Novel chiral thiazoline-containing N―O ligands in the asymmetric addition of diethylzinc to aldehydes: substituent effect on the enantioselectivity
作者:Zhiyong Gong、Qingwen Liu、Pengchong Xue、Kechang Li、Zhiguang Song、Zaiqun Liu、Yinghua Jin
DOI:10.1002/aoc.2820
日期:2012.3
Several novelchiral thiazoline primary and tertiary alcohols were easily synthesized from commercially available l‐cysteine in three steps and with high yield. These ligands were subsequently applied to the asymmetricaddition of diethylzinc (Et2Zn) to various aldehydes. Products with S configuration were obtained when thiazoline‐containing tertiary alcohol ligands were used as catalysts. The primary