3-Trifluoromethyl-4-aryl-5-aminopyrazoles

Details 3-Trifluoromethyl-4-aryl-5-aminopyrazoles 3-Trifluoromethyl-4-aryl-5-aminopyrazoles

1977-08-31

1978-10-24

Trousof, Natalie

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

260162, 260163, 260465G, C07D23138

Patent

active

041222784

ABSTRACT:
Azopyrazolium dyes of the formula: ##STR1## in which R.sub.1 represents an alkyl group or a phenyl group which may be substituted with a halogen atom or with a nitro, alkoxy or alkyl group; R.sub.2 represents an alkyl group; R.sub.3 represents an atom of hydrogen or halogen; R.sub.4 represents the residue of a coupler R.sub.4 H free of a sulfonic or carboxylic group; and X.sup.- represents a monovalent anion, and 3-trifluoromethyl-4-aryl-5-amino pyrazoles of the formula ##STR2## in which R.sub.3 and R.sub.4 have the same meanings as above and R'.sub.1 represents a hydrogen atom, an alkyl group, or a phenyl group which may be substituted with a halogen atom or with a nitro, alkoxy or alkyl group, are disclosed; methods are disclosed for making these compounds and using them, e.g., for using the pyrazoles to form the dyes.

REFERENCES:
patent: 2998425 (1961-08-01), Dickinson, Jr. et al.
patent: 3041342 (1962-06-01), Tucker et al.
patent: 3261844 (1966-07-01), Trofimenko
patent: 3927025 (1975-12-01), Korbonits et al.

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