Process for the preparation of hydantoin precursor of phenylalan

Details Process for the preparation of hydantoin precursor of phenylalan Process for the preparation of hydantoin precursor of phenylalan

1983-11-16

1985-10-22

Schwartz, Richard A.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

562443, C07D23374

Patent

active

045490287

ABSTRACT:
A precursor of phenylalanine containing as a major component 5-benzylhydantoin is prepared by reacting, in an aqueous medium, a bisulfite addition salt of phenylacetaldehyde with cyanide and carbonate ions, each being in a molar ratio of equimol or more to said bisulfite addition salt and ammonium ion in a molar ratio of 2 or more to said carbonate ion.
The thus prepared precursor of phenylalanine may be converted into phenylalanine by a hydrolysis under a basic or acidic condition.

REFERENCES:
patent: 3752821 (1973-08-01), Wollner et al.
Roger Gaudry, Can. J. Res., 26 (B), 773-776 (1948).

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