One-Step Asymmetric Construction of 1,4-Stereocenters via Tandem Mannich-Isomerization Reactions Mediated by a Dual-Functional Betaine Catalyst
作者:Yu Deng、Xiaohuo Shi、Guangfa Shi、Xingyu Lu、Jisheng Luo、Li Deng
DOI:10.1021/jacsau.2c00465
日期:2022.12.26
Mannich-isomerization reaction that allows the direct construction of 1,4-stereocenters in a highly stereoselective manner. This asymmetric transformation demonstrated the potential of a tandem nucleophilic addition-isomerization reaction as a broadly useful strategy for the efficient construction of 1,4-stereocenters. Notably, this tandem reaction was mediated by a single chiral betaine as a dual-functional
包含不相邻立体中心的手性基序的构建是一项重大挑战,因为它们通常是使用不同的手性催化剂在不同的步骤中构建的。因此,开发简化此类复杂基序构造的新策略已成为不对称合成的主要焦点。我们在此报告了前所未有的不对称串联曼尼希异构化反应,该反应允许以高度立体选择性的方式直接构建 1,4-立体中心。这种不对称转化证明了串联亲核加成异构化反应作为有效构建 1,4-立体中心的广泛有用策略的潜力。值得注意的是,这种串联反应是由作为双功能催化剂的单一手性甜菜碱介导的,