Chiral Aryl Pyridyl Alcohols as Enantioselective Catalysts in the Addition of Diethylzinc to Substituted Benzaldehydes
作者:Tien-Chu Chang、Chinpiao Chen
DOI:10.1002/jccs.200800088
日期:2008.6
(1/R)-(+)-α-pinene (> 97% ee), and applied in the enantioselective addition of diethylzinc to substituted benzaldehydes, to yield alcohols with the (S)-configuration with an enantiomeric excess that typically ranges from 19 to 86%. Importantly, the electron-withdrawing substituents at the meta-position of the substituted benzaldehydes exhibited high enantioselectivity during alkylation using diethylzinc
手性 (5-aryl-10,10-dimethyl-6-aza-tricyclo[7.1.1.0 2,7 ]undeca-2(7),3,5-trien-8-yl)-diphenyl-methanols 由高度对映纯 (1/R)-(+)-α-蒎烯 (> 97% ee),并应用于二乙基锌与取代苯甲醛的对映选择性加成,以产生具有 (S)-构型的醇,其对映体过量通常在范围内从 19% 到 86%。重要的是,取代苯甲醛间位的吸电子取代基在使用二乙基锌进行烷基化过程中表现出高对映选择性。