作者:Kevin Blades、Jonathan M. Percy
DOI:10.1016/s0040-4039(98)02000-0
日期:1998.12
Cerium-mediated conjugate additions of (diethoxyphosphinoyl) difluoromethyllithium to cyclic vinyl sulfoxides proceeded smoothly; thermal sulfoxide elimination afforded the products of formal vinylation, attaching the difluoromethylenephosphonato group to an alkenyl carbon atom. With acyclic vinyl sulfoxides, the addition occurred in moderate to poor yield. Addition failed completely in the absence
铈介导的(二乙氧基膦酰基)二氟甲基锂与环状乙烯基亚砜的共轭加成反应顺利进行。热亚砜的消除提供了正式的乙烯基化产物,将二氟亚甲基膦酸酯基团连接到烯基碳原子上。对于无环乙烯基亚砜,添加的产率中等至较差。在没有氯化铈(III)的情况下添加完全失败,并且通过过量的试剂来促进添加。