The enantioselective biocatalyzed reduction of the C=C bond of some (Z)-methyl alpha-halo-beta-arylacrylates was investigated. The reaction was performed by baker's yeast fermentation and Old Yellow Enzymes 1-3 mediated biotransformations. The final products were, respectively, enantiomerically enriched (S)-alpha-halo-beta-arylpropionic acids and their methyl esters, and ester hydrolysis was promoted in the whole cell system. High conversions and enantioselectivity values were observed when the aromatic ring was substituted by an electron-withdrawing group. Further manipulation of two of these enantiomerically enriched (S)-haloacids afforded p-substituted D-phenylalanines.
Biocatalyzed Enantioselective Reduction of Activated C=C Bonds: Synthesis of Enantiomerically Enriched alpha-Halo-beta-arylpropionic Acids
Monti Daniela;
2011
Abstract
The enantioselective biocatalyzed reduction of the C=C bond of some (Z)-methyl alpha-halo-beta-arylacrylates was investigated. The reaction was performed by baker's yeast fermentation and Old Yellow Enzymes 1-3 mediated biotransformations. The final products were, respectively, enantiomerically enriched (S)-alpha-halo-beta-arylpropionic acids and their methyl esters, and ester hydrolysis was promoted in the whole cell system. High conversions and enantioselectivity values were observed when the aromatic ring was substituted by an electron-withdrawing group. Further manipulation of two of these enantiomerically enriched (S)-haloacids afforded p-substituted D-phenylalanines.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
