Method for the optical resolution of DL-.alpha.phenylglycine

Details Method for the optical resolution of DL-.alpha.phenylglycine Method for the optical resolution of DL-.alpha.phenylglycine

1972-12-11

1976-01-20

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260518R, 2602391, C07C14326

Patent

active

039339025

ABSTRACT:
A method for obtaining an optically active .alpha.-phenylglycine benzenesulfonate by optical resolutions which comprises dissolving DL-.alpha.-phenylglycine benzenesulfonate in an aqueous solution of benzenesulfonic acid, cooling the resulting solution to a temperature sufficient to render the solution supersaturated, selectively crystallizing either optically active D- or L-.alpha.-phenylglycine benzenesulfonate in the presence of a seed of either D- or L-.alpha.-phenylglycine benzenesulfonate corresponding to the optically active .alpha.-phenylglycine benzenesulfonate to be crystallized out, and separating the resulting crystals from the liquid phase is disclosed.

REFERENCES:
patent: 3646082 (1972-02-01), Ito et al.
Santhaman, Chemical Abstracts, Vol. 74, (1971), Col. 42616.

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