A New Method for Aromatic Difluoromethylation: Copper-Catalyzed Cross-Coupling and Decarboxylation Sequence from Aryl Iodides
摘要:
A new methodology for aromatic difluoromethylation is described. Aryl iodides reacted with alpha-silyldifluoroacetates upon treatment with copper catalyst in DMSO or DME to give the corresponding aryldifluoroacetates in moderate to good yields. The subsequent hydrolysis of aryldifluoroacetates and KF-promoted decarboxylation afforded a variety of difluoromethyl aromatics.
METHOD FOR PRODUCING AROMATIC DIFLUOROACETIC ACID ESTER
申请人:Amii Hideki
公开号:US20120220795A1
公开(公告)日:2012-08-30
Disclosed is a method for producing a compound having a difluoromethylene group at an even lower cost and with excellent yield. The production method of the present invention is a method for producing an aromatic difluoroacetic acid ester, which comprises reacting an iodobenzene containing an electro attracting group and an α-silyl difluoroacetic acid ester in the presence of a metal halide.
A new methodology for aromatic difluoromethylation is described. Aryl iodides reacted with alpha-silyldifluoroacetates upon treatment with copper catalyst in DMSO or DME to give the corresponding aryldifluoroacetates in moderate to good yields. The subsequent hydrolysis of aryldifluoroacetates and KF-promoted decarboxylation afforded a variety of difluoromethyl aromatics.