Divergent Synthetic Routes for Ring Expansion or Cyclization from 1,4-Allylic Diol Derivatives via Gold(I) Catalysis or Zinc(II) Mediation
作者:Li−Li Zhu、Xiao-Xiao Li、Wen Zhou、Xin Li、Zili Chen
DOI:10.1021/jo2015517
日期:2011.11.4
rearrangement, provided a new strategy to synthesize five-carbon homologated ring ketones. In addition, using ZnBr2, 2,5-dihydrofuran products were obtained in moderate to good yields via an intramolecular cyclization process.
开发了一种新的有效方法,通过金催化的烯丙基阳离子促进的频哪醇型重排,使用各种酯作为离去基团,将环状链烷醇转化为一碳高级同源酮。该反应,加上oxy-Cope重排,为合成五碳均聚物环酮提供了新的策略。另外,使用ZnBr 2,通过分子内环化过程以中等至良好的产率获得了2,5-二氢呋喃产物。