[EN] PROCESS FOR THE PREPARATION OF (2R, 3R)-2-HYDROXY-3-AMINO-3-ARYL-PROPIONAMIDE AND (2R, 3R)-2-HYDROXY-3-AMINO-3-ARYL-PROPIONIC ACID ALKYL ESTER [FR] PROCEDE POUR PREPARER DU (2R, 3R)-2-HYDROXY-3-AMINO-3-ARYL-PROPIONAMIDE ET UN ESTER D'ALKYLE D'ACIDE (2R, 3R)-2-HYDROXY-3-AMINO-3-ARYL-PROPIONIQUE
Process For the Preparation of (2R,3R)-2-Hydroxy-3-Amino-3-Aryl-Propionamide and (2R,3R)-2-Hydroxy-3-Amino-3-Aryl-Propionic Acid Alkyl Ester
申请人:Kuilman Thijs
公开号:US20080249310A1
公开(公告)日:2008-10-09
The invention relates to a novel compound (2R,3R)-2-hydroxy-3-amino-3-aryl-propionamide according to formula (1), wherein aryl A represents a substituted or unsubstituted aromatic ring,
and to a process for the preparation of said compound of formula (1), wherein a reaction mixture comprising the two enantiomers (2R,3S) and (2S,3R) of trans-3-aryl glycidic acid alkyl ester and the two enantiomers (2R,3R) and (2S,3S) of cis-3-aryl glycidic acid alkyl ester, said mixture being enantiomerically and diastereomerically enriched in the (2R,3S)-trans-3-arylglycidic acid alkyl ester, is reacted with ammonia. The invention further relates to a process for the preparation of (2R,3R)-2-hydroxy-3 amino-3-aryl-propionic alkyl ester.