Process for preparing 1-phenyl-3-aminopyrazoles

Details Process for preparing 1-phenyl-3-aminopyrazoles Process for preparing 1-phenyl-3-aminopyrazoles

1977-06-24

1979-04-10

Trousof, Natalie

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

260162, C07D23138

Patent

active

041490053

ABSTRACT:
1-PHENYL-3-AMINO-2-PYRAZOLINES ARE CATALYTICALLY OXIDIZED TO 1-PHENYL-3-AMINOPYRAZOLES, USING OXYGEN AND/OR AIR AS THE OXIDIZING AGENT AND IN THE PRESENCE OF COPPER SALTS, OPTIONALLY ASSOCIATED WITH METALLIC COPPER AND/OR AN AROMATIC, HETEROCYCLIC ORGANIC BASE SELECTED FROM N-dialkyl anilines, pyridines, piperidine, and ethanolamine, or equivalents thereof, in an inert reaction medium and at a temperature of from about 20.degree. C. to about 40.degree. C.

REFERENCES:
Elderfield, Heterocyclic Compounds, vol. 5, pp. 108-109, N.Y., Wiley, 1957.
Fusco, Pyrazoles, in: Pyrazoles, Pyrazolines, Pyrazolidenes, Indazoles and Condensed Rings, pp. 41-45, N.Y. Interscience, 1967.

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