(+)-(<i>S</i>,<i>S</i>)-Pseudoephedrine as a Chiral Auxiliary in Asymmetric Mannich Reactions: Scope and Limitations
作者:Dolores Badía、Ainara Iza、Jose Vicario、Luisa Carrillo
DOI:10.1055/s-2006-950347
日期:2006.12
The Mannich reaction of variously substituted (+)-(S,S)-pseudoephedrine amides with either enolizable and nonenolizable imines smoothly afforded a series of β-substituted α-alkyl-β-amino amides with full stereochemical control. These Mannich adducts have been converted into several synthetically useful chiral building blocks like β-amino esters, β-amino acids, and β-lactams using very simple and high-yielding
各种取代的 (+)-(S,S)-伪麻黄碱酰胺与烯醇化和非烯醇化亚胺的 Mannich 反应顺利地提供了一系列具有完全立体化学控制的 β-取代的 α-烷基-β-氨基酰胺。这些 Mannich 加合物已通过非常简单和高产率的程序转化为几种合成有用的手性结构单元,如 β-氨基酯、β-氨基酸和 β-内酰胺。