Highly Efficient Direct Asymmetric Aldol Reactions Catalyzed by a Prolinethioamide Derivative in Aqueous Media
作者:Bing Wang、Xin-wang Liu、Ling-yan Liu、Wei-xing Chang、Jing Li
DOI:10.1002/ejoc.201001115
日期:2010.11
acids L-proline and L-valine, was studied for the directasymmetricaldolreaction of acetone with various aromatic aldehydes at 0 °C or room temperature. A loading of only 0.1―0.2 mol-% of derivative 1c was employed in this catalytic system, and excellent enantio-selectivities and yields (up to 98 % yield, >99 % ee) could be achieved in aqueous media.