Chang Xin, Cheng Xiang, Liu Xue-Tao, Fu Cong, Wang Wei-Yi, Wang Chun-Jiang
College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, Wuhan, 430072, China.
State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin, 300071, China.
Angew Chem Int Ed Engl. 2022 Sep 5;61(36):e202206517. doi: 10.1002/anie.202206517. Epub 2022 Jul 26.
An unprecedented hydroalkylation of racemic allylic alcohols and racemic ketimine esters enabled by Cu/Ru relay catalysis has been developed via merging the ruthenium-catalyzed asymmetric borrowing-hydrogen reaction with a copper-catalyzed asymmetric Michael addition in a one-pot procedure. The current method enables the efficient preparation of highly functionalized δ-hydroxyesters bearing 1,4-nonadjacent stereocenters in good yields with high levels of diastereoselectivity and excellent enantioselectivity under mild reaction conditions. The full complement of the four stereoisomers of hydroalkylation products could be readily accessed by orthogonal permutations of two chiral metal catalysts. The current work highlights the power of relay catalysis for the stereodivergent construction of 1,4-nonadjacent stereocenters that were otherwise inaccessible.
通过将钌催化的不对称借氢反应与铜催化的不对称迈克尔加成反应一锅法合并,开发了一种由铜/钌接力催化实现的外消旋烯丙醇和外消旋酮亚胺酯的前所未有的氢烷基化反应。该方法能够在温和的反应条件下,以良好的收率、高非对映选择性和优异的对映选择性高效制备含有1,4-非相邻立体中心的高度官能化的δ-羟基酯。通过两种手性金属催化剂的正交排列,可以很容易地获得氢烷基化产物的四种立体异构体的完整组合。目前的工作突出了接力催化在立体发散构建1,4-非相邻立体中心方面的强大能力,而这些立体中心在其他情况下是无法获得的。