.alpha.,.beta.-Epoxy sulfoxides as useful intermediates in organic synthesis. 21. A novel approach to the asymmetric synthesis of epoxides, allylic alcohols, .alpha.-amino ketones, and .alpha.-amino aldehydes from carbonyl compounds through .alpha.,.beta.-epoxy sulfoxides using the optically active p-tolylsulfinyl group to induce chirality
An Efficient Catalytic Asymmetric Epoxidation Method
作者:Zhi-Xian Wang、Yong Tu、Michael Frohn、Jian-Rong Zhang、Yian Shi
DOI:10.1021/ja972272g
日期:1997.11.1
This article describes a highly effective catalyticasymmetricepoxidation method for olefins using potassium peroxomonosulfate (Oxone, Dupont) as oxidant and a fructose-derived ketone (1) as catalyst. High enantioselectivies have been obtained for trans-disubstituted and trisubstituted olefins which can bear functional groups such as tributylsilyl ether, acetal, chloride, and ester. The enantiomeric