New Non-Peptide Endothelin-A Receptor Antagonists: Synthesis, Biological Properties, and Structure−Activity Relationships of 5-(Dimethylamino)-<i>N</i>-pyridyl-, -<i>N</i>-pyrimidinyl-, -<i>N</i>-pyridazinyl-, and -<i>N</i>-pyrazinyl-1-naphthalenesulfonamides
作者:Robert H. Bradbury、Colin Bath、Roger J. Butlin、Michael Dennis、Christine Heys、Sarah J. Hunt、Roger James、Andrew A. Mortlock、Neil F. Sumner、Eric K. Tang、Berwick Telford、Elaine Whiting、Campbell Wilson
DOI:10.1021/jm9604585
日期:1997.3.1
led to the discovery of several 6-membered nitrogen heterocycles as replacements for the N-isoxazolyl substituent present in the 1-naphthalenesulfonamides endothelin-A (ETA) antagonist 5-(dimethylamino)-N-(3,4-dimethyl-5-isoxazolyl)-1-naphthalenesu lfo namides (BMS 182874). In each of these heterocycles, a small substituent such as halogen para to the position of attachment to the sulfonamide nitrogen
自动合成的使用导致发现了几个6元氮杂环取代了1-萘磺酰胺类内皮素A(ETA)拮抗剂5-(二甲基氨基)-N-(3,4-二甲基)中存在的N-异恶唑基取代基-5-异恶唑基)-1-萘酰胺(BMS 182874)。在这些杂环的每一个中,发现小的取代基,例如在与磺酰胺氮原子的连接位置对位的卤素,对ETA受体亲和力是有利的。在这些杂环中,2-吡嗪提供了最大的改善受体亲和力的范围。在吡嗪环的3-和5-位上的取代基的优化导致有效的,ETA-选择性化合物,例如5-(二甲基氨基)-N-(5-氯-3-甲氧基-2-吡嗪基)-1-萘磺酰胺(7m,ETA pIC50 8.1)。当以10 mg / kg的剂量口服给清醒者时,