Abstract 3, 3-Difluoroallyltrimethyltin has been prepared by the reaction of β-trimethylstannylethylidenetriphenylphosphor... with chlorodifluoromethane. This tin compound reacts with n-butyllithium in tetrahydrofuran at-95 C to generate gem-difluoroallyllithium. The latter, however, is not stable in solution at that temperature. If generated in situ in the presence of a triorganochlorosilane, products of the type R 3 SiCF 2 CH CH 2 are obtained in good yield. Addition to the C O bond of 3- ...
