Synthesis of novel modified dipeptide inhibitors of human collagenase: .beta.-mercapto carboxylic acid derivatives
作者:Belle Beszant、John Bird、Laramie M. Gaster、Gregory P. Harper、Ian Hughes、Eric H. Karran、Roger E. Markwell、Anette J. Miles-Williams、Stephen A. Smith
DOI:10.1021/jm00077a006
日期:1993.12
diastereoisomer was 56d (IC50 12 nM) with the R,R,S configuration. It appeared that the orientation of the P1' and the thiol-bearing centers to each other is a more critical influence on potency than any absolute stereochemical requirements. It is suggested that the high potency of the beta-mercapto carboxylic acid derivatives may be a consequence of bidentate coordination of the thiol and carbonyl
描述了一系列人胶原酶的含巯基的修饰二肽抑制剂(8)的合成,这些抑制剂在推定的P1位(巯基的β位)掺入了多种羧酸衍生物。在体外评估了这些化合物通过纯化的人肺成纤维细胞胶原酶抑制大鼠皮肤1型胶原降解的能力,并描述了结构-活性关系研究。通过在P1位置掺入甲基(化合物43a,56a和57ab)或苄基酯(44a),可获得最佳效价(纳摩尔范围内的IC50值)。也可以容纳小的酰胺(例如伯酰胺47a),但通常,增加P1酰胺取代基的大小会降低效能。发现PheNHMe,TrpNHMe和Tyr(Me)NHMe取代基是大约等价的P2'残基。用P2'位置的(S)-TrpNHMe测试该化合物的所有四个非对映异构体56a-d的结果表明,S,S,S非对映异构体56a具有最高效价(IC50 2.5 nM),第二强的非对映异构体是具有R,R,S配置的56d(IC50 12 nM)。似乎P1'和带有硫醇的中心彼此之间的方向比任