Dyestuffs and their use in photographic material

Details Dyestuffs and their use in photographic material Dyestuffs and their use in photographic material

1983-04-22

1984-11-13

Shaver, Paul F.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546184, 546279, 546348, C07D40100, C07D21100, C07D29500

Patent

active

044827164

ABSTRACT:
The new compounds of the general formula ##STR1## where R.sub.1 is hydrogen, alkyl or cyclic alkyl, R.sub.2 and R.sub.3 are each hydrogen, alkyl, a carboxylic acid, ester or amide group or cyano, and R.sub.4, R.sub.5 and R.sub.6 are each alkyl or aryl, are useful as antihalation dyes and as image dyes in photographic materials for dye-bleaching processes.

REFERENCES:
patent: 2506654 (1980-05-01), Stein
patent: 3686171 (1972-08-01), Swett et al.
patent: 4021428 (1977-05-01), Farutachi et al.

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