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Synthesis 2006(23): 4065-4074
DOI: 10.1055/s-2006-950347
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
Further Information
Received
26 July 2006
Publication Date:
02 November 2006 (online)
Publication History
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.
Key words
amino acids - asymmetric synthesis - chiral auxiliaries - lactams - Mannich bases
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