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