Pyrazolonoxonol compounds

Details Pyrazolonoxonol compounds Pyrazolonoxonol compounds

1995-01-27

1996-09-17

Ramsuer, Robert W.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544 82, C07D23120

Patent

active

055569854

ABSTRACT:
A novel pyrazolonoxonol compound represented by formula (A) and a silver halide photographic material comprising such a pyrazolonoxonol compound: ##STR1## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an alkyl group or an aryl group, and the alkyl groups represented by R.sub.1 and R.sub.2 may bond each other to form a saturated 5- or 6-membered ring; R.sub.3 represents a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, a hydroxyl group, an alkoxy group, a carboxyl group, an ester group, a carbamoyl group, an amino group, an acylamino group, an ureide group, an urethane group or a cyano group; L.sub.1, L.sub.2, L.sub.3, L.sub.4 and L.sub.5 each represents a methine group, and the methine groups which are not adjacent to each other may bond each other to form a 5- or 6-membered ring; M represents a hydrogen atom or a monovalent cation; and m and n each represent an integer 0 or 1.

REFERENCES:
patent: 2274782 (1942-03-01), Gaspar
patent: 2439098 (1948-04-01), Porter et al.

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