Difluoroallylic alcohols prepared in two steps from trifluoroethanol underwent a range of Claisen and related [3,3]-rearrangements in moderate to good yield. In one case, the rearrangement product underwent rapid dehydrofluorination to afford an interesting fluorodienal Monofluoroallylic alcohols rearranged more slowly but resisted dehydrofluorination.
由
三氟乙醇分两步制备的二
氟烯丙醇以中等至良好的收率进行了一系列的Claisen和相关的[3,3]重排。在一种情况下,重排产物经历快速的脱
氟化氢作用,得到令人感兴趣的
氟二烯单
氟代烯丙基醇,其重排的速度较慢,但抵抗了脱
氟化氢作用。