Construction of Multiple-Substituted Chiral Cyclohexanes through Hydrogenative Desymmetrization of 2,2,5-Trisubstituted 1,3-Cyclohexanediones
作者:Chang-Bin Yu、Bo Song、Mu-Wang Chen、Hong-Qiang Shen、Yong-Gui Zhou
DOI:10.1021/acs.orglett.9b03622
日期:2019.12.6
cyclohexanes motifs is a challenging topic in organic synthesis. By the combination of desymmetrization and remote stereocontrol, a ruthenium-catalyzed transfer hydrogenative desymmetrization of 2,2,5-trisubstituted 1,3-cyclohexanediones has been successfully developed for the construction of chiral multiple-substituted cyclohexanes with high enantioselectivity and diastereoselectivity. When an ester group
手性多取代的环己烷基序的构建是有机合成中一个具有挑战性的话题。通过脱对称和远程立体控制相结合,已成功地开发出钌催化的2,2,5-三取代的1,3-环己烷二酮的转移加氢脱对称反应,以构建具有高对映选择性和非对映选择性的手性多取代环己烷。当将酯基引入两个位置时,发生氢化脱对称/酯交换级联反应,从而提供具有三个对映选择性高的带有三个立体中心的双环内酯,包括两个离散的立体中心和一个季立体中心。产物是带有羟基和羰基官能团的多取代手性环己烷,