Total Synthesis of Leucascandrolide A: A New Application of the Mukaiyama Aldol−Prins Reaction
作者:Lori J. Van Orden、Brian D. Patterson、Scott D. Rychnovsky
DOI:10.1021/jo070901r
日期:2007.7.1
A total synthesis of the marine natural product leucascandrolide A has been completed. The titanium tetrabromide-mediated Mukaiyama aldol−Prins (MAP) reaction with aldehydes developed in our group provided a highly convergent and stereoselective method for assembling the core of the molecule. A new class of MAP reactions with acetals is introduced, and mechanistic considerations for both MAP methods
海洋天然产物白藜芦醇酯A的全合成已经完成。在我们小组中开发的四溴化钛介导的Mukaiyama aldol-Prins(MAP)与醛的反应为组装分子的核提供了一种高度收敛和立体选择性的方法。介绍了一类新的与乙缩醛的MAP反应,并描述了两种MAP方法的机理考虑因素。通过两个途径使侧链偶联来完成总合成:已知的Still-Gennari烯化反应和新的Z选择性Aldol /脱氢硒化反应。两种方法都是高度选择性的,并提供了天然产物。