A novel double insertion of the difluoromethylene unit from trifluoromethylcopper into the carbon–copper bond of perfluoroaryl- and perfluorovinylcopper reagents: preparation, mechanism and applications of new fluorinated copper reagents
作者:Zhen-Yu Yang、Donald J. Burton
DOI:10.1016/s0022-1139(99)00247-x
日期:2000.3
(E)-CF3CFCFCF2CF2Cu, which could be trapped with allyl bromide to give (E)-CF3CFCFCF2CF2CH2CHCH2. When CF2CFCu was used as a substrate, (E)-CF3CFCFCF2CF2Cu was observed, but in low yield. A mechanism for this novel double CF2 insertion is proposed to involve a copper difluorocarbenoid complex intermediate, which inserted into the carbon–copper bond of the fluorinated phenyl and vinylcoppers to form fluorinated