Applications of [2,3]-sigmatropic rearrangements to natural products synthesis. The total synthesis of .+-.-bakkenolide-A (fukinanolide)
作者:David A. Evans、Charles L. Sims、Glenn C. Andrews
DOI:10.1021/ja00458a037
日期:1977.8
A stereoselective total synthesis of the /3-methylene-y-lactone sesquiterpene, bakkenolide-A, is reported. The use of [2,3]-sigmatropic rearrangements within the context of constructing asymmetric quaternary centers has been explored. It has been found that steric factors appear to play a significant role in defining the levels of stereoselectivity observed in this class of molecular rearrangements
立体选择性全合成 /3-亚甲基-γ-内酯倍半萜,bakkenolide-A,被报道。已经探索了在构建不对称四元中心的背景下使用 [2,3]-sigmatropic 重排。已经发现,空间因素似乎在定义在这类分子重排中观察到的立体选择性水平方面起着重要作用。作为一般反应类型,[2,3]-σ 重排构成了一类极其通用的键重组过程,在有机合成中有许多明显的应用。在过去的十年中,这种重排得到了广泛的研究,方程 1 中说明的基本过程的一般性已被众多研究人员建立。