The generation of gem-difluoroallyllithium by the transmetalation reaction
作者:Dietmar Seyferth、Karl R. Wursthorn
DOI:10.1016/s0022-328x(00)83532-9
日期:1977.9
3,3-Difluoroallyltrimethyltin was prepared by reaction of chlorodifluoromethane with the ylide reagent Ph3PCHCH2SnMe3 gem-Difluoroallyllithium, which was generated by the reaction of n-butyllithium with 3,3-difluoroallyltrimethyltin in THF at −95°, was of very limited stability at that temperature. However, in situ procedures and alternate incremental addition procedures allowed its application in
gem-Difluoroallyllithium: Preparation by the transmetalation procedure and some reactions
作者:Dietmar Seyferth、Karl R. Wursthorn
DOI:10.1016/s0022-328x(00)83935-2
日期:1979.12
3,3-Difluoroallyltrimethyltin has been prepared by the reaction of β-trimethylstannylethylidenetriphenylphosphorane 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