Development of an Anomalous Heck Reaction: Skeletal Rearrangement of Divinyl and Enyne Carbinols
作者:J. Maina Ndungu、Kimberly K. Larson、Richmond Sarpong
DOI:10.1021/ol052382p
日期:2005.12.1
[reaction: see text] A general set of conditions that achieves the union of aryl halides and divinyl or enyne carbinols to afford tri- or tetrasubstituted olefins in good yields (up to 83%) is described. The mechanism by which this proceeds is believed to involve the intermediacy of a cyclopropanol, followed by a novel skeletal reorganization. The ability to suppress beta-hydride elimination of organopalladium
Copper(I)-catalyzed phosphonyldifluoromethylation of allylic alcohols promoted by daylight is described. This method provides a facile and economic access to a series of 3-difluoromethylphosphonate-1,2-diphenylpropan-1-ones. Mechanistic studies reveal that a radical process is involved in the reaction.