申请人:Texas Biotechnology Corporation
公开号:US05571821A1
公开(公告)日:1996-11-05
Sulfonamides 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 effective amounts of one or more of these sulfonamides or prodrugs thereof that inhibit or increase the activity of endothelin are also provided. The sulfonamides have formula I: ##STR1## in which Ar.sup.1 is a 3- or 5-isoxazolyl and Ar.sup.2 is selected from among alkyl, including straight and branched chains, aromatic rings, fused aromatic rings and heterocyclic rings, including 5-membered heterocycles with one, two or more heteroatoms and fused ring analogs thereof and 6-membered rings with one, two or more heteroatoms and fused ring analogs thereof. Ar.sup.2 is preferably thiophenyl, furyl, pyrrolyl, naphthyl, and phenyl. Compounds in which Ar.sup.1 is a 4-halo-substituted isoxazole are more active than the corresponding alkyl-substituted compound and compounds in which Ar.sup.1 is substituted at this position with a higher alkyl tend to exhibit greater affinity for ET.sub.B receptors than the corresponding lower alkyl-substituted compound.
磺胺类药物及使用这些磺胺类药物抑制内皮素肽与内皮素受体结合的方法是通过将磺胺类药物与受体接触来实现的。还提供了通过给予有效剂量的这些磺胺类药物或其前药来治疗内皮素介导的疾病的方法,这些药物能够抑制或增加内皮素的活性。这些磺胺类药物的化学式为I:##STR1## 其中Ar.sup.1是3-或5-异噁唑基,Ar.sup.2从烷基(包括直链和支链)、芳香环、融合芳香环和杂环中选择,包括含有一个、两个或更多杂原子的5元杂环及其融合环类似物,以及含有一个、两个或更多杂原子的6元环及其融合环类似物。Ar.sup.2最好是噻吩基、呋喃基、吡咯基、萘基和苯基。Ar.sup.1为4-卤代异噁唑基的化合物比相应的烷基取代化合物更活跃,而Ar.sup.1在这个位置被更高烷基取代的化合物倾向于表现出对ET.sub.B受体更大的亲和力,而不是相应的较低烷基取代的化合物。