The stereochemical outcome of the condensation reactions of aliphatic and aromatic aldehydes with the metal complexes 1 is strongly dependent on the nature of the metal ion. The copper(II) complex la only affords threo-P-hydroxy-cr-amino acids with fairly good enantiomeric excesses when reacting with aromatic aldehydes. The zinc(II) complex Ib gives a mixture of three and erythro diastereoisomers with a predominance of the erythro forms in the case of aromatic aldehydes.
ASYMMETRIC-SYNTHESIS OF BETA-HYDROXY-ALPHA-AMINO ACIDS BY CONDENSATION OF ALIPHATIC AND AROMATIC-ALDEHYDES WITH ZINC(II) AND COPPER(II) COMPLEXES OF (1R)-3-HYDROXYMETHYLENE BORNAN-2-ONE GLYCINE IMINES / G. Jommi, A. Laudi, R. Pagliarin, G. Sello, M. Sisti. - In: GAZZETTA CHIMICA ITALIANA. - ISSN 0016-5603. - 124:7(1994), pp. 299-300.
ASYMMETRIC-SYNTHESIS OF BETA-HYDROXY-ALPHA-AMINO ACIDS BY CONDENSATION OF ALIPHATIC AND AROMATIC-ALDEHYDES WITH ZINC(II) AND COPPER(II) COMPLEXES OF (1R)-3-HYDROXYMETHYLENE BORNAN-2-ONE GLYCINE IMINES
R. Pagliarin;G. SelloPenultimo
;
1994
Abstract
The stereochemical outcome of the condensation reactions of aliphatic and aromatic aldehydes with the metal complexes 1 is strongly dependent on the nature of the metal ion. The copper(II) complex la only affords threo-P-hydroxy-cr-amino acids with fairly good enantiomeric excesses when reacting with aromatic aldehydes. The zinc(II) complex Ib gives a mixture of three and erythro diastereoisomers with a predominance of the erythro forms in the case of aromatic aldehydes.Pubblicazioni consigliate
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