[3,3]-Sigmatropic Rearrangement Routes to β-Fluoro- and β,β-Difluoro-carbonyl Derivatives.
作者:Sunita T. Patel、Jonathan M. Percy、Robin D. Wilkes
DOI:10.1016/0040-4020(95)00694-4
日期:1995.10
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。