Light-sensitive silver halide photographic material

Claim 2

A light-sensitive silver halide photographic material having a support and at least a silver halide emulsion layer coated thereon, said material containing a development inhibitor releasing compound which forms substantially a colorless compound and simultaneously releases a development inhibitor on reaction with an oxidation product of a color developing agent and has the following formula: ##STR5## wherein A represents a sulfur or selenium atom; ##STR6## radical, wherein R 1 represents (1) a saturated or unsaturated aliphatic radical having up to 18 carbon atoms, (2) an aryl radical selected from the group consisting of phenyl and naphthyl, or (3) a 5-6 membered heterocyclic radical, and (4) two of R 1 can form together a 5-6 membered heterocyclic ring; R represents (1) an alkyl radical having up to 18 carbon atoms, (2) an aryl radical selected from the group consisting of phenyl and naphthyl, (3) a 5-6 membered heterocyclic radical, (4) a -A-Y radical, (5) a halogen atom, or (6) a -O-W radical, wherein W represents an alkyl radical having up to 5 carbon atoms, an aryl radical selected from the group of a phenyl and naphthyl, a lower acyl radical having up to 5 carbon atoms or a 5-6 membered heterocyclic radical; Z represents a halogen atom; Y represents a radical forming a development inhibitor with the sulfur or selenium atom and is selected from the group consisting of a heterocyclic mercapto compound, an aromatic mercapto compound, a heterocyclic seleno compound and an aromatic seleno compound when the thioether or selenoether bond is split off.

Claim 3

A light-sensitive silver halide photographic material according to claim 1, wherein R 1 represents (1) an alkyl radical having up to 18 carbon atoms, (2) an aryl radical which can be substituted with an alkyl having up to 18 carbon atoms, alkoxy or acylamino radical, a halogen atom, a nitro or nitrile radical, (3) a 5-6 membered heterocyclic radical which has one or more heteroatoms selected from the group consisting of N, O, S and Se, and which can be condensed with a benzene or naphthalene ring, and (4) when R 1 is two or more, both of R 1 can form together a 5-6 membered heterocyclic ring selected from the group of piperidine, pyrrolidine and morpholine; R represents (1) an alkyl radical having up to 18 carbon atoms, (2) an aryl radical which can be substituted with an alkyl having up to 18 carbon atoms or alkoxy radical, a halogen atom, a nitro or nitrile radical (3) a 5-6 membered heterocyclic radical containing one or more heteroatoms selected from the group consisting of N, O, S and Se, and which can be condensed with a benzene or naphthalene ring, (4) a -A-Y radical, (5) a halogen atom or (6) a -O-W radical, wherein W represents an alkyl radical having up to 5 carbon atoms, an aryl radical selected from the group of a phenyl and naphthyl radical, a lower acyl radical having up to 5 carbon atoms, or a 5-6 membered heterocyclic radical which contains one or more heteroatoms selected from the group consisting of N, O, S, and Se, and which can be condensed with a benzene or naphthalene ring; Y represents a radical forming a development inhibitor selected from the group consisting of a mercaptotetrazole, mercaptothiazole, mercaptoxadiazole, mercaptopiperidine, mercaptothiadiazole, mercaptotriazine, mercaptotriazole, mercaptobenzene, selenotetrazole, selenobenzoxazole, selenobenzothiazole and selenophenol compound.

Claim 4

A light-sensitive silver halide photographic material according to claim 2, wherein R 1 represents a phenyl or naphthyl radical both of which can be substituted with an alkyl having up to 18 carbon atoms, alkoxy or acylamino radical, a halogen atom, a nitro or nitrile radical; R represents a phenyl or naphthyl radical both of which can be substituted with an alkyl having up to 18 carbon atoms or alkoxy radical, a halogen atom, a nitro or nitrile radical.

Claim 5

A light-sensitive silver halide photographic material according to claim 2 wherein Y represents a radical forming a development inhibitor selected from the group consisting of 1-phenyl-5-mercaptotetrazole, 1-nitrophenyl-5-mercaptotetrazole, 1-naphthyl-5-mercaptotetrazole, 2-mercaptobenzthiazole, 2-mercaptonaphthothiazole, 2-mercaptoxadiazole, 1-mercapto-2-benzoic acid, 1-mercapto-3-heptadecanoylaminobenzene, 1-phenyl-5-selenotetrazole, 2-selenobenzothiazole and 4-(4-hydroxyphenylsulfonyl)selenophenol.

Claim 6

A light-sensitive silver halide photographic material according to claim 1, wherein the development inhibitor releasing compound is selected from the group consisting of: ##STR7##

Claim 7

A light-sensitive silver halide photographic material according to claim 1, wherein the development inhibitor releasing compound is incorporated into the silver halide emulsion.