Facile Entry to the Tetracyclic 5-7-6-3 Tigliane Ring System
作者:Timo V. Ovaska、Sarah E. Reisman、Meghan A. Flynn
DOI:10.1021/ol006823a
日期:2001.1.1
[figure: see text] A tandem anionic 5-exo-dig cyclization/Claisen rearrangement sequence was used to effect a facile, "one-pot" conversion of an appropriately substituted 4-alkyn-1-ol to the tetracyclic carbon core structure of phorbol. The synthesis was conducted using readily available nonracemic starting materials to provide the target structure as a single enantiomer in high chemical yield.