Process for preparation of crystallized monohydrated sodium phen

Details Process for preparation of crystallized monohydrated sodium phen Process for preparation of crystallized monohydrated sodium phen

1984-07-13

1985-05-21

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5984

Patent

active

045188009

ABSTRACT:
The invention concerns a process for preparation of crystallized monohydrated sodium phenylpyruvate comprising: hot reacting benzaldehyde in an aqueous medium in the presence of a catalytic quantity of ethanolamine with the stoichiometric quantity of hydantoin, then treating the reactional medium hot at pH=14 through an excess of sodium hydroxide, acidifying to pH=9 with concentrated hydrochloric acid the so obtained solution and separating the formed precipitate.

REFERENCES:
patent: 3254109 (1966-03-01), Hartle
patent: 3412116 (1968-11-01), Reinheckel et al.
patent: 3855245 (1974-12-01), Koyama et al.
patent: 4042617 (1977-08-01), Kogure et al.
patent: 4334089 (1982-06-01), Kraas et al.
Journal of the Chemical Society Chemical Communications, No. 24, Dec. 20, 1978-Herve des Abbayes et al.
"Double Carbonylation of Substituted Benzyl Chlorides with Cobalt Carbonyl Anion by Phase Transfer Catalysis to Give Arylpyruvic Acids", pp. 1090-1091.

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