Copper-Catalyzed Desymmetric Intramolecular Ullmann C–N Coupling: An Enantioselective Preparation of Indolines
摘要:
The first highly enantioselective copper-catalyzed intramolecular Ullmann C-N coupling reaction has been developed. The asymmetric desymmetrization of 1,3-bis(2-iodoaryl)propan-2-amines catalyzed by CuI/(R)-BINOL-derived ligands led to the enantioselective formation of indolines in high yields and excellent enantiomeric excesses. This method was also applied to the formation of 1,2,3,4-tetrahydroquinolines in high yields and excellent enantioselectivity.
Development and Challenges in Copper-Catalyzed Asymmetric Ullmann-Type Coupling Reactions
作者:Qian Cai、Fengtao Zhou
DOI:10.1055/s-0032-1317866
日期:——
Ullmann-type coupling is one of the most powerful methods for the formation of aryl C–C, C–N, and C–O bonds. Yet asymmetric Ullmanncoupling has received little attention because of the great challenges in both ligand and reaction designs. The success of the first catalytic enantioselective intramolecular Ullmann C–N coupling reaction through an asymmetric desymmetrization strategy offers a new way