Polyfluoroenolates, R.sup.1 CX.dbd.CR.sup.2 OM (R.sup.1 is F or a perfluoroalkyl group, R.sup.2 is a perfluoroalkyl group, X is F, Cl or Br), are easily formed at good yields by dehydrohalogenation reaction of polyfluoroalcoholates, R.sup.1 CXY--CR.sup.2 HOM (Y is F, Cl or Br), with a strong base such as, e.g., an alkyl metal or an aryl metal. A typical example of the polyfluoroenolates is lithium pentafluoro-2-propenolate which is obtained from hexafluoro-2-propanolate. A polyfluoroenolate of the above general formula can be converted into another polyfluoroenolate having an alkyl or aryl group in place of the halogen X by reaction with an alkyl or aryl metal.
多
氟烯醇盐,R.sup.1 CX.dbd.CR.sup.2 OM(其中R.sup.1为F或
全氟烷基,R.sup.2为
全氟烷基,X为F、Cl或Br),可通过多
氟醇盐R.sup.1 CXY--CR.sup.2 HOM(Y为F、Cl或Br)与强碱(例如烷基
金属或芳基
金属)的脱卤反应轻松高产率地形成。多
氟烯醇盐的典型例子是由六
氟-2-
丙醇盐得到的五
氟-2-
丙烯醇锂盐。上述通用公式的多
氟烯醇盐可以通过与烷基或芳基
金属反应,将卤素X替换为烷基或芳基,转化为另一个多
氟烯醇盐。