Copper-Catalyzed Asymmetric Conjugate Addition of Alkene-Derived Nucleophiles to Alkenyl-Substituted Heteroarenes
作者:Ying Wang、JianJun Yin、Yanfei Li、Xiuping Yuan、Tao Xiong、Qian Zhang
DOI:10.1021/acscatal.2c01629
日期:2022.8.5
We herein report the copper-catalyzed asymmetric conjugate addition of β-substituted alkenyl heteroarenes, the one of most challenging Michael acceptors, with alkenes as the latent nucleophiles. Diverse chiral heteroarenes bearing two vicinal stereocenters were obtained in good to excellent yields, generally excellent enantioselectivity, and a good level of diastereoselectivity. The products of the
我们在此报告了铜催化的β-取代的烯基杂芳烃的不对称共轭加成,这是最具挑战性的迈克尔受体之一,烯烃作为潜在的亲核试剂。以良好至优异的产率、通常优异的对映选择性和良好的非对映选择性获得了带有两个邻位立体中心的多种手性杂芳烃。通过手性胺催化,迈克尔加成的产物可以很容易地转化为其他有价值的非环状对映体富集结构,这些结构带有三个连续的立体中心。进行了机制研究,包括同位素标记实验、非线性效应研究、动力学同位素效应实验和初始速率动力学研究,实验结果表明氢化铜化步骤可能是营业额限制步骤。而且,