[EN] ASYMMETRIC MICHAEL AND ALDOL ADDITION USING BIFUNCTIONAL CINCHONA-ALKALOID-BASED CATALYSTS [FR] ADDITIONS ASYMETRIQUES DE MICHAEL ET D'ALDOL UTILISANT DES CATALYSEURS BIFONCTIONNELS A BASE DE CINCHONINE
Catalytic Enantioselective C−C Bond Forming Conjugate Additions with Vinyl Sulfones
作者:Hongming Li、Jun Song、Xiaofeng Liu、Li Deng
DOI:10.1021/ja0511063
日期:2005.6.1
highly enantioselective catalytic conjugateaddition to vinyl sulfones. Promoted by readily accessible organocatalysts derived from C6'-OH cinchona alkaloid derivatives and under mild, air- and moisture-tolerant conditions, conjugateadditions of a wide range of alpha-cyanoacetates bearing either an alpha-aryl or an alpha-alkyl substituent to vinyl sulfones proceeded in excellent enantioselectivity and
在这篇通讯中,我们描述了第一个高度对映选择性催化共轭添加到乙烯基砜的开发。由衍生自 C6'-OH 金鸡纳生物碱衍生物的易于获得的有机催化剂促进,在温和、耐空气和耐湿的条件下,将带有 α-芳基或 α-烷基取代基的各种 α-氰基乙酸酯共轭加成到乙烯基砜以优异的对映选择性和高产率进行。因此,这种高效且操作简单的对映选择性 CC 键形成共轭加成为全碳四元立体中心的对映选择性构建提供了一种新的有用的方法。
Enantioselective construction of quaternary carbon centre catalysed by bifunctional organocatalyst
The bifunctional thiourea–tertiary amine derivatives of simple chiral diamines serve as highly enantioselective catalysts for the Michael addition of α-substituted cyanoacetates to vinyl sulfones, giving an efficient protocol for the construction of an all-carbon substituted quaternary stereocentre.
Conjugate Addition Reactions Using Bifunctional Cinchona-Alkaloid-Based Catalysts
申请人:Deng Li
公开号:US20110295011A1
公开(公告)日:2011-12-01
One aspect of the present invention relates to quinine-based and quinidine-based catalysts. Another aspect of the present invention relates to a method of preparing a chiral, non-racemic compound from a prochiral electron-deficient alkene, comprising the step of: reacting a prochiral electron-deficient alkene with a nucleophile in the presence of a catalyst; thereby producing a chiral, non-racemic compound; wherein said catalyst is a derivatized quinine or quinidine.