Abstract: A method for producing a 2-octylglycine ester having optical activity from a racemic 2-octyl-DL-glycine ester and, more particularly, to a method for producing a 2-octyl-L-glycine ester or a 2-octyl-D-glycine ester by using a chiral mandelic acid as an optical resolution agent.

Abstract: This invention relates to a method of preparing optically active ?-2-thienyl-alanine, and more particularly to a method of preparing optically active ?-2-thienyl-L-alanine or optically active ?-2-thienyl-D-alanine through an optical resolution reaction using chiral dibenzoyl tartaric acid or a derivative thereof as an optical resolving agent.

Abstract: This invention relates to a method of preparing D-arginine, and more particularly to a method of preparing D-arginine by optically resolving DL-arginine using D-3-bromocamphor-8-sulfonic acid or a salt thereof as an optical resolving agent.

Abstract: A method of preparing D-4,4?-biphenylalanine alkyl ester or L-4,4?-biphenylalanine alkyl ester by subjecting DL-4,4?-biphenylalanine alkyl ester to optical resolution using chiral diaroyl tartaric acid as an optical resolving agent is provided.

Abstract: Disclosed is a method of preparing D-arginine, wherein D-arginine is obtained by the optical resolution of DL-arginine using D-3-bromocamphor-10-sulfonic acid as an optical resolving agent.

Abstract: This invention relates to a method of preparing D-arginine, and more particularly to a method of preparing D-arginine by optically resolving DL-arginine using D-3-bromocamphor-8-sulfonic acid or a salt thereof as an optical resolving agent.

Abstract: This invention relates to a method of preparing optically active ?-2-thienyl-alanine, and more particularly to a method of preparing optically active ?-2-thienyl-L-alanine or optically active ?-2-thienyl-D-alanine through an optical resolution reaction using chiral dibenzoyl tartaric acid or a derivative thereof as an optical resolving agent.

Abstract: Disclosed is a method of preparing D-arginine, wherein D-arginine is obtained by the optical resolution of DL-arginine using D-3-bromocamphor-10-sulfonic acid as an optical resolving agent.

Abstract: According to the present invention, a method is provided wherein a basic aqueous phase containing an optically active ?-amino acid is brought into contact with an organic phase containing a racemisation catalyst in the form of a copper metal complex of copper ions and an ?-amino acid and salicylaldehyde, in the presence of a phase transition catalyst, thereby subjecting the optically active ?-amino acid to racemisation. In the ?-amino acid racemisation method according to the present invention, the reaction conditions are mild and thus there is little ?-amino acid breakdown and the yield is high, the racemisation catalyst can be reused, the ?-amino acid resulting from the racemisation can easily be isolated and purified, and the racemisation method can be implemented in volume such that the invention is economic.

Abstract: According to the present invention, a method is provided wherein a basic aqueous phase containing an optically active ?-amino acid is brought into contact with an organic phase containing a racemisation catalyst in the form of a copper metal complex of copper ions and an ?-amino acid and salicylaldehyde, in the presence of a phase transition catalyst, thereby subjecting the optically active ?-amino acid to racemisation. In the ?-amino acid racemisation method according to the present invention, the reaction conditions are mild and thus there is little ?-amino acid breakdown and the yield is high, the racemisation catalyst can be reused, the ?-amino acid resulting from the racemisation can easily be isolated and purified, and the racemisation method can be implemented in volume such that the invention is economic.

Abstract: A process for the preparation of L-carnitine using (S)-3-activated hydroxybutyrolactone as a raw material, which is subject to a ring-opening reaction, expoxydation where the chiral center is inversely converted, and nucleophilic substitution of trimethylamine.

Abstract: This invention relates to a process for manufacturing an optically active (S)-3,4-epoxybutyric acid salt and more particularly, to a method for manufacturing (S)-3,4-epoxybutyric acid salt expressed by the following formula 1, wherein an optically active (S)-3-hydroxybutyrolactone is employed to undergo an economical ring-opening reaction and epoxvdation so that its chiral center is maintained in an original form, Wherein, R1 represents alkali metal atom, alkaline earth metal atom, alkylamine group or quarternary amine group.

Abstract: The present invention relates to a process for the preparation of chiral 3,4-epoxybutyric acid expressed by formula (1) and the salt thereof, wherein (S)-3-activated-hydroxybutyrolactone expressed by formula (2) is subjected to a ring-opening reaction to obtain 4-hydroxy-3-activated hydroxybutyric acid expressed by formula (3), which is subjected to an epoxydation with an inversion of the chiral center.