Optimization of Asymmetric Catalysts Using Achiral Ligands: Metal Geometry-Induced Ligand Asymmetry
作者:Timothy J. Davis、Jaume Balsells、Patrick J. Carroll、Patrick J. Walsh
DOI:10.1021/ol016003d
日期:2001.7.1
resolved chiral ligands. In this Letter, we optimize the asymmetric addition of diethylzinc to aldehydes by modification of achiral methylene bis(phenol) ligands. Upon coordination of the substrate, the achiralligand becomes asymmetric, a concept termed Metal Geometry-Induced LigandAsymmetry. The enantioselectivity of the catalyst formed from a single resolved ligand and several achiralligands ranged from