Oxidative release of photographically useful groups from hydrazide compounds

Claim 2

A photographic element comprising a support having thereon a silver halide emulsion layer having associated therewith a compound containing a hydrazide moiety attached by a linking group, comprising an acidic group or an active methylene group adjacent to an acidic group, to a heteroatom of a moiety containing a photographically useful group comprising a photographic dye or precursor thereof or a photographic reagent; wherein: (a) said hydrazide moiety is capable of being oxidized to an azo group by an oxidized developing agent, (b) said azo group formation causes the release of said photographically useful group, and (c) said released photographically useful group does not contain said linking group or the nitrogen atoms of said hydrazide moiety.

Claim 3

The element of claim 1 wherein said photographically useful group is released by alkaline hydrolysis, beta-elimination or intramolecular nucleophilic displacement.

Claim 4

The element of claim 1 wherein said compound has the formula: ##STR44## wherein: R represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; V represents an acidic group; each W independently represents --NO 2 , --CN, --COOH, --SO 3 H, or --V--NR; X represents O, S, or NR 1 ; Y represents a bond or X; each Z independently represents --T m --PUG, having a heteroatom at its point of attachment; T represents a divalent connecting group or a timing group; PUG represents a photographically useful group; R 1 represents H or R; and n and m each independently represents 0 or 1.

Claim 5

The element of claim 3 wherein said Z is attached 1 or 2 atoms removed from the hydrazide moiety.

Claim 6

The element of claim 3 wherein said photographic reagent is a development inhibitor, a development accelerator, a bleach inhibitor, a bleach accelerator, a coupler, a developing agent, a silver complexing agent, a fixing agent, a toning agent, a hardening agent, a tanning agent, a fogging agent, an antifogging agent, a spectral sensitizing agent, a chemical sensitizing agent, or a desensitizing agent.

Claim 7

The element of claim 5 wherein said photographic reagent is a development inhibitor.

Claim 8

The element of claim 3 wherein said acidic group is ##STR45##

Claim 9

A photographic element comprising a support having thereon at least one red-sensitive silver halide emulsion layer having associated therewith a cyan dye-providing material, at least one green-sensitive silver halide emulsion layer having associated therewith a magenta dye-providing material, and at least one blue-sensitive silver halide emulsion layer having associated therewith a yellow dye-providing material, at least one of said emulsion layers also having associated therewith a compound containing a hydrazide moiety attached by a linking group, comprising an acidic group or an active methylene group adjacent to an acidic group, to a heteroatom of a moiety containing a photographic reagent; wherein: (a) said hydrazide moiety is capable of being oxidized to an azo group by an oxidized developing agent, (b) said azo group formation causes the release of said photographic reagent, and (c) said released photographic reagent does not contain said linking group or the nitrogen atoms of said hydrazide moiety.

Claim 10

A photographic element comprising a support having thereon at least one red-sensitive silver halide emulsion layer having associated therewith a cyan dye-providing material, at least one green-sensitive silver halide emulsion layer having associated therewith a magenta dye-providing material, and at least one blue-sensitive silver halide emulsion layer having associated therewith a yellow dye-providing material, at least one of said emulsion layers also having associated therewith a compound containing a hydrazide moiety attached by a linking group, comprising an acidic group or an active methylene group adjacent to an acidic group, to a heteroatom of a moiety containing a photographic reagent; wherein: (a) said hydrazide moiety is capable of being oxidized to an azo group by an oxidized developing agent, (b) said azo group formation causes the release of said photographic reagent, and (c) said released photographic reagent does not contain said linking group or the nitrogen atoms of said hydrazide moiety.

Claim 11

The element of claim 8 wherein said compound has the formula: ##STR46## wherein: R represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; V represents an acidic group; each W independently represents --NO 2 , --CN, --COOH, --SO 3 H, or --V--YR; X represents O, S, or NR 1 ; Y represents a bond or X; each Z independently represents --T m --PUG, having a heteroatom at its point of attachment; T represents a divalent connecting group or a timing group; PUG represents a photographically useful group; R 1 represents H or R; and n and m each independently represents 0 or 1.

Claim 12

The element of claim 9 wherein said Z is attached 1 or 2 atoms removed from the hydrazide moiety.

Claim 13

The element of claim 9 wherein said photographic reagent is a development inhibitor, a development accelerator, a bleach inhibitor, a bleach accelerator, a coupler, a developing agent, a silver complexing agent, a fixing agent, a toning agent, a hardening agent, a tanning agent, a fogging agent, an antifogging agent, a spectral sensitizing agent, a chemical sensitizing agent, or a desensitizing agent.

Claim 14

The element of claim 11 wherein said photographic reagent is a development inhibitor.

Claim 15

The element of claim 9 wherein said acidic group is ##STR47##

Claim 16

A process comprising: (a) exposing a photographic element comprising a support having thereon a silver halide emulsion layer having associated therewith a compound containing a hydrazide moiety attached by a linking group, comprising an acidic group or an active methylene group adjacent to an acidic group, to a heteroatom of a moiety containing a photographically useful group comprising a photographic dye or precursor thereof or a photographic reagent; (b) developing said exposed element with a silver halide developing agent, thereby oxidizing said developing agent; and (c) said hydrazide moiety then being oxidized in an imagewise manner to an azo group by said oxidized developing agent; whereby said azo group formation causes the release of said photographically useful group which does not contain said linking group or the nitrogen atoms of said hydrazide moiety.

Claim 17

A process comprising: (a) exposing a photographic element comprising a support having thereon a silver halide emulsion layer having associated therewith a compound containing a hydrazide moiety attached by a linking group, comprising an acidic group or an active methylene group adjacent to an acidic group, to a heteroatom of a moiety containing a photographically useful group comprising a photographic dye or precursor thereof or a photographic reagent; (b) developing said exposed element with a silver halide developing agent, thereby oxidizing said developing agent; and (c) said hydrazide moiety then being oxidized in an imagewise manner to an azo group by said oxidized developing agent; whereby said azo group formation causes the release of said photographically useful group which does not contain said linking group or the nitrogen atoms of said hydrazide moiety.

Claim 18

The process of claim 14 wherein said photographically useful group is released by alkaline hydrolysis, beta-elimination or intramolecular nucleophilic displacement.

Claim 19

The process of claim 14 wherein said compound has the formula: ##STR48## wherein: R represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; V represents an acidic group; each W independently represents --NO 2 , --CN, --COOH, --SO 3 H, or --V--YR; X represents O, S, or NR 1 ; Y represents a bond or X; each Z independently represents --T m --PUG, having a heteroatom at its point of attachment; T represents a divalent connecting group or a timing group; PUG represents a photographically useful group; R 1 represents H or R; and n and m each independently represents 0 or 1.

Claim 20

The process of claim 16 wherein said Z is attached 1 or 2 atoms removed from the hydrazide moiety.

Claim 21

The process of claim 16 wherein said photographic reagent is a development inhibitor, a development accelerator, a bleach inhibitor, a bleach accelerator, a coupler, a developing agent, a silver complexing agent, a fixing agent, a toning agent, a hardening agent, a tanning agent, a fogging agent, an antifogging agent, a spectral sensitizing agent, a chemical sensitizing agent, or a desensitizing agent.

Claim 22

The process of claim 18 wherein said photographic reagent is a development inhibitor.

Claim 23

The process of claim 16 wherein said acidic group is ##STR49##