Nonpeptide angiotensin II receptor antagonists. 2. Design, synthesis, and structure-activity relationships of 2-alkyl-4-(1H-pyrrol-l-yl)-1H-imidazole derivatives: profile of 2-propyl-1-[[2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl]-methyl]-4-[2-(trifluoroacetyl)-1H-pyrrol-1-yl]-1H-imidazole-5-carboxylic acid (CI-996)
作者:Ila Sircar、John C. Hodges、John Quin、Amy M. Bunker、R. Thomas Winters、Jeremy J. Edmunds、Catherine R. Kostlan、Cleo Connolly、Stephen J. Kesten
DOI:10.1021/jm00068a002
日期:1993.8
A novel series of nonpeptide angiotensin II (AII) receptor antagonists containing a 1H-pyrrol-1-yl moiety at the 4-position of the imidazole have been developed. The pyrrole group occupies the same lipophilic pocket at the receptor as the chloro group in DuP 753 (68) and EXP 3174 (69) and the pentafluoro group in DuP 532 (70), respectively. The impetus for its selection came from bioisosteric considerations
已经开发了一系列新颖的在咪唑的4-位上含有1H-吡咯-1-基部分的非肽血管紧张素II(AII)受体拮抗剂。吡咯基团在受体处与DuP 753(68)和EXP 3174(69)中的氯基和DuP 532(70)中的五氟基团在相同的亲脂性口袋处占据相同的位置。其选择的动力来自基于疏水性和电子取代基常数的生物立体考虑。对结构-活性关系的广泛研究揭示了几种高效的AII受体拮抗剂。在吡咯环的2-位上的酰基取代改善了活性,最明显的是在体内大鼠模型中。此外,2-取代的吡咯化合物改善了对与未取代的吡咯类似物相关的极其容易的脱羧反应的化学稳定性,从而促进了这些试剂的开发。18、20和42(<1 nM)的IC50分别优于参考化合物69和70。这些化合物是选择性的AII拮抗剂,它们在AT1受体上竞争并且在浓度高达10 microM时对AT2受体没有亲和力。在血压正常的大鼠模型中静脉内给药时,化合物18抑制AII诱导