Preparation of imidazole-4(5)-monocarboxylic acids and their sal

Details Preparation of imidazole-4(5)-monocarboxylic acids and their sal Preparation of imidazole-4(5)-monocarboxylic acids and their sal

1985-07-24

1987-06-09

Schwartz, Richard A.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23390

Patent

active

046721282

ABSTRACT:
Imidazole-4(5)-monocarboxylic acids and their salts or betaines are prepared by reacting an imidazole with carbon dioxide and an alkali metal carbonate, an alkali metal bicarbonate and/or an alkali metal hydroxide at from 140.degree. to 230.degree. C. and under from 2 to 350 bar and, if desired, then reacting the product with an acid.
The imidazole-4(5)-monocarboxylic acids which can be prepared by the process of the invention are useful starting materials for the preparation of dyes, crop protection agents and drugs.

REFERENCES:
patent: 3023210 (1962-02-01), Schutt
F. L. Pymann, J. Chem. Soc., 109 (1916), 186-202.
W. Hubball and F. L. Pymann, J. Chem. Soc., 131 (1928), 21-32.
R. Weidenhagen and H. Wegner, Ber. 70 (1937), 2309.
R. G. Fargher and F. L. Pymann, J. Chem. Soc., 115 (1919), 217.
CA 90: 72,189z (1979).
CA 98: 179,384b (1983).

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