Blocked photographic reagents

Claim 2

A photographic image transfer film unit comprising: (a) a photosensitive element comprising a support bearing a layer of a silver halide emulsion having associated therewith a dye-image-providing material, and (b) a dye image-receiving layer, the film unit containing an α-ketoimidomethyl blocked photographic reagent having the structure: ##STR13## wherein: J represents ##STR14## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 3

A photographic image transfer film unit comprising (a) a photosensitive element comprising a support having thereon a red-sensitive silver halide emulsion unit having associated therewith a cyan-dye-image-providing material, a green-sensitive silver halide emulsion unit having associated therewith a magenta-dye-image-providing material and a blue-sensitive silver halide emulsion unit having associated therewith a yellow-dye-image-providing material; and (b) a dye-image-receiving layer; the film unit containing an α-ketoimidomethyl blocked photographic reagent having the structure: ##STR15## wherein: J represents ##STR16## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 4

A photographic image transfer film unit comprising (a) a photosensitive element comprising a support having thereon a red-sensitive silver halide emulsion unit having associated therewith a cyan-dye-image-providing material, a green-sensitive silver halide emulsion unit having associated therewith a magenta-dye-image-providing material and a blue-sensitive silver halide emulsion unit having associated therewith a yellow-dye-image-providing material; and (b) a dye-image-receiving layer; the film unit containing an α-ketoimidomethyl blocked photographic reagent having the structure: ##STR15## wherein: J represents ##STR16## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 5

A film unit of claim 2 further comprising an alkaline processing composition and means containing same for discharge of the alkaline processing composition within the film unit.

Claim 6

A film unit of claim 3 wherein the blocked photographic reagent is in or adjacent a silver halide emulsion layer.

Claim 7

A film unit of claim 3 further comprising a transparent cover sheet on the opposite side of the silver halide emulsion layers from the dye image receiving layer, and the means containing the alkaline processing composition being positioned for discharge of the alkaline processing composition between the cover sheet and the silver halide emulsion layers.

Claim 8

A film unit of claim 5 wherein the cover sheet comprises a transparent support bearing, in order, a neutralizing layer and a timing layer.

Claim 9

A film unit of claim 6 wherein the blocked photographic reagent is in a timing layer of the cover sheet.

Claim 10

A film unit of claim 2 wherein the dye-image-providing materials are redox dye-releasing compounds.

Claim 11

A film unit of claim 8 wherein the silver halide emulsions are direct positive emulsions and the redox dye releasing compounds are negative-working.

Claim 12

A film unit of claim 8 wherein the silver halide emulsions are negative emulsions and the redox dye-releasing compounds are positive-working.

Claim 13

A film unit of one of claims 1 through 10 wherein the α-ketoimidomethyl blocked photographic reagent has one of the structures: ##STR17## wherein: R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group; and Y is hydrogen or one or more substituents selected from the group consisting of halogen, nitro, alkyl, aryl, alkenyl, alkoxy, aryloxy, alkenyloxy, alkylcarbonyl, arylcarbonyl, alkenylcarbonyl, alkylsulfonyl, arylsulfonyl, alkenylsulfonyl, amino, aminocarbonyl, aminosulfonyl, carboxy, alkoxycarbonyl, aryloxycarbonyl and alkenyloxycarbonyl.

Claim 14

A film unit of any one of claims 1 through 10 wherein the α-ketoimidomethyl blocked photographic reagent has the structure: ##STR18## wherein: R represents aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 15

A photographic element comprising a support bearing a photosensitive silver halide emulsion having associated therewith an α-ketoimidomethyl blocked photographic reagent having the structure: ##STR19## wherein: J represents ##STR20## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 16

A photographic element comprising a support bearing a photosensitive silver halide emulsion having associated therewith an α-ketoimidomethyl blocked photographic reagent having the structure: ##STR19## wherein: J represents ##STR20## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 17

A photographic element comprising a support having thereon a red-sensitive silver halide emulsion unit having associated therewith a cyan-dye-image-providing material, a green-sensitive silver halide emulsion unit having associated therewith a magenta-dye-image-providing material and a blue-sensitive silver halide emulsion unit having associated therewith a yellow-dye-image providing material, there being associated with at least one of the silver halide emulsion units an α-ketoimidomethyl blocked photographic reagent having the structure: ##STR21## wherein: J represents ##STR22## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 18

A photographic element comprising a support having thereon a red-sensitive silver halide emulsion unit having associated therewith a cyan-dye-image-providing material, a green-sensitive silver halide emulsion unit having associated therewith a magenta-dye-image-providing material and a blue-sensitive silver halide emulsion unit having associated therewith a yellow-dye-image providing material, there being associated with at least one of the silver halide emulsion units an α-ketoimidomethyl blocked photographic reagent having the structure: ##STR21## wherein: J represents ##STR22## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 19

A photographic element of any one of claims 13 or 14 wherein the α-ketoimidomethyl blocked photographic reagent has one of the structures: ##STR23## wherein: R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group; and Y is hydrogen or one or more substituents selected from the group consisting of halogen, nitro, alkyl, aryl, alkenyl, alkoxy, aryloxy, alkenyloxy, alkylcarbonyl, arylcarbonyl, alkenylcarbonyl, alkylsulfonyl, arylsulfonyl, alkenylsulfonyl, amino, aminocarbonyl, aminosulfonyl, carboxy, alkoxycarbonyl, aryloxycarbonyl and alkenyloxycarbonyl.

Claim 20

A photographic element of any one of claims 13 or 14 wherein the α-ketoimidomethyl blocked photographic reagent has the structure: ##STR24## wherein: R represents aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 21

An image transfer cover sheet element capable of being permeated by an alkaline processing composition, comprising a support having thereon a neutralizing layer and a timing layer, the element containing an α-ketoimidomethyl blocked photographic reagent having the structure: ##STR25## wherein: J represents ##STR26## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 22

An image transfer cover sheet element capable of being permeated by an alkaline processing composition, comprising a support having thereon a neutralizing layer and a timing layer, the element containing an α-ketoimidomethyl blocked photographic reagent having the structure: ##STR25## wherein: J represents ##STR26## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 23

A cover sheet element of claim 17 wherein the α-ketoimidomethyl blocked photographic reagent has one of the structures: ##STR27## wherein: R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group; and Y is hydrogen or one or more substituents selected from the group consisting of halogen, nitro, alkyl, aryl, alkenyl, alkoxy, aryloxy, alkenyloxy, alkylcarbonyl, arylcarbonyl, alkenylcarbonyl, alkylsulfonyl, arylsulfonyl, alkenylsulfonyl, amino, aminocarbonyl, aminosulfonyl, carboxy, alkoxycarbonyl, aryloxycarbonyl and alkenyloxycarbonyl.

Claim 24

A cover sheet element of claim 17 wherein the α-ketoimidomethyl blocked photographic reagent has the structure: ##STR28## wherein: R represents aryl of 6 to 30 carbon atoms; and PR represents the residue of a development inhibitor containing a sulfur or nitrogen atom through which it is joined to the α-ketoimidomethyl blocking group.

Claim 25

A cover sheet element of any one of claims 17, 18 or 19 further comprising a dye image receiving layer.

Claim 26

A process of forming a photographic image in an imagewise exposed element of any one of claims 1, 2, 13 or 14 comprising contacting the element with an alkaline processing composition to effect development of developable silver halide and to unblock the blocked photographic reagent.