Ring-closing metathesis for the synthesis of side chain knotted pentapeptides inspired by vancomycin
作者:Hefziba T. ten Brink、Dirk T. S. Rijkers、Johan Kemmink、Hans W. Hilbers、Rob M. J. Liskamp
DOI:10.1039/b408820d
日期:——
A versatile method for the synthesis of bicyclic side chain knotted peptides inspired by vancomycin is described. The synthetic approach is based on the incorporation of a central amino acid derivative 3 having two allylic groups—introduced by a Stille coupling—into pentapeptide 8 containing two allylated serine residues. Treatment of this bis-ring-closing metathesis precursor with 2nd generation Grubbs catalyst results in the formation of a bicyclic pentapeptide with the correct side chain to side chain connectivity pattern as observed in vancomycin: i
− 2 →
i, i
→
i
+ 2. Modelling studies using MacroModel hint at a cavity-like structure of the bicyclic pentapeptide which may bind suitable ligands.
描述了一种受万古霉素启发的合成双环侧链打结肽的通用方法。该合成方法基于将具有两个烯丙基基团的中心氨基酸衍生物3(通过Stille偶联引入)并入含有两个烯丙基化丝氨酸残基的五肽8中。用第二代格鲁布斯催化剂处理这种双环闭复分解前体会形成双环五肽,其具有正确的侧链到侧链连接模式,如万古霉素中所观察到的:i
− 2 →
我,我
→
我
+ 2. 使用MacroModel 进行的建模研究暗示了双环五肽的空腔样结构,它可以结合合适的配体。