Process for preparing optically active amino acid or mandelic ac

Details Process for preparing optically active amino acid or mandelic ac Process for preparing optically active amino acid or mandelic ac

1979-04-24

1980-09-23

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26050112, 562401, 562402, C07C10104, C07C10108, C07B 1900

Patent

active

042242398

ABSTRACT:
Two optically active amino acid-mandelic acid complexes are obtained by interacting 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 diastereoisomers by using solubility difference therebetween. The optically active complexes are each decomposed by means of an acid, a strongly acidic ion-exchange resin, or a weakly basis ion-exchange resin to obtain optically active amino acids or optically active mandelic acid.

REFERENCES:
patent: 2820827 (1958-01-01), Ruschig et al.
patent: 3897484 (1975-07-01), Asai et al.
patent: 3976680 (1976-08-01), Clark et al.

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