Asymmetric Friedel-Crafts Alkylations Catalyzed By Bifunctional Cinchona Alkaloids
申请人:Deng Li
公开号:US20090203913A1
公开(公告)日:2009-08-13
In certain embodiments, the present invention relates to methods for asymmetric Friedel-Crafts alkylation catalyzed by bifunctional cinchona alkaloids. In certain embodiments, the catalyst is a 6′-OH cinchona alkaloid. In certain embodiments, the electrophile is an α-ketoester or aldehyde. In certain embodiments, the nucleophile is an aromatic heterocycle. In certain embodiments, the nucleophile is an aromatic N-containing heterocycle. In certain embodiments, the nucleophile is an indole. In certain embodiments, the methods of the invention are relatively insensitive to concentration, temperature, air and moisture.