Asymmetric hydrogenolysis of racemic tertiary alcohols, 3-substituted 3-hydroxyisoindolin-1-ones, was developed using chiral phosphoric acid as catalyst and a Hantzsch ester as the hydrogen source with up to 95% ee. The reaction process of this asymmetric transfer hydrogenation may occur directly through the acyliminium ion intermediate.
使用手性磷酸作为催化剂和 Hantzsch 酯作为氢源开发了外消旋叔醇(3-取代的 3-羟基异吲哚啉-1-酮)的不对称氢解,其 ee 高达 95%。这种不对称转移氢化的反应过程可以直接通过酰亚胺离子中间体发生。
Divergent Synthesis of Tunable Cyclopentadienyl Ligands and Their Application in Rh-Catalyzed Enantioselective Synthesis of Isoindolinone
作者:Wen-Jun Cui、Zhi-Jie Wu、Qing Gu、Shu-Li You
DOI:10.1021/jacs.0c02813
日期:2020.4.22
unprecedented enantioselective [4+1] annulation reaction of benzamides and alkenes was achieved with a broad substrate scope under mild reaction conditions, providing a variety of isoindolinones with excellent regio- and enantioselectivity (up to 94% yield, 97:3 er). Preliminary mechanistic studies suggest that the reaction involves an oxidative Heck reaction and an intramolecular enantioselective alkene