Silver halide photographic material

Claim 2

A silver halide photogrpahic material containing at least one compound having a group which after being released from the compound by redox reaction becomes converted into a compound having the development restraining ability and which becomes further converted in the developing solution into a compound which has no substantial development restraining ability or which shows a marked decrease in such ability.

Claim 3

A silver halide photographic material as claimed in Claim 1, wherein said compound is employed in an amount of from 10 -6 to 1 mol/mol of silver.

Claim 4

A silver halide photographic material as claimed in Claim 2, wherein said compound is employed in an amount of from 10 -5 to 10 -1 mol per mol of silver.

Claim 5

A silver halide photographic material as claimed in Claim 1, wherein compound is represented by general formula (I): wherein A and A' are each a group which can be hydrolyzed by hydrogen or alkali; X, Y and Z are each hydrogen, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, a thioalkyl qroup, or an electron-withdrawing group; PUG is a group released by a reaction with a light-exposed silver halide and/or the oxidized product of the developing agent; Time is a timing group; (Time) PUG is a group released as ⊖ Time PUG first when the oxidation-reduction moiety causes a cross reaction during the development and becomes an oxidized product, and is bonded to the benzene nucleus via a sulfur atom, a nitrogen atom or a selenium atom; and t is 0 or 1.

Claim 6

A silver halide photographic material as claimed in Claim 4, wherein said PUG is represented by general formula (II); -AF- CCD (II) wherein AF is selected from the group consisting of: wherein G 1 is hydrogen, a halogen atom, an alkyl group, an acylamino group, an alkoxy group, a sulfonamido group, an alkylthio group, an alkylamino group, an anilino group, an amino group, an alkoxycarbonyl group, an acyloxy group, a nitro group, a cyano group, a sulfonyl group, an aryloxy group, a hydroxy group, a thioamido group, a carbamoyl group, a sulfamoyl group, a carboxyl group, a ureido group or an aryloxycarbonyl group, G 2 is any one of the substituents listed for G 1 which may form a divalent group; G 3 is a substituted or unsubstituted alkylene group or a substitu- tad or unsubstituted arylene group, V 1 is a nitrogen atom or a methine group; V 2 is an oxygen atom, sulfur atom, G 4 is any one of the substituents listed for G 1 or (G 3 ) h -CCD, G 5 is a hydrogen atom, an alkyl group or an aryl group and, f is an integer of 1 or 2, and h is 0 or 1, wherein in formulas (P-4) and (P-5), at least one of the groups represented by V 2 and G 4 contains CCD;

Claim 7

A silver halide photographic material as claimed in Claim 4, wherein said compound is represented by general formula (III): wherein Q is an atomic group which bonds to C A and C B and forms a substituted benzene ring-type oxidation-reduction moiety from which Time-PUG can be released first by oxidation during the photographic development processings EWG is an electron-withdrawing group having a Hammett's apara value exceeding 0.3; C A and C B are each a carbon atom which conjugates E WG with Time-PUG via a substituted ethylene bond or its vinylog, when the compound of formula (III) is oxidizad; R 10 and R 20 are each a hydrogen atom or an appropriate substituent; Time and t are the same as defined in Claim 4; PUG is the same as defined in Claim 4, and when t is 0, it is a sulfur atom, a nitrogen atom or a selenium atom and is connected with C B ; and n is an integer of 0 or 1.