Process for the separation of the racemate (R,S)-cysteine

Details Process for the separation of the racemate (R,S)-cysteine Process for the separation of the racemate (R,S)-cysteine

1983-01-25

1984-02-07

Trousof, Natalie

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

Organic compounds

Carboxylic acids and salts thereof

548201, 562557, C07B 1900

Patent

active

044305095

ABSTRACT:
To separate the racemate (R,S)-cysteine, the racemate is condensed in an inert solvent with an enantiomerically enantiomeric monosaccharide of the group of aldoses having 4 to 7 carbon atoms to form the corresponding 2-substituted thiazolidin-4-carboxylic acid and the mixture of diastereomers obtained separated from each other. Subsequently, the isolated unitary diastereomers are reacted in an inert solvent with a carbonyl reagent to split the ring and the enantiomerically pure cysteine in each case is isolated as such or as the corresponding cystine.

REFERENCES:
patent: 3808268 (1974-04-01), Bambacher et al.
Angewandte Chemie, vol. 93, p. 680, (and English Translation), Aug. 1981.

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