Asymmetric Total Synthesis
of (+)-Brefeldin A: Intramolecular Epoxide-Opening/RCM
Strategy
作者:Jinsung Tae、Myung-Yeol Kim、Hyemi Kim
DOI:10.1055/s-0029-1216723
日期:——
A highly efficientasymmetric total synthesis of (+)-brefeldin A was accomplished by using intramolecular epoxide opening of an epoxy allylsilane and RCM reaction for the constructions of the cyclopentane and macrocyclic lactone rings of (+)-brefeldin A, respectively.
通过使用环氧烯丙基硅烷的分子内环氧化物开环和 RCM 反应分别构建 (+)-brefeldin A 的环戊烷和大环内酯环,实现了 (+)-brefeldin A 的高效不对称全合成。
Formal Synthesis of (+)-Brefeldin A: Application of a Zinc-Mediated Ring Expansion Reaction
作者:Weimin Lin、Charles K. Zercher
DOI:10.1021/jo0701379
日期:2007.6.1
formal synthesis of (+)-brefeldin A was accomplished through a synthetic approach that relied upon three keys steps. The five-membered ring was generated in a stereocontrolled fashion through application of a tandem conjugate addition-intramolecular cyclization method developed by Toru. Ring-closingmetathesis provided access to a twelve-membered β-keto lactone, which was ring-expanded to the α,β-unsaturated-γ-keto