1,1-Difluoroallenes are synthesized in good yield via zinc-promoted 1,2-elimination of 3,3-difluoro-2-iodoallylic acetates, which are prepared by the reaction of aldehydes or ketones with 1-iodo-2,2-difluorovinyllithium, generated from commercially available 1,1,1-trifluoro-2-iodoethane.
1,1-二
氟烯烃通过
锌促进的1,2-消除反应,以良好的产率合成,所用的起始物为3,3-二
氟-2-
碘烯基
乙酸酯,这些
乙酸酯通过醛或酮与从商业可得的1,1,1-三
氟-2-
碘乙烷生成的1-
碘-2,2-二
氟乙烯锂反应制备。