Chiral derivative 3 was shown to be a precursor of alpha and beta -substituted beta -amino acids as well as alpha,beta -disubstituted beta -amino acids. The key steps of the procedure are a diastereoselective alkylation of synthon 3 by organocuprates reagents and a diastereoselective alkylation of the: alkylated adduct. (C) 2000 Elsevier Science Ltd. All rights reserved.
Stereoselective α-Alkylation of New Chiral Auxiliaries: An Access to Enantiomerically Pure α- and α,β-Substituted β-Amino Acids
作者:Claude Agami、Sandrine Cheramy、Luc Dechoux
DOI:10.1055/s-1999-2925
日期:1999.11
New bicyclic heterocycles 5, which are potentially useful for the enantioselective synthesis of substituted β-amino acids, have been synthesized. A study on the α-alkylation of these chiral auxiliaries is presented. An optically pure β-amino acid was obtained in excellent yield from its masked chiral derivative 6a.