作者:Gangavaram V. M. Sharma、Sheri Venkata Reddy
DOI:10.1039/c3ra44227f
日期:——
Carolacton, a secondary metabolite, was isolated from the myxobacterium Sorangium cellulosum. It exhibits excellent antibacterial activity at nanomolar concentrations. We report the synthesis of the macrocyclic core of carolacton, comprising the C7âC19 fragment with five out of the eight stereocentres. The key reactions involved are: Sharpless asymmetric epoxidation, metal chelated epoxide opening, Yamaguchi esterification and ring closing metathesis (RCM). The present study utilizes a simple synthetic strategy, adopting asymmetric and chiron approaches.
从粘细菌属纤维状粘细菌中分离出一种次生代谢产物——卡罗内酯。它在纳摩尔浓度下表现出优异的抗菌活性。我们报道了卡罗内酯大环核心的合成,包括C7-C19片段和八个立体中心中的五个。涉及的关键反应包括:Sharpless不对称环氧化、金属螯合环氧化物的开环、山口酯化和环闭合复分解(RCM)。本研究采用一种简单的合成策略,即不对称和手性方法。