Highly Enantioselective Synthesis of γ-Hydroxy-α,β-acetylenic Esters Catalyzed by a β-Sulfonamide Alcohol
作者:Li Lin、Xianxing Jiang、Weixia Liu、Li Qiu、Zhaoqing Xu、Jiangke Xu、Albert S. C. Chan、Rui Wang
DOI:10.1021/ol070692x
日期:2007.6.1
concerns the asymmetric addition of methyl propiolate to aldehydes with 1,2-dimethoxyethane (DME) as additive and beta-sulfonamide alcohol titanium complex as a catalyst. The reactions proceeded under mild conditions and gave the highly functionalized chiral propargylic alcohols with high ee values and good yields. Differences between three types of ligands have also been discussed.