Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1988-08-03
1990-08-21
Shah, Mukund J.
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430384, 430558, G03C 716
Patent
active
049505858
ABSTRACT:
A novel cyan color-forming coupler for photographic use is disclosed. The coupler has a improved fastness for heat, humidity, and has a chemical structure represented by the following Formula I; ##STR1## wherein Z is a group of non-metal atoms necessary for completing a nitrogen-containing six-member heterocyclic ring condensed with the pyrazole ring. The six-member ring may be substituted or not substituted provided that the six-member ring does not have be condensed with any ring other than the pyrazole ring; R represents a hydrogen atom or a substituent, and X represents a hydrogen atom or a substituent capable of being split off upon reaction with the oxidized product of a color developing agent.
REFERENCES:
patent: 3171740 (1965-03-01), Menzel et al.
patent: 4639415 (1987-01-01), Kaneko et al.
patent: 4828969 (1989-05-01), Takada et al.
Auzzi et al., "2-Phenylpyrazolo [1,5-a]pyrimidin-7-Ones", J. Med. Chem. 1983, 26, 1706-1709.
Chu et al., "Ring Transformation Reactions of C-Nucleosides", J. Het. Chem. 1986, 23(1) pp. 349-352.
Derwent Japanese Patent Report, week R25 8/5/70, p. 4, Section B, No. 44709R.
Kaneko Yutaka
Tachibana Kimie
Bierman Jordan B.
Cseh C. L.
Konica Corporation
Shah Mukund J.
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