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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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