Development of Chiral Catalysts by Asymmetric Activation for Highly Enantioselective Diethylzinc Addition to Imines
作者:Liu-Zhu Gong、Hai-Le Zhang、Hua Liu、Xin Cui、Ai-Qiao Mi、Yao-Zhong Jiang
DOI:10.1055/s-2005-863709
日期:——
derived from chiral 1,2-diphenyl-ethanene-1,2-diamine, BINOL derivatives, and diethylzinc are evaluated in the asymmetric addition of diethylzinc to N-acylimines. In the presence of 10 mol% L3ZnAl, high enantioselectivities and yields were provided for a wide range of aromatic imines in 1,2-dichloroethane at -25 °C.
基于不对称活化概念,在不对称加成中评估了由衍生自手性 1,2-二苯基-乙烷-1,2-二胺、BINOL 衍生物和二乙基锌的二亚胺组合形成的原位手性锌配合物库二乙基锌转化为 N-酰基亚胺。在 10 mol% L3ZnAl 存在下,在 -25 °C 下,1,2-二氯乙烷中的多种芳族亚胺均具有高对映选择性和产率。