Studies on Nonpeptide Angiotensin II Receptor Antagonists. III. Synthesis and Biological Evaluation of 5-Alkylidene-3,5-dihydro-4H-imidazol-4-one Derivatives.
作者:Toshio OKAZAKI、Kazumi KIKUCHI、Toshihiro WATANABE、Akira SUGA、Masayuki SHIBASAKI、Akira FUJIMORI、Osamu INAGAKI、Isao YANAGISAWA
DOI:10.1248/cpb.46.777
日期:——
5-Alkylidene-3,5-dihydro-4H-imidazol-4-one derivatives were synthesized and evaluated for activity as angiotensin II receptor antagonists. Substitutions at C-2 and C-5, respectively, with a propyl group and a 1-methylethylidene group resulted in the optimal compound, 3,5-dihydro-5-(1-methylethylidene)-2-propyl-3-[[2'-(1H-tetrazol - 5-yl)biphenyl-4-yl]methyl]-4H-imidazol-4-one (2b), with a pA2 value
合成了5-亚烷基-3,5-二氢-4H-咪唑-4-酮衍生物,并评价了其作为血管紧张素II受体拮抗剂的活性。在C-2和C-5处分别用丙基和1-甲基亚乙基取代可以得到最佳化合物3,5-二氢-5-(1-甲基亚乙基)-2-丙基-3-[[ 2'-(1H-四唑-5-基)联苯-4-基]甲基] -4H-咪唑-4-酮(2b),在兔主动脉中的pA2值为8.85。当对大鼠口服给药时,2b对血管紧张素II诱导的升压反应的抑制作用要比DuP 753大。当对有意识的贫钠自发性高血压大鼠口服给药时,化合物2b也显示出良好的降压作用,作用持续时间为24 H。