Studies on Nonpeptide Angiotensin II Receptor Antagonists. IV. Synthesis and Biological Evaluation of 4-Acrylamide-1H-imidazole Derivatives.
作者:Toshio OKAZAKI、Toshihiro WATANABE、Kazumi KIKUCHI、Akira SUGA、Masayuki SHIBASAKI、Akira FUJIMORI、Osamu INAGAKI、Isao YANAGISAWA
DOI:10.1248/cpb.46.973
日期:——
zol-5- yl)biphenyl-4-yl]methyl]-1H-imidazole-5-carboxylic acid (1), which was superior to EXP3174 in vitro. Since 1 showed only poor activity against angiotensin II-induced pressor response in rats after oral administration, the carboxylic acid function of 1 was converted into prodrug esters (13). Among these, the 1-[(ethoxycarbonyl)oxy]ethyl ester (13a) showed the most potent and longest-lasting activity
合成了一系列新的在咪唑环的4位上含有丙烯酰胺基团的非肽血管紧张素II拮抗剂,并通过功能测定在兔主动脉中检测了它们的拮抗活性。选择丙烯酰胺基团作为EXP3174氯基团的大亲脂性替代物。丙烯酰胺部分的结构活性关系研究表明,在4位上被N-甲基-3,3-二甲基丙烯酰胺基团取代可得到最佳化合物2-丁基-4-[(3,3-二甲基丙烯酰基) )甲基-氨基] -1-[[2'-(1H-四唑-5-基)联苯-4-基]甲基] -1H-咪唑-5-羧酸(1),其在EXP3174方面优于体外。由于1口服后大鼠对血管紧张素II引起的升压反应仅表现出较弱的活性,1的羧酸官能团转化为前药酯(13)。其中,当将1-[(乙氧基羰基)氧基]乙基酯(13a)口服给予大鼠时,其作用最强,持续时间最长。当对有意识的呋塞米治疗的狗口服给药时,与DuP 753相比,13a的降血压活性提高了约3倍。这些数据表明13a可能是治疗血管紧张素II依赖性疾病(例如高血压)的有用药物。