作者:John C. Danilewicz、Stuart M. Abel、Alan D. Brown、Paul V. Fish、Edward Hawkeswood、Stephen J. Holland、Keith James、Andrew B. McElroy、John Overington、Michael J. Powling、David J. Rance
DOI:10.1021/jm011133d
日期:2002.6.1
intravenously to rats and showed poor activity when given intraduodenally. The aim was then to reduce lipophilicity below a log D of -1.2, which in a previously reported series had been effective in preventing rapid clearance. It was anticipated that compounds of this type would rely on the cation selective paracellular route of absorption from the gastrointestinal tract. Potent polar analogues with
基于(R)-Phe-Pro-Arg序列寻找凝血酶的有效和选择性抑制剂。目的是产生与有效的阿加曲班类型竞争性抑制剂所实现的结合相互作用相似的结合相互作用,从而消除醛和硼酸类型抑制剂所利用的与催化丝氨酸功能的共价相互作用。通过用4-烷氧基苯甲m残基取代精氨酸来改善S(1)子位点相互作用,可提供有效的铅2(K(i)= 0.37 nM)。尽管失去了与活性位H键结合的酰胺键,但模型表明在烷氧基氧原子和催化的Ser-195羟基之间产生了新的H键。然后用1-ami基哌啶取代苯甲idine体系,得到化合物4,其选择性比胰蛋白酶进一步提高。然而,先前的研究表明,这些化合物可能亲脂性太强(分别为Log D +0.4和+0.2),并且可能会通过胆道清除而迅速进行肝提取。因此,当对大鼠静脉内给药时,两者均显示出短效作用,而经十二指肠内给药时,两者均显示出较差的活性。然后的目的是将亲脂性降低至-1.2的log D以