US4338393A — Heterocyclic magenta dye-forming couplers

Claim 1

Independent Claim 117 words

A photographic element comprising a support and a photosensitive silver halide emulsion having associated therewith a nondiffusible magenta dye-forming coupler of the formula: ##STR9## wherein A represents the atoms necessary to complete, with the nitrogen atom to which it is attached, a ballasted pyrazolotriazole, pyrazolobenzimidazole or indazolin-3-one magenta dye-forming coupler moiety whose coupling position is inactivated by the --CHR 1 R 2 group; CHR 1 R 2 is a blocking group which, upon reaction with oxidized color developing agent, is detached from the magenta dye-forming coupler moiety to yield a mobile reaction product; R 1 is alkyl--O--CO--, alkyl--C0--, aryl--O--CO--, aryl--C0--, --COOH, --NO 2 or --CN; and R 2 is a group specified for R 1 or aryl--NHCO--.

Claim 2

Dependent Claim 117 words

A photographic element comprising a support and a photosensitive silver halide emulsion having associated therewith a nondiffusible magenta dye-forming coupler of the formula: ##STR9## wherein A represents the atoms necessary to complete, with the nitrogen atom to which it is attached, a ballasted pyrazolotriazole, pyrazolobenzimidazole or indazolin-3-one magenta dye-forming coupler moiety whose coupling position is inactivated by the --CHR 1 R 2 group; CHR 1 R 2 is a blocking group which, upon reaction with oxidized color developing agent, is detached from the magenta dye-forming coupler moiety to yield a mobile reaction product; R 1 is alkyl--O--CO--, alkyl--C0--, aryl--O--CO--, aryl--C0--, --COOH, --NO 2 or --CN; and R 2 is a group specified for R 1 or aryl--NHCO--.

Claim 3

Dependent Claim 32 words

A photographic element of claim 1 wherein at least one of R 1 and R 2 contains an alkyl or aryl group substituted with one or more carboxy, sulfo or hydroxy groups.

Claim 4

Dependent Claim 17 words

A photographic element of claims 1 or 2 wherein A completes a pyrazolotriazole magenta dye-forming coupler moiety.

Claim 5

Dependent Claim 75 words

A photographic element of claim 1 in which A completes a magenta dye-forming coupler moiety having one of the following formulae, in which the unsatisfied bond is the point of attachment of the --CHR 1 R 2 group: ##STR10## wherein: R 3 and each R 4 are independently alkyl, aryl, heterocyclyl, amino, acylamido, hydroxy, alkoxy, alkylthio, carboxy or esterified carboxy, R 5 is hydrogen or a coupling-off group; and n is 0, 1 or 2.

Claim 6

Dependent Claim 17 words

A photographic element of claim 1 wherein the magenta dye-forming coupler has one of the structures: ##STR11##

Claim 7

Dependent Claim 142 words

A process of forming a magenta dye image in a photographic element comprising a support and an imagewise exposed silver halide emulsion, comprising the step of developing the element with a developer composition containing a color developing agent in the presence of a magenta dye-forming coupler having the structure: ##STR12## wherein: A represents the atoms necessary to complete, with the nitrogen atom to which it is attached, a pyrazolotriazole, pyrazolobenzimidazole or indazolin-3-one magenta dye-forming coupler moiety whose coupling position is inactivated by the --CHR 1 R 2 group; CHR 1 R 2 is a blocking group which, upon reaction with oxidized color developing agent, is detached from the magenta dye-forming coupler moiety to yield a mobile reaction product; R 1 is alkyl---O--CO--, alkyl--CO--, aryl--O--CO--, aryl--CO--, --COOH, --NO 2 or --CN; and R 2 is a group specified for R 1 or aryl--NHCO--.

Claim 8

Dependent Claim 142 words

A process of forming a magenta dye image in a photographic element comprising a support and an imagewise exposed silver halide emulsion, comprising the step of developing the element with a developer composition containing a color developing agent in the presence of a magenta dye-forming coupler having the structure: ##STR12## wherein: A represents the atoms necessary to complete, with the nitrogen atom to which it is attached, a pyrazolotriazole, pyrazolobenzimidazole or indazolin-3-one magenta dye-forming coupler moiety whose coupling position is inactivated by the --CHR 1 R 2 group; CHR 1 R 2 is a blocking group which, upon reaction with oxidized color developing agent, is detached from the magenta dye-forming coupler moiety to yield a mobile reaction product; R 1 is alkyl---O--CO--, alkyl--CO--, aryl--O--CO--, aryl--CO--, --COOH, --NO 2 or --CN; and R 2 is a group specified for R 1 or aryl--NHCO--.

Claim 9

Dependent Claim 17 words

A process of claim 6 wherein the coupler is nondiffusible and is initially present in the element.

Claim 10

Dependent Claim 18 words

A process of claim 6 wherein the coupler is diffusible and is initially present in the developer composition.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1985-07-05	1986-01-04	1986-07-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1989-07-05	1990-01-04	1990-07-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1993-07-05	1994-01-04	1994-07-06	$7700.00	Window Closed / Lapsed

Heterocyclic magenta dye-forming couplers

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