Depsipeptide synthesis using a late-stage Ag(<scp>i</scp>)-promoted macrolactonisation of peptide thioamides
作者:Sadegh Shabani、Craig A. Hutton
DOI:10.1039/d0cc07747j
日期:——
often challenging due to the low nucleophilicity of hydroxyl groups, epimerisation, cyclodimerisation, and potential acyl transfer reactions of the ester. Herein, we report a novel macrolactonisation strategy employing a Ag(I)-promoted conversion of peptide thioamides to isoimide intermediates, which undergo site-selective intramolecular acyl transfer to serine/threonine side chains to generate the macrolactone
由于羟基的低亲核性,差向异构化,环二聚化和酯的潜在酰基转移反应,使肽大环内酯化以生成环状二肽通常是具有挑战性的。在本文中,我们报道了一种新型的大内酯化策略,该策略采用了由Ag(I)促进的肽硫代酰胺向异酰亚胺中间体的转化,该中间体经过位点选择性分子内酰基转移到丝氨酸/苏氨酸侧链以生成大内酯。