Chiral <i>N</i>-Acylethylenediamines as New Modular Ligands for the Catalytic Asymmetric Addition of Alkylzinc Reagents to Aldehydes
作者:Christopher M. Sprout、Christopher T. Seto
DOI:10.1021/jo0347516
日期:2003.10.1
Chiral N-acylethylenediamines represent a new class of modular ligands for the catalytic asymmetric addition of alkylzincreagents to aldehydes. The N-acylethylenediamine moiety serves as a metal binding site, while attached amino acids provide the source of chirality. Three sites of diversity on the ligands were optimized to enhance the enantioselectivity of the catalysts using an iterative optimization