Efficient Syntheses of Secondary and Tertiary 2-Aryl- and 2-Heteroaryl-allyl Alcohols
作者:Alan R. Katritzky、Dorin Toader、Xiaojing Wang
DOI:10.1021/jo980840k
日期:1998.12.1
Reactions of alpha-aryl-, alpha-heteroaryl-, and alpha-heteroatom-substituted masked alkenyllithiums with aldehydes and ketones provide a general method for the synthesis of allylic alcohols substituted with an aryl or heteroaryl in the beta position and aryl, heteroaryl or alkyl substituents in the a position via a [1,4]-C-->O silicon rearrangement. In the case of reactions with enolizable aldehydes and ketones, anhydrous CeCl3 was used as an additive. High diastereoselectivities are observed for allyl alcohols produced from a-substituted aldehydes.