Direct asymmetric aldol reaction of acetophenones with aromatic aldehydes catalyzed by chiral Al/Zn heterobimetallic compounds
作者:Xiao Li、Lei Zhang、Yu-Hua Xiao、Qi-Peng Guo、Chao-Shan Da、Hong Li、Xiaoju Liu、Xiangrong Ma、Yajun Ma
DOI:10.1134/s1070363216080247
日期:2016.8
Chiral Al/Zn heterobimetallic complexes are effective catalysts for the direct highly enantioselective aldol reaction of acetophenones with aromatic aldehydes. The Al site in the complex acts as a Lewis acid to activate aldehyde, whereas ethylzinc alkoxide plays a role of a Brønsted base to form a reactive zinc enolate with acetophenone. Distinct nature of two different metals contributes to the efficient