Photographic development inhibitor (1H- or 2H-) indazolyl hydroq

Details Photographic development inhibitor (1H- or 2H-) indazolyl hydroq Photographic development inhibitor (1H- or 2H-) indazolyl hydroq

1982-06-03

1985-02-26

Jiles, Henry R.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548251, 548300, 548348, 548371, G03C 700, G03C 140, C07D23156

Patent

active

045018987

ABSTRACT:
A photographic development inhibitor releasing compound of the formula (I): ##STR1## wherein X is an indazole residue which may be substituted and which is bonded to the benzene nucleus through the nitrogen atom at the 1-position or 2-position thereof; R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, are each hydrogen, an alkyl group, an aryl group, an alkylthio group, an arylthio group, a halogen atom, a hydrogen group, an alkoxy group, an aryloxy group, an acyl group, an alkoxycarbonyl group, an amido group, a sulfonamido group, a carbamoyl group, a sulfamoyl group, a heterocyclic residue or any of the groups described above for X; further R.sup.2 and R.sup.3 may combine with each other to form a ring; and R.sup.4 and R.sup.5, which may be the same or different, are each hydrogen or a group capable of being hydrolyzed in the presence of an alkali. The compound is very active and rapidly releases a development inhibiting agent upon oxidation. However, it is stable when it is incorporated into a silver halide emulsion layer and can be advantageously used in a photographic light-sensitive material.

REFERENCES:
patent: 3379529 (1968-04-01), Porter et al.
patent: 3833606 (1974-09-01), Mohan
patent: 4308336 (1981-12-01), Waki et al.

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