Unprecedented Alkene Stereocontrol in the Claisen Rearrangement of Cyclic Bis-Allylic Esters
作者:Chris McFarland、John Hutchison、Matthias C. McIntosh
DOI:10.1021/ol0511732
日期:2005.8.1
The Ireland and ester enolate Claisen rearrangements of tertiary substituted bis-allylic esters derived from cyclohexenones afford pentenoic acids that possess tri- and tetrasubstituted alkylidenes with unprecedented levels of stereoselectivity. In some cases the higher energy exocyclic alkene is the major product. [reaction: see text]