Quand le difluorotrimethyl Silicon de tris(diethylamino) sulfonium est ajoute a une solution de benzaldehyde dans le THF et de (dichloromethyl trimethyl) 硅烷 une 反应 放热 产品 conduit apres traitement par un acide au dichloro-2,2 phenyl-1 乙醇 Divers (polyfluorovinyl) 硅烷 donnent les adduits avec un aldehyde avec des rendements moderes a forts
Fluoride ion-catalyzed generation and carbonyl addition of α-halo carbanions derived from α-halo organosilicon compounds
作者:Makoto Fujita、Michio Obayashi、Tamejiro Hiyama
DOI:10.1016/s0040-4020(01)86661-8
日期:1988.1
The title carbanion species are generated from the corresponding α-haloorganosilicon compounds by the action of a catalytic amount of tris(diethylamino)sulfonium difluorotrimethylsilicate and are found to undergo addition to aldehyde carbonyl efficiently at ambient temperature. The synthetic potential of the reaction is demonstrated by application to the synthesis of some insecticides.
gem-(Difluoroallyl)lithium: Preparation by lithium-halogen exchange and utilization in organosilicon and organic synthesis
作者:Dietmar Seyferth、Robert M. Simon、Dennis J. Sepelak、Helmut A. Klein
DOI:10.1021/ja00352a019
日期:1983.7
Abstract : GEM-Difluoroallyllithium may be generated by lithiumbromine exchange between n-butyllithium and CH2=CHCF2Br at -95 degrees C using an in situ procedure. When this Li(CF2CHCH2) preparation is carried out in the presence of chlorosilanes, aldehydes, ketones and esters, products of type R3SiCF2CH=CH2, RCH(OH)CF2CH=CH2, RR'C-(OH)CF2CH=CH, respectively, are formed, often in good yield. The factors
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