Difluoromethylene Phosphabetaine as an Equivalent of Difluoromethyl Carbanion
作者:Vitalij V. Levin、Alexey L. Trifonov、Artem A. Zemtsov、Marina I. Struchkova、Dmitry E. Arkhipov、Alexander D. Dilman
DOI:10.1021/ol503225s
日期:2014.12.5
A method for nucleophilic difluoromethylation of reactive Michael acceptors, aldehydes, and azomethines is described. The reaction is performed using the readily available and air-stable reagent difluoromethylene phosphabetaine. The process involves interaction of an electrophilic substrate with in situ generated difluorinated phosphonium ylide followed by hydrolysis of the carbon-phosphorus bond under mild conditions.