Asymmetric Synthesis of Functionalized Dihydronaphthoquinones Containing Quaternary Carbon Centers via a Metal-Free Catalytic Intramolecular Acylcyanation of Activated Alkenes
作者:Zhe Zhuang、Zhi-Peng Hu、Wei-Wei Liao
DOI:10.1021/ol501427h
日期:2014.6.20
metal-free catalytic annulation was developed through a Lewis base-catalyzed asymmetric allylic alkylation and the ensuing unprecedented asymmetric intramolecular acylcyanation of alkenes. This protocol provides a unique and facile access to prepare enantioenriched densely functionalized dihydronaphthoquinones accompanied by enantiomerically pure 3,3-disubstituted phthalides bearing quaternary carbon centers
通过路易斯碱催化的不对称烯丙基烷基化反应以及随之而来的前所未有的烯烃不对称分子内酰基氰化反应,开发了一种新型的无金属催化环化反应。该方案为制备对映体富集的稠密官能化二氢萘醌以及对映体纯的带有季碳中心的3,3-二取代的邻苯二酚提供了独特而便捷的途径。