Synthesis of α-Hydroxyallenes by Copper-Catalyzed S<sub>N</sub>2′ Substitution of Propargylic Dioxolanones
作者:Xiaoping Tang、Simon Woodward、Norbert Krause
DOI:10.1002/ejoc.200900226
日期:2009.6
catalytic method for the synthesis of α-hydroxyallenes is described. Efficient SN2′ substitution of propargylic dioxolanones has been achieved with a copper(I)/P(OBu)3 catalyst using Grignardreagents as the nucleophiles. The reaction tolerates a wide variety of propargylic dioxolanones, the corresponding primary and secondary α-hydroxyallenes are obtained in good to excellent yields and excellent diastereoselectivity