Chromogenic dicyanomethylenepyrazolinones

Details Chromogenic dicyanomethylenepyrazolinones Chromogenic dicyanomethylenepyrazolinones

1990-01-19

1990-08-21

Ramsuer, Robert W.

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

Organic compounds

Chalcogen in the nitrogen containing substituent

544 586, 544 587, 544131, 544139, 544140, 544364, 544370, 544371, 546194, 546210, 546211, 546279, 548336, 548364, C07D40104, C07D41714

Patent

active

049507540

ABSTRACT:
Chromogenic dicyanomethylenepyrazolinone for thermographic recording processes and the corresponding cyanomethylene dyes of the formula ##STR1## in which R is hydrogen, hydroxyl, amino, alkyl, cycloalkyl, aryl, aralkyl or a heterocylic radical, T.sub.1 and T.sub.2, independently of one another, are each hydrogen, unsubstituted or halogen-, hydroxyl-, cyano- or lower alkoxy-substituted alkyl having a maximum of 12 carbon atoms, cycloalkyl having 5 to 10 carbon atoms or unsubstituted or halogen-, cyano-, lower alkyl- or lower alkoxy-(ring)substituted phenalkyl or phenyl, or T.sub.1 and T.sub.2 together with the nitrogen linking them are a five- or six-membered heterocyclic radical, and rings A and B, independently of one another, are unsubstituted or substituted by halogen, cyano, nitro, lower alkyl, lower alkoxy, (lower alkyl)carbonyl or (lower alkoxy)carbonyl.

REFERENCES:
patent: 2165445 (1939-07-01), Boese, Jr.

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