Organocatalytic Enantioselective Mannich-Type Reaction of Phosphorus Ylides: Synthesis of Chiral <i>N</i>-Boc-β-Amino-α-methylene Carboxylic Esters
作者:Yan Zhang、Yan-Kai Liu、Tai-Ran Kang、Ze-Kai Hu、Ying-Chun Chen
DOI:10.1021/ja7114844
日期:2008.2.1
The first asymmetric Mannich-type reaction of stabilized phosphorus ylides and N-Boc aldimines was described promoted by a readily available and recyclable chiral bisthiourea organocatalyst. Subsequent reaction with formalin smoothly provides N-Boc-β-amino-α-methylene carboxylic esters in a highly enantiomerically enriched form (up to 96% ee).
稳定的磷叶立德和 N-Boc 醛亚胺的第一个不对称曼尼希型反应由易于获得且可回收的手性双硫脲有机催化剂促进。随后与福尔马林的反应顺利地提供了高度对映体富集形式(高达 96% ee)的 N-Boc-β-氨基-α-亚甲基羧酸酯。