Development of a novel class of cyclic hexapeptide oxytocin antagonists based on a natural product
作者:Peter D. Williams、Mark G. Bock、Roger D. Tung、Victor M. Garsky、Debra S. Perlow、Jill M. Erb、G. F. Lundell、Norman P. Gould、Willie L. Whitter
DOI:10.1021/jm00099a019
日期:1992.10
optimal combination of cyclic amino acid ring sizes at positions 1, 4, and 5 and the role of the N-alkyl substituent at position 6 was elucidated. The lipophilic amino acids at positions 2 and 3 and the unusual amino acid D-dehydropiperazic acid at position 4 were found to be the most critical residues for obtaining good oxytocin receptor affinity. Analogs containing a basic side chain at the less critical
源自链霉菌的环状六肽催产素拮抗剂的新结构类别,以L-365,209为代表(环-[L-脯氨酰基1-D-苯丙氨酰基2-L-异亮氨酰基3-D-脱氢哌嗪基4-L-脱氢过唑基5-D-(N-甲基)最近报道了苯丙氨酰6]。在本文中,我们通过系统研究通过全合成获得的L-365,209类似物,进一步描述了这一新类的结构活性图谱。阐明了位置1、4和5的环状氨基酸环大小的最佳组合以及位置6的N-烷基取代基的作用。发现在2和3位的亲脂氨基酸和在4位的不寻常氨基酸D-脱氢哌嗪酸是获得良好催产素受体亲和力的最关键的残基。在不太关键的5位和6位上含有基本侧链的类似物保持良好的受体亲和力,并且对于静脉内制剂也具有有用的水溶性水平。通过结合增强效力和溶解性的取代,鉴定了几种在体外具有所需性质组合的类似物(22,环-[L-脯氨酰基-D-色氨酸-L-异亮氨酰基-D-哌啶基-L-pipeco lyl- D-组氨酸]; 25,环-