Synthesis of gem-difluorocyclopropanes in a phase-transfer catalysed system

P Bałcerzak, M Fedoryński, A Jończyk

Index: Balcerzak, Pawel; Fedorynski, Michal; Jonczyk, Andrzej Journal of the Chemical Society, Chemical Communications, 1991 , # 12 p. 826 - 827

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Abstract

Application of phase-transfer catalysed systems2.3 (alkali metal hydroxide and a quaternary onium salt as a catalyst) for generation of dihalogenocarbenes from the corresponding haloforms in the presence of alkenes provides a simple and efficient preparation of gem-dihalogenocyclopropanes, with the exception of the gem-difluoro-derivatives.4 Starting from HCCIF2 and alkenes under the above conditions, the yields of ...