Carbon-Selective Difluoromethylation of Soft Carbon Nucleophiles with Difluoromethylated Sulfonium Ylide
作者:Jiansheng Zhu、Hanliang Zheng、Xiao-Song Xue、Yisa Xiao、Yafei Liu、Qilong Shen
DOI:10.1002/cjoc.201800383
日期:2018.11
highly carbon‐selective difluoromethylation of soft carbon nucleophiles including β‐ketoesters, malonates, oxindoles, benzofuranones and ketene silyl acetals with a difluoromethylated sulfonium ylide under mild conditions was described. Mechanistic studies suggest that these difluoromethylating reactions proceed via a difluorocarbene pathway.
描述了在温和条件下用二氟甲基化叶立德对软碳亲核试剂(包括β-酮酸酯,丙二酸酯,羟吲哚,苯并呋喃酮和乙烯酮甲硅烷基乙缩醛)进行高碳选择性二氟甲基化。机理研究表明,这些二氟甲基化反应是通过二氟卡宾途径进行的。