A Novel D2-Symmetrical Chiral Tetraoxazoline Ligand for Highly Enantioselective Hydrosilylation of Aromatic Ketones
作者:Wei Jie Li、Sheng Xiang Qiu
DOI:10.1002/adsc.201000018
日期:——
A novel D2‐symmetrical chiral tetraoxazoline ligand was synthesized from 1,2,4,5‐benzenetetracarboxylic acid and L‐valinol via a one‐pot reaction, and the asymmetric hydrosilylation of aromaticketones was carried out in dichloromethane in the presence of 1.0 mol% of a bivalent copper ion catalyst with the tetraoxazoline to give optically active secondary alcohols. The chiral catalyst showed excellent