Photographic elements and film units containing imidomethyl blocked photographic reagents

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 imidomethyl blocked photographic reagent having the structure:
• ##STR33## wherein:
• J represents ##STR34## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring;
• R represents hydrogen, alkyl of 1 to 4 carbon atoms or aryl of 6 to 12 carbon atoms;
• and
• PR represents the residue of an organic photographic reagent containing a heteroatom through which it is joined to the imidomethyl blocking group and which, upon unblocking, is capable of reacting with another component of the film unit.

A photographic element comprising a support bearing a photosensitive silver halide emulsion having associated therewith an imidomethyl blocked photographic reagent having the structure:

• ##STR39## wherein:
• J represents ##STR40## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring;
• R represents hydrogen, alkyl of 1 to 4 carbon atoms or aryl of 6 to 12 carbon atoms;
• and
• PR represents the residue of an organic photographic reagent containing a heteroatom through which it is joined to the imidomethyl blocking group and which, upon unblocking, is capable of reacting with another component of the element.

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 imidomethyl blocked photographic reagent having the structure:

• ##STR41## wherein:
• J represents ##STR42## X represents the atoms to complete a heterocyclic nucleus containing at least one 5- or 6-membered ring;
• R represents hydrogen, alkyl of 1 to 4 carbon atoms or aryl of 6 to 12 carbon atoms;
• and
• PR represents the residue of an organic photographic reagent containing a heteroatom through which it is joined to the imidomethyl blocking group and which, upon unblocking, is capable of reacting with another component of the element.