Silver halide color photographic material

Claim 2

A silver halide color photographic material comprising at least one light-sensitive silver halide emulsion layer on a support, wherein at least one of said emulsion layer and a non-light sensitive hydrophilic layer(s) contains at least one compound represented by the formula (I) PWR--Time--.sub.t BA (I) wherein PWR represents a group which undergoes reduction to release (Time- t BA; BA represents a group which becomes a desilvering accelerator after being released; Time represents a group which .releases BA through a reaction after being released from PWR as (Time-- t BA; and t represents an integer of 0 or 1.

Claim 3

A silver halide color photographic material as claimed in claim 1, wherein the compound represented by the formula (I) is a compound represented by the formula (II): ##STR34## wherein EAG represents an electron-accepting group; N represents a nitrogen atom; X represents an oxygen atom (--O--), sulfur atom (--S--), or atomic group containing a nitrogen atom (--N(R 3 )--); R 1 , R 2 and R 3 each represents a chemical bond or a group other than hydrogen atom; BA represents a group which becomes a desilvering accelerator after being released; Time represents a group which releases BA through a reaction triggered by N--X bond cleavage; t represents an integer of 0 or 1; the solid line indicates a chemical bond; and the dotted lines indicate that at least one thereof is bonded; with the proviso that R 1 R 2 , R 3 , and EAG may be connected to each other to form a ring, and that when t is 0, Time represents a chemical bond.

Claim 4

A silver halide color photographic material as claimed in claim 2, wherein R 1 , R 2 and R 3 each represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted cycloalkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted acyl group, a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted arylsulfonyl group, a substituted or unsubstituted carbamoyl group, and a substituted or unsubstituted sulfamoyl group.

Claim 5

A silver halide color photographic material as claimed in claim 2, wherein R 1 , R 2 and R 3 each contains 1 to 40 carbon atoms.

Claim 6

A silver halide color photographic material as claimed in claim 2, wherein the compound represented by the formula (II) is a compound represented by the formula (III): ##STR35## wherein Y represents a divalent connecting group; R 4 represents an atomic group which is connected to X and Y to form a 5- to 8- membered heterocyclic group with a nitrogen atom; EAG represents an electron-accepting group; N represents a nitrogen atom; X represents an oxygen atom (--O--), sulfur atom (--S--), or atomic group containing a nitrogen atom (--N(R 3 )--); R 3 represents a chemical bond or a group other than hydrogen atom; BA represents a group which becomes a desilvering accelerator after being released; Time represents a group which releases BA through a reaction triggered by N--X bond cleavage; t represents an integer of 0 or 1; the solid line indicates a chemical bond; and (Time-- t BA is connected to at least one of R 4 and EAG.

Claim 7

A silver halide color photographic material as claimed in claim 5, wherein Y represents ##STR36## (wherein R 7 represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic gtroup).

Claim 8

A silver halide color photographic material as claimed in claim 5, wherein EAG represents an aromatic group represented by formula (A): ##STR37## wherein Z 1 represents ##STR38## V n represents an atomic group which form a 3- to 8-membered aromatic group with Z 1 and Z 2 ; n represents an integer of 3 to 8; V 3 , V 4 , V 5 , V 6 , V 7 , and V 8 represents --Z 3 --, --Z 3 --Z 4 --, --Z 3 --Z 4 --Z 5 --, --Z 3 --Z 4 --Z 5 --Z 6 --, --Z 3 --Z 4 --Z 5 --Z 6 --Z 7 --, and Z 3 --Z 4 --Z 5 --Z 6 --Z 7 --Z 8 --, respectively, wherein Z 2 to Z 8 each represents ##STR39## --O--, --S--, or --SO 2 -- in which Sub represents a chemical bond (n bond), hydrogen atom, or substituent, or Sub groups are connected to each other to form a 3- to 8-membered saturated or unsaturated carbon ring or heterocyclic ring.

Claim 9

A silver halide color photographic material as claimed in claim 7, wherein Sub(s) is selected so that the sum of sigma para of Hammett's constants of the substitutent is at least ±0.50.

Claim 10

A silver halide color photographic material as claimed in claim 1, wherein said desilvering accelerator is a compound selected from the group consisting of compounds represented by formulae (a) to (i): ##STR40## wherein R' 1 and R' 2 each represents a hydrogen atom, a substituted or unsubstituted lower alkyl group, or an acyl group, or R' 1 and R' 2 are connected to each other to form a ring, and m represents an integer of 1 to 3; ##STR41## wherein R' 3 and R' 4 each represents a hydrogen atom, a substituted or unsubstituted lower alkyl group, or an acyl group, or R' 3 and R' 4 are connected to each other to form a ring, and m represents an integer of 1 to 3; ##STR42## wherein R' 5 represents a hydrogen atom, a halogen atom, an amino group, a substituted or unsubstituted lower alkyl group, or an amino group containing mono- or di-alkyl group; ##STR43## wherein R' 6 and R' 7 each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted phenyl group, a substituted or unsubstituted heterocyclic group, R' 8 represents a hydrogen atom or a substituted or unsubstituted lower alkyl group, R' 9 represents a hydrogen atom or a carboxyl group; ##STR44## wherein R' 10 , R' 11 , and R' 12 each represents a hydrogen atom or a lower alkyl group, or R' 10 and R' 11 or R' 12 are connected to each other to form a ring, Z represents a substituted or unsubstituted amino group, a sulfonic acid group, or carboxyl group, n represents an integer of 1 to 3; HS--R'--COOM (h) HS--R'--SO.sub.3 M (i) wherein R' represents an alkylene group, and M represents a hydrogen atom, an alkali metal atom or NH 4 .

Claim 11

A silver halide color photographic material as claimed in claim 1, wherein the amount of the compound of formula (I) is 1×10 -5 to 1×10 3 mol per 1 mol of silver halide.

Claim 12

A silver halide color photographic material as claimed in claim 1, wherein the compound of formula (I) is incorporate at least one of said emulsion layer.

Claim 13

A silver halide color photographic material as claimed in claim 1, wherein the compound of formula (I) is incorporated into at least one non-light sensitive hydrophilic layer.

Claim 14

A silver halide color photographic material as claimed in claim 1, wherein said non-light sensitive hydrophilic layer is a protective layer, an interlayer or an antihalation layer.