Fluorinative Rearrangements of Substituted Phenylallenes Mediated by (Difluoroiodo)toluene: Synthesis of α-(Difluoromethyl)styrenes
作者:Zhensheng Zhao、Léanne Racicot、Graham K. Murphy
DOI:10.1002/anie.201706798
日期:2017.9.11
(difluoroiodo)toluene in the presence of 20 mol % BF3⋅OEt2 to yield α‐difluoromethyl styrenes. This unprecedented reaction was entirely chemoselective for the internal allene π bond, and showed remarkable regioselectivity during the fluorination event. Substituted phenylallenes, phenylallenes possessing both phenyl‐ and α‐allenyl substituents, and diphenylallenes were investigated, and good functional‐group
在20摩尔%BF 3· OEt 2存在下,苯二烯在(二氟碘)甲苯的作用下发生氟化重排,生成α-二氟甲基苯乙烯。这种空前的反应对内部的内烯键π完全是化学选择性的,并且在氟化过程中表现出显着的区域选择性。研究了取代的苯基亚烷基,同时具有苯基和α-烯丙基取代基的苯基亚烷基以及二苯基亚烷基,并且在整个过程中均观察到良好的官能团相容性。易于大规模制备异戊二烯,并且该反应的操作简便性使我们能够快速获得常规脱氧氟化策略无法获得的含氟结构单元。