Synthesis 2006(23): 4065-4074  
DOI: 10.1055/s-2006-950347
SPECIALTOPIC
© Georg Thieme Verlag Stuttgart · New York

(+)-(S,S)-Pseudoephedrine as a Chiral Auxiliary in Asymmetric Mannich Reactions: Scope and Limitations

Ainara Iza, Jose L. Vicario, Luisa Carrillo, Dolores Badía*
Departamento de Química Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco-Euskal Herriko Unibertsitatea, P.O. Box 644, 48080 Bilbao, Spain
Fax: +34(94)6012748; e-Mail: dolores.badia@ehu.es;
Further Information

Publication History

Received 26 July 2006
Publication Date:
02 November 2006 (online)

Abstract

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 procedures.