Enantio- and Diastereoselective Mannich-Type Reactions of α-Cyano Ketones with<i>N</i>-Boc Aldimines Catalyzed by Chiral Bifunctional Urea
作者:Ju Hee Lee、Dae Young Kim
DOI:10.1002/adsc.200900268
日期:2009.8
The catalytic enantioselective electrophilic Mannich-type reaction promoted by chiral bifunctional organocatalysts is described. The treatment of α-cyano ketones with N-Boc-aldimines under mild reaction conditions afforded the corresponding β-amino-α-cyano ketones with excellent diastereoselectivities (up to syn/anti=100/0), and excellent enantioselectivities (up to 99% ee).
描述了由手性双官能有机催化剂促进的催化对映选择性亲电曼尼希型反应。在温和的反应条件下,用N -Boc-醛亚胺处理α-氰基酮,得到相应的β-氨基-α-氰基酮,具有非对映选择性(高达syn / anti = 100/0)和出色的对映选择性(高达99) %ee)。