Two remarkable epimerizations imperative for the success of an asymmetric total synthesis of (+)-aigialospirol
作者:Ruth Figueroa、John B. Feltenberger、Christle C. Guevarra、Richard P. Hsung
DOI:10.1007/s11426-010-4176-8
日期:2011.1
Two remarkable epimerization processes were uncovered during our pursuit of an enantioselective synthesis of (+)-aigialospirol featuring a cyclic acetal tethered ring-closing metathesis. Through modeling, we were able to turn these two unexpected epimerizations to our advantage via modeling to ensure a successful and concise total synthesis, thereby firmly establishing cyclic acetal tethered RCM as a powerful strategy in natural product synthesis. Most importantly, calculations allowed us to fully understand the nature and the mechanistic course of these two epimerizations that were imperative to the total synthesis efforts.
在探索以环缩醛连接的环化复分解反应为特征的对映选择性合成(+)-aigialospirol的过程中,我们发现了两种非凡的消旋化反应。通过建模,我们能够利用这两种意想不到的消旋化反应,确保成功而简洁的全合成,从而将环缩醛连接的RCM牢固确立为天然产物合成中的有力策略。最重要的是,计算使我们能够充分理解这两种消旋化反应的本质和机理,这对全合成工作至关重要。