1-hydroxypyrazole-4-carboxylic acid

Details 1-hydroxypyrazole-4-carboxylic acid 1-hydroxypyrazole-4-carboxylic acid

1986-08-29

1988-09-06

Lee, Mary

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23114

Patent

active

047694734

ABSTRACT:
1-Hydroxypyrazole-4-carboxylic acid is prepared by heating an alkali metal of alkaline earth metal salt of 1-hydroxypyrazole, or a mixture of 1-hydroxypyrazole with an alkali metal or alkaline earth metal carbonate or bicarbonate, at from 120.degree. to 250.degree. C. for from 1 to 40 hours under a CO.sub.2 pressure of 20-300 bar, and is used for the preparation of pharmacologically useful compounds.

REFERENCES:
patent: 4350819 (1982-09-01), Rieber et al.

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