Process for preparing an optically active p-hydroxyphenylglycine

Details Process for preparing an optically active p-hydroxyphenylglycine Process for preparing an optically active p-hydroxyphenylglycine

1982-06-28

1984-02-28

Reamer, James H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

562401, C07C14330, C07C10172

Patent

active

044341075

ABSTRACT:
The present invention relates to the optical resolution of a p-hydroxyphenylglycine salt with simultaneous racemization of the undesired enantiomer thereof. The invention is carried out by preferential crystallizing out the desired enantiomer from a supersaturated solution of the racemic modification thereof in a lower aliphatic acid in the presence of an aliphatic or aromatic aldehyde.

REFERENCES:
patent: 3994962 (1976-11-01), Shirai et al.
patent: 4309362 (1982-01-01), Chibata et al.

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