Enantioselective Catalytic Asymmetric A3 Coupling with Phosphino-Imidazoline Ligands
作者:Balaji V. Rokade、Patrick J. Guiry
DOI:10.1021/acs.joc.9b00728
日期:2019.5.3
A practical application of the UCD-PHIM ligand in the copper-catalyzed asymmetric A3 coupling is reported for aromatic, alkenylic, and alkynylic aldehydes under mild reaction conditions, low catalytic loading, and at ambient temperature. A broad range of aldehydes, secondary amines with a cheaper ethyne equivalent, 2-methyl-3-butyn-2-ol, was explored and enantioselectivities of up to 99% ee were obtained