Optically active amino acid-mandelic acid complexes

Details Optically active amino acid-mandelic acid complexes Optically active amino acid-mandelic acid complexes

1978-03-15

1980-04-15

Helfin, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562401, 562402, 562559, 562575, C07C 65135

Patent

active

041985249

ABSTRACT:
Two optically active amino acid-mandelic acid complexes are obtained by reacting in a solvent under pH conditions of 1.0-4.0, an amino acid expressed by a general formula ##STR1## (in which R represents a methyl group, an ethyl group or a methylthioethyl group) and mandelic acid, one of the acids being an optically active substance and the other being a racemic modification, and optically resolving the resulting complexes into two diastereomers by using a solubility difference therebetween. The optically active complexes are each decomposed by means of an acid, a strongly acidic ion-exchange resin, or a weakly basic ion-exchange resin to obtain optically active amino acids or optically active mandelic acid.

REFERENCES:
patent: 3897484 (1975-07-01), Asai et al.
patent: 3976680 (1976-08-01), Clark et al.

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