalkyl, haloaryl, carbonyl, in which the aryl and alkyl portions are unsubstituted or substituted with any of the preceeding groups, and straight or branched chains of from about 1 up to about 10-12 carbons, preferably, 1 to about 5 or 6 carbons. The substituents are preferably H, NH2, halide, CH3, CH30 or another aromatic group. In particular, Ar2 is a five or six membered substituted or unsubstituted aromatic or heteroaromatic ring or a fused bicyclic substituted or unsubstituted aromatic or heteroaromatic ring, preferably 3- or 5-isoxazolyl, benzo-1,2,7-thiadiazol-4-yl, 2-pyrazinyl or benzo-1,2,7-oxadiazol-4-yl, more preferably 4-chloro-3-methyl-5-isoxazolyl or 4-chloro-5-methyl-3-isoxazolyl; W is -NH-, =NCOR'6, =NCOzR'6, NHC(R'2)(R'6)- or is -CHZ- when R9 is hydroxyl.
R9 is selected from the group consisting of substituted and unsubstituted alkyl, hydroxyl, substituted and unsubstituted alkoxy, OC(0)R'6, OCOzR'6, NR'ZR'6 and S(0)"R'6 in which n is 0-2; preferably alkoxycarbonylalkyl, carboxyalkyl, dialkylaminoalkyl, alkylsulfonylamino and aminosulfonyl.

The phenyl substituents designated in this formula R', R8 and R'°
are R', R3, and R5, respectively. R', RB and R'°, which are preferably alkyl, haloalkyl, polyhaloalkyl, alkenyl containing 1 to 2 double bonds, alkynyl containing 1 to 2 triple bonds, cycloalkyl, cycloaikylalkyl, aryl, heteroaryl, arylalkyl, or heteroarylalkyl, more preferably lower alkyl, lower alkenyl, lower alkynyl, or aryl, most preferably methyl.
In more preferred embodiments, the sulfonamides of formula II are those wherein R', R8, R9 and R'° do not, contain cyano groups and W is not -CHZ-. These compounds are preferred due to their improved toxicological profiles relative to other compounds of formula II.
In preferred embodiments of the compounds of formula II, Ar' is 3- or 5-isoxazolyl, benzo-1,2,7-thiadiazol-4-yl, 2-pyrazinyl or benzo-1,2,7-oxadiazol-4-yl, more preferably 3-methoxy-2-pyrazinyl, 3,4-dimethyl-5-isoxazolyl, 4-chloro-3-methyl-5-isoxazolyl or 4-chloro-5-methyl-3-isoxazolyl; W is -NH-, =NCOZR'6, or is -CH2- when R9 is hydroxyl; R', R$ and R'° are methyl;
and R~
is selected from the group consisting of substituted and unsubstituted alkyl, hydroxyl, substituted and unsubstituted alkoxy, OC(O)R'6, OC02R'6, NR'zR'6 and S(O)~R'6 in which n is 0-2; preferably alkoxycarbonylalkyl, carboxyalkyl, dialkylaminoalkyl, alkylsulfonylamino and aminosulfonyl.
ZO R9 is, in certain of these embodiments, methoxy, methoxycarbonyl-methoxy, 2-(2-methoxyethoxy)ethoxyacetoxy, 2-hydroxyethoxy, N,N-dimethylthiocarbonyloxy, N,N-dimethylthiocarbonyloxymethyl, dimethylamino, pyrrolidinyl, acetoxy, hydroxyl, carboxyl, cyanomethyl, acetoxymethyl, hydroxymethyl, carboxylmethyl, methanesulfonylamino, N,N-dimethylaminomethyl, SOZNHz, or methoxycarbonylmethyl.
R9, in more preferred embodiments, does not contain a cyano group and is, for example, methoxy, methoxycarbonylmethoxy, 2-(2-methoxy-ethoxy)ethoxyacetoxy, 2-hydroxyethoxy, N,N-dimethylthiocarbonyloxy, N,N-dimethylthiocarbonyloxymethyl, dimethylamino, pyrrolidinyl, acetoxymethyl, methoxycarbonylmethyl, hydroxy or acetoxy.
T
_. .___.__ _ _____.-__._.. ___ _ __ __ Among the compounds of formula II are:
N-(4-chloro-3-methyl-5-isoxazolyl)-2-( 3-carboxylmethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-acetoxy-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-pyrrolidinyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-dimethylamino-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-f4-chloro-3-methyl-5-isoxazolyll-2-(3-(N,N-dimethylthiocarbonyloxymethyl-2,4, 6-trimethylphenylaminocarbonyl~thio-phene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-(N,N-dimethylthiocarbonyloxy)-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-(2-hydroxyethoxy) 2,4,6-trimethylphenylaminocarbonyllthiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-(2-(2-methoxyethoxylethoxylacetoxy-2,4,6-trimethylphenylaminocarbonyl)thio-phene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methoxycarbonylmethoxy-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methoxy-2,4,6-trimethylphenyl-aminocarbonyllthiophene-3-sulfonamide;
N-(4-chioro-3-methyl-5-isoxazolyl)-2-(3-methoxycarbonylmethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-13-acetoxymethyl-2,4,6-trimethylphenylaminocarbonyllthiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-hydroxy-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-dimethylaminomethyl 2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;

N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methanesulfonylamino-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-sulfamoyl 2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazolyl)-2-f3-methoxycarbonylmethyl-2,4,6-trimethyiphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-carboxylmethyl-2,4,6-trimethylphenylaminocarbonyllthiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazolyll-2-(3-acetoxymethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-hydroxymethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazoiyl)-2-(3-dimethylaminomethyl 2,4,6-trimethyiphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-methanesulfonylamino-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-hydroxy-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-carboxy-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-cyano-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-5-methyl-3-isoxazolyll-2-(3-sulfamoyl-2,4,6-trimethylphenyfaminocarbonyl)thiophene-3-sulfonamide;
N-(3,4-dimethyl-5-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(3,4-dimethyl-5-isoxazolyl)-2-(3-methoxycarbonylmethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;

N- ( 3, 4-dimethyl-5-isoxazolyl)-2-(3-carboxylmethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(3,4-dimethyl-5-isoxazolyl)-2-(3-acetoxymethyl-2, 4, 6-trimethylphenylam inocarbonyl)thiophene-3-sulfonamide;
N-(3,4-dimethyl-5-isoxazolyl)-2-(3-hydroxymethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(3,4-dimethyl-5-isoxazolyl)-2-(3-dimethylaminomethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-( 3,4-dirnethyl-5-isoxazolyl)-2-(3-methanesulfonylamino-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(3,4-dimethyl-5-isoxazolyl)-2-(3-hydroxy-2,4,6-trimethylphenylamino-carbonyl)thiophene-3-sulfonamide;
N-(3,4-dimethyl-5-isoxazolyl)-2-(3-carboxy-2,4,6-trimethylphenylamino-carbonyl)thiophene-3-sulfonamide;
N-(3,4-dimethyl-5-isoxazolyl)-2-(3-cyano-2,4,6-trimethylphenylamino-carbonyl)thiophene-3-sulfonamide;
N-(3,4-dimethyl-5-isoxazolyl)-2-(3-sulfamoyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-( benzo-1, 2, 7-thiadiazol-4-yl)-2-(3-cyanomethyl-2,4, 6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(benzo-1,2,7-thiadiazol-4-yl)-2-(3-methoxycarbonylmethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(benzo-1,2,7-thiadiazol-4-yl)-2-f3-carboxylmethyl-2,4,6-trimethylphenylaminocarbonyl~thiophene-3-sulfonamide;
N-(benzo-1,2,7-thiadiazol-4-yi)-2-(3-acetoxymethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(benzo-1,2, 7-thiadiazol-4-yl)-2-(3-hydroxymethyl-2,4,6-trimethylphenylarninocarbonyl)thiophene-3-sulfonamide;
N-(benzo-1,2,7-thiadiazol-4-yl)-2-(3-dimethylaminomethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;

N-(benzo-1,2,7-thiadiazol-4-yl)-2-(3-methanesulfonylamino-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(benzo-1,2,7-thiadiazol-4-yl)-2-(3-hydroxy-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(benzo-1,2,7-thiadiazol-4-yl)-2-(3-carboxy-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(benzo-1,2,7-thiadiazol-4-yl)-2-(3-cyano-2,4,6-trimethylphenylamino-carbonyl)thiophene-3-sulfonamide;
N-(benzo-1,2,7-thiadiazol-4-yl)-2-(3-sulfamoyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-(3-cyanomethyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-(3-methoxycarbonylmethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-(3-carboxylmethyl-2,4,6-trimethylphenyl-am inocarbonyl~thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-(3-acetoxymethyl-2,4, 6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-(3-hydroxymethyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-(3-dimethylaminomethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-( 3-methanesulfonylamino-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-(3-hydroxy-2,4,6-trimethylphenylaminocar-bonyl)thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-(3-carboxy-2,4,6-trimethylphenylaminocar-bonyl)thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-(3-cyano-2,4,6-trimethylphenylaminocar-bonyl)thiophene-3-sulfonamide;

N-f3-methoxy-2-pyrazinyl)-2-(3-sulfamoyl-2,4,6-trimethyiphenylamino-carbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-( 1-methyl-1-phenyl-1-ethylarnino-carbonyl)thiophene-3-sulfonamide;
N-14-chloro-3-methyl-5-isoxazolyl)-2-((R)-1-phenyl-1-ethylaminocar-bonyl)thiophene-3-sulfonamide; and N-(4-chloro-3-methyl-5-isoxazolyl)-2-(IS)-1-phenyl-1-ethylaminocar-bonyl)thiophene-3-sulfonamide.
Among the more preferred compounds of formula II are:
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methoxycarbonylmethyl-2,4,6-trimethylphenyiaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-acetoxymethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-hydroxy-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methoxy-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chioro-3-methyl-5-isoxazolyl)-2-( 3-rnethoxycarbonylmethoxy-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-(2-12-methoxyethoxy~ethoxy)acetoxy-2,4,6-trimethylphenylaminocarbonyl)thio-phene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-( 2-hydroxyethoxy)-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chioro-3-methyl-5-isoxazolyl)-2-(3-(N,N-dimethylthiocarbonyloxy)-2,4, 6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-( 3-( N, N-dimethylthiocarbonyloxymethyl-2,4,6-trimethylphenylaminocarbonyl)thio-phene-3-sulfonamide;
N-(4-chioro-3-methyl-5-isoxazolyl)-2-(3-dimethylamino-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;

N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-pyrrolidinyl-2,4,6-trimethyiphenylaminocarbonyllthiophene-3-sulfonamide; and N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-acetoxy-2,4,6-trimethylphenyl-aminocarbonyl~thiophene-3-sulfonamide.
In another embodiment, the sulfonamides have formula III:
A r' A r' C' G
. W ~., R , X ~j(~ W I ~ R
I
O ~ ~~i~ , O
G G G ~~ O
or i O
Ar / ( 1111 sot NH
G
W \ G
I
O
O R
or the corresponding thiophene-2-sulfonamides as defined above, where:
Ar' is a substituted or unsubstituted monocyclic or polycyclic, preferably a monocyclic or fused bicyclic, aryl group with one or more substituents, selected from, for example, H, NHz, halide, pseudohalide, alkyl, alkylcarbonyl, formyl, an aromatic or heteroaromatic group, alkoxyalkyl, alkylamino, alkylthio, arylcarbonyl, aryloxy, arylamino, arylthio, haloalkyl, haloaryl, carbonyl, in which the aryl and alkyl portions, are unsubstituted or substituted with any of the preceeding groups, and straight or branched chains of from about 1 up to about 10-12 carbons, preferably, 1 to about 5 or 6 carbons. The substituents are preferably H, NH2, halide, CH3, CH30 or another aromatic group. In particular, Ar' is a five or six membered substituted or unsubstituted aromatic or heteroaromatic ring or a fused bicyclic substituted or unsubstituted aromatic or heteroaromatic ring, preferably 3- or 5-isoxazolyl, benzo-1,2,7-thiadiazol-4-yl, 2-pyrazinyl or benzo-1, 2, 7-oxadiazol-4-yl;

X is S, O or NR";
each G and R, which are selected from among the R'-R5 as defined above, are preferably independently selected from lower alkyl, CN, -(CHZ)xC(O)fCH~)x, -(CHZ)x, (CHz)xN-lower alkyl, -(CHZ)XC(O)NH2, a D-, L-or racemic amino acid, a primary or secondary amide, O-glycoside, a hexose or ribose, -S(O)zNH2, hydroxy, alkoxy, alkoxycarbonyl, acetoxyalkyl, -(CHZ)xC00H; -(CHZ)xCOOH-, COZ-lower alkyl, CN, heteroaryl, -COC(O)(CHz)xCH3, -(CHZ)XN(CH3)2, a sulfonyl chloride, S(O)2NHR5o, alkylaryl, alkylheteroaryl, C(O)NHRS°, -(CHZ)xOH, -C(O)N(H1N(H)M';
R5° is hydrogen, lower alkyl, lower alkoxy;
M' is H or RSO;
R' is selected from hydrogen, G and R;
W is =C(halo)2, =N(H), -(CH2)X-, =N(lower alkyl), -C(O)-, =C(lower alkyll?, and x is 0-3.
In particular, in these embodiments compounds where: R, G and R' are selected where the amino acid is L-Asp or L-Glu; the hexose is D-mannose, the heteroaryl is triazolyl, and X is S are of interest. Also of interest are compounds in which:
W is = CH2, = NH, = NCH3, = NCHzCH3, = C(CH3)z or CFZ; and G is -CH3, -CN, -COCH3, -CHZCH3, -(CHz)XCOzH are of interest.
Among these compounds are:
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methoxycarbonyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide;
Nz-f3-cyanomethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxa-zolylsulfamoyll-2-thiophenecarboxamide;
methyl-2-(3-(3-(4-chloro-3-methyl-5-isoxazolylsulfa-moyl)-2-thienylcarboxamido)-2,4,6-trimethylphenyl)acetate;
2-(3-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienyl-carboxamido)-2,4,6-trimethylphenyl)acetic acid;

N2-(3-acetyloxymethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
NZ-(3-hydroxymethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
Nz-(3-dimethylaminomethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide trifluoroacetate;
NZ-l3-(4,5-dihydro-1,3-oxazol-2-yll-2,4,6-trimethylphenyl)-3 (4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
3-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienyl-carboxamidol-2,4,6-trimethylbenzoic acid;
N-(3-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarbox-amido)-2,4,6-trimethylbenzoyl]glutamic acid;
N-[3-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarbox-amido)-2,4,6-trimethylbenzoyl]aspartic acid;
N-[2-(3-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarbox-amido)-2,4,6-trimethylphenyl)acetyl]glutamic acid;
N-[2-(3-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarbox-amido)-2,4,6-trimethylphenyl)acetyl]aspartic acid;
NZ-(3-cyano-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolyl-sulfamoyl)-2-thiophenecarboxamide;
2-(3-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcar-boxamido)-2,4,6-trimethylphenoxy)acetic acid;
N2-(3-alkylsulfonamido-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
NZ-(3-arylsulfonamido-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
Nz-(3-sulfamoyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
Nz-(3-alkylsulfamoyl-2,4,6-trimethylpheny!)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
NZ-( 3-a rylsulfamoyl-2,4, 6-trimethylphenyl)-3-(4-chloro-3-methyl-5-_ _.__.__.~

isoxazolylsulfamoyl)-2-thiophenecarboxamide;
N2-(3-(1 H-1,2,3,4-tetraazol-5-ylmethyl)-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
Nz-(3-(2-pyridylmethyl)-2,4,6-trimethyiphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
Nz-( 3-hydrazinocarbonyl-2,4, 6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
NZ-(3-aminomethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
NZ-(3-(a-D-mannopyranosyloxymethyl)-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide;
5-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarboxamido)-4-cyano-6-methylbenzo[d) [ 1, 3]dioxole;
5-(3-f4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarboxamido)-6-cyano-4-methylbenzo[d)[1 ,3)dioxole;
2-(5-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarbox-amido)-4-methylbenzo[d)[1 ,3)dioxole)-6-acetic acid;
5-(3-l4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcar-boxamido)-4-acetyl-6-methylbenzo[d)[ 1,3)dioxole;
5-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarboxamido)-6-acetyl-4-methylbenzo[d)[ 1 ,3]dioxole;
5-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarbox-amido)-7-cyano-4, 6-dimethylbenzo[d) [ 1, 3)dioxole;
6-(3-(4-chloro-3-methyl-5-isoxazoiylsulfamoyl)-2-thienylcarbox-amido)-5,7-dimethylbenzo[d][ 1,3)dioxole-4-carboxylic acid;

7-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarbox-amido)-5,6-dimethylbenzo[d)[1,3)dioxole-4-carboxylic acid;
7-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarboxamidol-4-cyano-5,6-dimethylbenzo[d)C1,3)dioxole;
7-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarbox-amido)-4-acetyl-5,6-dimethylbenzo[d)[1,3)dioxole;

7-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarboxamido)-4-carboxamido-5,6-dimethylbenzo[d)[1,3)dioxole;
7-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcar-boxamido)-4-aminomethyl-5,6-dimethylbenzo[d)[1,3)dioxole; and 7-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarbox-amido)-4-dimethylaminomethyl-5,6-dimethylbenzo[d)[1,3)dioxole;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-carboxymethyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-f 3-acetoxymethyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide; N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-hydroxymethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfona-mide; and N-(4-chloro-3-methyl-5-isoxazoly!)-2-(3-methoxycarbonyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide.
In another embodiment, the sulfonamides have formula IV:
A r' SO-~ NH
' n r-- R M a ,,, ,11,.
s i __.~1,. w O /
O
(IV) or the corresponding thiophene-2-sulfonamides as defined above, Ar' is defined as above, except when R6 is H, then Ar' is not 4-chloro-3-methyl-5-isoxazolyl, 4-chloro-5-methyl-3-isoxazolyl or 3,4-dimethyl-5-isoxazoly. Ar' is preferably benzo-1 ,2,7-oxadiazol-4-yl or 2-methoxy-3-pyrazinyl when R6 is H; and R6 is H, or substituted or unsubstituted alkyl or __._..~__.__.._~__. _._.__._ ___..____._~..____ _ .._ _. _.__.__..__, _..

aryl, preferably H or substituted or unsubstituted lower alkyl, more preferably methyl or carboxymethyl.
In other embodiments of formula (IV), Ar' is preferably benzo-1,2,7-oxadiazol-4-yl or 2-methoxy-3-pyrazinyl when R6 is H and R6 is H, or substituted or unsubstituted alkyl or aryl, preferably H or substituted or unsubstituted lower alkyl, mere preferably methyl or carboxymethyl.
Thus, preferred compounds of formula IV include:
N-(benzo-1,2,7-oxadizaol-4-yl)-2-(2-methyl-4,5-methylenedioxyphenylacetyl)thiophene-3-sulfonamide;
N-(3-methoxy-2-pyrazinyl)-2-(2-methyl-4,5-methylenedioxyphenylacetyllthiophene-3-sulfonamide;
N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-(2-methyl-4,5-methylenedioxyphenyl)propanoyl)thiophene-3-sulfonamide; and N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-carboxyl-2-(2-methyl-4,5-methylenedioxyphenyl)propanoyl)thiophene-3-sulfonamide.
In another embodiment, the sulfonamides have formula V:
Ar1 ~ S O? N H

W
~ c~ ~ ' ~..%
(V) O
Me '' ~Me or the corresponding thiophene-2-sulfonamides as defined above.
Ar' is defined as above and is preferably 4-chloro-3-methyl-5-isoxazolyl; W is NH; and RZ° is selected from the group consisting of aryl, heteroaryl, heterocycie, OH, CN, C(O)R'6, C02R'6, SH, S(O)~R's in which n is 0-2, a D, L or racemic amino acid, a ribose or hexose, an O-glycoside, a suffonyl chloride, -(CHZ)xOH, NHOH, NR'ZR'6, NOz, N3, OR'6, R'ZNCOR'6 and CONR'ZR'6; R'6 is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl or cycloalkynyl; R'2 is selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl, cycloalkynyl, C(O)R" and S(O)~R"
in which n is 0-2; R" is hydrogen, alkyl, alkenyl, alkynyl, aryl, alkylaryl, heterocycle, aralkyl, aralkoxy, cycloalkyl, cycloalkenyl or cyc[oalkynyl; each of R'z, R'S and R'6 may be further substituted with the any of the groups set forth for Z; RZ° is preferably CONHz, COOH, or phenyl.
Preferred embodiments of the compounds of formula V are those wherein Ar' is 4-chloro-3-methyl-5-isoxazolyl; W is NH; and RZ° is CONH2, COOH, or phenyl.
Also of interest are any pharmaceutically-acceptable derivatives, including salts, esters, acids and bases, solvates, hydrates and prodrugs of the sulfonamides. Preferred are pharmaceutically-acceptable salts, particularly alkali metal salts, most preferably sodium salts.
Particularly preferred derivatives are salts of compounds described herein where W is alkylene, more particularly CHz. Of these derivatives, the preferred salts are sodium salts, preferably sodium hydrogen phosphate or sodium salts, more preferably sodium salts.
In all embodiments, preferred substituents also can be determined by reference to Table 1, which sets forth exemplary compounds.
Preferred compounds are those of Table 1 that have the highest activities, and preferred substituents are those on the compounds with the highest activities (activity at the lowest concentration).

COMPOUND ETA (,uMl~ ETB (,vM)~

N-(3,4-dimethyl-5-isoxazolyl)-2-methyfbenzo[b]thio-0.167 16.6 phene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyll-2-14-0.048r 1.1' ethylbenzyllbenzo[blthiophene-3-sulfonamide __..-.-._..~.___.. ___ __.... _..
T

COMPOUND ETA (~uM)' ETB (ErM)' N-(4-bromo-3-methyl-5-isoxazolyl)-2-[3,4-o.ooiso.ooia0.3240.78 Imethylenedioxy)benzyl]benzo[b]thiophene-3-sulfon-0.00~4~o.ooii'0.93910.262' amide N-(4-bromo-3-methyl-5-isoxazolyl?-2-(3,4,5-0.013' 1.2' trimethoxybenzyl)-benzo(b]thiophene-3-sulfonamide N-;4-chloro-3-methyl-5-isoxazolyll-2-[(3,4-methy-o.o> > 0.005'0.93610.095' lenedioxylbenzyl]benzo(b]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-(3,4-dimethoxy-O.o2~ 0.0~ 2.94 1.321 7' benzyl)benzo[b]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-5-(benzo(b]thien-16' 0.80' 2-yl)thiophene-2- sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-14-0.051' 1.5' methoxybenzyl)benzo(b]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxozolyl)-2-(2-0.19' 2.2' methoxybenzyl)-benzo(b]thiophene-3-sulfonamide N-(3,4-dimethyl-5-isoxazolyl)-2-(4- 0.21' 4.7' chiorobenzyl)benzo[b]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(4-0.041' 1.3' dimethylaminobenzyl)benzo[b]thiophene-3-sulfona-0.014 0.477 mide N-14-chloro-3-methyl-5-isoxazolyl)-2-0.15 ' 22' ethylbenzo[b]furan-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-phenylben-0.932' 46.8' zo[b]thiophene sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-6-methoxy-2--2es" 2,39r (3,4-Imethylenedioxy)benzyl]benzo(b]thiophene-3-sulfonamide N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3,4-(methylene-0.0055' 0.364' dioxylbenzyl]benzo[b]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-0.631 53,2 methoxycarbonylthiophene-3-sulfonamide N-(3,4-dimethyl-5-isoxazolyl)1-3-(phenylaminocar-0.163 > 100 bonyl)thiophene-2-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[(4-toiyllamino-0.00116 2.93 carbonyl]thiophene-3-sulfonamide 0.0105' 14f N-(3,4-dimethyl-5-isoxazolyl)-2-[(4-methylphenyll-0.00336 11.3 aminocarbonyl]thiophene-3-sulfonamide COMPOUND ETA (,uM)~ETB (IuM)-N-(4-bromo-3-methyl-5-isoxazolyl)-2-)(methyl)phenyl-0.188 16.0 aminocarbonyl]thiophene-3-sulfonamide N-14-bromo-3-methyl-5-isoxazolyl)-2-(a-0.337 9.37 hydroxybenzyl)thiophene-3-sulfonamide N-(4-bromo-5-methyl-3-isoxazoiyl)-5-(4-7.10 0.3593 methylphenyl)thiophene-2-sulfonamide 15.8r 0.251 N-(4-bromo-3-methyl-5-isoxazolyl)-2- 0.160 44.1 (hydroxymethyl)thiophene-3-sulfonamide1.55' --N-(4-bromo-3-methyl-5-isoxazolyl)-5-(2-3.46 0.529 formylphenyl)thiophene-3-sulfonamide 12.31' 1.280.71' N-(3,4-dimethyl-5-isoxazolyl))-2-[(3-0.214 5.34 methoxyanilino)methyl]thiophene-3-sulfonamide0.933' 7.7' N-(4-bromo-3-methyl-5-isoxazolyl?-2-[(3-0.062' > 100' carboxyphenyl)aminocarbonyl]thiophene-3-sulfona-mide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[2-0.21' 20' carboxylphenyl)aminocarbonyl]-thiophene-3-sulfona-mide N-(4-bromo-3-methyl-5-isoxazolyl)-2-(aminocar-0.841 > 100' bonyl)thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(5-dimethylamino-1-naphthyl)sulfonylaminocar-O.g71 3.g, bony)]thiophene-3-sulfonamide N-14-bromo-3-methyl-5-isoxazolyl)-5-(5-methyl-2-17' 0.21' thienyllthiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(3,4-0.017' g.8' methylenedioxyphenyl)aminocarbonyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyll-2-[(3,4-0.0073' 6.0' methylenedioxy)phenoxycarbonyl]thiophene-3-sulfon-amide N-(4-bromo-3-methyl-5-isoxazolyl)-3-[(3,4-0.50' 79' methylenedioxy)phenyllthiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-[13,4-8.1' 3.2' methylenedioxy)benzyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-benzylthio-1.6' 3g' phene-2-sulfonamide __ . T _.______. _ __ __.._ ..__-_..-. _____ _ . __ ..

COMPOUND ETA (~uM)' ETg (pM)' N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(3,4-0.27' 7.7' methylenedioxy)benzyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(3,4-2.0' 15' methylenedioxy)benzoyl)thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[12-0.013' 38' hydroxyphenyllaminocarbonyl)thiophene-3-sulfona-mide N-(3,4-dimethyl-5-isoxazolyl)-2-13,4-6.1' > ~ 50 (methylenedioxy)phenoxycarbonyl]thiophene-3-sul-fonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(3,4-0.089' 37' methylenedioxylbenzoyl]aminocarbonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyll-2-13,4-0.0065' 7.4' (methylenedioxy)phenoxycarbonyi]thiophene-3-sul-fonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-](3,4-0.0091' 5.5' methylenedioxy)phenylacetyl]thiophene-3-sulfona-mide N-(4-bromo-3-methyl-5-isoxazolyll-2-[3,4-0.087' S.g' (methylenedioxy)phenoxycarbonylamino]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazoiyl)-2-[(2-chloro-3,4-13' 0.76' methylenedioxylphenoxymethyl]thiophene-3-sulfona-mide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[traps-(3,4-0.14' 1.4' methylenedioxy)cinnamyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl 0.571 1.3' )-2-[ ( 3,4-methylenedioxy)phenylureido]thiophene-3-sulfona-mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[(3,4-0.021' 6.5' (methylenedioxy)phenylacetyl]thiophene-3-sulfona-mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-13,4-0.42' 12' (methylenedioxy)benzyloxycarbonyl]thiophene-3-sul-fonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[2-(3,4-0.23' 6.2' methylenedioxyphenyl)]ethoxycarbonyl-3-sulfona-mide COMPOUND ETA (pM)' ETB (~uM)' N-(4-chloro-3-methyl-5-isoxazolyl)-2-{[4-(3,4-20' > -100' methylenedioxybenzyl)piperazin-1-yl]carbonyl}thio-phene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-aminothio-14' 6.2' phene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-{1-cyano-1-2.1' 27' [13,4-methylenedioxy)phenyl]acetyl}thiophene-3-sul-fonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(3,4-0.21' 9.2' methylenedioxy)phenethyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazoly!)-2-[(3-1 .4' 60' dimethylamino)phenoxycarbonyl]thiophene-3-sulfon-amide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[/3-hydroxy(3,4-0.053' 16' methylenedioxy)phenylethyl]thiophene-3-sulfona-mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[(4-1 ,37 oxacyclohexyl)oxycarbonyl]thiophene-3-sulfonamide N-2-(3,4-(methylenedioxy)phenylacetyl]thiophene-3-1.8' 32.5' sulfonamide N-(4-chloro-3-methyl-5-isoxazofyl)-2-[(4-0.023' 15' methoxyphenoxy)carbonyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(4-1 22' 9.7' methylphenoxy)carbony!]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[14-methoxy-0.043' 10.1' phenyl)acetyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyll-3-[(4-1.64' 22.8' methylphenoxy)methyl]thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(4-1.2' 15' methylphenoxy)methyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyll-3-(4-methyl-traps-0.94' 0.66' styryllthiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(4-methyl-0.347' 9.4' phenethyllthiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(4-methyl-0.198' 9.13' phenyl)acetyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[f3-0.030' 19.1' methoxyphenyllacetyl]thiophene-3-sulfonamide _ ...._.___._.T. . __......_ . _..... ._ ._.._..___ ._._._.___.. _..-. . .. .

COMPOUND ETa (~uM)'ETB (~uM)"

N-(4-chloro-3-methyl-5-isoxazolyl)-2-[a,~3-(ethylene-0.128' 2.09' dioxyf-3,4-(methylenedioxylphenethyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[,Q-(dimethyl-20.9' --100' amino)-3,4-(methylenedioxy)phenethy]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-{a-hydroxy-2.51 30' [3,4-Imethylenedioxy)phenyl]acetyl}thiophene-3-sul-fonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[(5-methyl-3-0.056' 92' isoxazolyl)aminocarbonyl]thiophene-3-sulfonamide N-f4-bromo-3-methyl-5-isoxazolyl)-2-[(3-hydroxyl-6-0.066' 81.3' pyridazinyl)aminocarbonyl]thiophene-3-sulfonamide N-14-chloro-3-methyl-5-isoxazolyll2-{[2-acetyl-4,5-0.010' 31.6' 7 (methylenedioxy)phenyl]aminocarbonyl}thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-{(3,4-0.513' 9.6' (methylenedioxy)phenoxy]methyl}thiophene-2-su)fon-amide N--(4-bromo-3-methyl-5-isoxazolyl)-2-[(4-0.26' 0.4131 methyll(cinnamyl)] thiophene-3-sulfonamide N~-f4-chloro-3-methyl-5-isoxazolyl)-2-[(4,5-0.55' --dimethoxy-2-methoxycarbonylphenyl)aminocar-bonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[(2-methyl-0.13' --1 ,3,4-thiadiazol-5-yllaminocarbonyl]thiophene-3-sul-fonamide N-(4-chloro-3-methyl-5-isoxazolyl)2-{[2-carboxyl-1.431 _ 4,5-Imethylenedioxylphenyl]aminocarbonyl}thio-phene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-[3,4-0.236' 18' Imethylenedioxy)phenethyllthiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-[3,4-0.218' 10' (methylenedioxy)-traps-styryl]thiophene-2-sulfona-mide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(4-methyl)-0.106' 40.1' phenethyl)thiophene-3-sulfonamide COMPOUND ETA (NM)' ETB (~uM)*

N-(3,4-dimethyl-5-isoxazolyl)-2-{[2-acetyl-4,5-0.032' --(methylenedioxylphenyl]aminocarbonyl}thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[4-methoxy-2-0.027' 0.14' methylphenyllaminocarbonyl]thiophene-3-sulfona-mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-({2-cyano-4,5-0.0039' 12.2' dimethoxyphenyllaminocarbonyl]thiophene-3-sulfon-amide N-(3,4-dimethyl-5-isoxazolyl)-2-(4-tolylacetylphenyl)-0.0027' 29.2' thiophene-3-sulfonamide N-(3,4-dimethyl-5-isoxazolyl)-2-[3,4-(methylene-0.0273' 12.2' dioxy)phenylacetyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[(2,4-0.158' 63.1' dimethoxyphenyl)aminocarbonyl]thiophene-3-sulfon-amide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[(3-methyl-6-0.023' 43.7' pyridyl)aminocarbonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[2-hydroxy-4-0.006' --methylphenyl)aminocarbonyl]thiophene-3-sulfona-mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-{[2-cyano-4,5-0.0034' 40.4' (methylenedioxy)phenyl]aminocarbonyl}thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyll-2-[2-methyl-4,5-0.00301 355' (methylenedioxylphenylaminocarbonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-0.011' 61' carboxamido-4,5-dimethoxyphenylaminocar-bonyl)thiophene-3-sulfonamide N-(3,4-dimethyl-5-isoxazolyl)-2-(2,4-0.0027' 17.4' dimethylphenylacetyl)thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,4-dimethyl-0.0004' 4.8' phenylacetyl)thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-12,4-0.0008'" 3.6' dimethylphenylacetyl)thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[3,4-0.0073? 9.2' (methylenedioxy)]phenylaminocarbonyl-3-thio-phenesulfonamide ___._~...._____-_ _____ _._ .._....__~.____.__ -._..___.~.._ __.. .. _ , _ COMPOUND ETA (~uM)' ETB (pM)' N-(4-chloro-3-methyl-5-isoxazolyl)-2-[2-methyl-4,5-0.01464 52.782 (methylenedioxy)phenylacetyl]thiophene-3-sulfona-0.00624? 23.24' mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[3,4-0.00451 25.71 (methylenedioxy)-6-(2-acetoxyethyl)phenylaminocar-bonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyll-2-[3,4-0.00561 16.8' (methylenedioxy)-6-(2-hydroxyethyl)phenylaminocar-bonyllthiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3,5-dimethyl-0.045' 17.7' phenylacetyl)thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,5-0.0071 18' dimethylphenylacetyllthiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-12-0.00681 19.8' methanesulfonyiaminomethyl)-4,5-(methylenedioxy)phenylaminocarbonyl]thiophene-3-suifonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[2-cyanomethyl-0.0038' 251 4,5-(methylenedioxy)-6-cyanomethyl]phenylamino-carbonylthiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[2-0.0073' 8.3' hydroxypropyl-4,5-(methylenedioxylphenylaminocar-bonyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyll-3-[2-methyl-4,5--0.1'" -.6'"

(methylenedioxylcinnamyl]thiophene-2-sulfonamide N-14-bromo-3-methyl-5-isoxazolyl)-3-[2-methyl-4,5--0.1 t" -5'"

(methylenedioxy)phenethyl]thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-{[2-propyl-4,5--0.2'"' -.1.51' (methylenedioxy)phenoxy]methyl}thiophene-2-sul-fonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[3,4--0.021" -18' (methylenedioxy)-6-(2-acetoxyethoxy)]phenylamino-carbonyl]thiophene-3-sulfonamide N-14-chloro-3-methyl-5-isoxazolyl)-2-[3,4--0.01 t" - 18' (methylenedioxy)-6-(2-hydroxyethoxy)phenylamino-carbonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[2-cyano-4,5--0.31" . -0.7' (methyienedioxy)phenylacetyl]thiophene-3-sulfona-mide WO 9$/13366 PCT/US97/17402 COMPOUND ETA (wM)' ETB (~uM)' N-(4-chloro-3-methyl-5-isoxazolyl)-2-{2-0.009' 13.8' [(dimethylaminolcarbonylmethyl]-4,5-(methylene-dioxylphenylaminocarbonyl}thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyll-2-[2-methyl-4,5-0.794' 6.49' (~'nethylenedioxy)phenylhydroxyimino]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[2-methyl-4,5-0.0619' B.gOr (methylenedioxy)phenethyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyll-3-[2-0.0795' 3.24' (hydroxymethyl)-4,5-(methylenedioxy)cinnamyl]thio-phene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-{2-[(tetrahydro-0.0967' 4.14 4H-pyran-2-yloxylmethyl]-4,5-(methylenedioxylcinnamyl}thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(2,4-0.1006' 4.30' dimethylphenethyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(2,4-0.180' 2.g7t dimethylcinnamyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-(2,4-0.166' 2.g7' dimethylcinnamyl)thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-[(2,4-0.346' 7.45' dimethylphenoxy)methyl]thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(2,4-0.308' 4.48' dimethylphenoxy)methyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-5-(phenylamino-28.1' 60.6' carbonyl)thiophene-2-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyll-2-[/3-acetoxy-2-0.00544 3.74' methyl-4,5-(methylenedioxy)styryl]thiophene-3-sul-fonamide N-(4-chloro-3-methyl-5-isoxazolyll-2-[(2,3,4-0.00024' 6,ggg' trimethoxy-6-cyano)phenylaminocarbonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyll-2-[2-6.33' 8_g2' (cyano)phenyl]benzo[b]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[3,4-(methyl-0.550' 52.6' enedioxy)phenyl]benzo[b]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(2-tolyl)thio-0.324' 55.1, phene-2-sulfonamide _ _. _..._ T

COMPOUND ETA pMl~ ETB (NMy N-14-bromo-3-methyl-5-isoxazolyl)-3-(3-tolyl)thio-0.832' 21.2' phene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(2-tolyl)thio-0.302' 31 %@100' phene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(3-0.334' methoxyphenyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(3-1.32' 56.3' methoxyphenyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(2-1.71' 59.1' methoxyphenyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(4-0.184 43.9' ethylphenyl)thiophene-2-sulfonamide N-14-bromo-3-methyl-5-isoxazolyl)-3-(4-0.0873 8.48' propylphenyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyll-3-(4-iso-0.218 28.3' propylphenyllthiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyll-3-(4-0.160 6.11' butylphenyllthiophene-2-sulfonamide N-(3,4-dimethyl-5-isoxazolyl)-2-[2-methyl-4,5-0.00328' 34.3' (methylenedioxy)phenylacetyl]thiophene-3-sulfona-mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,4,6-0.00160' 11.272' trirnethylphenylaminocarbonyl)thiophene-3-sulfona-mide N-i4-chloro-3-methyl-5-isoxazolyl)-2-(2,4,6-tri-0.000238' 3.82' methylphenylacetyl)thiophene-3-sulfonamide N-14-chloro-5-methyl-3-isoxazolyl)-2-(2-methyl-4,5-0.000625' 3.69' (methylenedioxy)phenylacetyl)thiophene-3-sulfona-mide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[2-methyl-4,5-0.0804' 3.28' (methylenedioxylcinnamyl]thiophene-3-sulfonamide N-14-bromo-3-methyl-5-isoxazolyl)-2-(2,4-0.0555' 3.48' dimethylphenethyllthiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[(4-0.000266' 9.78' methoxycarbonyl-2,6-dimethyl)phenylaminocar-bonyl]thiophene-3-sulfonamide N-14-chloro-3-methyl-5-isoxazolyll-2-4.41' 31 %@100' (phenoxycarbonyl)thiophene-3-sulfonamide COMPOUND ETA (~uM)' ETg (~uM)~

N-i4-bromo-3-methyl-5-isoxazolyll-2- 2.71' 20%@100' (phenoxycarbonyl)thiophene-3-sulfonamide N-(3,4-dimethyl-5-isoxazolyll-2-{[3,4-3.61' 30%@100' (methylenedioxylphenoxy]carbonyl}thiophene-3-sul-fonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(2-0.684' 105' methylphenoxy)carbonyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(3-1.20' 111' methylphenoxylcarbonyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(2,4-0.291' 43.2' dimethylphenoxylcarbonyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(2-0.761' 29%@100' methoxylphenoxylcarbonyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(3-0.79' 90' methoxylphenoxy)carbonyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(4-1.73' 111' methoxylphenoxy)carbonyl]thiophene-3-sulfonamide N-(3,4-dimethyl-5-isoxazolyl)-2-[14- 5.88' 13%@100' methoxylphenoxylcarbonyl]thiophene-3-sulfonamide N-(3,4-dimethyl-5-isoxazolyl)-2-[14- 2.5' 33%@100' methoxylphenoxylcarbonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[(4-3.2' 43%@100' methylphenoxy)carbonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-[(2,4-0.648' 68.5' dimethylphenoxy)carbonyl]thiophene-3-sulfonamide N-(3,4-dimethyl-5-isoxazolyl)-2-[(2,4-0.274' 21 %@100' dimethyiphenoxy)carbonyl]thiophene-3-sulfonamide N-14-bromo-3-methyl-5-isoxazolyl)-2-{[2-propyl-4,5-0.138' 11.9' (methylenedioxy)phenoxy]carbonyl}thiophene-3-sul-fonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-13-0.000321' 16.5' methoxycarbonyl-2,4,6-trimethylphenylaminocar-0.00092' --bonyl)thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-12,4-0.100' 60.3' dimethylphenyl)thiophene-2-sulfonamide N-(3,4-dimethyl-5-isoxazolyl)-2- 2.85' 31 %' (phenoxycarbonyl)thiophene-3-sulfonamide _ . _ 1._ . _ _ . ___~-.... _ _ _._..___.

COMPOUND ETA (,vM)~ETB (iuM)~

N-(4-bromo-3-methyl-5-isoxazolyl)-3-(4-iso-0.0823' 2.76' butylphenyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(4-iso-0.155' 3.31' pentylphenyllthiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-[12,4,6-0.0457' 4.68' trimethylphenoxy)methyl]thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-[(2,4,6-0.0562' 3.39' trimethylphenoxy)methyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyll-3-12,4,6-0.0490' 1.86' trimethylcinnamyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(2-methyl-4-0.0468' 3.63' propylphenyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(4-iso-butyl-2-0.0468' 1.66' methylphenyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(4-iso-pentyl-2-0.107' 2.40' methylphenyl)thiophene-2-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-{[3,4-0.302' 6.61' (methylenedioxy)phenoxy]methyl}thiophene-3-sul-fonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-{[4,5-0.107' 0.407' (methylenedioxy)-2-propylphenoxy]methyl}thio-phene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyll-2-(2,4,6-0.0417' 1.23' trimethylphenethyl)thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-3-(2,4,6-0.055' 1.62' trimethylphenethyl)thiophene-2-sulfonamide N--(3,4-dimethyl-5-isoxazolyl)-2-[(2,4,6-0.537' 8%@100' trimethylphenoxylcarbonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-((2,4,6-0.0776' 30,2' trimethylphenoxy)carbonyl]thiophene-3-sulfonamide N-(4-bromo-3-methyl-5-isoxazolyl)-2-((2,4,6-0.479' 24.5' trimethylphenoxy)carbonyl]thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-cyanomethyl-0.00118 38.782 2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sul-0.00065' 23.377' fonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-0.00177 106.066 carboxymethyl-2,4,6-trimethylphenylaminocar-0.00036' 14.632' bonyl)thiophene-3-sulfonamide COMPOUND ETA (,uM);ETB (~rM)' N-14-chloro-3-methyl-5-isoxazolyl)-2-(3-0.00086 729.577 acetoxymethyl-2,4,6-trimethylphenylaminocar-0.000121 1094.031 t bonyllthiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-0.00067 74.224 hydroxymethyl-2,4,6-trimethylphenylaminocar-0.00014' 48.771 r bonyllthiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazoiyll-2-(3-0.00100 1 14.040 methoxycarbonylmethyl-2,4,6-trimethylphenylamino-0.00012' 2.599' carbonyl)thiophene-3-sulfonamide N-14-chloro-3-methyl-5-isoxazolyl)-2-(3-0.01337' --dimethylaminomethyl-2,4,6-trimethylphenylamino-carbonyl)thiophene-3-sulfonamide, trifluoroacetic acid salt N-(4-chloro-3-methyl-5-isoxazolyl)-2-Ia-methyl-2-0.08531' --methyl-4,5-Imethylenedioxy)phenyiacetyl)thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(a-0.081101 --carboxylmethyl-2-methyl-4, 5-(methylenedioxy)phenylacetyl)thiophene-3-sulfona-mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-0.00162 67.622 methanesulfonylamino-2,4,6-trimethylphenylamino-0.00026' 67.866' carbonyl)thiophene-3-sulfonamide N-14-chloro-3-methyl-5-isoxazolyl)-2-(2-carbamoyl-0.00146' 11.885' 4,6-dimethylphenylaminocarbonyllthiophene-3-sul-fonamide N-14-chloro-3-methyl-5-isoxazolyl)-2-(3-hydroxy-0.00171 18.676 2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sul-0.00082' t 8.672' fonamide N-(4-chloro-3-methyl-5-isoxazoiyl)-2-(3-carboxyl-0.01191' 22.387' 2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sul-fonamide N-14-chloro-3-methyl-5-isoxazolyl)-2-(2-carboxyl-4,6-0.02831' 16.982' dimethylphenylaminocarbonyl)thiophene-3-sulfona-mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2-phenyl-4,6-0.01589' 29.512' dimethylphenyiaminocarbonyl)thiophene-3-sulfona-mide N-14-chloro-3-methyl-5-isoxazolyll-2-(3-cyano-2,4,6-0.00152 57.231 trimethylphenylaminocarbonyl)thiophene-3-suifona-0.00036' 17.270?

mide _.__T _-.___.. _ _ ....... _._~..~_. ___ _._ COMPOUND ETA (~uM)' ETB (~uM)' N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-sulfamoyl-0.00092 25.520 2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sul-0.000591 10.416' fonamide N-14-chloro-5-methyl-3-isoxazolyl)-2-(3-cyanomethyl-0.00088 7.540 2,4,6-trimethylphenylaminocarbonyllthiophene-3-sul-~ 0.000071 1 .740' fonamide N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-0.00051 19.699 acetoxymethyl-2,4,6-trimethylphenylaminocar-0.00039' g,5g7' bonyl)thiophene-3-sulfonamide N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-0.000881 3.083' hydroxymethyl-2,4,6-trimethylphenylaminocar-bonyl)thiophene-3-sulfonamide -trimethylphenylaminocarbonyl)thiophene-3-sulfona-0.00066' 9.550' mide N-(3,4-dimethyl-5-isoxazolyll-2-(3-cyanomethyl-0.00156 22.772 2,4,6-trimethylphenylaminocarbony!)thiophene-3-sul-0.00025' 2.590' fonamide N-(3,4-dimethyl-5-isoxazolyl)-2-(3-acetoxymethyl-0.00097' 155.955' 2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sui-fonamide N-(3,4-dimethyl-5-isoxazolyll-2-(3-hydroxymethyl-0.00'! 1 33.806' 1' 2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sul-fonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-0.02985' 30.974' (pentamethylphenylaminocarbonyl)thiophene-3-sul-fonamide N-(4-chloro-3-methyl-5-isoxazolyll-2-(2,4,6-17,458.222'69.183?

trimethyibenzylaminocarbonyllthiophene-3-sulfona-mide N-4-chloro-3-methyl-5-isoxazolyl)-2-(3-cyanomethyl-0. 53101 81.470' 2,4,6-trimethylbenzylaminocarbonyl)thiophene-3-sul-fonamide ~' results are generally the average of 2 to 5 experiments * * preliminary results or results in which one or more data points were only determined approximately ' assay performed with incubation at 24° C. As described in the Examples, incubation at the higher temperature reduces the activity by a factor of 2- to about 10-compared to the activity at 4° C
-- data not available or measured as % inhibition @ 100 pM
inhibition @ 100 ErM

It is understood that 4-bromo or 4-chloro groups can be replaced by other 4-halo substituents or other suitable substituents for R', such as alkyl.
Among the preferred compounds are:
N-{4-chloro-3-methyl-5-isoxazolyl)-2-[(2,3,4-trimethoxy-6-cyano)phenyl-aminocarbonyllthiophene-3-sulfonamide, N-(4-chioro-3-methyl-5-isoxazolyl)-2-(3-methoxycarbonyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide, N-(4-chloro-3-methyl-5-isoxazoiyl?-2-(3-cyanomethyl-2,4, 6-trimethyiphenylamino-carbonyl)thiophene-3-sulfonamide, N-{4-chloro-3-methyl-5-isoxazolyl)-2-(3-carboxymethyl-2,4,6-trimethylphenylaminocarbonyllthiophene-3-sulfonamide, N-(4-chloro-3-methyl-5-isoxazolyll-2-(3-acetoxymethyl-2,4,6-trimethylphenylamino-carbonyllthiophene-3-sulfonamide, N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-hydroxymethyl-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide, N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-methoxycarbonytmethyl-2,4,6-trimethyl-phenylaminocarbonyllthiophene-3-sulfonamide, N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-dimethylaminomethyl-2,4,6-trimethylphenylaminocarbonyl)thio-phene-3-sulfonamide, trifluoroacetic acid salt, N-(4-chioro-3-methyl-5-isoxazolyl)-2-(a-methyl-2-methyl-4,5-(methylenedioxy)phenylacetyllthiophene-3-sulfonamide, N-(4-chloro-3-methyl-5-isoxazolyl)-2-(a-carboxylmethyl-2-methyl-4,5-(methylenedioxylphenylacetyl)thiophene-3-sulfonamide N-(4-chioro-3-methyl-5-isoxazolyll-2-(3-methanesulfonylamino-2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyll-2-(2-carbamoyl-4,6-dimethylphenylaminocar-bonyl)thiophene-3-sulfonamide, N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-hydroxy-2,4,6-trimethylphenylaminocar-bonyl)thiophene-3-sulfonamide, N-{4-chloro-3-methyl-5-isoxazolyl)-2-(3-carboxyl-2,4, 6-trimethylphenylaminocar-bonyl)thiophene-3-sulfonamide, N-f4-chloro-3-methyl-5-isoxazolyl)-2-(2-carboxyl-4,6-dimethylphenylaminocar-bonyl)thiophene-3-sulfonamide, N-(4-chforo-3-methyl-5-isoxazolyll-2-(2-phenyl-4,6-dimethylphenylaminocar-bonyl)thiophene-3-sulfonamide, _77_ N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-cyano-2,4,6-trimethylphenylaminocar-bonyl)thiophene-3-sulfonamide, N-(4-chloro-3-methyl-5-isoxazolyl)-2-(3-sulfamoyl-2,4,6-trimethylphenylaminocar-bonyl)thiophene-3-sulfonamide, N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethyfphenylamino-carbonyllthiophene-3-sulfonamide, N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-acetoxymethyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfonamide, N-(4-chloro-5-methyl-3-isoxazolyl)-2-(3-hydroxymethyl-2,4,6-trimethyfphenyl-aminocarbonyl)thiophene-3-sulfonamide, -trimethylphenylaminocarbonyl)thiophene-3-sulfonamide, N-(3,4-dimethyl-5-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenylaminocar-bonyllthiophene-3-sulfonamide, N-(3,4-dimethyl-5-isoxazolyl)-2-(3-acetoxymethyl-2,4,6-trimethylphenylaminocar-bonyllthiophene-3-sulfonamide, N-(3,4-dimethyl-5-isoxazolyl)-2-(3-hydroxymethyl-2,4,6-trimethylphenylaminocar-bonyllthiophene-3-sulfonamide, N-(4-chloro-3-methyl-5-isoxazolyl)-2-(pentamethylphenylaminocarbonyl)thio-phene-3-sulfonamide Table 2 lists oral half-life, bioavailability, and in vivo activity of selected exemplarly compounds. The in vivo activity was measured in a pulmonary hypertension model and is a measure of the activity of the compounds at selected dosages. As Table 2 indicates, the compounds claimed herein exhibit improved oral half-life, bioavailabiiity, and/or in vivo activity over those disclosed previously (see, e-p., PCT International Publication No. WO 96/31492).

COMPOlJND PaP~'POt"Z Peak in vivo in PlasmaEfficacyd Ratb Levels' N-(4-chloro-3-methyl-5-isoxazolyll-2-2.32 4.1 173 + +

[2-methyl-4,5-Imethylenedioxy)phenyl-acetyl ]thiophene-3-sulfonamide WO 98/13366 PCT/(1597/17402 _78_ COMPOUND PePPaPOt"2 Peak in vivo in PlasmaEfficacyd Ratb Levels' N-14-chloro-3-methyl-5-isoxazolyl)-2-0.58 [12, 3,4-trimethoxy-6-cyano)phenyl-aminocarbonyl]thiophene-3-sulfona-mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-1 3.4 40.2 + +
.78 (3-cyanomethyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfona-mide N-(4-chloro-3-methyl-5-isoxazolyl)-2-1.69 (3-methoxycarbonylmethyl-2,4,6-trimethylphenylaminocarbonyl)thio-phene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2-1.10 (3-carboxymethyl-2,4,6-trimethyl-phenylaminocarbonyllthiophene-3-sul-fonamide N-14-chloro-3-methyl-5-isoxazolyl)-2-1.46 (3-acetoxymethyl-2,4,6-trimethyl-phenylaminocarbonyl)thiophene-3-sul-fonamide N-14-chloro-3-methyl-5-isoxazolyl)-2-1.56 1.5 3 -/+

(3-hydroxymethyl-2,4,6-trimethyl-phenylaminocarbonyl)thiophene-3-sul-fonamide N-14-chloro-3-methyl-5-isoxazolyl)-2- 5.9 2.6 (3-methanesulfonylamino-2,4,6-trimethylphenylaminocarbonyl)thio-phene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2- 7 5.6 + +

(3-hydroxy-2,4,6-trimethylphenylamino-carbonyl)thiophene-3-sulfonamide N-(4-chloro-3-methyl-5-isoxazolyl)-2- 3.9 20 + +

(3-cyano-2,4,6-trimethylphenylamino-carbonyl}thiophene-3-sulfonamide N-14-chloro-3-methyl-5-isoxazolyl)-2- 3.4 2.8 (3-sulfamoyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfona-mide _._. _ __..._ ___. ......__.-__.___~ _. _ .

_79_ COMPOUND PappePOt"2Peak in vivo in PlasmaEfficacy Ratb Levels' N-(4-chloro-5-methyl-3-isoxazolyl)-2- 25.6 13 -(3-cyanomethyl-2,4,6-trimethylphenyl-aminocarbonyl)thiophene-3-sulfona-mide N-(3,4-dimethyl-5-isoxazolyl)-2-(3- 1.8 10.9 cyanomethyl-2,4,6-trimethylphenyl-aminocarbonyllthiophene-3-sulfona-mide a x 106 cm/sec in hours in,ug/mL
° Pulmonary Hypertension model: + + effective at 5 mg/kg no effect at 5 mg/kg + effective at 15 mg/kg B. Preparation of the compounds The preparation of some of the above and other compounds that possess the requisite acitivities are set forth in the Examples. Compounds whose synthesis is not explicitly exemplified can be synthesized by routine modification of one or more methods described in detail in the Examples by substituting appropriate readily available reagents.
Many of the compounds described herein are 3-suifamoyl-2-arylaminocar-bonylthiophene derivatives. In general, these compounds may be prepared by coupling of the appropriate 3-sulfamoylthienylcarboxylic acid with a substituted or unsubstituted aniline.
The 3-sulfamoylthienylcarboxylic acids may be prepared by a variety of methods known the those of skill in the art. In general, most of the syntheses involve the condensation of a carboalkoxythienylsulfonyl chloride with an aminoisoxazole in dry pryidine or in tetrahydrofuran (THF) and sodium hydride.
Subsequent hydrolysis of the carboalkoxy group provides the desired acids. The sulfonyl chorides and aminoisoxazoles either can be obtained commercially or synthesized according to methods described in the Examples or using other methods available to those of skill in this art lsee, e-g., U.S. Patent Nos.
4,659,369, 4,861,366 and 4,753,672).

For example, the thienylsulfonyl chlorides may be prepared by the following methods. A 3-sulfamoylthiophene precursor may be brominated at the 2-position by reaction with, for example, bromine or N-bromosuccinimide.
Subsequent metal-halogen exchange with an alkyllithium, e.g., n-butyllithium, and reaction with carbon dioxide provides the desired acid. Alternatively, a 2-thienylcarboxylic acid derivative may be sulfonated at the 3-position by reaction with, e.g., sulfur trioxide in sulfuric acid. Conversion of the resulting sulfonic acid to a sulfonyl chloride (by reaction with phosphorous pentachloride, phosphorous trichoride, phosphorous oxychloride, thionyl choride, or oxalyl choride) followed by reaction with the appropriate amine provides the desired sulfamoylthienylcarboxylic acid derivative. The intermediate sulfonyl chloride may also be prepared directly by reaction of the thienylcarboxylic acid derivative with chlorosulfonic acid.
The N-(alkylisoxazolyl)sulfonamides can be prepared by condensing an aminoisoxazole with a sulfonyl chloride in dry pyridine with or without the catalyst 4-/dimethylamino)pyridine. The N-(3,4-dimethyl-5-isoxazolyl)sulfona-mides and N-(4,5-dimethyl-3-isoxazolyl)sulfonamides can be prepared from the corresponding aminodimethylisoxazole, such as 5-amino-3,4-dimethylisoxazole.
For example, N-(3,4-dimethyl-5-isoxazolyl)-2-(carbomethoxy)thiophene-3-sulfona-mide was prepared from 2-methoxycarbonylthiophene-3-sulfonyl chloride and 5-amino-3,4-dimethylisoxazole in dry pyridine.
The N-(4-haloisoxazolyl)sulfonamides can be prepared by condensation of amino-4-haloisoxazole with a sulfonyl chloride in THF with sodium hydride as a base. For example, N-(4-bromo-3-methyl-5-isoxazolyl)thiophene-2-sulfonamide was prepared from 5-amino-4-bromo-3-methylisoxazole and thiophene-2-sulfonyl chloride in THF and sodium hydride.
These sulfonamides also can be prepared from the corresponding sulfonyl chloride and the aminoisoxazole in pyridine with or without a catalytic amount of 4-dimethylaminopyridine (DMAP). In some cases, the bis-sulfonyl compound is obtained as the major or exclusive product. The bis-sulfonated products can be readily hydrolyzed to the sulfonamide using aqueous sodium hydroxide and a suitable co-solvent, such as methanol or tetrahydrofuran, generally at room temperature.
The substituted anilines may be synthesized by nitration of the appropriate precursor substituted benzene with, e.g., a mixture of nitric and sulfuric acid, or nitronium tetrafluoroborate. Reduction of the resulting aromatic nitro compound with, e.g., zinc powder, catalytic hydrogenation, stannous chloride, or any other method known to those of skill in the art, affords the desired aniline.
Coupling of the thienylcarboxylic acid with the aniline may be accomplished by conversion of the acid to the corresponding acyl imidazole (by reaction with, e.g., carbonyldiimidazolel or acyl chloride (by reaction with, e.g., oxalyl choride or thionyl chloride), followed by reaction with the aniline to give the desired arylaminocarbonylthiophene compounds.
Some of the compounds described herein are 3-sulfamoyl-2-benzylamino-carbonylthiophene derivatives. In preparing these compounds, the aniline in the above preparation is replaced with a benzylamine. Appropriate benzylamines may be synthesized by reaction of the corresponding benzyl halide with azide, followed by reduction of the resulting benzyl azide by, e.g., catalytic hydrogenation or treatment with a trialkyl- or triarylphosphine.
Other compounds described herein are 3-sulfamoyl-2-arylacetylthiophene derivatives. These compounds may be generated by addition of an appropriate benzyimagnesium halide to a 3-sulfamoyl-2-thienylcarboxylic acid derivative, such as an N-methyl-N-methoxyamide. This amide may be prepared by reaction of the acid with carbonyldiimidazole, followed by reaction with N-methyl-N-methoxyamine.
Prodrugs and other derivatives of the compounds suitable for administration to humans may also be designed and prepared by methods known to those of skill in the art (see, e-g., Nogrady (19851 Medicinal Chemistry _A
Biochemical Approach, Oxford University Press, New York, pages 388-3921.
Compounds described herein have been synthesized and tested for activity in in vitro assays and, in some cases, in in vivo animal models.
Nuclear magnetic resonance spectroscopic INMR), mass spectrometric, infrared spectroscopic and high performance liquid chromatographic analyses indicated that the synthesized compounds have structures consistent with those expected for such compounds and are generally at least about 98% pure. All of the compounds exemplified or described herein exhibited activity as endothelia antagonists.
C. Evaluation of the bioactivity of the compounds Standard physiological, pharmacological and biochemical procedures are available for testing the compounds to identify those that possess any biological activities of an endothelia peptide or the ability to interfere with or inhibit endothelia peptides. Compounds that exhibit in vitro activities, such as the ability to bind to endothelia receptors or to compete with one or more of the endothelia peptides for binding to endothelia receptors can be used in the methods for isolation of endothelia receptors and the methods for distinguishing the specificities of endothelia receptors, and are candidates for use in the methods of treating endothefin-mediated disorders.
Thus, other preferred compounds of formulas I and II, in addition to those specifically identified herein, that are endothelia antagonists or agonists may be identified using such screening assays.
1. Identifying compounds that modulate the activity of an endothelia peptide The compounds are tested for the ability to modulate the activity of endothelia-1 . Numerous assays are known to those of skill in the art for evaluating the ability of compounds to modulate the activity of endothelia (see, e-g., U.S. Patent No. 5,1 14,918 to Ishikawa et al.; EP A1 0 436 189 to BANYU
PHARMACEUTICAL CO., LTD. /October 7, 1991 ); Borges et al. ( 1989) Eur. J.
Pharm. 165: 223-230; Filep et al. (1991) Biochem. Biophys. Res. Commun. 177:
171-176). In vitro studies may be corroborated with in vivo studies (see,-elg., U.S. Patent No. 5,114,918 to Ishikawa et al.; EP A1 0 436 189 to BANYU
PHARMACEUTICAL CO., LTD. (October 7, 1991 )) and pharmaceutical activity thereby evaluated. Such assays are described in the Examples herein and include the ability to compete for binding to ETA and ETB receptors present on _. _T_____~ _....... __._ ..... _._._... ___.__ _.__. _ membranes isolated from cell lines that have been genetically engineered to express either ETA or ETB receptors on their cell surfaces.
The properties of a potential antagonist may be assessed as a function of its ability to inhibit an endothelia induced activity in vitro using a particular tissue, such as rat portal vein and aorta as well as rat uterus, trachea and vas deferens (see e-g., Borges, R., Von Grafenstein, H. and Knight, D.E., "Tissue selectivity of endothelia," Eur. J. Pharmacol 165:223-230, (1989)1. The ability to act as an endothelia antagonist in vivo can be tested in hypertensive rats, ddy mice or other recognized animal models (see, Kaltenbronn et al. (1990) J. Med.
Chem. 33:838-845, see, also, U.S. Patent No. 5,114,918 to Ishikawa et al.; and EP A1 0 43f> 189 to BANYU PHARMACEUTICAL CO., LTD (October 7, 19911;
see, also Boiger et al. (1983) J. Pharmacol. Exp. Ther. 225291-309). Using the results of such animal studies, pharmaceutical effectiveness may be evaluated and pharmaceutically effective dosages determined. A potential agonist may also be evaluated using in vitro and in vivo assays known to those of skill in the art.
Endothelia activity can be identified by the ability of a test compound to stimulate constriction of isolated rat thoracic aorta (gorges et al. (1989) "Tissue selectivity of endothelia" Eur. J. Pharmacol. 165: 223-230). To perform the assay, the endothelium is abraded and ring segments mounted under tension in a tissue bath and treated with endothelia in the presence of the test compound.
Changes in endothelia induced tension are recorded. Dose response curves may be generated and used to provide information regarding the relative inhibitory potency of the test compound. Other tissues, including heart, skeletal muscle, kidney, uterus, trachea and vas deferens, may be used for evaluating the effects of a particular test compound on tissue contraction.
Endothelia isotype specific antagonists may be identified by the ability of a test compound to interfere with endothelia binding to different tissues or cells expressing different endothelia-receptor subtypes, or to interfere with the biological effects of endothelia or an endothelia isotype (Takayanagi et al.
(1991 ) Reg. Pep. 32: 23-37, Panek et al. (1992) Biochem. Biophys. Res. Commun. 183:
566-571 ). For example, ETg receptors are expressed in vascular endothelial cells, possibly mediating the release of prostacycfin and endothelium-derived relaxing factor (De Nucci et al. (1988) Proc. Natl. Acad. Sci. USA 85:9797).
ETA receptors are not detected in cultured endothelial cells, which express ET;.
receptors.
The binding of compounds or inhibition of binding of endothelin to ETg receptors can be assessed by measuring the inhibition of endothelin-1-mediated release of prostacyclin, as measured by its major stable metabolite, 6-keto PGF,o, from cultured bovine aortic endothelial cells (see, e~a., Filep et al.
(1 99 i 1 Biochem. and Biophys Res. Commun. 177: 171-176). Thus, the relative affinity of the compounds for different endothelin receptors may be evaluated by determining the inhibitory dose response curves using tissues that differ in receptor subtype.
Using such assays, the relative affinities of the compounds for ETA
receptors and ETB receptors have been and can be assessed. Those that possess the desired properties, such as specific inhibition of binding of endothelin-1, are selected. The selected compounds that exhibit desirable activities may be therapeutically useful and are tested for such uses using the above-described assays from which in vivo effectiveness may be evaluated (see, e-c~., U.S. Patent No. 5,248,807; U.S. Patent No. 5,240,910; U.S. Patent No.
5,198,548; U.S. Patent No. 5,187,195; U.S. Patent No. 5,082,838; U.S. Patent No. 5,230,999; published Canadian Application Nos. 2,067,288 and 2071 193;
published Great Britain Application No. 2,259,450; Published International PCT
Application No. WO 93/08799; Benigi et al. ( 1993) Kidney International 44:440-444; and Nirei et al. (1993) Life Sciences 52:1869-1874). Compounds that exhibit in vitro activities that correlate with in vivo effectiveness will then be formulated in suitable pharmaceutical compositions and used as therapeutics.
The compounds also may be used in methods for identifying and isolating endothelin-specific receptors and aiding in the design of compounds that are more potent endothelin antagonists or agonists or that are more specific for a particular endothelin receptor.
____T _....._.__ ._...

WO 98/133b6 PCT/US97/17402 2. Isolation of endothelia receptors A method for identifying endothelia receptors is provided. In practicing this method, one or more of the compounds is linked to a support and used in methods of affinity purification of receptors. By selecting compounds with particular specificities, distinct subclasses of ET receptors may be identified.
One or more of the compounds may be linked to an appropriate resin, such as Affi-gel, covalently or by other linkage, by methods known to those of skill in the art for linking endothelia to such resins (see, Schvartz et al.
(1990) Endocrinology 126: 3218-3222). The linked compounds can be those that are specific for ETA or ETB receptors or other subclass of receptors.
The resin is pre-equilibrated with a suitable buffer generally at a physiological pH (7 to 8). A composition containing solubifized receptors from a selected tissue are mixed with the resin to which the compound is linked and the receptors are selectively eluted. The receptors can be identified by testing them for binding to an endothelia isopeptide or analog or by other methods by which proteins are identified and characterized. Preparation of the receptors, the resin and the elution method may be performed by modification of standard protocols known to those of skill in the art (see, e-a., Schvartz et al. (1990) Endocrinology 126: 3218-3222).
Other methods for distinguishing receptor type based on differential affinity to any of the compounds herein are provided. Any of the assays described herein for measuring the affinity of selected compounds for endothelia receptors may also be used to distinguish receptor subtypes based on affinity for particular compounds provided herein. In particular, an unknown receptor may be identified as an ETA or ETB receptor by measuring the binding affinity of the unknown receptor for a compound provided herein that has a known affinity for one receptor over the other. Such preferential interaction is useful for determining the particular disease that may be treated with a compound prepared as described herein. For example, compounds with high affinity for ETA
receptors and little or no affinity for ETB receptors are candidates for use as hypertensive agents; whereas, compounds that preferentially interact with ETB
receptors are candidates for use as anti-asthma agents.

D. Formulation and. administration of the compositions Formulations of the sulfonamides are provided herein. The formulations are compositions designed for administration of the pharmaceutically acceptable derivatives, particularly salts of the sulfonamide compounds provided herein.
Because of the observed superior stability characteristics of the salts, compared to the neutral forms, such salts, particularly the sodium salts, are particularly suitable for oral and parenteral administration. Such compositions include solutions, suspensions, tablets, dispersible tablets, pills, capsules, powders, sustained release formulations and any other suitable formulation. Preferably the compositions will take the form of a pill or tablet. Methods for manufacture of tablets, capsules and other such formulations are known to those of skill in the art (see, e-A., Ansel, H.C (19851 Introduction to Pharmaceutical Dosacte Forms, 4th Edition, pp. 126-163).
In the formulations, effective concentrations of one or more pharmaceutically acceptable derivatives is (are) mixed with a suitable pharmaceutical carrier or vehicle. Preferably, the sulfonamide compounds are derivatized as the corresponding salts, preferably sodium salts, prior to formulation, as described above. The concentrations of the salts of the compounds in the formulations are effective for delivery of an amount, upon administration, that ameliorates the symptoms of the endothelin-mediated disease. Typically, the compositions are formulated for single dosage administration. To formulate a composition, the weight fraction of compound is dissolved, suspended, dispersed or otherwise mixed in a selected vehicle at an effective concentration such that the treated condition is relieved or ameliorated.
Pharmaceutical carriers or vehicles suitable for administration of the compounds provided herein include any such carriers known to those skilled in the art to be suitable for the particular mode of administration.
In addition, the compounds may be formulated as the sole pharmaceutically active ingredient in the composition or may be combined with other active ingredients. Liposomal suspensions, including tissue-targeted liposomes, may also be suitable as pharmaceutically acceptable carriers. These may be prepared _.___._ ...._._. _.___.. _ . .... _._____.___ _.
T __ -87_ according to methods known to those skilled in the art. For example, liposome formulations may be prepared as described in U.S. Patent No. 4,522,811.
The active compound as salt, preferably as a sodium salt, is included in the pharmaceutically acceptable carrier in an amount sufficient to exert a therapeutically useful effect in the absence of undesirable side effects on the patient treated. The therapeutically effective concentration may be determined empirically by testing the compounds in known in vitro and in vivo systems (see, e-g., U.S. Patent No. 5,1 14,918 to Ishikawa et al.; EP A1 0 436 189 to BANYU
PHARMACEUTICAL CO., LTD (October 7, 1991 ); Borges et al. (1989) Eur. J.
Pharm. 165: 223-230; : Filep et al. (1991 ) Biochem. Biophys. Res. Commun.
177: 171-176) and then extrapolated therefrom for dosages for humans.
The concentration of active compound sodium salt in the drug composition will depend on absorption, inactivation and excretion rates of the active compound, the physicochemical characteristics of the compound, the dosage schedule, and amount administered as well as other factors known to those of skill in the art. For example, the amount that is delivered is sufficient to treat the symptoms of hypertension. The effective amounts for treating endothelin-mediated disorders are expected to be higher than the amount of the sulfonamide compound that would be administered for treating bacterial infections.
Typically a therapeutically effective dosage should produce a serum concentration of active ingredient of from about 0.1 ng/ml to about 50-100 ,ug/ml. The pharmaceutical compositions typically should provide a dosage of from about 0.001 mg to about 2000 mg of compound per kilogram of body weight per day. Pharmaceutical dosage unit forms are prepared to provide from about 1 mg to about 1000 mg and preferably from about 10 to about 500 mg of the essential active ingredient or a combination of essential ingredients per dosage unit form.
The active ingredient may be administered at once, or may be divided into a number of smaller doses to be administered at intervals of time. It is understood that the precise dosage and duration of treatment is a function of the disease being treated and may be determined empirically using known testing _88_ protocols or by extrapolation from in vivo or in vitro test data. It is to be noted that concentrations and dosage values may also vary with the severity of the condition to be alleviated. It is to be further understood that for any particular subject, specific dosage regimens should be adjusted over time according to the individual need and the professional judgment of the person administering or supervising the administration of the compositions, and that the concentration ranges set forth herein are exemplary only and are not intended to limit the scope or practice of the claimed compositions.
Preferred pharmaceutically acceptable derivatives include acids, salts, esters, hydrates, solvates and prodrug forms. The derivative is selected to be a more stable form than the corresponding neutral compound. Preferred are pharmaceutically-acceptable salts. More preferred salts include alkali metal salts, particularly sodium salts, such as, but not limited to, a sodium hydrogen phosphate salt and a sodium salt, most preferrably the sodium salt.
Thus, effective concentrations or amounts of one or more of the compounds provided herein or pharmaceutically acceptable derivatives thereof are mixed with a suitable pharmaceutical carrier or vehicle for systemic, topical or local administration. to form pharmaceutical compositions. Compounds are included in an amount effective for ameliorating or treating the endothelin-mediated disorder for which treatment is contemplated. The concentration of active compound in the composition will depend on absorption, inactivation, excretion rates of the active compound, the dosage schedule, amount administered, particular formulation as well as other factors known to those of skill in the art.
The compositions are intended to be administered by an suitable route, which includes orally, parenterally, rectally and topically and locally depending upon the disorder being treated. For example, for treatment of ophthalmic disorders, such as glaucoma, formulation for intraocular and also intravitreal injection is contemplated. For oral administration, capsules and tablets are presently preferred. For parenteral administration reconstitution of a lyophilized powder, prepared as described herein, is preferred. The compounds in liquid, semi-liquid or solid form and are formulated in a manner suitable for each route _89_ of administration. Preferred modes of administration include parenteral and oral modes of administration.
Solutions or suspensions used for parenterai, intradermal, subcutaneous, or topical application can include any of the following components: a sterile diluent, such as water for injection, saline solution, fixed oil, polyethylene glycol, glycerine, propylene glycol or other synthetic solvent; antimicrobial agents, such as benzyl alcohol and methyl parabens; antioxidants, such as ascorbic acid and sodium bisulfite; chelating agents, such as ethylenediaminetetraacetic acid (EDTA); buffers, such as acetates, citrates and phosphates; and agents for the adjustment of tonicity such as sodium chloride or dextrose. Parenteral preparations can be enclosed in ampules, disposable syringes or single or multiple dose vials made of glass, plastic or other suitable material.
In instances in which the compounds exhibit insufficient solubility, methods for solubilizing compounds may be used. Such methods are known to those of skill in this art, and include, but are not limited to, using cosolvents, such as dimethylsulfoxide (DMSO), using surfactants, such as tween, or dissolution in aqueous sodium bicarbonate. Derivatives of the compounds, such as prodrugs of the compounds may also be used in formulating effective pharmaceutical compositions.
Upon mixing or addition of the sodium salt of the sulfonamide compound(s), the resulting mixture may be a solution, suspension, emulsion or the like. The form of the resulting mixture depends upon a number of factors, including the intended mode of administration and the solubility of the compound in the selected carrier or vehicle. The effective concentration is sufficient for ameliorating the symptoms of the disease, disorder or condition treated and may be empirically determined.
The formulations are provided for administration to humans and animals in unit dosage forms, such as tablets, capsules, pills, powders, granules, sterile parenteral solutions or suspensions, and oral solutions or suspensions, and oil-water emulsions containing suitable quantities of the compounds, particularly the pharmaceutically acceptable salts, preferably the sodium salts, thereof.
The pharmaceutically therapeutically active compounds and derivatives thereof are typically formulated and administered in unit-dosage forms or multiple-dosage forms. Unit-dose forms as used herein refers to physically discrete units suitable for human and animal subjects and packaged individually as is known in the art.
Each unit-dose contains a predetermined quantity of the therapeutically active compound sufficient to produce the desired therapeutic effect, in association with the required pharmaceutical carrier, vehicle or diluent. Examples of unit-dose forms include ampoules and syringes individually packaged tablet or capsule. Unit-dose forms may be administered in fractions or multiples thereof.
A multiple-dose form is a plurality of identical unit-dosage forms packaged in a single container to be administered in segregated unit-dose form. Examples of multiple-dose forms include vials, bottles of tablets or capsules or bottles of pint or gallons. Hence, multiple dose form is a multiple of unit-doses which are not segregated in packaging.
The composition can contain along with the active ingredient: a diluent such as lactose, sucrose, dicalcium phosphate, or carboxymethylcellulose; a lubricant, such as magnesium stearate, calcium stearate and talc; and a binder such as starch, natural gums, such as gum acaciagelatin, glucose, molasses, polvinylpyrrolidine, celluloses and derivatives thereof, povidone, crospovidones and other such binders known to those of skill in the art. Liauid pharmaceutically administrabfe compositions can, for example, be prepared by dissolving, dispersing, or otherwise mixing an active compound as defined above and optional pharmaceutical adjuvants in a carrier, such as, for example, water, saline, aqueous dextrose, glycerol, glycols, ethanol, and the like, to thereby form a solution or suspension. If desired, the pharmaceutical composition to be administered may also contain minor amounts of nontoxic auxiliary substances such as wetting agents, emulsifying agents, or solubilizing agents, pH
buffering agents and the like, for example, acetate, sodium citrate, cyclodextrine derivatives, sorbitan monolaurate, triethanolamine sodium acetate, triethanolamine oleate, and other such agents. Actual methods of preparing such dosage forms are known, or will be apparent, to those skilled in this art; for example, see Remington's Pharmaceutical Sciences, Mack Publishing Company, Easton, Pa., 15th Edition, 1 975. The composition or formulation to be _____._T . r_ __ _ _..__ _.._~__-_ ____..~_. _ . __..

administered will, in any event, contain a quantity of the active compound in an amount sufficient to alleviate the symptoms of the treated subject.
Dosage forms or compositions containing active ingredient in the range of 0.005% to 100% with the balance made up from non-toxic carrier may be prepared. For oral administration, a pharmaceutically acceptable non-toxic composition is formed by the incorporation of any of the normally employed excipients, such as, for example pharmaceutical grades of mannitol, lactose, starch, magnesium stearate, talcum, cellulose derivatives, sodium crosscarmellose, glucose, sucrose, magnesium carbonate or sodium saccharin.
Such compositions include solutions, suspensions, tablets, capsules, powders and sustained release formulations, such as, but not limited to, implants and microencapsulated delivery systems, and biodegradable, biocompatible polymers, such as collagen, ethylene vinyl acetate, polyanhydrides, polyglycolic acid, polyorthoesters, poiylactic acid and others. Methods for preparation of these formulations are known to those skilled in the art. he contemplated compositions may contain 0.001 %-100% active ingredient, preferably 0.1-85 %, typically 75-95%.
The salts, preferably sodium salts, of the active compounds may be prepared with carriers that protect the compound against rapid elimination from the body, such as time release formulations or coatings.
The formulations may be include other active compounds to obtain desired combinations of properties. The compounds of formula I, or a pharmaceutically acceptable salts and derivatives thereof as described herein, may also be advantageously administered for therapeutic or prophylactic purposes together with another pharmacological agent known in the general art to be of value in treating one or more of the diseases or medical conditions referred to hereinabove, such as beta-adrenergic blocker (for example atenolol), a calcium channel blocker (for example nifedipine), an angiotensin converting enzyme (ACE) inhibitor (for example lisinopril), a diuretic (for example furosemide or hydrochiorothiazide), an endothelin converting enzyme (ECE) inhibitor (for example phosphoramidonl, a neutral endopeptidase (NEP) inhibitor, an HMGCoA
reductase inhibitor, a nitric oxide donor, an anti-oxidant, a vasodilator, a dopamine agonist, a neuroprotective agent, a steroid, a beta-agonist, an anti-coagulant, or a thrombolytic agent. It is to be understood that such combination therapy constitutes a further aspect of the compositions and methods of treatment provided herein.
1. Formulations for oral administration Oral pharmaceutical dosage forms are either solid, gel or liquid. The solid dosage forms are tablets, capsules, granules, and bulk powders. Types of oral tablets include compressed, chewable lozenges and tablets which may be enteric-coated, sugar-coated or film-coated. Capsules may be hard or soft gelatin capsules, while granules and powders may be provided in non-effervescent or effervescent form with the combination of other ingredients known to those skilled in the art.
In certain embodiments, the formulations are solid dosage forms, preferably capsules or tablets. The tablets, pills, capsules, troches and the like can contain any of the following ingredients, or compounds of a similar nature: a binder; a diluent; a disintegrating agent; a lubricant; a glidant; a sweetening agent; and a flavoring agent.
Examples of binders include microcrystalline cellulose, gum tragacanth, glucose solution, acacia mucilage, gelatin solution, sucrose and starch paste.
Lubricants include talc, starch, magnesium or calcium stearate, lycopodium and stearic acid. Diiuents include, for example, lactose, sucrose, starch, kaolin, salt, mannitol and dicalcium phosphate. Glidants include, but are not limited to, colloidal silicon dioxide. Disintegrating agents include crosscarmellose sodium, sodium starch glycolate, alginic acid, corn starch, potato starch, bentonite, methylcelluiose, agar and carboxymethylcellulose. Coloring agents include, for example, any of the approved certified water soluble FD and C dyes, mixtures thereof; and water insoluble FD and C dyes suspended on alumia hydrate.
Sweetening agents include sucrose, lactose, mannitol and artificial sweetening agents such as sodium cyclamate and saccharin, and any number of spray dried flavors. Flavoring agents include natural flavors extracted from plants such as fruits and synthetic blends of compounds which produce a pleasant sensation, such as, but not limited to peppermint and methyl salicylate. Wetting agents ____._________~___ ___.__ .~._-.__ _ . _._.._ __...._.. _ include propylene glycol monostearate, sorbitan monooleate, diethylene glycol monolaurate and polyoxyethylene laural ether. Emetic-coatings include fatty acids, fats, waxes, shellac, ammoniated shellac and cellulose acetate phthalates.
Film coatings include hydroxyethylcellulose, sodium carboxymethylcellulose, polyethylene glycol 4000 and cellulose acetate phthalate.
If oral administration is desired, the salt of the compound could be provided in a composition that protects it from the acidic environment of the stomach. For example, the composition can be formulated in an enteric coating that maintains its integrity in the stomach and releases the active compound in the intestine. The composition may also be formulated in combination with an antacid or other such ingredient.
When the dosage unit form is a capsule, it can contain, in addition to material of the above type, a liquid carrier such as a fatty oil. In addition, dosage unit forms can contain various other materials which modify the physical form of the dosage unit, for example, coatings of sugar and other enteric agents.
The compounds can also be administered as a component of an elixir, suspension, syrup, wafer, sprinkle, chewing gum or the like. A syrup may contain, in addition to the active compounds, sucrose as a sweetening agent and certain preservatives, dyes and colorings and flavors.
The active materials can also be mixed with other active materials which do not impair the desired action, or with materials that supplement the desired action, such as antacids, H2 blockers, and diuretics. For example, if the compound is used for treating asthma or hypertension, it may be used with other bronchodilators and antihypertensive agents, respectively. The active ingredient is a compound or salt thereof as described herein. Higher concentrations, up to about 98% by weight of the active ingredient may be included.
Pharmaceutically acceptable carriers included in tablets are binders, lubricants, diluents, disintegrating agents, coloring agents, flavoring agents, and wetting agents. Enteric-coated tablets, because of the enteric-coating, resist the action of stomach acid and dissolve or disintegrate in the neutral or alkaline intestines. Sugar-coated tablets are compressed tablets to which different layers of pharmaceutically acceptable substances are applied. Film-coated tablets are compressed tablets which have been coated with a polymer or other suitable coating. Multiple compressed tablets are compressed tablets made by more than one compression cycle utilizing the pharmaceutically acceptable substances previously mentioned. Coloring agents may also be used in the above dosage forms. Flavoring and sweetening agents are used in compressed tablets, sugar-coated, multiple compressed and chewable tablets. Flavoring and sweetening agents are especially useful in the formation of chewable tablets and lozenges.
Liquid oral dosage forms include aqueous solutions, emulsions, suspensions, solutions and/or suspensions reconstituted from non-effervescent granules and effervescent preparations reconstituted from effervescent granules. Aqueous solutions include, for example, elixirs and syrups. Emulsions are either oil-in-water or water-in-oil.
Elixirs are clear, sweetened, hydroalcoholic preparations. Pharmaceutically acceptable carriers used in elixirs include solvents. Syrups are concentrated aqueous solutions of a sugar, for example, sucrose, and may contain a preservative. An emulsion is a two-phase system in which one liquid is dispersed in the form of small globules throughout another liquid. Pharmaceutically acceptable carriers used in emulsions are non-aqueous liquids, emulsifying agents and preservatives. Suspensions use pharmaceutically acceptable suspending agents and preservatives. Pharmaceutically acceptable substances used in non-effervescent granules, to be reconstituted into a liquid oral dosage form, include diluents, sweeteners and wetting agents. Pharmaceutically acceptable substance used in effervescent granules, to be reconstituted into a liquid oral dosage form, include organic adds and a source of carbon dioxide.
Coloring and flavoring agents are used in all of the above dosage forms.
Solvents include glycerin, sorbitol, ethyl alcohol and syrup. Examples of preservatives include glycerin, methyl and propylparaben, benzoic add, sodium benzoate and alcohol. Examples of non-aqueous liquids utilized in emulsions include mineral oil and cottonseed oil. Examples of emulsifying agents include gelatin, acacia, tragacanth, bentonite, and surfactants such as polyoxyethylene T _ _. ___ _ _._._.._ __.~__..._._.~..

sorbitan monooleate. Suspending agents include sodium carboxymethylcellulose, pectin, tragacanth, Veegum and acacia. Diluents include lactose and sucrose. Sweetening agents include sucrose, syrups, glycerin and artificial sweetening agents such as sodium cyclamate and saccharin. Wetting agents include propylene glycol monostearate, sorbitan monooleate, diethylene glycol monolaurate and polyoxyethylene lauryl ether.
Organic adds include citric and tartaric acid. Sources of carbon dioxide include sodium bicarbonate and sodium carbonate. Coloring agents include any of the approved certified water soluble FD and C dyes, and mixtures thereof.
Flavoring agents include natural flavors extracted from plants such fruits, and synthetic blends of compounds which produce a pleasant taste sensation.
For a solid dosage form, the solution or suspension, in for example propylene carbonate, vegetable oils or triglycerides, is preferably encapsulated in a gelatin capsule. Such solutions, and the preparation and encapsulation thereof, are disclosed in U.S. Patent Nos 4,328,245; 4,409,239; and 4,410,545. For a liquid dosage form, the solution, e-,g., for exmaple, in a polyethylene glycol, may be diluted with a sufficient quantity of a pharmaceutically acceptable liquid carrier, e.g. water, to be easily measured for administration.
Alternatively, liquid or semi-solid oral formulations may be prepared by dissolving or dispersing the active compound or salt in vegetable oils, glycols, triglycerides, propylene glycol esters (e.g. propylene carbonate) and other such carriers, and encapsulating these solutions or suspensions in hard or soft gelatin capsule shells. Other useful formulations include those set forth in U.S.
Patent Nos. Re 28,819 and 4,358,603.
In one embodiment, the formulations are solid dosage forms, preferably capsules or tablets. In a preferred embodiment, the formulations are solid dosage forms, preferably capsules or tablets, containing 10-100%, preferably 50-95%, more preferably 75-85%, most preferably 80-85%, by weight, of one or more sulfonamides or sulfonamide salts, preferably sodium hydrogen phosphate or sodium salts, more preferably the sodium salts, of one or more sul-fonamide compounds of formula I; about 0-25%, preferably 8-15%, of a diluent or a binder, such as lactose or microcrystalline cellulose; about 0 to 10%, 77718-35(S) preferably about 0-7%, of a disintegrant, such as a modified starch or cellulose polymer, particularly a cross-finked sodium carboxymethyl cellulose, such as crosscarmellose sodium (Crosscarmellose sodium NF is available commercially under the name AC-DI-SOL, FMC Corporation, Philadelphia, PA) or sodium starch glycolate; and 0-2°~ of a lubricant, such a magnesium stearate, talc and calcium stearate. The disintegrant, such as crosscarmellose sodium or sodium starch glycolate, provides for rapid break-up of the cellulosic matrix for immediate release of active agent following dissolution of coating polymer. In all embodiments, the precise amount of active ingredient and auxilliary ingredients i0 can be determined empirically and is a function of the route of administration and the diorder that is treated.
In an exemplary embodiment, the formulations are capsules containing about 50%-100%, preferably about 70-90%, more preferably about 80-90%, most preferably about 83 % of one or more sodium salts of one or more sulfona-mide compounds of formula 1; about 0-1 5%, preferably about 11 % of a diluent or a binder, such as lactose or microcrystalline cellulose; about 0-i 0%, preferably about 5% of a disintegrant, such as crosscarmellose sodium or sodium starch glycolate; and about 0 to 5 %, preferably about 1 % of a lubricant, such as magnesium stearate. Solid forms for administration as tablets are also contemplated herein.
In an exemplary preferred embodiment, the formulations are capsules containing 83% of one or more sodium salts of one or more sulfonamide compounds; 1 1 % of microcrystalline cellulose; 5 % of a disintegrant, such as Crosscarmellose sodium or sodium starch glycolate; and 1 °~6 of magnesium stearate.
The above embodiments may also be formulated in the form of a tablet, which may optionally be coated. Tablets will contain the compositions described herein.
In all embodiments, tablets and capsules formulations may be coated as known by those of skill in the art in order to modify or sustain dissolution of the active ingredient. Thus, for example, they may be coated with a conventional enterically digestible coating, such as phenylsalicylate, waxes and cellulose acetate phthalate.
2. Injectables, solutions and emulsions Parenteral administration, generally characterized by injection, either subcutaneously, intramuscularly or intravenously is also contemplated herein.
Injectables can be prepared in conventional forms, either as liquid solutions or suspensions, solid forms suitable for solution or suspension in liquid prior to injection, or as emulsions. Suitable excipients are, for example, water, saline, dextrose, glycerol or ethanol. In addition, if desired, the pharmaceutical compositions to be administered may also contain minor amounts of non-toxic auxiliary substances such as wetting or emulsifying agents, pH buffering agents, stabilizers, solubility enhancers, and other such agents, such as for example, sodium acetate, sorbitan monolaurate, triethanofamine oleate and cyclodextrins.
Implantation of a slow-release or sustained-release system, such that a constant level of dosage is maintained (see, e~g., U.S. Patent No. 3,710,795) is also contemplated herein. The percentage of active compound contained in such parenteral compositions is highly dependent on the specific nature thereof, as well as the activity of the compound and the needs of the subject.
Parenteral administration of the formulations includes intravenous, subcutaneous and intramuscular administrations. Preparations for parenteral administration include sterile solutions ready for injection, sterile dry soluble products, such as the lyophilized powders described herein, ready to be combined with a solvent just prior to use, including hypodermic tablets, sterile suspensions ready for injection, sterile dry insoluble products ready to be combined with a vehicle just prior to use and sterile emulsions. The solutions may be either aqueous or nonaqueous.
If administered intravenously, suitable carriers include physiological saline or phosphate buffered saline (PBS), and solutions containing thickening and solubilizing agents, such as glucose, polyethylene glycol, and polypropylene glycol and mixtures thereof.
Pharmaceutically acceptable carriers used in parenteral preparations include aqueous vehicles, nonaqueous vehicles, antimicrobial agents, 77718-35(S) isotonic agents, buffers, antioxidants, local anesthetics, suspending and dispersing agents, emulsifying agents, sequestering or chelating agents and other pharmaceutically acceptable substances.
Examples of aqueous vehicles include Sodium Chloride Injection, Ringers ~~ Injection, isotonic Dextrose Injection, Sterile Water Injection, Dextrose and Lactated Ringers Injection. Nonaqueous parenteral vehicles include fixed oils of vegetable origin, cottonseed oil, corn oil, sesame oil and peanut oil.
Antimicrobial agents in bacteriostatic or fungistatic concentrations must be added to parentei~al preparations packaged in multiple-dose containers which include phenols or 10' cresols, mercurials, benzyl alcohol, chlorobutanol, methyl and propyl p-hydroxybenzoic acid esters, thimerosal, benzalkonium chloride and benzethonium chloride. Isotonic agents include sodium chloride and dextrose.
Buffers include phosphate and citrate. Antioxidants include sodium bisulfate.
Local anesthetics include procaine hydrochloride. Suspending and dispersing i 5 agents include sodium carboxymethylcelluose, hydroxypropyl methylcellulose and polyvinylpyrrolidone. Emulsifying agents include Polysorbate 80 (Tween 80).
A sequestering or chelating agent of metal ions include EDTA. Pharmaceutical carriers also include ethyl alcohol, polyethylene glycol and propylene glycol for water miscible vehicles and sodium hydroxide, hydrochloric acid, citric acid or 20 lactic acid for pH adjustment.
The concentration of the pharmaceutically active compound is adjusted so that an injection provides an effective amount to produce the desired pharmacological effect. The exact dose depends on the age, weight and condition of the patient or animal as is known in the art.
25 The unit-dose parenteral preparations are packaged in an ampoule, a vial or a syringe with a needle. All preparations for parenteral administration must be sterile, as is know and practiced in the art.
Illustratively, intravenous or intraarterial infusion of a sterile aqueous solution containing an active compound is an effective mode of administration.
30 Another embodiment is a sterile aqueous or oily solution or suspension containing an active material injected as necessary to produce the desired pharmacological effect.

WO 98/133b6 PCT/US97/17402 _99_ Injectables are designed for local and systemic administration.
Typically a therapeutically effective dosage is formulated to contain a concentration of at least about 0.1 % w/w up to about 90% w/w or more, preferably more than 1 % w/w of the active compound to the treated tissue(s1.
The active ingredient may be administered at once, or may be divided into a number of smaller doses to be administered at intervals of time. !t is understood that the precise dosage and duration of treatment is a function of the tissue being treated and may be determined empirically using known testing protocols or by extrapolation from in vivo or in vitro test data. It is to be noted that concentrations and dosage values may also vary with the age of the individual treated. It is to be further understood that for any particular subject, specific dosage regimens should be adjusted over time according to the individual need and the professional judgment of the person administering or supervising the administration of the formulations, and that the concentration ranges set forth herein are exemplary only and are not intended to limit the scope or practice of the claimed formulations.
The compound may be suspended in micronized or other suitable form or may be derivatized to produce a more soluble active product or to produce a prodrug. The form of the resulting mixture depends upon a number of factors, including the intended mode of administration and the solubility of the compound in the selected carrier or vehicle. The effective concentration is sufficient for ameliorating the symptoms of the condition and may be empirically determined.
In many instances, the solutions of sodium salts, including the sodium salt and sodium hydrogen phosphate salts exhibit compared to the neutral compound. These salts also exhibit improved solubility over the neutral compound in aqueous media. The sodium salt was found, in certain aqueous formulations, to be as stable as the sodium hydrogen phosphate salt.
3. Lyophilized powders Of particular interest herein are lyophilized powders, which can be reconstituted for administration as solutions, emulsions and other mixtures.
They may also be reconsititude and formulated as solids or gels.

WO 98!13366 PCT/US97/17402 In particular embodiments, formulations of sodium hydrogen phosphate or sodium, preferably sodium, salts of the sulfonamide compounds, which possess increased stability relative to formulations of the neutral sulfonamides are provided. Specifically, formulation of sulfonamide sodium salts as a sterile, lyophilized powder are provided. These powders were found to have increased stability relative to formulations of the neutral sulfonamides.
The sterile, lyophilized powder is prepared by dissolving the sodium salt in a sodium phosphate buffer solution containing dextrose or other suitable excipient. Subsequent sterile filtration of the solution followed by lyophilization under standard conditions known to those of skill in the art provides the desired formulation. Briefly, the lyophilized powder is prepared by dissolving dextrose, sorbital, fructose, corn syrup, xylitol, glycerin, glucose, sucrose or other suitable agent, about 1-20%, preferably about 5 to 15%, in a suitable buffer, such as citrate, sodium or potassium phosphate or other such buffer known to those of skill in the art at, typically, about neutral pH. Then, a selected salt, preferably the sodium salt of the sulfonamide (about 1 gm of the salt per 10-100 gms of the buffer solution, typically about 1 gm/30 gmsl, is added to the resulting mixture, preferably above room temperature, more preferably at about 30-35° C, and stirred until it dissolves. The resulting mixture is diluted by adding more buffer (so that the resulting concentration of the salt decreases by about 10-50%, typically about 15-25%/. The resulting mixture is sterile filtered or treated to remove particulates and to insure sterility, and apportioned into vials for lyophilization. Each vial will contain a single dosage ( 100-500 mg, preferably 250 mg) or multiple dosages of the sulfonamide salt. The lyophilized powder can be stored under appropriate conditions, such as at about 4° C to room temperature. Details of an exemplary procedure are set forth in the Examples.
Reconstitution of this lyophilized powder with water for injection provides a formulation for use in parenteral administration of sodium salts of the sulfona-mides. For reconstitution about 1-50 mg, preferably 5-35, more preferably about 9-30 is added per ml of sterile water or other suitable carrier. The precise amount depends upon the indication treated and selected compound. Such amount can be empirically determined.
T
_ _ _._ .-..-. _...___ .____ ___. -__.~.._ . __.

77718-35(S) In one embodiment, the formulations contain lyophilized solids containing one or more sodium hydrogen phosphate or sodium, preferably sodium, salts of one or more sulfonamide compounds of formula I, and also contain one or more of the following:
a buffer, such as sodium or potassium phosphate, or citrate;
TM
a solubilizing agent, such as LABRASO~, DMSO, bis(trimethylsilyl)acetamide, ethanol, propyleneglycol (PG), or polyvinyipyrrolidine (PVP); and a sugar, such as sorbitol or dextrose.
In more preferred embodiments, the formulations contain one or more sodium hydrogen phosphate or sodium, preferably sodium, salts of one or more sulfonamide compounds of formula !; a buffer, such as sodium or potassium phosphate, or citrate; and a sugar, such as sorbitol or dextrose.
In the most preferred embodiments, the formulations contain one or more sodium salts of one or more sulfonamide compounds of formula I; a sodium phosphate buffer; and dextrose.
4. Topical administration Topical mixtures are prepared as described for the local and systemic administration. The resulting mixture may be a solution, suspension, emulsions or the like and are formulated as creams, gels, ointments, emulsions, solutions, elixirs, lotions, suspensions, tinctures, pastes, foams, aerosols, irrigations, sprays, suppositories, bandages, dermal patches or any other formulations suitable for topical administration.
The sodium salts and other derivatives of the compounds may be formulated as aerosols for topical application, such as by inhalation (see, e-g., U.S. Patent Nos. 4,044,126, 4,414,209, and 4,364,923, which describe aerosols for delivery of a steroid useful for treatment inflammatory diseases, particularly asthma). These formulations for administration to the respiratory tract can be in the form of an aerosol or solution for a nebulizer, or as a microfine powder for insufflation, alone or in combination with an inert carrier such as lactose. In such a case, the particles of the forrnufation will typically diameters of less than 50 microns, preferably less than 10 microns.

The sodium salts of the compounds may be formulated for local or topical application, such as for topical application to the skin and mucous membranes, such as in the eye, in the form of gels, creams, and lotions and for application to the eye or for intracisternal or intraspinal application. Topical administration is contemplated for transdermal delivery and also for administration to the eyes or mucosa, or for inhalation therapies. Nasal solutions of the active compound alone or in combination with other pharmaceutically acceptable excipients can also be administered.
These solutions, particularly those intended for ophthalmic use, may be formulated as 0.01 % - 10% isotonic solutions, pH about 5-7, with appropriate salts.
5. Articles of manufacture Finally, the derivatives, particularly the salts, acids, esters and prodrugs, preferably the sodium salts, of the compounds may be packaged as articles of manufacture containing packaging material, a salt, acid, ester or prodrug, preferably a sodium salt, of a compound provided herein, which is effective for antagonizing the effects of endothelia, ameliorating the symptoms of an endothelia-mediated disorder, or inhibiting binding of an endothelia peptide to an ET receptor with an IC5° of less than about 10 NM, within the packaging material, and a label that indicates that the compound or salt thereof is used for antagonizing the effects of endothelia, treating endothelia-mediated disorders or inhibiting the binding of an endothelia peptide to an ET receptor.
6. Formulations for other routes of administration Depending upon the condition treated other routes of administration, such as topical application, transdermal patches, an rectal administration are also contemplated herein.
For example, pharmaceutical dosage forms for rectal administration are rectal suppositories, capsules and tablets for systemic effect. Rectal suppositories are used herein mean solid bodies for insertion into the rectum which melt or soften at body temperature releasing one or more pharmacologically or therapeutically active ingredients. Pharmaceutically acceptable substances utilized in rectal suppositories are bases or vehicles and _ _. ____~._T _. __._.._._ _._.._._._. _ ... __..__ .... ...__ _.. ....... _ agents to raise the melting point. Examples of bases include cocoa butter (theobroma oil), glycerin-gelatin, carbowax, (polyoxyethylene glycol) and appropriate mixtures of mono-, di- and triglycerides of fatty acids.
Combinations of the various bases may be used. Agents to raise the melting point of suppositories include spermaceti and wax. Rectal suppositories may be prepared either by the compressed method or by molding. The typical weight of a rectal suppository is about 2 to 3 gm.
Tablets and capsules for rectal administration are manufactured using the same pharmaceutically acceptable substance and by the same methods as for formulations for oral administration.
The following examples are included for illustrative purposes only and are not intended to limit the scope of the invention.

Methyl2-(3-13-(4-Chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarboxamido)-2,4,6-trimethylphenyl)acetate A. Methyl3-Amino-2,4,6-trimethylphenylacetate To a solution of 3-cyanomethyl-2,4,6-trimethylaniline (see Example 14, procedure C) (5 g, 28.7 mmol) in methanol (30 mL) was added concentrated sulfuric acid (30 mL) with cooling. The resulting mixture was heated under reflux for 8 h before it was allowed to coot to rt and diluted with water (100 mL). The mixture was stripped off methanol and the residue was basified with sodium carbonate and then extracted with ethyl acetate. The organic layer was worked up and concentrated as usual to give the desired compound as an oi!
(5.2 g, 88%).
B. Methyl2-(3-(3-14-Chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarboxamido)-2,4,6-trimethylphenyl)acetate To a solution of N-(4-chloro-3-methyl-5-isoxazolyl)-3-sulfamoylthiophene-2-carboxylic acid (1 g, 3.1 mmol) in anhydrous N,N-dimethylformamide (20 mL) was added 1,1'-carbonyldiimidazole (553 mg, 3.41 mmol). After the gas evolution ceased, methyl 3-amino-2,4,6-trimethylphenylacetate (3.1 g, 15 mmol) was added and the resulting mixture was heated at 80 °C for 24 h. The mixture was allowed to cool to room temperature and poured to cold 0.5 M HCI (100 WO 98!13366 PCT/US97/17402 mL). The resulted precipitate was filtered and then purified by HPLC to give the desired compound as solid (mp 75-78 °C, 238 mg, 15%).

2-(3-(3-(4-Chioro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarboxamido)-2,4,6-trimethylphenyllacetic acid A solution of methyl 2-(3-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thienylcarboxamido)-2,4,6-trimethylphenyl)acetate (100 mg, 0.195 mmol) (Example 1 ) in 1 N NaOH (50 mL) was stirred at rt for 4 h before it was acidified with concentrated HCI to pH-1.2. The resulted white precipitate was filtered and dried on lyopholyzer to give 2-(3-(3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-thienylcarboxamidol-2,4,6-trimethylphenyl)acetic acid as a white solid (mp 110-113 °C, 74 mg, 76%).

Nz-(3-dimethylaminomethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide trifluoroacetate A. 3-Dimethylaminomethyl-2,4,6-trimethylaniline To a mixture of THF (20 mL) and dimethylamine (20 mL, 40% wt in water) at 0 °C was added 2,4,6-trimethylbenzyl chloride (5 g, 29.64 mmoll.
The mixture was allowed to warm up to room temperature and stirred for 4 h before THF was evaporated and the aqueous residue was extracted with ether.
The organic layer was worked up and concentrated as usual to give 2,4,6-trimethylphenyl-dimethylamine in quantitative yield. This compound was then nitrated and the resulted nitro compound reduced to the corresponding aniline as demonstrated in Example 14.
B. NZ-(3-dimethylaminomethyl-2,4,6-trimethylphenyl!-3-(4-chloro-3-methyl-5 isoxazolylsulfamoyl)-2-thiophenecarboxamide trifluoroacetate Nz-(3-dimethylaminomethyl-2,4,6-trimethylphenyl?-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide trifluoroacetate was synthesized and purified in the same fashion as for Example 1 as a powder (mp 92-94 °C, 18 % yield!.
T _._.

N2-(3-Methanesulfonamido-2,4,6-trimethyl)phenyl-3-(4-chloro-3-methyl-5-isoxazotyl)-2-thiophenecarboxamide A. 3-Methanesutfamido-2,4,6-trimethylaniline To a solution of 2,4,6-trimethyl-1,3-phenyienediamine 15,82 g, 38.76 mmol) and triethylamine (3.6 mL, 25.84 mmol) in ethyl acetate (100 mL) at 0 °C
was added methanesulfonyl chloride (2 mL, 25.84 mmol) dropwise. The mixture was stirred overnight. The resulted precipitate was filtered off and the filtrate was concentrated. The resulted solid was recrystallized from MeOH to give the desired product (3 g, 50% yield).
B. NZ-(3-Methanesulfonamido-2,4,6-trimethyt)phenyl-3-(4-chloro-3-methyl-5-isoxazolyl)-2-thiophenecarboxamide NZ-(3-Methanesulfonamido-2,4,6-trimethyl)phenyl-3-(4-chloro-3-methyl-5-isoxazolyl)-2-thiophenecarboxamide was synthesized and purified in the same fashion as in Example 1 as a powder (mp 130-133 °C, 19% yield).

N-(4-Chloro-3-methyl-5-isoxazolyl)-2-(2,4-dimethyl-6-aminocarbonylphenylamino-carbonyllthiophene-3-sulfonamide A. 2-Cyano-4,6-dimethylaniline To a solution of 2,4-dimethylaniline (9.80 g, 80.9 mmol) in dichloromethane (200 mL) at 0 °C was added N-bromosuccinimide ( 15.1 g, 84.9 mmol) slowly. The mixture was allowed to warmed to room temperature and stirred at room temperature overnight before it was washed with 1 N NaOH.
The organic layer was worked up and concentrated as usual. The residue was dissolved in N,N-dimethylformamide (120 mL) followed by the addition of cuprous cyanide ( 14.5 g, 161 .8 mmol). The mixture was heated under reflux for 8 h and then allowed to cool to rt and poured into water (i L). The mixture was treated with excess ethylenediamine and the precipitate was filtered, redissolved in ethyl acetate, dried with MgS04 and then concentrated to give the desired compound as an oil (6.7 g, 55%).

B. N-(4-Chloro-3-methyl-5-isoxazolyl)-2-(2,4-dimethyl-6-aminocar-bonylphenylaminocarbonyl)thiophene-3-sulfonamide N-(4-Chloro-3-methyl-5-isoxazolyl)-2-(2,4-dimethyl-6-aminocar-bonylphenyfaminocarbonyllthiophene-3-sulfonamide was synthesized and purified in the same fashion as for Example 14. The cyano group was hydrolyzed to the corresponding amide during deprotection of the MOM group.
N-(4-Chloro-3-methyl-5-isoxazolyll-2-(2,4-dimethyl-6-aminocarbonylphenylamino-carbonyllthiophene-3-sulfonamide was obtained as a solid (mp 40-43 °C, 61 %).

NZ-(3-Hydroxy-2,4,6-trimethyllphenyl-3-(4-chloro-3-methyl-5-isoxazolyllsulfamoyl-2-thiophenecarboxamide A. 3-Acetoxy-2,4,6-trimethylaniline To a solution of 2,4,6-trimethylphenol (10 g, 73.5 mmol) and triethylamine (1 1.1 g, 110./3 mmol) in ethyl acetate (200 mL) was added acetyl chloride (7.5 g, 95.6 mmoll dropwise at 0 °C. The mixture was stirred overnight. The reaction was quenched with water and the organic layer was washed with 1 N HCI. The organic layer was dried and concentrated as usual.
The residue was nitrated Example 14 (procedure B) and reduced as demonstrated for Example 14 (procedure C) to give 3-acetoxy-2,4,6-trimethyianiline.
B. NZ-(3-Hydroxy-2,4,6-trimethyllphenyl-3-(4-chloro-3-methyl-5-isoxazolyl)sulfamoyl-2-thiophenecarboxamide N2-(3-Hydroxy-2,4, 6-trimethyl)phenyl-3-(4-chloro-3-methyl-5-isoxazolyl)sulfamoyl-2-thiophenecarboxamide was synthesized and purified in the same fashion as for Example 14. The acetoxy group was hydrolyzed to the corresponding hydroxyl during deprotection of the MOM group. NZ-(3-Hydroxy-2,4,6-trimethyl)phenyl-3-(4-chloro-3-methyl-5-isoxazolyl)sulfamoyl-2-thio-phenecarboxamide was obtained as a solid (mp 75-78 °C, 54%).
T. ___.._._ _ . _.. _._.._~_~~_._v-_.-~._....

3-(4-Chioro-3-methyl-5-isoxazolyl)sulfamoyl-Nz-(3-carboxyl-2,4,s-trimethylphenyll-2-thiophenecarboxamide A. Allyl3-amino-2,4,6-trimethylbenzoate To a solution of 2,4,6-trimethylbenzoic acid (10 g, 61 mmol) in DMF (100 mL) were sequentially added potassium carbonate (17 g, 122 mrnol) and allyl bromide (11 g, 91.5 mmol). The mixture was stirred at rt overnight before it was poured into water ( - 1 L). The resulted precipitate was filtered and washed with water, then dried in vacuo to give allyl 2,4,6-trimethylbenzoate as a solid (10.2 g, 82%) which was nitrated and then reduced as shown for Example 14 (procedure B and C) to give allyl 3-amino-2,4,6-trimethylbenzoate.
B. 3-(4-Chioro-3-methyl-5-isoxazolyl)sulfamoyl-NZ-(3-carboxyl-2,4,6-trimethylphenyl)-2-thiophenecarboxamide 3-14-Chloro-3-methyl-5-isoxazolyl)sulfamoyl-Nz-(3-carboxyl-2,4,6-trimethylphenyl)-2-thiophenecarboxamide was synthesized and purified in the same fashion as for Example 14. The allyl group was deprotected using a literature procedure. 3-(4-Chloro-3-methyl-5-isoxazolyllsulfamoyl-NZ-(3-carboxyl-2,4,6-trimethylphenyl)-2-thiophenecarboxamide was obtained as a solid (mp 179-181 °C, 24%).

3-(4-Chloro-3-methyl-5-isoxazolyl)sulfamoyl-NZ-(2-carboxyl-4,6-dimethyl)phenyl-2-thiophenecarboxamide 3-(4-Chloro-3-methyl-5-isoxazolyl)sulfamoyl-N2-(2-carboxyl-4,6-dimethyl)phenyl-2-thiophenecarboxamide was synthesized and purified in the same fashion as for Example 14 using 2-amino-3,4-dimethylbenzoic acid. 3-(4-Chloro-3-methyl-5-isoxazolyllsulfamoyi-NZ-(2-carboxyl-4,6-dimethyl)phenyl-2-thiophenecarboxamide was obtained as a solid (mp 171-174 °C, 66%).

3-(4-Chlaro-3-methyl-5-isoxazolyl)sulfamoyl-NZ-(2-phenyl-4,6-dimethyl)phenyl-2-thiophenecarboxamide A. 2-Amino-3,5-dimethylbiphenyl 2-Bromo-4,6-dimethylaniline was coupled with phenyl boronic acid under Suzuki conditions to give 2-amino-3,5-dimethylbiphenyl in 68% yield.
B. 3-14-Chloro-3-methyl-5-isoxazolyl)sulfamoyl-N2-(2-phenyl-4,6-dimethyllphenyl-2-thiophenecarboxamide 3-(4-Chloro-3-methyl-5-isoxazolyl)sulfamoyl-NZ-(2-phenyl-4,6-dimethyl)phenyl-2-thiophenecarboxamide was synthesized and purified in the same fashion as in Example 14. 3-(4-Chloro-3-methyl-5-isoxazolyl)sulfamoyl-N2-(2-phenyl-4,6-dimethyl)phenyl-2-thiophenecarboxamide was obtained as a solid (mp 178-181 °C, 59%).

3-(4-Chloro-3-methyl-5-isoxazolyllsulfamoyl-NZ-(3-sulfamoyl-2,4,6-trimethyl)phenyl-2-thiophenecarboxamide A. 3-Sulfamoyl-2,4,6-trimethylaniline To a solution of mesitylenesulfonyl chloride (5 g, 22.9 mmol) in THF (50 mL) at 0 °C was added ammonium hydroxide (20 mL). The mixture was stirred at rt for 30 min before all the volatiles were evaporated. The resulted white solid was filtered off water and nitrated and reduced as demonstrated in Example 14 (procedure B and C) to give 3-sulfamoyl-2,4,6-trimethylaniline in 47%
yield.
B. 3-(4-Chlora-3-methyl-5-isoxazolyl)sulfamoyl-NZ-(3-sulfamoyl-2,4,6-trimethyl)phenyl-2-thiophenecarboxamide 3-(4-Chloro-3-methyl-5-isoxazolyl)sulfamoyl-N2-(3-sulfamoyl-2,4,6-trimethyl)phenyl-2-thiophenecarboxamide was synthesized and purified in the same fashion as in Example 14. 3-(4-Chloro-3-methyl-5-isoxazolyl)sulfamoyl-NZ-(3-sulfamoyl-2,4,6-trimethyl)phenyl-2-thiophenecarboxamide was obtained as a solid Imp 214-217 °C, 69%1.
T __ _._._. ..._ . _ _..__._____..__._ _.~_._ _._. . _.____~~-~.__ N-(4-Chloro-3-methyl-5-isoxazolyl)-2-(pentamethylphenylaminocarbonyl~thio-phene-3-sulfonamide A. Pentamethylaniline To a solution of pentamethylbenzene (5 g, 33.8 mmol) in dichloromethane (250 mL) at 0 °C was quickly added nitronium tetrafluoroborate (5 g). The mixture was stirred for 4 h before it was quenched with cold water.
The organic layer was concentrated and the residue was reduced (Example 14, procedure C) to give pentamethylaniline ih 52% yield.
B. N-(4-Chloro-3-methyl-5-isoxazolyl)-2-Ipentamethylphenylaminocar-bonyl)thiophene-3-sulfonamide N-14-Chloro-3-methyl-5-isoxazolyl)-2-(pentamethylphenylaminocar-bonyl)thiophene-3-sulfonamide was synthesized and purified in the same fashion as in Example 14. N-14-Chloro-3-methyl-5-isoxazolyl)-2-(pentamethylphenyl-aminocarbonyl)thiophene-3-sulfonamide was obtained as a solid (mp 196-198 °C, 69%).

N-(4-Chloro-3-methyl-5-isoxazolyl)-2-(2,4,6-trimethylphenylmethylaminocar-bonyl)thiophene-3-sulfonamide A. 2,4,6-Trimethylbenzylamine To a solution of 2,4,6-trimethylbenzyl chloride (5 g, 29.7 mmol) in DMSO
(20 mL) was added sodium azide (2.9 g, 44.6 mmol). The mixture was heated at 60 °C for 3 h before it was allowed to cool to rt and poured to water (200 mL). The resulted precipitate was filtered dissolved in wet THF (50 mL) followed by the addition of triphenylphosphine (15.6, 59.4 mmol). The mixture was heated under reflux for 3 h and the volatiles were evaporated. The residue was added to 1 N HCI (200 mL) and the solids were filtered off. The filtrate was basified and the resulted precipitate was filtered, dried under vacuum to give 2,4,6-trimethylbenzylamine (2.7 g, 61 % yield).

B. N-(4-Chloro-3-methyl-5-isoxazolyl)-2-(2,4,6-trimethylphenylmethylamino-carbonyl)thiophene-3-sulfonamide N-(4-Chloro-3-methyl-5-isoxazoiyl)-2-(2,4,6-trimethylphenylmethylamino-carbonyl)thiophene-3-sulfonamide was synthesized and purified in the same fashion as in Example 14. N-(4-Chloro-3-methyl-5-isoxazolyl)-2-(2,4,6-trimethyl-phenylmethylaminocarbonyl)thiophene-3-sulfonamide was obtained as a solid (mp 175-177 °C, 73%1.

N-(4-Chloro-3-methyl-5-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenylmethylaminocarbonyl)thiophene-3-sulfonamide A. 3-Cyanomethyl-2,4,6-trimethylbenzylamine To a solution of 1,3-bis(chloromethyll-2,4,6-trimethylbenzene (10 g, 46 mmol) in DMSO (30 mL) was added sodium cyanide (2.25 g, 46 mmol). The mixture was stirred at rt overnight before sodium azide (4.5 g, 69 mmol) was added. The mixture was heated at 80 °C for 3 h before it was poured into water (300 mL). The resulting precipitate was filtered to give a 2:1 :1.5 mixture of 3-cyanomethyl-2,4,6-trimethylbenzyl azide, 1,3-bis(cyanomethyl)-2,4,6-trimethylbenzene and 1,3-bislazidomethyl)-2,4,6-trimethylbenzene. This mixture was not separated but was treated with triphenylphosphine ( 18 g, 69 mmol) in wet THF. The reaction was conducted and worked up as in Example 12 (procedure A1 only that the HCI solution was basified with K2C03 until no more gas evolution observed. The mixture was extracted with dichloromethane and concentrated to give only the desired 3-cyanomethyi-2,4,6-trimethylbenzylamine (2g, 25% yieldl.
B. N-(4-Chloro-3-methyl-5-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethylphenylmethylaminocarbonyl)thiophene-3-sulfonamide N-(4-Chloro-3-methyl-5-isoxazolyl)-2-(3-cyanomethyl-2,4,6-trimethyiphenylmethylaminocarbonyllthiophene-3-sulfonamide was synthesized and purified in the same fashion as in Example 14. N-(4-Chloro-3-methyl-5-isoxazolyl)-2-f3-cyanomethyl-2,4,6-trimethylphenylmethylaminocarbonyllthio-phene-3-sulfonamide was obtained as a solid (mp 76-79 °C, 53%).
T
..._ ._ ._ ____._ __..___.__~.__.._._ N-(3-Cyanomethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide, N(sulfonamide)-Na-salt A. 2,4,6-Trimethylphenylacetoni rile To a mixture of a-chloroisodurene (5 g, 29.64 mmol) and sodium cyanide (5.8 g, 118.6 mmol) was added anhydrous DMSO (16 mL). The exothermic reaction was stirred until the reaction mixture was a room temperature again, then heated at 80°C for 30 min. To work up the reaction mixture was poured into water (200 mLl. The resulted white precipitate was filtered, washed with water, dried to give 2,4,6-trimethylphenylacetonitrile as a white powder (4.5 g, 95%).
B. 3-Cyanomethyl-1-vitro-2,4,6-trimethylbenzene To a suspension of 2,4,6-trimethylphenylacetonitrile (4.5 g) in acetic acid (40 mL) at RT was added dropwise 70% HN03 (20 mL) and conc. HZS04 (5 mL).
The brown reaction mixture was stirred for 1 h, poured into ice-water (500 mL).
The product was extracted into ethyl acetate, the extract was washed with water, dried over MgS04 and concentrated to give 3-cyanomethyl-1-vitro-2,4,6-trimethylbenzene as an oil (5.8 g, quantitative yield).
C. 3-Cyanomethyl-2,4,6-trimethylaniline To a solution of 3-cyanomethyl-1-vitro-2,4,6-trimethylbenzene (5.8 g in methanol (150 mL) were sequentially added ammonium chloride (6 g in 50 mL of water), zinc powder (6 g). The exothermic reaction was vigorously stirred until it was back to RT (2h). To work up the crude mixture was filtered off and the cake was washed with methanol. The methanolic solutions were concentrated and the residue partitioned between ethyl acetate and 1 N NaOH. The organic layer was dried over MgS04 and concentrated to give 3-cyanomethyl-2,4,6-trimethylaniline as a light brown solid (3.4 g, 69%).
D. 5-Amino-4-chloro-3-methylisoxazole To a solution of 5-Amino-3-methylisoxazole (9.8 g, 100 mmol) in methylene chloride (200 mL) was added N-Chlorosuccinimide (14.7 g, 110 mmol) at 0°C over the period of 20 min. The reaction mixture was stirred for 2h at RT. To work up the reaction mixture was concentrated and partitioned between 1N NaOH (150 mL)/ethyl acetate (400 mL). The organic layer was washed with 1 N NaOH, water, brine, dried over MgS04 then concentrated to a brown solid. For purification the product was reprecipitated from chloroform/hexane then recrystallized from ethyl acetate/hexane to give 5-amino-4-chloro-3-methylisoxazole as a brownish solid (5.5 g, 41 %).
E. 2-Carbomethoxy-3-[N-(4-chloro-3-methylisoxazol-5-yll]thiophenesulfona-mide To a slurry of 60% mineral oil suspension of NaH (8.5 g, 0.21 mol) in THF (100 mL) at -20°C was added a solution of 5-amino-4-chloro-3-methylisoxazole (12.4 g, 92.4 mmol) in anhydrous THF (65 mL) under nitrogen over a period of 20 min. After 10 min stirring was added a solution of 2-Carbomethoxy-3-thiophenesulfonyl chloride (22.2 g, 92.4 mmol) in THF (65 ml) at -20°C over 1 5 min. The reaction mixture was stirred for 10 min then quenched with H20 (5 ml) at the same temperature. To work up the reaction mixture was poured into 4N HCi and the product was extracted with ethyl acetate. The combined organics were washed with water then the compound was extracted with half-saturated NaHC03. The combined basic solutions were decolorized with activated charcoal, cooled to 0°C and acidified with 4N HCI.
The product was isolated by filtration, washed with water, dried to give 2-carbomethoxy-3-[N-(4-chloro-3-methylisoxazol-5-yl)]thiophenesulfonamide as a white powder (23.4 g, 75%).
F. 2-Carbomethoxy-3-[N-(4-chloro-3-methylisoxazol-5-yl)-N-MOM]thio-phenesulfonamide To a solution of 2-carbomethoxy-3-[N-(4-chloro-3-methylisoxazol-5-yl)]thiophenesulfonamide (3.3 g, 10.0 mmol) in THF (50 ml) diisopropyl ethyl amine (1 .9g, 15.0 mmol) was added at 0°C followed by addition of bromomethyl methyl ether (1.5 g, 12.0 mmol). The reaction mixture was stirred overnight at RT. To work up the reaction mixture was concentrated and partitioned between water and ethyl acetate. The organic layer was washed with water, brine, dried 'over MgS04, concentrated to give 2-carbomethoxy-3-[N-(4-chloro-3-methylisoxazol-5-yl)-N-MOM]thiophenesulfonamide as a greenish oil (3.5g, 90%1.
_ T __.___________ _ _~_.______~_._..______._._.

G. 2-Carboxy-3-(N-(4-chloro-3-methylisoxazot-5-yll-N-MOM)thiophenesulfon-amide 2-Carbomethoxy-3-[N-(4-chloro-3-methylisoxazol-5-yl)-N-MOM]thio-phenesulfonamide (3.Og, 7.8 mmol) in a mixture of THF (30 ml) and 1 N Na01-J
(30 ml) was stirred for 3h at RT. The reaction mixture was diluted with water (20 ml) and extracted with ethyl acetate (5 ml). The water solution was acidified with 1 N HCI then extracted with ethyl acetate. The organics were washed with water, brine, dried over MgS04 and concentrated to give 2-carboxy-3-[N-(4-chloro-3-methylisoxazol-5-yll-N-MOM]]thiophenesulfonamide as an oil (quantitative yield).
H. 3-[N-MOM-N-14-Chloro-3-methylisoxazol-5-y] laminosulfonyl]thiophene-2-carbonyl chloride To a solution of 2-carboxy-3-[N-(4-chloro-3-methylisoxazol-5-yl)-N-MOM]thiophenesulfonamide (1.5g, 4.1 mmol) in a mixture of THF (10 ml) and chloroform (5 ml) pyridine (1 drop) was added at 0°C followed by addition of 2M/L solution of oxalyl chloride (4.5 ml, 9.0 mmol). The reaction mixture was stirred overnight at RT. To work up the reaction mixture was concentrated under reduced pressure to remove all volatiles. The desired product was obtained as a sticky oil which solidifies upon standing.
I. 3-[N-MOM-N-(4-Chloro-e-methylisoxazol-5-yl)aminosulfonyl]thiophene-2-carboxylic acid, 3-cyanomethyl-2,4,6-trimethylanilide To a solution of 3-cyanomethyl-2,4,6-trimethylaniline 11.28, 6.9 mmol) in THF (20 ml) under nitrogen was added a solution of 3-[N-MOM-N-(4-Chioro-3-methylisoxazol-5-yl)aminosulfonyl]thiophene-2-carbonyl chloride ( 1.3 mg, 3.3 mmol) in THF (10 ml) at 0°C. The reaction mixture was allowed to warm up to RT and stirred for 2h. To work up the reaction mixture was poured into 0.05N
HCI and the product was extracted with ethyl acetate. The organics were washed with 0.05N HCI, water, half-saturated NaHC03, water, brine, dried over MgS04, concentrated. Purification via column chromatography (silica, 40%
ethyl acetate/hexane) gave 3-[N-MOM-N-(4-chloro-3-methylisoxazol-5-yl)aminosulfonyl]thiophene-2-carboxylic acid, 3-cyanomethyl-2,4,6-trimethyianilide as a clear oil (1.3g, 76%).

J. N-(3-Cyanomethyl-2,4,6-trimethylphenyll-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyll-2-thiophenecarboxamide, N(sulfonamide)-Na-salt A solution of 3-[N-MOM-N-(4-Chloro-3-methylisoxazol-5-yllaminosulfonyl]thiophene-2-carboxylic acid, 3-cyanomethyl-2,4,6-trimethylanilide (500mg, 0.95 mmol) in THF (4 ml) and conc. HCI (2 ml) was stirred at 65-72°C for 3.5h. To work up the reaction mixture was cooled and poured into water (50 ml). The product was taken into ethyl acetate. The extract was washed with water, brine saturated NaHC03, brine, dried over MgS04, concentrated as an oil. The oil was recrystallized from ethyl acetate/hexane to give N-(3-cyanomethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide as a white solid (410 mg, 91 %). The product (300mg, 0.63 mmol) was dissolved in ethyl acetate (70 ml).
The solution was washed with saturated NaHC03, brine, dried over MgS04, concentrated under reduced pressure. Methylene chloride ( 1 Oml) was added with stirring followed by addition of ether. Na-salt of N-(3-cyanomethyl-2,4,6-trimethylphenyl)-3-14-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thio-phenecarboxamide was precipitated as a white solid which was isolated by filtration (292mg, 92%). 'H NMR (DMSO-ds): 1.99 (s, 3H1; 2.13(s, 3H); 2.21 (s, 3H1; 2.33 (s, 3H); 3.90 (s,2H); 7.03 (s, 1 H); 7.43 (d, 2H); 7.72 (d, 1 H);
1 1 .1 5 (s, 1 H). IR (KBrI; 3445, 2977, 2258, 1602, 1417, 1 292, 1 132, 1090 cm-'. Elemental analysis found: C, 44.68; H, 3.92; N, 10.18. CZOH,gCIN4NaO4S2 ~ 2.0 H20 requires: C, 44.73; H, 4.13; N, 10.43.

2-(3-Acetoxymethyl-2,4,6-trimethylphenyly-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide, N(sulfonamide)-Na-salt A. 3-Nitro-2,4,6-trimethylbenzoic acid To a suspension of 2,4,6-trimethylbenzoic acid (4.6g, 28 mmol) in 70%
HN03 (85 ml) conc. HZSOQ (5 ml). was added dropwise at RT. The brown reaction mixture was stirred for 1 h, poured into ice-water (500 ml). The product was extracted into ethyl acetate, the extract was washed with water, dried over MgS04 and concentrated to give 3-nitro-2,4,6-trimethylbenzoic acid as a yellow solid (6.7g, 94%).
T . __. ___._._ .. _____~_.._.. _.......

B. 3-Nitro-2,4,6-trimethylbenzyl alcohol To a solution of 3-vitro-2,4,6-trimethylbenzoic acid (6.7g, 31.9 mmol) in anhydrous THF (100 ml) was added 1 M/L solution of BH3~THF in THF (63.8 ml, 63.8 mmol) dropwise at 0°C. The reaction mixture was stirred overnight at RT, cooled to 0°C and quenched with water. The product was extracted into ethyl acetate, the extract was washed with water, dried over MgS04 and concentrated to give 1-acetoxymethyl-3-vitro-2,4,6-trimethylbenzene as a light yellow oil (6.3g, 89%).
C. 3-Acetoxymethyl-2,4,6-trimethylaniline To a solution of 1-acetoxymethyl-3-vitro-2,4,6-trimethybenzene (6.Og, 25.2 mmol) in methanol (100 ml) were sequentially added ammonium chloride (2.7g in 25 ml of water), zinc powder (11g). The exothermic reaction was vigorously stirred until it was back to RT (2h). To work up the crude mixture was filtered off and the cake was washed with methanol. The methanolic solutions were concentrated to a volume of 20 ml, added 1 N HCI (300 ml). The insoluble material was removed by filtration, the solution was basified with solid NaHC03. The semicrystalline precipitate was taken into ethyl acetate. The extract was concentrated and the residual product purified by means of column chromatography (25% ethyl acetate/hexane) to give 3-Acetoxyrnethyl-2,4,6-trimethylaniline as a pink oil (3.8g, 75%1.
D. 3-(N-MOM-N-(4-Chloro-3-methylisoxazol-5-yl)aminosulfonyl]thiophene-2-carboxylic acid, 3-acetoxymethyl-2,4,6-trimethylanilide This compound was synthesized in the same fashion as for 3-[N-MOM-N-(4-chloro-3-methylisoxazol-5-yl)aminosulfonyl]thiophene-2-carboxylic acid, 3-cyanomethyl-2,4,6-trimethylanilide.
E. 2-(3-Acetoxymethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide, Nlsulfonamide)-Na-salt To a solution of 3-[N-MOM-N-(4-Chloro-5-methylisoxazol-3-yl)amino-sulfonyl]thiophene-2-carboxylic acid, 3-acetoxymethylanilide (400 mg, 0.90 mmol) in acetic acid (4 ml) at 50°C water (2ml) and 2N H2S04 (2 drops) were added afterwards the reaction mixture was stirred for 3.Oh at 75-80°C.
To work up the reaction mixture was cooled and poured into water (20 ml). The product was taken into ethyl acetate. The extract was washed with water, brine, dried over MgS04, concentrated to an oil. Column chromatography (10%
methanol/.methylene chloride) followed by trituration of the obtained oily material with ethyl acetate/hexane afforded 2-(3-acetoxymethyl-2,4,6-trimethylphenyll-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophene-carboxamide as a white powder (180mg, 49%). The above-material (240 mg, 0.47 mmol) was dissolved in ethyl acetate (70 m11. The solution was washed with saturated NaHC03, brine, dried over MgS04, concentrated under reduced pressure. Methylene chloride (10m1) was added with stirring followed by addition of ether. Na-salt of 2-(3-acetoxymethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide was precipitated as a white solid which was isolated by filtration (209mg, 83%). 'H NMR
(DMSO-d6); 1.98 (s, 3H); 2.02 (s, 3H); 2.13 (s, 3H); 2.17 (s, 3H); 2.31 (s, 3H1;
5.1 1 (s, 2H); 6.99 (s, 1 H); 7.41 (d, 2H); 7.71 (d, 1 H); 1 1.09 (s, 1 H). IR
(KBr):
3447, 2963, 1730, 1602, 1497, 1417, 1261, 1 133, 1089cm~'. Elemental analysis found: C, 44.94; H, 4.20; N, 7.12. CZ, H2,CIN3Na06S2 ~ 1.5 H20 requires: C, 44.96; H, 4.31; N, 7.44.

2-(3-Hydroxymethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazoiylsulfamoyl)-2-thiophenecarboxamide A solution of 2-(3-acetoxymethyl-2,4,6-trimethylphenyl)-3-(4-chloro-3-methyl-5-isoxazolylsulfamoyl)-2-thiophenecarboxamide (Example 15) (250 mg, 0.49 mmoll in anh. MeOH (5 ml) was cooled to 0°C and charged with 25%
solution of sodium methoxide in MeOH (1.08g, 5.0 mmoll. Stirred for 30 min at 0°C then the methanol was removed. Added 1 N HCL (10 ml). The comaound was taken into ethyl acetate. The extract was washed with water, brine, dried over MgS04, concentrated. The residue was dissolved in ethyl acetate then the product was precipitated by addition of hexane. This gave 2-(3-hydroxymethyl-2,4, 6-trimethylphenyl)-3-(4-chioro-3-methyl-5-isoxazolylsulfamoyl)-2-thio-phenecarboxamide as a white powder (205 mg, 90%). 'H NMR (DMSO-ds);
1 .99 (s, 3H1; 2.1 1 (s, 3H); 2.22(s, 3H); 2.31 (s, 3H); 4.47 (s, 2H); 6.91 (s, 1 H);
7.41 (d, 2H); 7.73 (d, 1 H); 10.83 (s, 1 H). IR (KBr): 3424, 2963, 1637, 1527, _ ..___._.~_.._._..__.__..__ __....______.._.. _.._ . _ .....

WO 9$/13366 PCT/US97/17402 1492, 141 1 , 1267, 1 186, 1 151, 1 109 cm-'. Elementaf analysis found: C, 48.50; H, 4.10; N, 8.63. C,gH2oCIN305S2 requires: C, 48.56; H, 4.29; N, 8.94.

3-14-Chloro-5-methylisoxazolyl-3-aminosulfonyllthiophene-2-carbaoxylic acid, N-(3-cyanomethyl-2,4,6-trimethyl)anilide, Na-salt A. 3-Cyanomethyl-2,4,6-trimethylaniline 3-Cyanomethyl-2,4,6-trimethylaniline was synthesized and purified as in Example 14.
B. 3-Amino-4-chloro-5-methyiisoxazole To a solution of 3-amino-5-methyfisoxazole (9.8g, 100 mmol) in methylene chloride (200 ml) was added N-chlorosuccinimide (14.6g, 110 mmol) at 0°C over the period of 20 min. The reaction mixture was stirred overnight.
To work up the reaction mixture was concentrated and partitioned between 1 N
NaOH ( 150 ml)/ethyl acetate (400 ml). The organic layer was washed with 1 N
NaOH, water, brine, dried over MgS04 then concentrated to a brown solid. For purification the product was reprecipitated from chloroformJhexane to give 3-amino-4-chioro-5-methylisoxazole as a brownish solid (9.5g, 71 %).
C. 2-Carbomethoxy-3-[N-(4-chloro-5-methylisoxazol-3-yll]thiophenesulfona-mide To a solution of 3-amino-4-chloro-5-methylisoxazole (6.1 g, 45.4 mmol) in anhydrous pyridine (7 ml) under nitrogen was added 2-carbomethoxy-3-thio phenesulfonyl chloride (14.2g, 59.0 mmol) at 0°C. The reaction mixture was allowed to warm up to RT and stirred for 2h. To work up the reaction mixture was poured into 1 N HCI and the product was extracted with ethyl acetate. The combined organics were washed with 1 N HCI, water then the compound was extracted with half-saturated NaHC03. the combined basic solutions were cooled to 0°C and acidified with 4N HCI. The product was isolated by filtration, washed with water, dried to give 2-carbomethoxy-3-[N-(4-chloro-5-methylisoxazol-3-yl)]thiophenesulfonamide as a white powder (5.3g, 34%).

D. 3-[N-MOM-N-(4-Chloro-5-methylisoxazol-3-yl)aminosulfonyl]thiophene-2-carbonyl chloride 3-[N-MOM-N-(4-Chloro-5-methylisoxazol-3-yl)aminosulfonyl]thiophene-2 carbonyl chloride was synthesized in the same fashion as for 3-[N-MOM-N-(4 Chloro-3-methylisoxazol-5-yl)aminosulfonyl]thiophene-2-carbonyl chloride (see EXAMPLE 14).
E. 3-[N-MOM-N-(4-Chloro-5-methylisoxazol-3-yl)aminosulfonyl]thiophene-2-carboxylic acid, 3-cyanomethyl-2,4,6-trimethylanilide 3-[N-MOM-N-(4-Chloro-5-methylisoxazol-3-yl)aminosulfonyl]thiophene-2-carboxylic acid, 3-cyanomethyl-2,4,6-trimethylanilide was synthesized in the same fashion as for 3-[N-MOM-N-(4-Chloro-3-methylisoxazol-5-yl)aminosulfonyl]thiophene-2-carboxylic acid, 3-cyanomethyl-2,4,6-trimethylanilide (see EXAMPLE 14).

3-(4-Chloro-5-methylisoxazolyl-3-aminosulfonyl)thiophene-2-carboxylic acid, N-(3-acetoxymethyl-2,4,6-trimethyllanilide 3-(4-Chloro-5-methylisoxazolyl-3-aminosulfonyl)thiophene-2-carboxylic acid, N-(3-acetoxymethyl-2,4,6-trimethyl)anilide as a free acid was synthesized in the same fashion as in Example 15. ' H NMR (DMSO-d6); 2.02 (3, 3H); 2.17 (m, 9H); 2.33 (s, 3H); 5.12 (s, 2H1; 6.97 (s, 1 H); 7.35 (d, 2H1; 7.62 (d, 1 H);
1 1.38 (s, 1 H). IR (KBr): 3444, 2963, 1734, 1634, 1 544, 1485, 1412, 1256, 1159, 1122 cm-'. Elemental analysis found: C, 45.03; H, 4.27; N, 7.16.
CZ,H22CIN306S2 ~ 1.5 H20 requires: C, 44.96; H, 4.31 ; N, 7.44.

3-(4-Chloro-5-methyfisoxazolyl-3-aminosulfonyllthiophene-2-carboxylic acid, N-(3-hydroxymethyl-2,4,6-trimethyl)anilide 3-(4-Chloro-5-methylisoxazolyl-3-aminosulfonyl)thiophene-2-carboxylic acid, N-(3-hydroxymethyl-2,4,6-trimethyl)anilide as a free acid was synthesized in the same fashion as in Example 16. 'H NMR (DMSO-d6): 2.15 (s, 3H1; 2.24 (s, 3H); 2.33 (m, 6H); 4.48 (s, 2H); 6.92 (s, 1 H); 7.43 (d, 2H); 7.80 (d, 1 H).
IR(KBr): 3443, 2963, 1641, 1522, 1490, 1184 cm''. Elemental analysis found:
C, 47.69; H, 4.24; N, 8.63. C,9HzoCIN3O5Sz ~ 0.5 H20 requires: C, 47.65; H, 4.42; N, 8.77.
_._.._-T .._ __ .-__ _ _.__. ... _ ._.__~.~.__.__. _... ___ _..._.___~...__._ 3-[N-(Benzo-1,2,7-thiadiazol-4-yllaminosulfonyl]thiophene-2-carboxylic acid, 3-cyanomethyl-2,4,6-trimethylanilide A. 3-Cyanomethyl-2,4,6-trimethylaniline 3-Cyanomethyl-2,4,6-trimethylaniline was synthesized and purified as in EXAMPLE 14.
B. 4-Aminobenzo-1,2,7-thiadiazole To a solution of 4-nitrobenzo-1,2,7-thiadiazole in a mixture of dioxane (22 ml) and ethanol (22 ml) at RT added solid SnClz followed by addition of water (1 ml). The reaction mixture Was warmed up to 50°C and stirred for 10 min, cooled to RT, concentrated and partitioned between ethyl acetate/1 N NaOH.
The organic layer was washed with 1 N NaOH, water, brine, dried over MgS04 and charcoal. Evaporation of the solvent gave 4-aminobenzo-1,2,7-thiadiazole as a yellow powder (3.Og, 88%1.
C. 2-Carbomethoxy-3-[N-(benzo-1,2,7-thiadiazol-4-yl)]thiophenesulfonamide 2-Carboxmethoxy-3[N-(benzo-1,2,7-thiadiazol-4-yllJthiophenesulfonamide was synthesized in the same fashion as for 2-carbomethoxy-3-[N-(4-chloro-5-methylisoxazol-3-yl)]thiophenesulfonamide (Example 17).
D. 3-[N-MOM-N-(Benzo-1,2,7-thiadiazol-4-yl)aminosulfonyi]-2-thio-phenecarbonyl chloride 3-[N-MOM-N-(Benzo-1,2,7-thiadiazol-4-yl)aminosulfonyl]-2-thio-phenecarbonyl chloride was synthesized in the same fashion as for 3-[N-MOM-N-(4-chloro-5-methylisoxazol-3-yllaminosulfonyl]-thiophene-2-carbonyl chloride (Example 14).
E. 3-[N-(Benzo-1,2,7-thiadiazol-4-yl)aminosulfonyl]thiophene-2-carboxylic acid, 3-cyanomethyl-2,4,6-trimethylanilide To a solution of 3-cyanomethyl-2,4,6-trimethylaniiine (400 mg, 2.27 mmol) in THF (3ml) at 0°C a solution of 3-[N-MOM-N-(benzo-1,2,7-thiadiazol-4-yl)aminosulfonyl]-2-thiophenecarbonyl chloride (442mg, 1 .08 mmol) in THF (5 mL) was added. The reaction mixture stirred for 2h at RT. The reaction mixture was poured into 1 N HCL and extracted with ethyl acetate. The extract was washed with 1 N HCI, water, brine, dried over MgS04, concentrated. Column chromatography (25% ethyl acetate/hexane on Silica Gel) followed by recrystallization of the obtained material from ethyl acetate/hexane gave 3-[N-(benzo-1,2,7-thiadiazol-4-yl)aminosulfonyl]thiophene-2-carboxylic acid, 3-cyanomethyl-2,4,6-trimethylanilide as a white solid (19 mg, 3.5%). 'H NMR
(DMSO-ds): 2.21 (s, 3H); 2.26 (s, 3H); 2.34 (s, 3H); 3.93 (s, 2H); 7.06 (s, 1 H);
7.48 (d, 1 H); 7.55 (m, 1 H); 7.72 (m, 1 H); 7.82 (d, 1 H); 7.99 (m, 1 H);
10.18 (s, 1 H); 10.80 (s, 1 H). IR(KBr): 3447, 3240, 2974, 1651, 1529, 1458, 1271, 1187, 1 145 cm-'.

NZ-(3-Cyanomethyl-2,4,6-trimethylphenyl)-3-[(3,4-dimethyl-5-isoxazolyllsulfamoyl]-2-thiophenecarboxamide, Na-salt A. 5-[N-(2-Carbomethoxythienyl-3-sulfonyl)amino]-3,4-dimethylisoxazole To a solution of 5-amino-3,4-dimethylisoxazole (2.0 g, 17.83 mmol) in dichloromethane (60 ml) were added triethylamine (5.5 ml, 39.24 mmol) and 4-dimethylaminopyridine (0.2g, 0.89 mmol), then cooled to O°C. 2-(Methoxycarbonyl)thiophenesulfonyl chloride (9.44 g, 39.22 mmol) was added.
The resulting mixture was stirred at room temperature overnight, Then mixed with water (60 mfl. The organic material was separated, and the aqueous layer was extracted with dichloromethane (2x30 ml). The extracts were combined and washed with water (60 ml) and saturated sodium chloride (60 ml), dried (MgS04), then concentrated to give 5-[N, N-bis(2-carbomethoxythienyl-3-sulfonyl)amino]-3,4-dimethylisoxazole (10.02 g, > 100%) as a brown oil. This crude product (10.02 g, 19.25 mmoll was dissolved in anhydrous methanol (64 ml). Potassium hydroxide (1.1 g, 19.25 mmol) was added at O°C, and stirred at O°C for 15 minutes. The mixture was acidified to pH 2 with concentrated hydrochloric acid, extracted with ethyl acetate (3x100 ml), washed with water (250 ml) and saturated sodium chloride (250 ml), dried (MgS04), then concentrated. The residue was purified by flash chromatography (SiOz, hexane:
ethyl acetate / 3:1 ) to give 5-[N-(2-carbomethoxythienyl-3-sulfonyl)amino]-3,4-dimethylisoxazole (5.43 g, 84%) as a yellow oil.

B. 5-[N-Methoxymethyl-f 2-carbomethoxythienyl-3-sulfonyl)amino]-3,4-dimethylisoxazole To a solution of 5-[N-(2-carbomethoxythienyl-3-sulfonyl)amino]-3,4 dimethylisoxazole (5.43 g, 17.16 mmol) in dichloromethane (50 ml) at 0°C was added N,N-diisopropylethylamine (9.0 ml, 51.49 mmol) followed by bromomethyl methyl ether (1.5 ml, 18.88 mmol). The resulting mixture was stirred at room temperature for 15 minutes, then quenched with saturated sodium bicarbonate.
The organic material was separated, and the aqueous layer was extracted with dichloromethane (2x25 ml). The extracts were combined and washed with water (50 ml) and saturated sodium chloride (50 ml), dried (MgS04), then concentrated. The residue was purified by flash chromatography (SiOz, hexane:
ethyl acetate / 6:1, then 3:1 ) to give 5-[N-methoxymethyl-(2-carbomethoxythienyl-3-sulforay])amino]-3,4-dimethylisoxazole (5.71 g, 92%) as a yellow oil.
C. 5-IN-Methoxymethyl-(2-carboxythienyl-3-sulfonyl)amino]-3,4-dimethylisoxazole To a solution of 5-[N-methoxymethyl-(2-carbornethoxythienyl-3-sulforay])amino]-3,4-dimethylisoxazole (5.71 g, 15.84 mmol) in THF (30 ml) was added a solution of sodium hydroxide (0.95 g, 23.77 mmol) in water (15 ml).
The mixture Was stirred at room temperature overnight. The reaction was acidified to pH 3 with 2N hydrochloric acid while cooling at O°C, then extracted with ethyl acetate (3x50 ml). The organic layer was washed with saturated sodium chloride (100 ml), dried (MgS04), and concentrated to give 5-[N-methoxymethyl-(2-carboxythienyl-3-sulforay])amino]-3,4-dimethylisoxazole (3.50 g, 64%) as a yellow solid.
D. 3-[N-3,4-Dimethylisoxazol-5-yl)-N-methoxymethylaminosulfonyl]-2-thio-phenecarbonyl chloride To a solution of 5-[N-methoxymethyl-(2-cargoxythienyl-3-sulfonyl)amino)-3,4-dimethylisoxazole (3.49 g, 10.08 mmol) in dichloromethane (20 ml) at O°C
was added pyridine (3 drops) followed by oxalyl chloride ( 1 1 ml, 22.17 mmol).
The mixture was stirred at room temperature overnight, then concentrated to dryness to give 3-[N-(3,4-dimethylisoxazol-5-yl)-N-methoxymethylaminosulfonyl]-2-thiophenecarbonyl chloride (4.01 g, > 100%) as a yellow oil.

E. NZ-(3-Cyanomethyl-2,4,6-trimethylphenyl)-3-[N-(3,4-dimethylisoxazol-5-yl)-N-methoxymethylaminosulfonyl]-2-thiophenecarboxamide To a solution of 3-[N-(3,4-dimethylisoxazol-5-yll-N-methoxymethylaminosulfonyl]-2-thiophenecarbonyl chloride (0.49 g, 1.34 mmol) in dichloromethane (4 ml) was added 3-cyanomethyl-2,4,6-trimethylaniline (0.24 g, 1.34 mmol) at 0°C. Triethylamine (0.21 ml, 1 .47 mmol) and 4-dimethylaminopyridine (16 mg, 0.13 mmol) were added. The mixture was stirred at room temperature for 2 hours, then mixed with water (10 ml). The organic material was separated, and the aqueous layer was extracted with dichforomethane f2x 5 mll. The extracts were combined and washed with water (10 mi) and saturated sodium chloride (10 ml), dried (MgS04), then concentrated. The residue was purified by flash chromatography (Si02, hexane:
ethyl acetate / 3:1, then 1 :1 ) to give Nz-(3-cyanomethyl-2,4,6-trimethylphenyl)-3-[N-(3,4-dimethylisoxazol-5-yl)-N-methoxymethylaminosulfonyl]-2-thio-phenecarboxamide (0.28 g, 41 %) as a yellow oil.
F. Nz-(3-Cyanomethyl-2,4,6-trimethylphenyi)-3-[(3,4-dimethyl-5 isoxazolyllsulfamoyl)-2-thiophenecarboxamide, Na-salt To a solution of N2-(3-cyanomethyl-2,4,6-trimethylphenyl)-3-[N-(3,4-dimethylisoxazol-5-yl)-N-methoxymethylaminosulfonyl]-2-thiophenecarboxamide (2.29 g, 4.56 mmol) in THF (10 ml) was added concentrated hydrochloric acid (5 ml). The reaction was heated at 65°C for 2 hours, then allowed to cool to room temperature. The mixture was poured into ice water ( 100 ml), extracted with ethyl acetate (3x100 mI), washed with saturated sodium chloride (150 ml}, dried (MgS04), then concentrated. The residue was purified by reverse-phase HPLC (20-80% acetonitrile in water). Acetonitrile was removed in vacuo. The aqueous layer was extracted with ethyl acetate (3x100 ml). The extracts were combined and washed with saturated sodium chloride (200 ml), then with saturated sodium bicarbonate (3x200 mll. The organic layer was washed with saturated sodium chloride (200 ml), dried (MgS04), then concentrated. The residue was purified by reverse-phase HPLC (20-80% acetonitrile in waterl.
Acetonitrile was removed in vacuo. The aqueous layer was extracted with ethyl acetate f 3x100 ml). The extracts were combined and washed with saturated sodium chloride (200 ml), then with saturated sodium bicarbonate (3x200 ml).
_T _ ... __.__.._._ ____ The organic layer was washed with saturated sodium chloride (200 ml), dried (MgS04), then concentrated. The residue was dissolved in water (300 ml) and lyophilized to give NZ-(3-cyanomethyl-2,4,6-trimethylphenyll-3-[(3,4-dimethyl-isoxazolyl)sulfamoyl]-2-thiophenecarboxamide, Na-salt (0.45 g, 21 %1 as a white powder, mp 153-173°C. 'H NMR (400 MHZ, DMSO-ds): 7.69 (d, J = 4.76 Hz, 1 H), 7.35 (d, J = 5.16 Hz, 1 H), 7.02 (s, 1 H), 3.90 (s, 2H1, 2.32 (s, 3H), 2.20 (s, 3H), 2.13 (s, 3H), 1.95 (s, 3H), 1.55 (s, 3H) ppm. IR (KBr): 3449, 2249, 1623, 1421, 1 121 cm'' .

Nz-(3-Acetoxymethyl-2,4,6-trimethylphenyl)-3-[(3,4-dimethyl-5-isoxazolyl)sulfamoyl]-2-thiophenecarboxamide and NZ-(3-Hydroxymethyl-2,4,6-trimethylphenyl]-3-[(3,4-dimethy!-5-isoxazolyllsulfamoyl]-2-thio-phenecarboxamide A. NZ-(3-Acetoxymethyl-2,4,6-trimethylphenyl)-3-[N-(3,4-dimethylisoxazol-5-yl]-N-methoxymethylaminosulfonyl]-2-thiophenecarboxamide To a solution of 3-[N-(3,4-dimethylisoxazol-5-yl)-N-methoxymethylaminosulfonyl]-2-thiophenecarbonyl chloride (1.1 g, 2.97 mmol) in dichloromethane (9 ml) was added 3-acetoxymethyl-2,4,6-trimethylaniline (0.6 g, 2.97 mmol) at O°C. Triethylamine f0.46 ml, 3.26 mmol) and 4-dimethyiaminopyridine (36 mg, 0.30 mmol) were added. The mixture was stirred at room temperature overnight, then mixed with water (10 ml). The organic material was separated, and the aqueous layer was extracted with dichloromethane (2x 10 ml). The extracts were combined and washed with water (20 ml) and saturated sodium chloride (20 mll, dried (MgS041, then concentrated. The residue was purified by flash chromatography (SiOz, hexane:
ethyl acetate / 2:1 ) to give N2-(3-acetoxymethyl-2,4,6-trimethylphenyl)-3-[N
(3,4-dimethylisoxazol-5-yl)-N-methoxymethylaminosulfonyl]-2-thio-phenecarboxamide (0.79 g, 50%) as a yellow oil.

B. NZ-(3-Acetoxymethyl-2,4,6-trimethylphenyl)-3-[(3,4-dimethyl-5-isoxazolyl)sulfamoyl]-2-thiophenecarboxamide and NZ-(3-Hydroxymethyl-2,4,6-trimethylphenyl)-3-[(3,4-dimethyl-5-isoxazolyl)sulfamoyl]-2-thio-phenecarboxamide To a solution of N2-(3-acetoxymethyl-2,4,6-trimethylphenyl)-3-[N-(3,4-dimethylisoxazol-5-yl)-N-methoxymethylaminosulfonyl]-2-thiophenecarboxamide (0.78g, 1.46 mmol) in acetic acid (7 ml) and water (3 ml) was added 2N
sulfuric acid (3 drops). The reaction was heated at 80°C for 4 hours, then allowed to cool to room temperature. The mixture was poured into ice water 150 ml), extracted with ethyl acetate (3x50 ml), washed with saturated sodium chloride (50 ml), dried (MgS04), then concentrated. The residue was purified by reverse-phase HPLC f20-80% acetonitrile in water) which gave NZ-(3-acetoxymethyl-2,4,6-trimethylphenyl)-3-[(3,4-dimethyl-5-isoxazolyl)sulfamoyl]-2-thio-phenecarboxamide (0.2g, 28%) as an off-white powder, mp 75-77°C. 'H NMR
(400 MHZ, DMSO-ds):7.85 (d, J = 5.12 Hz, 1 H), 7.34 (d, J = 5.12 Hz, 1 H), 7.00 (s, 1 H1, 5.12 (s, 2H1, 2.30 (s, 3H), 2.20 (s, 3H), 2.17 (s, 3H), 2.07 (s, 3H), 2.02 (s, 3H), 1.65 (s, 3H) ppm. IR (KBr): 3458, 1738, 1646, 1356, 1181 cm-'. And NZ-(3-hydroxymethyl-2,4,6-trimethylphenyll-3-[(3,4-dimethyl-5-isoxazolyl)sulfamoyl]-2-thiophenecarboxamide (45 mg, 6.9%), ratio 4:1 respectively, as a white powder, mp 100-1 15°C. 'H NMR (400 MHZ, DMSO-d6): 7.84 (3, J = 5.12 Hz, 1 H), 7.34 (d, J = 5.16 Hz, 1 H), 6.92 (s, 1 H), 4.48 (s, 2H1, 2.33 (s, 3H), 2.23 (s, 3H), 2.14 (s, 3H), 2.07 (s, 3H), 1.65 (s, 3H) ppm.
IR (KBr): 3439, 1651, 1341, 1 1$1 cm-'.

Formulations of sulfonamide sodium salts A. Formulation of sulfonamide sodium salts for intraveneous administration Phosphate buffer is prepared by adding 3200 mL of sterile water for injection, USP, to a 4 L graduated cylinder. Sodium phosphate dibasic heptahydrate, USP (21 .44 g) is added to the sterile water and the mixture is stirred for 5 minutes or until the solid had dissolved. Sodium phosphate monobasic, USP (11.04 g) is added and the mixture was stirred until the solids had dissolved. The solution was diluted to 4.0 L and stirred. 3000 g of the __..T _____ _._._ ...._.__~.._.. _.__._~~. .______ 77718-35 (S) sodium phosphate buffer is added to an eight liter beaker. Dextrose, USP
(200.0 g) is added, and the mixture is heated to 30-35 °C in a water bath and stirred until a complete solution formed. A sulfonamide sodium salt 1100.0 g! is added with efficient mixing. This mixture is stirred for a minimum of ten minutes or until a solution formed. The solution was removed from the water bath after the sodium salt dissolved. The solution was diluted to 4000 g with sodium phosphate buffer and stirred for five minutes. This solution is sterile filtered using a sterile 0.22 micron pre-size Durapore Millipak 200 filter. The filtered solution is filled into sterile vials and lyophilized under standard conditions. The vials are stoppered. The lyophilized product was then reconstituted with either 9.4 mL or 19.4 mL of water for injection, to give a final concentration of 25 mg/mL or 12.5 mg/mL, respectively.
B. Formulation of sulfonamide sodium salts for oral administration These formulations may be prepared by methods known to those of skill in the art (see, e.g., Ansel Introduction to Pharmaceutical Dosage Forms t4th Edition 1985 (Lea & Febiger!!. In general, the tablets may be prepared by wet or dry granulation of the ingredients, followed by compression. Alternatively, the combined ingredients may be formed into tablets by direct compression. In the preparation of capsules, the combined sulfonamide sodium salt, excipient (diluentl, binder, disintegrating agent and lubricant are filled directly into the capsule shell. The optimal amount of active and inert ingredients in these formulations may be determined empirically by methods known to those of skill in the art. In general, the amount of active ingredient (i.e., sulfonamide sodium salt) will be sufficient to provide a therapeutically-effective dose of the active ingredient. The therapeutically effective dose may be determined empirically by testing the compounds in known in vitro and in vivo systems (see, e'4., U.S.
Patent No. 5,114,918 to Ishikawa et al.; EP A1 O 436 189 to BANYU
PHARMACEUTICAL CO., LTD (October 7, 1991 ); Borges et al. (1989) Eur. J.
Pharm. 165: 223-230; : Filep et al. ( 1991 ) Biochem. Biophvs. Res. Commun.
3Qi 177: 171-176) and then extrapolated therefrom for dosages for humans.

77718-35 (S) -1 zs-Assays for identifying compounds that exhibit endothelia antagonistic andlor agonist activity Compounds that are potential endothelia antagonists are identified by !~ testing their ability to compete with 'Zyl-labeled ET-1 for binding to human ETA
receptors or ETB receptors present on isolated cell membranes. The effectiveness of the test compound as an antagonist or agonist of the biological tissue response of endothelia can also be assessed by measuring the effect on endothelia induced contraction of isolated rat thoracic aortic rings. The ability of the compounds to act as antagonists or agonists for ETB receptors can be assess by testing the ability of the compounds are to inhibit endothelia-1 induced prostacyclin release from cultured bovine aortic endothelial cells.
A. Endothelia binding inhibition - Binding Test # 1: Inhibition of binding to ET" receptors 1!i TE 671 cells (ATCC Accession No. HTB 139) express ETA receptors.
These cells were grown to confluence in T-175 flasks. Cells from multiple flasks were collected by scraping, pooled and centrifuged for 10 min at 190 X g. The cells were resuspended in phosphate buffered saline (PBS) containing 10 mM
TM
EDTA using a Tenbroeck homogenizer. The suspension was centrifuged at 4° C
at 57,800 X g for 15 min, the pellet was resuspended in 5 ml of buffer A (5mM
HEPES buffer, pH 7.4 containing aprotinin (100 KIU/ml)) and then frozen and thawed once. 5 ml of Buffer B (5 mM HEPES Buffer, pH 7.4 containing 10 mM
MnClz and 0.001 % deoxyribonuclease Type 1) was added, the suspension mixed by inversion and then incubated at 37° C for 30 minutes. The mixture 2a was centrifuged at 57,800 X g as described above, the pellet washed twice with buffer A and then resuspended in buffer C (30 mM HEPES buffer, pH 7.4 containing aprotinin (100 KlU/ml) to give a final protein concentration of 2 mg/ml and stored at -70° C until use.
The membrane suspension was diluted with binding buffer (30 mM
HEPES buffer, pH 7.4 containing 150 mM NaCI, 5mM MgCl2, 0.5% Bacitracin) to a concentration of 8 ,ug/50 N1. '251-endothelia-1 (3,000 cpm, 50 mL) was added to 50 NL of either: tA) endothelia-1 (for non specific binding) to give a final concentration 80 nM); (B) binding buffer (for total binding); or (C) a test 77718-35(S) compound (final concentration 1 nM to 100 NM). The membrane suspension (50 uL), containing up to 8 Ng of membrane protein, was added to each of (A), (8), or (C). Mixtures were shaken, and incubated at 4° C for 16-18 hours, and then centrifuged at 4° C for 25 min at 2,500 X g. Alternatively, the incubation was conducted at 24° C, When incubated at 24° C, the ICS°
concentrations are 2- to 10-fold higher than when the incubation is conducted at 4° C.
This, must be kept in mind when comparing ICSO concentrations among compounds provided herein.
The supernatant, containing unbound radioactivity, was decanted and the TM
pellet counted on a Genesys multiwell gamma counter. The degree of inhibition of binding (D) was calculated according to the following equation:
(C) - (A) D = 100 - X 100 (B) - (A) Each test was generally performed in triplicate.
B. Endotheiin binding inhibition - Binding Test ~2: Inhibition of binding to ETB receptors COS7 cells were transfected with DNA encoding the ETB receptor, The resulting cells, which express the human ETB receptor, were grown to confluence in T-150 flasks. Membrane was prepared as described above. The binding assay was performed as described above using the membrane preparation diluted with binding buffer to a concentration of 1 Ng/50 NI.
Briefly, the COS7 cells, described above, that had been transfected with DNA encoding the ETB receptor and express the human ETB receptor on their sur-faces were grown to confluence in T-175 flasks. Cells from multiple flasks were collected by scraping, pooled and centrifuged for 10 min at 190 X g. The cells were resuspended in phosphate buffered saline (PBSI containing 10 mM EDTA
TM
using a Tenbroeck hornogenizer. The suspension was centrifuged at 4° C
57,800 X g for 15 min, the pellet was resuspended in 5 ml of buffer A (5mM HEPES
buffer, pH 7.4 containing aprotinin (100 KIU/ml)) and then frozen and thawed once. Five ml of Buffer B (5 mM HEPES Buffer, pH 7.4 containing 10 mM MnCl2 and 0.001 % deoxyribonuclease Type 1 ) was added, the suspension mixed by inversion and then incubated at 37° C for 30 minutes. The mixture was centrifuged at 57,800 X g as described above, the pellet washed twice with buffer A and then resuspended in buffer C (30 mM HEPES buffer, pH 7.4 con-taining aprotinin (100 KIU/ml) to give a final protein concentration of 2 mg/ml.
The binding assay was performed as described above using the membrane preparation diluted to give 1 ,ug/50 ,ul of binding buffer.
C. Test for activity against endothelin-induced contraction of isolated rat thoracic aortic rings The effectiveness of the test compound as an antagonist or agonist of the biological tissue response of endothelin also is assessed by measuring the effect on endothelin induced contraction of isolated rat thoracic aortic rings (see, e-g., Borges et a!. ( 1989) Eur. J. Pharmacol. 165:223-230) or by measuring the ability to contract the tissue when added alone.
Compounds to be tested are prepared as 100 ,uM stocks. If necessary to effect dissolution, the compounds are first dissolved in a minimum amount of DMSO and diluted with 150 mM NaCI. Because DMSO can cause relaxation of the aortic ring, control solutions containing varying concentrations of DMSO
were tested.
The thoracic portion of the adult rat aorta is excised, the endothelium abraded by gentle rubbing and then cut into 3 mm ring segments. Segments are suspended under a 2 g preload in a 10 ml organ bath filled with Krebs'-Henseleit solution saturated with a gas mixture of 95% OZ and 5% C02 (118 mM NaCI, 4.7 mM KCI, 1.2 mM MgS04, 1 .2 mM KH2P04, 25 mM NaHC03, 2.5 mM CaCIZ, 10 mM D-glucosel.
There is a correlation between activity as an antagonist of endothelin-in-duced thoracic aortic ring contraction and activity as an inhibitor of binding of endothelin to endothelia receptors. The pA2 is a linear function of the log of the ICSO.
D. Assay for identifying compounds that have agonist and/or antagonistic activity against ETB receptors 1. Stimulation of prostacyclin release Since endothelia-1 stimulates the release of prostacyclin from cultured bovine aortic endothelial cells, the compounds that have agonist or antagnoist activity are identified by their ability to inhibit endothelia-1 induced prostacyclin ___~»~.~.-..._ _..___ ____.__-. ... _. _ _.._...._._________....__ 77718-35(S) release from such endothelial cells by measuring 6-keto PGF,Q substantially as described by (Filep et al. (1991) Biochem. BioAhys. Res. Commun. 177 171-176. Bovine aortic cells are obtained from collagenase-treated bovine aorta, seeded into culture plates, grown in Medium 199 supplemented with heat inac-tivated 15°~6 fetal calf serum, and L-glutamine (2 mM), penicillin, streptomycin and fungizone, and subcultured at least four times. The cells are then seeded in six-well plates in the same medium. Eight hours before the assay, after the cells reach confluence, the medium is replaced. The cells are then incubated with a) medium alone, b) medium containing endothelia-1 (10 nM), c) test compound alone, and d) test compound + endothelia-1 (10 nM).
After a 15 min incubation, the medium is removed from each well and the concentrations of 6-keto PGF,o are measured by a direct immunoassay.
Prostacyclin production is calculated as the difference between the amount of keto PGF,Q released by the cells challenged with the endothelia-1 minus the amount released by identically treated unchallenged cells. Compounds that stimulate 6-keto PGF,, release possess agonist activity and those which inhibit endothelia-1 6-keto PGF,o release possess antagonist activity.
2. Inhibition of sarafotoxin 6c induced contraction Sarafotoxin 6c is a specific ET8 antagonist that contracts rat fundal stomach strips. The effectiveness of tests compounds to inhibit this sarafotoxin 6c-induced contraction of rat fundal stomach strips is used as a measure ETa antagonist activity. Two isolated rat fundal stomach strips are suspended under a 1 g load in a 10 ml organ bath filled with Krebs'-Henseleit solution containing 10 NM cyclo(D-Asp-Pro-D-Val-l.eu-D-Trp) (BQ-123; see, U.S. Patent No.
5,i 14,918 to ishikawa et al.), 5 yM indomethacin, and saturated with a gas mixture of 95% 02/5% COZ. Changes in tension are measured isometrically and recorded using a Grass Polygraph coupled to a force transducer. Sarafotoxin 6c is added cumulatively to one strip while the second strip is preincubated for min with a test compound prior to addition of cumulative doses of sarafotoxin 6c. The effects of the test compounds on the concentration-response curve for sarafotoxin 6c are examined.

77718-35 (S) E. Deoxycorticosterone acetate (DOCA)-salt hypertensive rat model for assessing in vivo activity of selected compounds Selected compounds disclosed herein have been tested for activity in the deoxycorticosterone acetate (DOCA)-salt hypertensive rat model. To perform TM
these tests, silastic MDX4-4210 elastomer implants containing 47 mg (DOCA) were prepared according to the method of Ornmsbee et al. ((1973) the J. Pharm.
Sci. 62:255-257). Briefly, DOCA is incorporated into silicon rubber implants for sustained release. To prepare the implants the DOCA is incorporated into unpolymerized silicone rubber, catalyst is added and the mixture is cast in a hemicylindrical shape.
TM
Sprague Dawley rats l7-8 weeks old) were unilaterally nephrectomized under ketamine anesthesia and a DOCA-implant was placed on the left lateral dorsal abdomen of the animal. The rats were allowed to recover for three weeks. During recovery they were permitted free access to normal rat chow and 0.9% NaCI drinking solution in place of drinking water. The rats develop hypertension within 3 weeks.
All animals were used in the tests between 21 and 30 days post surgery.
The mean arterial blood presure in these animals ranged from 165-200 mm Hg.
On the day of experimentation, catheters were inserted under brevital anesthesia into the right femoral artery for measurement of blood pressure, and into the right femoral vein for administration of a selected compound. The animals were placed in a restrainer and allowed to recover for a minimum of 60 min or until a steady mean arterial blood pressure was recorded. At that time, the selected compound or control vehicle was administered either intravenously, as a 60 minute infusion, or orally by oral gavage. Blood pressure was recorded continuously for a fruther 10 hrs.
F. Effect of Intravenous administration on ET-1-induced pressor responses in conscious, autonomically blocked rats;
a model for assessing in vivo activity of selected compounds TM TM
Male Sprague Dawley rats (250-450 g) were anesthetized (Brevital 50 mg/kg, IP) and cannulae were placed in the femoral artery to measure mean arterial pressure (MAPI and in the femoral vein for intravenous drug administration. Animals were placed in a restrainer and allowed to regain consciousness. Thirty minutes later autonomic blockade was administered (atropine methyl nitrate, 3 mg/kg, IV, followed by propranalol, 2 mg/kg, IV1.
An haur later animals received a bolus injection of vehicle (0.5 m1) followed thirty minutes later by intravenous bolus administration of ET-1 (Control, 1 Ng/kg).
Following recovery from this challenge, test -compounds were administered by intravenous bolus administration (0.5 ml) and then re-challenged with ET-1 thirty minutes later. Results are expressed as the percent inhibition of the ET-1-induced pressor response after administration of the test compound compared to the pressor response induced by the control ET-1 challenge. In some cases a third ET-1 challenge was administered ninety minutes after administration of the test compound.
G. Results 1. In vitro The ICSO for each of the compounds of the preceding Examples for ETA
and ETB receptors has been measured. Almost all of the compounds have an ICso of less than 10 ~M for either or both of the ETA and ETB receptors. Many of the compounds have an ICSO less than about 10 ~M, others have an ICSO less than about 1 NM and some of the compounds have an ICSO less than about 0.1 NM. A number of the compounds have an ICSO for ETA receptors that is substantially less (10 to 100-fold or more) than for ETB receptors, and, thus are selective for ETA receptors. Others of the compounds are ETB selective.
2. In vivo Selected compounds, such as N-(4-chloro-3-methyl-5-isoxazolyll-2-(3-hydroxy-2,4,6-trimethylphenylaminocarbonyllthiophene-3-sulfon-amide, have been tested in the hypertensive rat model, and were effective in decreasing blood pressure.
Since modifications will be apparent to those of skill in this art, it is intended that this invention be limited only by the scope of the appended claims.

Claims (36)

CLAIMS:

1. A sulfonamide compound or a pharmaceutically acceptable salt or acid thereof, wherein the compound has formula (IV):

wherein:
Ar1 has formula wherein R A and R B are each independently selected from among lower alkyl, lower alkenyl, lower alkynyl, lower haloalkyl, halide, pseudohalide and H, with the proviso that (i) R B is not halide; and (ii) Ar1 is not 4-chloro-3-methyl-5-isoxazolyl, 4-chloro-5-methyl-3-isoxazolyl or 3,4-dimethyl-5-isoxazolyl.

2. A sulfonamide compound of claim 1, or a pharmaceutically acceptable salt or acid thereof, that is a thiophene-3-sulfonamide.

3. A sulfonamide compound or a pharmaceutically acceptable salt or acid thereof, wherein the compound has formula (V):
wherein:

Ar1 has formula:
wherein R A and R B are each independently selected from among lower alkyl, lower alkenyl, lower alkynyl, lower haloalkyl, halide, pseudohalide and H, with the proviso that R B is not halide;
W is -NH-; and R20 is selected from the group consisting of OH, CN, C (O) R16, CO2R16, -(CH2) x OH, OR16 and CONR12R16;
R16 is hydrogen or C1-C12-alkyl;
R12 is hydrogen;
and x is 0 to 3.

4. A sulfonamide compound of claim 3, or a pharmaceutically acceptable salt or acid thereof, that is a thiophene-3-sulfonamide.

5. A sulfonamide compound of claim 3, or a pharmaceutically acceptable salt or acid thereof, wherein:
Ar1 is 4-chloro-3-methyl-5-isoxazolyl;
W is -NH-; and R20 is CONH2 or COOH.

6. A sulfonamide compound of claim 1 that is a pharmaceutically acceptable sodium salt.

7. A pharmaceutical composition, comprising an effective amount of a sulfonamide compound of any one of claims 1 to 5 or a pharmaceutically acceptable salt or acid thereof, and a pharmaceutically acceptable carrier, wherein the amount is effective for ameliorating the symptoms of an endothelin-mediated disease.

8. The composition of claim 7 that is formulated for single or multiple dosage administration.

9. An article of manufacture, comprising packaging material and a sulfonamide compound of any one of claims 1 to 6, or a pharmaceutically acceptable salt or acid thereof contained within the packaging material, wherein the compound is effective for antagonizing the effects of endothelin, ameliorating the symptoms of an endothelin-mediated disorder, or inhibiting the binding of an endothelin peptide to an ET receptor with an IC50 of less than 10 µM, and the packaging material includes a label that indicates that the sulfonamide or salt thereof is used for antagonizing the effects of endothelin, inhibiting the binding of endothelin to an endothelin receptor or treating an endothelin-mediated disorder.

10. A use of the composition of claim 7 for the amelioration of one or more symptoms of an endothelin-mediated disease.

11. The use of claim 10, wherein the disease is selected from the group consisting of hypertension, cardiovascular disease, asthma, pulmonary hypertension, inflammatory diseases, opthalmologic disease, menstrual disorders, obstetric conditions, wounds, gastroenteric disease, renal failure, immunosuppressant-mediated renal vasoconstriction, erythropoietin-mediated vasoconstriction endotoxin shock, anaphylactic shock, and hemorrhagic shock.

12. The use of claim 11, wherein the disease is selected from the group consisting of asthma and inflammatory diseases.

13. An in vitro use of a sulfonamide compound of any one of claims 1 to 6, or a pharmaceutically acceptable salt or acid thereof, for inhibiting the binding of an endothelin peptide to endothelin A (ET A) or endothelin B (ET B) receptors, comprising contacting the receptors with an endothelin peptide and with a sulfonamide compound or a pharmaceutically acceptable salt or acid thereof, of any one of claims 1 to 6, wherein:
the contacting of the receptors with the compound, salt or acid is effected prior to, simultaneously with or subsequent to contacting the receptors with the endothelin peptide.

14. An in vitro use of a sulfonamide compound according to any one of claims 1 to 6, or a pharmaceutically acceptable salt or acid thereof, for altering endothelin-mediated activity, comprising contacting endothelin receptors with the sulfonamide compound or a pharmaceutically acceptable salt or acid thereof.

15. A pharmaceutical composition of claim 7, that comprises a sodium phosphate buffer solution comprising a sugar and a sulfonamide compound of any one of claims 1 to 6 dissolved therein.

16. A pharmaceutical composition of claim 15, wherein the sulfonamide compound is a sodium salt.

17. A lyophilized powder of a salt of a sulfonamide compound of any one of claims 1 to 6.

18. The lyophilized powder of claim 17 produced by a process, comprising:
(a) dissolving a pharmaceutically-acceptable salt of the sulfonamide compound in a sodium phosphate buffer solution containing a sugar or carbohydrate to form a solution;
(b) sterile-filtering the resulting solution; and (c) lyophilizing the filtered solution under standard conditions to produce a sterile powder.

19. The powder of claim 18, wherein the sugar or carbohydrate contains dextrose.

20. An article of manufacture, comprising packaging material and a powder of any one of claims 17 or 19, contained within the packaging material, wherein the compound is effective for antagonizing the effects of endothelin, ameliorating the symptoms of an endothelin-mediated disorder or inhibiting the binding of an endothelin peptide to an ET receptor with an IC50 of less than 1 µM, and the packaging material includes a label that indicates that the sulfonamide or salt thereof is used for antagonizing the effects of endothelin, inhibiting the binding of endothelin to an endothelin receptor or treating an endothelin-mediated disorder.

21. A system comprising: a sterile vial containing the lyophilized powder of claim 17, 18 or 19.

22. A system of claim 21, wherein the sterile vial contains an amount of the powder that is for a single dose administration.

23. A system of claim 21, wherein the sterile vial also contains an amount of sterile water into which the powder dissolves for injection; and the final concentration of the dissolved lypholized powder that is for single dose administration is between 1 and 250 mg/mL.

24. The pharmaceutical composition of claim 7 that is formulated as a tablet or capsule.

25. The composition of claim 7 or 24, further comprising an enteric coating.

26. The composition of claim 25, wherein the coating is selected from cellulose acetate phthalate, polyethylene glycol, polyoxyethylene sorbitan, castor oil, ethyl cellulose pseudolatex, phenyl salicylate, n-butyl stearate, stearic acid, and carnuba wax.

27. Use of a sulfonamide compound of any one of claims 1 to 6 or a pharmaceutically acceptable salt or acid thereof, in formulation of a medicament for treatment of an endothelin-mediated disorder.

28. Use of a sulfonamide compound of any one of claims 1 to 6 or a pharmaceutically acceptable salt or acid thereof for treatment of an endothelin mediated disorder.

29. The sulfonamide compound N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,4-dimethyl-6-aminocarbonylphenylaminocarbonyl)-thiophene-3-sulfonamide or a pharmaceutically acceptable salt or acid thereof.

30. The sulfonamide compound 3-(4-chloro-3-methyl-5-isoxazolyl) sulfamoyl-N2-(2-carboxyl-4,6-dimethyl)phenyl-2-thiophenecarboxamide or a pharmaceutically acceptable salt or acid thereof.

31. The sulfonamide compound 3-(4-chloro-3-methyl-5-isoxazolyl) sulfamoyl-N2-(2-phenyl-4,6-dimethyl)phenyl-2-thiophenecarboxamide or a pharmaceutically acceptable salt or acid thereof.

32. The sulfonamide compound N-(4-chloro-3-methyl-5-isoxazolyl)-2-(2,4,6-trimethylphenylaminocarbonyl)thiophene-3-sulfonamide or a pharmaceutically acceptable salt or acid thereof.

33. A use of a sulfonamide compound of any one of claims 1-6 and 29-31 for treatment or prophylaxis of an endothelin-mediated disease in a mammal.

34. A use of a sulfonamide compound according to any one of claims 1 to 6 and 29 to 31 in manufacture of a medicament for treatment or prophylaxis of an endothelin-mediated disease.

35. A use of a composition according to any one of claims 7, 8, 15, 16, 24, 25 and 26 for treatment or prophylaxis of an endothelin-mediated disease in a mammal.

36. A use of a powder according to any one of claims 17 to 19 for treatment or prophylaxis of an endothelin-mediated disease in a mammal.