Chiral‐Directing‐Group‐Assisted Rhodium(III)‐Catalyzed Asymmetric Addition of Inert Arene C−H Bond to Aldimines with Subsequent Intramolecular Cyclization
作者:Xuhong Cai、Wenkun Chen、Ruifang Nie、Jun Wang
DOI:10.1002/chem.202103319
日期:2021.12
An asymmetric rhodium(III)-catalyzed C−H bond addition to aldimines followed by subsequent intramolecular cyclization to form chiral isoindolinones has been achieved by using a chiral directing group. Various substituted benzamides and aldimines have been smoothly transformed to the corresponding products in up to 68 % yield with up to 93 % ee.
A highly efficient and accessible synthesis of chiral 3-substitutedisoindolinoneframeworks is described. The synthesis involved the Rh(I)-catalyzed asymmetric arylation of boronic acids to 2-halobenzaldimines and the subsequent Rh(I)-catalyzed intramolecular aminocarbonylation of the resulting 2-halobenzylamines using an aldehyde as the carbonyl source. The method tolerates a variety of functional