Aryloxy substituted photographic couplers and photographic...

G - Physics – 03 – C

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G03C 1/42 (2006.01) G03C 7/305 (2006.01)

Patent

CA 1190930

Abstract of the Disclosure: Couplers of good reactivity contain an aryloxy couping-off group having in an ortho posi- tion a polarizable carbonyl, sulfonyl or phosphinyl sustituent group which is free of photographic dye groups and photographic reagent groups. Such novel dye-forming couplers have the structural formula: Image where: COUP represents a dye-forming coupler moiety substituted in its coupling position with the remainder of the structure; X represents the atoms to complete a phenyl nucleus free of groups which are capable of under- going coupling; R is hydrogen or one or more substituents selected from the group consisting of halogen, alkyl, alkoxy, nitro, cyano, carboxy, alkoxycarbonyl, aryloxycarbonyl, alkylsulfonyl, arylsulfonyl, amindo, carbamoyl, sulfonamido and sulfamoyl; R' is hydrogen or alkyl of 1 to 4 carbon atoms; m is 0 to 4; and A is a moiety containing a polarizable carbonyl, sulfonyl or phosphinyl group free of photographic dye groups and photographic reagent groups which are released during photographic processing.

411819

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