Chiral Phosphoric Acid Catalyzed Kinetic Resolution of Indolines Based on a Self-Redox Reaction
作者:Kodai Saito、Takahiko Akiyama
DOI:10.1002/anie.201510692
日期:2016.2.24
A strategy for oxidative kinetic resolution of racemic indolines was developed, employing salicylaldehyde derivative as the pre‐resolving reagent and chiral phosphoric acid as the catalyst. The iminium intermediate, formed by the condensation reaction of an enantiomer of indoline with salicylaldehyde derivative, was hydrogenated by the same enantiomer of indoline to afford another enantiomer of indoline
开发了一种外消旋二氢吲哚的氧化动力学拆分策略,采用水杨醛衍生物作为预拆分试剂,手性磷酸作为催化剂。由吲哚啉的对映异构体与水杨醛衍生物的缩合反应形成的亚胺中间体通过相同的吲哚啉对映异构体进行氢化,通过自氧化还原机理得到另一种吲哚啉对映异构体。2-芳基取代的二氢吲哚的氧化动力学拆分继续以高收率和出色的对映选择性产生对映异构体。