Release compounds and photographic emulsions, elements and processes utilizing them

Claim 2

A photographic element comprising a support, at least one photosensitive silver halide emulsion layer and a photographic coupler containing a timing group which is cleaved from the coupler as a result of reaction of the coupler with oxidized color developing agent and thereafter undergoes an intramolecular nucleophilic displacement reaction to make available a photographically useful group.

Claim 3

A photographic element comprising a support, at least one photosensitive silver halide emulsion layer and a photographic coupler containing a timing group between a coupler moiety and a photographically useful group, the coupler moiety being joined to the timing group and the timing group being Joined to the photographically useful group so that upon reaction of the coupler with oxidized color developing agent, the timing group and the photographically useful group are released as a unit from the coupler moiety and thereafter the photographically useful group is released from the timing group by an intramolecular nucleophillic displacement reaction.

Claim 4

A photographic element comprising a support, at least one photosensitive silver halide emulsion layer and a photographic coupler containing a timing group between a coupler moiety and a photographically useful group, the coupler moiety being joined to the timing group and the timing group being Joined to the photographically useful group so that upon reaction of the coupler with oxidized color developing agent, the timing group and the photographically useful group are released as a unit from the coupler moiety and thereafter the photographically useful group is released from the timing group by an intramolecular nucleophillic displacement reaction.

Claim 5

A photographic element comprising a support, at least one silver halide emulsion layer and a photographic coupler containing a coupler moiety, a photographically useful group, and a timing group Joining the coupler moiety and the photographically useful group, the timing group comprising a nucleophillic group attached to the coupler moiety at a position from which it is displaced as a result of reaction of the coupler moiety with oxidized color developing agent, an electrophillic group attached to the photographically useful group, and a linking group spatially relating the nucleophillic group and the electrophillic group to undergo, after cleavage of the timing group and the photographically useful group from the coupler moiety, an intramolecular nucleophilic displacement reaction which cleaves the photo-graphically useful group from the timing group.

Claim 6

A photographic element comprising a support, at least one silver halide emulsion layer and a photographic coupler containing a coupler moiety, a photographically useful group, and a timing group Joining the coupler moiety and the photographically useful group, the timing group comprising a nucleophillic group attached to the coupler moiety at a position from which it is displaced as a result of reaction of the coupler moiety with oxidized color developing agent, an electrophillic group attached to the photographically useful group, and a linking group spatially relating the nucleophillic group and the electrophillic group to undergo, after cleavage of the timing group and the photographically useful group from the coupler moiety, an intramolecular nucleophilic displacement reaction which cleaves the photo-graphically useful group from the timing group.

Claim 7

A photographic element comprising a support, at least one silver halide emulsion layer and a photographic coupler represented by the structure: where: COUP is a coupler moiety; PUG is a photographically useful group; Nu is a nucleophilic group attached to a position on COUP from which it will be displaced upon reaction of COUP with oxidized color developing agent; E is an electrophillic group, and X is a linking group for spatially relating Nu and E, upon release of Nu from COUP, to undergo an intramolecular nucleophilic displacement reaction with the formation of a three- to seven-membered ring and thereby release PUG.

Claim 8

A photographic element comprising a support, at least one silver halide emulsion layer and a photographic coupler represented by the structure: where: COUP is a coupler moiety; PUG is a photographically useful group; Nu is a nucleophilic group attached to a position on COUP from which it will be displaced upon reaction of COUP with oxidized color developing agent; E is an electrophillic group, and X is a linking group for spatially relating Nu and E, upon release of Nu from COUP, to undergo an intramolecular nucleophilic displacement reaction with the formation of a three- to seven-membered ring and thereby release PUG.

Claim 9

A photographic element of claim 4 wherein COUP is a coupler moiety which yields a colored product on reaction with oxidized color developing agent.

Claim 10

A photographic element of claim 4 wherein COUP is a coupler moiety which yields a colorless product on reaction with oxidized color developing agent.

Claim 11

A photographic element of claim 4 wherein Nu is selected from the group consisting of -O-(CR)n-, -S-(CR2)n-, -?-, , , , , , , , , , , and , E is selected from the group consisting of , , , , , , , , , , , , and ; where each R is independently hydrogen, alkyl of 1 to 20 carbon atoms or aryl of 6 to 20 carbon atoms, and n is an integer of from 0 to 4 such that the ring formed by Nu, X and E upon nucleophilic attack of Nu upon the electrophilic center of E contains 3 to 7 ring atoms.

Claim 12

A photographic element of claim 4 wherein PUG is a development inhibitor.

Claim 13

A photographic element of claim 4 wherein PUG is a dye or dye precursor.

Claim 14

A photographic element of claim 4 wherein PUG is a coupler.

Claim 15

A photographic element of claim 4 wherein PUG is a developing agent.

Claim 16

A photographic element of claim 4 wherein PUG is a bleach inhibitor.

Claim 17

A photographic element comprising a support and at least one silver halide emulsion layer having associated therewith a photographic coupler represented by the formula: where: COUP is a coupler moiety; Nu is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting of -0-, where R is hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono- or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and ; where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms; n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members, and PUG is a photographically useful group attached to a position on E from which it will be displaced upon nucleophilic attack of Nu at the electrophilic center in E. 14. A photographic element of claim 13 wherein COUP is a coupler moiety which yields a colored product on reaction with oxidized color developing agent.

Claim 18

A photographic element of claim 13 wherein

Claim 19

COUP is a coupler moiety which yields a colorless or neutral product on reaction with oxidized color developing agent.

Claim 20

COUP is a coupler moiety which yields a colorless or neutral product on reaction with oxidized color developing agent.

Claim 21

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, at least one of the silver halide emulsion units having associated therewith a photographic coupler containing a timing group between a coupler moiety and a photographically useful group, the coupler moiety being joined to the timing group and the timing group being joined to the photographically useful group so that upon reaction of the coupler with oxidized color developing agent, the timing group and the photographically useful group are released as a unit from the coupler moiety and thereafter the photographically useful group is released from the timing group by an intramolecular nucleophilic displacement reaction.

Claim 22

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, at least one of the silver halide emulsion units having associated therewith a photographic coupler containing a timing group between a coupler moiety and a photographically useful group, the coupler moiety being joined to the timing group and the timing group being joined to the photographically useful group so that upon reaction of the coupler with oxidized color developing agent, the timing group and the photographically useful group are released as a unit from the coupler moiety and thereafter the photographically useful group is released from the timing group by an intramolecular nucleophilic displacement reaction.

Claim 23

A photographic element of claim 16 wherein the photographic coupler contains a coupler moiety, a photographically useful group, and a timing group joining the coupler moiety and the photographically useful group, the timing group comprising a nucleophilic group attached to the coupler moiety at a position from which it is displaced as a result of reaction of the coupler moiety with oxidized color developing agent, an electrophilic group attached to the photographically useful group, and a linking group spatially relating the nucleophilic group and the electrophilic group to undergo, after cleavage of the timing group and the photographically useful group from the coupler moiety, an intramolecular nucleophilic displacement reaction which cleaves the photo-graphically useful group from the timing group.

Claim 24

A photographic element of claim 16 wherein the photographic coupler is represented by the structure where: COUP is a coupler moiety; PUG is a photographically useful group; Nu is a nucleophilic group attached to a position on COUP from which it will be displaced upon reaction of COUP with oxidized color developing agent; E is an electrophilic group; and X is a linking group for spatially relating Nu and E, upon release of Nu from COUP, to undergo an intramolecular nucleophilic displacement reaction with the formation of a three- to seven-membered ring and thereby release PUG.

Claim 25

A photographic element of claim 18 wherein Nu is selected from the group consisting of , , , , , , , , , , , and , E is selected from the group consisting of , , , , , , , , , , , , , anad ; where each R is independently hydrogen, alkyl of 1 to 20 carbon. atoms or aryl of 6 to 20 carbon atoms, and n is an integer of from 0 to 4 such that the ring formed by Nu, X and E upon nucleophilic attack of upon the electrophilic center of E contains 3 to 7 ring atoms.

Claim 26

A photographic element of claim 16 wherein the photographic coupler is represented by the structure where: COUP is a coupler moiety; Nu is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting -O-, -O-CR2-, , , -S-, -S-CR2- and where R is hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono- or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms; n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members, and PUG is a photographically useful group attached to a position on E from which it will be displaced upon nucleophilic attack of Nu at the electrophilic center in E.

Claim 27

A photographic element of claim 20 wherein PUG is a development inhibitor.

Claim 28

A photographic element of claim 20 wherein PUG is a dye or dye precursor.

Claim 29

A photographic element of claim 20 wherein PUG is a coupler.

Claim 30

A photographic element of claim 20 wherein PUG is a developing agent.

Claim 31

A photographic element of claim 20 wherein PUG is a bleach inhibitor.

Claim 32

A photographic element comprising a support having thereon a red-sensitive silver halide emulsion unit having associated therewith a cyan-dye-forming coupler, a green-sensitive silver halide emulsion unit having associated therewith a magenta-dye-forming coupler, and a blue-sensitive silver halide emulsion unit having associated therewith a yellow-dye-forming coupler at least one of the silver halide emulsion units having associated therewith a photographic coupler represented by the formula where: COUP 18 a coupler moiety; \ Nu is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting of , , , -S-, . and where R is hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono-or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms, n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members; and PUG is a development inhibitor attached to a position on E from which it will be displaced upon nucleo-philic attack of Nu at the electrophilic center in E.

Claim 33

A photographic element comprising a support having thereon a red-sensitive silver halide emulsion unit having associated therewith a cyan-dye-forming coupler, a green-sensitive silver halide emulsion unit having associated therewith a magenta-dye-forming coupler, and a blue-sensitive silver halide emulsion unit having associated therewith a yellow-dye-forming coupler at least one of the silver halide emulsion units having associated therewith a photographic coupler represented by the formula where: COUP 18 a coupler moiety; \ Nu is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting of , , , -S-, . and where R is hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono-or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms, n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members; and PUG is a development inhibitor attached to a position on E from which it will be displaced upon nucleo-philic attack of Nu at the electrophilic center in E.

Claim 34

A photographic element of claim 26 wherein COUP is a coupler moiety which yields a colorless product on reaction with oxidized color developing agent.

Claim 35

A photographic element of claim 26 wherein COUP is a coupler moiety which yields a colored product on reaction with oxidized color developing agent.

Claim 36

A photographic element of claim 28 wherein the photographic coupler and the dye forming coupler yield dyes of essentially the same color on reaction with oxidized color developing agent.

Claim 37

A photographic element of claim 28 wherein the photographic coupler and the dye forming coupler yield dyes of different color on reaction with oxidized color developing agent.

Claim 38

A photographic element comprising a support having thereon a red-sensitive silver halide emulsion unit having associated therewith a cyan-dye-forming coupler, a green-sensitive silver halide emulsion unit having associated therewith a magenta-dye-forming coupler and a blue-sensitive silver halide emulsion unit having associated therewith a yellow-dye-forming coupler, at least one of the silver halide emulsion units having associated therewith as a dye forming coupler a photographic coupler represented by the formula where: COUP is a coupler moiety; Nu is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting of -O-, -O-CR2-, , , -S-, -S-CR2- and where R is hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono- or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms; n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members; and PUG is a dye or dye precursor attached to a position on E from which it will be displaced upon nucleo-philic attack of Nu at the electrophilic center in E.

Claim 39

A photographic element comprising a support having thereon a red-sensitive silver halide emulsion unit having associated therewith a cyan-dye-forming coupler, a green-sensitive silver halide emulsion unit having associated therewith a magenta-dye-forming coupler and a blue-sensitive silver halide emulsion unit having associated therewith a yellow-dye-forming coupler, at least one of the silver halide emulsion units having associated therewith as a dye forming coupler a photographic coupler represented by the formula where: COUP is a coupler moiety; Nu is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting of -O-, -O-CR2-, , , -S-, -S-CR2- and where R is hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono- or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms; n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members; and PUG is a dye or dye precursor attached to a position on E from which it will be displaced upon nucleo-philic attack of Nu at the electrophilic center in E.

Claim 40

A photographic element of claim 31 wherein PUG is a dye precursor which on release from E in an alkaline photographic processing composition yields a dye of essentially the same color as the dye formed by reaction of COUP with oxidized color developing agent.

Claim 41

A photosensitive silver halide emulsion containing a photographic coupler having a timing group which is cleaved from the coupler as a result of reaction of the coupler with oxidized color developing agent and thereafter undergoes an intramolecular nucleophilic displacement reaction to make available a photographically useful group.

Claim 42

A photosensitive silver halide emulsion containing a photographic coupler having a timing group which is cleaved from the coupler as a result of reaction of the coupler with oxidized color developing agent and thereafter undergoes an intramolecular nucleophilic displacement reaction to make available a photographically useful group.

Claim 43

A photosensitive silver halide emulsion containing a photographic coupler having a timing group between a coupler moiety and a photographically useful group, the coupler moiety being joined to the timing group and the timing group being joined to the photographically useful group so that upon reaction of the coupler with oxidized color developing agent, the timing group and the photographically useful group are released as a unit from the coupler moiety and thereafter the photographically useful group is released from the timing group by an intramolecular nucleophilic displacement reaction.

Claim 44

A photosensitive silver halide emulsion containing a photographic coupler having a timing group between a coupler moiety and a photographically useful group, the coupler moiety being joined to the timing group and the timing group being joined to the photographically useful group so that upon reaction of the coupler with oxidized color developing agent, the timing group and the photographically useful group are released as a unit from the coupler moiety and thereafter the photographically useful group is released from the timing group by an intramolecular nucleophilic displacement reaction.

Claim 45

A silver halide emulsion containing a photo-graphic coupler having a coupler moiety, a photographically useful group, and a timing group joining the coupler moiety and the photographically useful group, the timing group comprising a nucleophilic group attached to the coupler moiety at a position from which it is displaced as a result of reaction of the coupler moiety with oxidized color developing agent, an electrophilic group attached to the photographically useful group, and a linking group spatially relating the nucleophilic group and the electrophilic group to undergo, after cleavage of the timing group and the photographically useful group from the coupler moiety, an intramolecular nucleophilic displacement reaction which cleaves the photographically useful group from the timing group.

Claim 46

A silver halide emulsion containing a photo-graphic coupler having a coupler moiety, a photographically useful group, and a timing group joining the coupler moiety and the photographically useful group, the timing group comprising a nucleophilic group attached to the coupler moiety at a position from which it is displaced as a result of reaction of the coupler moiety with oxidized color developing agent, an electrophilic group attached to the photographically useful group, and a linking group spatially relating the nucleophilic group and the electrophilic group to undergo, after cleavage of the timing group and the photographically useful group from the coupler moiety, an intramolecular nucleophilic displacement reaction which cleaves the photographically useful group from the timing group.

Claim 47

A photographic silver halide emulsion containing a photographic coupler represented by the structure: where: COUP is a coupler moiety; PUG is a photographically useful group; Nu is a nucleophilic group attached to a position on COUP from which it will be displaced upon reaction of COUP with oxidized color developing agent; E is an electrophilic group; and X is a linking group for spatially relating Nu and E, upon release of Nu from COUP, to undergo an intromolecular nucleophilic displacement reaction with the formation of a three- to seven-membered ring and thereby release PUC.

Claim 48

A photographic silver halide emulsion containing a photographic coupler represented by the structure: where: COUP is a coupler moiety; PUG is a photographically useful group; Nu is a nucleophilic group attached to a position on COUP from which it will be displaced upon reaction of COUP with oxidized color developing agent; E is an electrophilic group; and X is a linking group for spatially relating Nu and E, upon release of Nu from COUP, to undergo an intromolecular nucleophilic displacement reaction with the formation of a three- to seven-membered ring and thereby release PUC.

Claim 49

A photographic silver halide emulsion containing a photographic coupler represented by the formula: where: COUP is a coupler moiety; NU is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting of -O-, -O-CR2-, , ,-S-, -S-CR2- and where R is hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono- or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms; n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members; and PUG is a photographically useful group attached to a position on E from which it will be displaced upon nucleophilic attack of Nu at the electrophilic center in E.

Claim 50

A photographic silver halide emulsion containing a photographic coupler represented by the formula: where: COUP is a coupler moiety; NU is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting of -O-, -O-CR2-, , ,-S-, -S-CR2- and where R is hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono- or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms; n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members; and PUG is a photographically useful group attached to a position on E from which it will be displaced upon nucleophilic attack of Nu at the electrophilic center in E.

Claim 51

A process of forming a photographic image which comprises developing an exposed silver halide emulsion layer with a color developing agent in the presence of a photographic coupler containing a timing group which is cleaved from the coupler as a result of reaction of the coupler with oxidized color developing agent and thereafter undergoes an intramolecular nucleophilic displacement reaction to make available a photographically useful group.

Claim 52

A process of forming a photographic image which comprises developing an exposed silver halide emulsion layer with a color developing agent in the presence of a photographic coupler containing a timing group which is cleaved from the coupler as a result of reaction of the coupler with oxidized color developing agent and thereafter undergoes an intramolecular nucleophilic displacement reaction to make available a photographically useful group.

Claim 53

A process of forming a photographic image which comprises developing an exposed silver halide emulsion layer with a color developing agent in the presence of a photographic coupler containing a timing group between a coupler moiety and a photographically useful group, the coupler moiety being joined to the photographically useful group so that upon reaction of the coupler with oxidized color developing agent, the timing group and the photographically useful group are released as a unit from the coupler moiety and thereafter the photographically useful group is released from the timing group by an intramolecular nucleophilic displacement reaction.

Claim 54

A process of forming a photographic image which comprises developing an exposed silver halide emulsion layer with a color developing agent in the presence of a photographic coupler containing a timing group between a coupler moiety and a photographically useful group, the coupler moiety being joined to the photographically useful group so that upon reaction of the coupler with oxidized color developing agent, the timing group and the photographically useful group are released as a unit from the coupler moiety and thereafter the photographically useful group is released from the timing group by an intramolecular nucleophilic displacement reaction.

Claim 55

A process of claim 39 wherein the photographic coupler contains a coupler moiety, a photographically useful group, and a timing group joining the coupler moiety and the photographically useful group, the timing group comprising a nucleophilic group attached to the coupler moiety at a position from which it is displaced as a result of reaction of the coupler moiety with oxidized color developing agent, an electrophilic group attached to the photographically useful group, and a linking group spatially relating the nucleophilic group and the electrophilic group to undergo, after cleavage of the timing group and the photographically useful group from the coupler moiety, an intramolecular nucleophilic displacement reaction which cleaves the photographically useful group from the timing group.

Claim 56

A process of claim 39 wherein the photographic coupler is represented by the structure: where: COUP is a coupler moiety; PUG is a photographically useful group; Nu is a nucleophilic group attached to a position on COUP from which it will be displaced upon reaction of COUP with oxidized color developing agent; E is an electrophilic group, and X is a linking group for spatially relating Nu and E, upon release of Nu from COUP, to undergo an intromolecular nucleophilic displacement reaction with the formation of a three- to seven-membered ring and thereby release PUG.

Claim 57

A process of claim 41 wherein Nu is selected from the group consisting of -O-(CR2)n-, -S-(CR2)n-, , , , , , , , , , , and , E is selected from the group consisting of , , , , , , , , , , , , , and ; where each R is independently hydrogen, alkyl of 1 to 20 carbon atoms or aryl of 6 to 20 carbon atoms, and n is an integer of from 0 to 4 such that the ring formed by Nu, X and E upon nucleophilic attack of Nu upon the electrophilic center of E contains 3 to 7 ring atoms.

Claim 58

A process of claim 39 wherein the photographic coupler is represented by the formula where: COUP is a coupler moiety; Nu is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting of -O-, -O-CR2-, , , -S-, -S-CR2- AND where R is hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono- or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms; n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members; and PUG is a photographically useful group attached to a position on E from which it will be displaced upon nucleophilic attack of Nu at the electrophilic center in E.

Claim 59

A process of claim 43 wherein the photographic coupler is contained in the photographic element.

Claim 60

A process of claim 44 wherein the photographic coupler is contained in a processing solution with the color developing agent.

Claim 61

A photographic coupler containing a timing group which is cleaved from the coupler as a result of reaction of the coupler with oxidized color developing agent and thereafter undergoes an intramolecular nucleophilic displacement reaction to make available a photographically useful group.

Claim 62

A photographic coupler containing a timing group which is cleaved from the coupler as a result of reaction of the coupler with oxidized color developing agent and thereafter undergoes an intramolecular nucleophilic displacement reaction to make available a photographically useful group.

Claim 63

A photographic coupler containing a timing group between a coupler moiety and a photographically useful group, the coupler moiety being the timing group and the timing group being joined to the photographically useful group so that upon reaction of the coupler with oxidized color developing agent, the timing group and the photographically useful group are released as a unit from the coupler moiety and thereafter the photographically useful group is released from the timing group by an intramolecular nucleophilic displacement reaction

Claim 64

A photographic coupler containing a timing group between a coupler moiety and a photographically useful group, the coupler moiety being the timing group and the timing group being joined to the photographically useful group so that upon reaction of the coupler with oxidized color developing agent, the timing group and the photographically useful group are released as a unit from the coupler moiety and thereafter the photographically useful group is released from the timing group by an intramolecular nucleophilic displacement reaction

Claim 65

A photographic coupler containing a coupler moiety, a photographically useful group, and a timing group joining the coupler moiety and the photographically useful group, the timing group comprising a nucleophilic group attached to the coupler moiety at a position from which it is displaced as a result of reaction of the coupler moiety with oxidized color developing agent, an electrophilic group attached to the photographically useful group, and a linking group spatially relating the nucleophilic group and the electrophilic group to undergo, after cleavage of the timing group and the photographically useful group from the coupler moiety, an intramolecular nucleophilic displacement reaction which cleaves the photo-graphically useful group from the timing group.

Claim 66

A photographic coupler containing a coupler moiety, a photographically useful group, and a timing group joining the coupler moiety and the photographically useful group, the timing group comprising a nucleophilic group attached to the coupler moiety at a position from which it is displaced as a result of reaction of the coupler moiety with oxidized color developing agent, an electrophilic group attached to the photographically useful group, and a linking group spatially relating the nucleophilic group and the electrophilic group to undergo, after cleavage of the timing group and the photographically useful group from the coupler moiety, an intramolecular nucleophilic displacement reaction which cleaves the photo-graphically useful group from the timing group.

Claim 67

A photographic coupler represented by the structure: where: COUP is a coupler moiety; PUG is a photographically useful group; Nu is a nucleophilic group attached to a position on COUP from which it will be displaced upon reaction of COUP with oxidized color developing agent; E is an electrophilic group; and X is a linking group for spatially relating Nu and E, upon release of Nu from COUP, to undergo an intramolecular nucleophilic displacement reaction with the formation of a three to seven-membered ring and thereby release PUG.

Claim 68

A photographic coupler represented by the structure: where: COUP is a coupler moiety; PUG is a photographically useful group; Nu is a nucleophilic group attached to a position on COUP from which it will be displaced upon reaction of COUP with oxidized color developing agent; E is an electrophilic group; and X is a linking group for spatially relating Nu and E, upon release of Nu from COUP, to undergo an intramolecular nucleophilic displacement reaction with the formation of a three to seven-membered ring and thereby release PUG.

Claim 69

A photographic coupler of claim 49 wherein Nu is selected from the group consisting of , -S-(CR2)n-, , , , , , , , , , , -O-?- and , E is selected from the group consisting of -O-(CR2)N-, , , , , , , , , , , , , and ; where each R is independently hydrogen, alkyl of 1 to 20 carbon atoms or aryl of 6 to 20 carbon atoms, and n is an integer of from 0 to 4 such that the ring formed by Nu, X and E upon nucleophilic attack of Nu upon the electrophilic center of E contains 3 to 7 ring atoms.

Claim 70

A photographic coupler represented by the formula: where: COUP is a coupler moiety; Nu is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting of -O-, -O-CR2-, , , -S-, -S-CR2- and where R 15 hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono- or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms; n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members; and PUG is a photographically useful group attached to a position on E from which it will be displaced upon nucleophilic attack of Nu at the electrophilic center in E.

Claim 71

A photographic coupler represented by the formula: where: COUP is a coupler moiety; Nu is a nucleophilic group attached to the coupling position of COUP, selected from the group consisting of -O-, -O-CR2-, , , -S-, -S-CR2- and where R 15 hydrogen or alkyl of 1 to 20 carbon atoms; Z represents the atoms necessary to complete a mono- or bicyclic aromatic or heterocyclic ring system containing 5 to 10 ring atoms; E is an electrophilic group selected from the group consisting of , , , and where each R is independently hydrogen or alkyl of 1 to 20 carbon atoms; n is an integer of 0 to 4 such that the ring formed upon reaction of the nucleophilic center of Nu with the electrophilic center of E contains 5 to 7 members; and PUG is a photographically useful group attached to a position on E from which it will be displaced upon nucleophilic attack of Nu at the electrophilic center in E.