Claims
- 1. A silver halide color photosensitive material comprising a support having thereon at least one hydrophilic colloidal layer containing at least one coupler represented by formula (I): ##STR30## wherein R.sup.1 and R.sup.2 each represents an electron withdrawing group having a Hammett's .sigma.p value of 0.35 or higher; X represents hydrogen atom or a group releasable on a coupling reaction with an oxidation product of a color developing agent; Z.sup.1 represents a nonmetallic atom group necessary for forming a nitrogen-containing, six-membered, heterocyclic ring which has at least one dissociative group: Z.sup.1 cannot be --C(.dbd.O)--N(R)--C(.dbd.O)--NH--; and R represents a substituent.
- 2. A silver halide color photosensitive material according to claim 1, wherein the substituents represented by R.sup.1 and R.sup.2 are selected from the group consisting of an aryl group, an alkyl group, a cyano group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, formylamino group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfonamido group, an ureido group, a sulfamoylamino group, an alkylamino group, an arylamino group, a sulfamoyl group, and a sulfonyl group.
- 3. A silver halide color photosensitive material according to claim 1, wherein X is selected from the group consisting of a hydrogen atom, a halogen atom, an alkoxy group, an aryloxy group, an alkyl, aryl or heteryl acyloxy group, an alkyl, aryl or heteryl sulfonyloxy group, an acylamino group, a sulfonamido group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an alkylthio group, an arylthio group, a heterocyclic thio group, a carbamoylamino group, a 5- or 6-membered nitrogen-containing heterocyclic group, an imido group, an aryl azo group, an alkyl, aryl or heteryl sulfinyl group and an alkyl, aryl or heteryl sulfonyl group.
- 4. A silver halide color photosensitive material according to claim 1, wherein the nitrogen-containing, six-membered, heterocyclic ring is formed by four divalent groups selected from the group consisting of --NH--, --N(R)--, --N.dbd., --CH(R)--, --CH.dbd., --C(R).dbd., --CO--, --S--, --SO--, and --SO.sub.2 -- (wherein R represents a substituent), and the dissociative group is selected from among --NH-- and --CH(R)--.
- 5. A silver halide color photosensitive material according to claim 1, wherein R.sup.1 represents an electron withdrawing group having a Hammett's .sigma.p value of 0.60 or higher.
- 6. A silver halide color photosensitive material according to claim 1, wherein the electron withdrawing group having a Hammett's .sigma.p value of 0.35 or higher is selected from the group consisting of a cyano group, a nitro group, a carboxyl group, a perfluoroalkyl group, an acyl group, a formyl group, a sulfonyl group, a sulfinyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a heterocyclic group, an alkylsulfonyloxy group, a phosphoryl group, a sulfamoyl group, a pentachlorophenyl group, a pentafluorophenyl group and a sulfonyl group substituted phenyl group.
- 7. A silver halide color photosensitive material according to claim 1, wherein the coupler represented by formula (I) is contained in an amount of from 1.times.10.sup.-3 to 1 mol per mol of silver halide.
- 8. A silver halide color photosensitive material according to claim 1, wherein the coupler represented by formula (I) is a cyan coupler.
- 9. A silver halide color photosensitive material according to claim 1, wherein the hydrophilic colloidal layer is a red-sensitive silver halide emulsion layer.
- 10. A silver halide color photosensitive material according to claim 1, wherein the coupler of formula (I) is a coupler represented by one of formula (II) to (VII) and (IX) to (XIX): ##STR31## wherein in the above formulae (II) to (VII) and (IX) to (XIX), R.sup.1 and R.sup.2 have the same meaning as R.sup.1 and R.sup.2 in formula (I), R.sup.3, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 each represents a hydrogen atom or a substituent, R.sup.4 represents a substituent, and EWG represents an electron withdrawing group having a Hammett's .sigma.p value of 0.35 or higher.
Priority Claims (2)
Number |
Date |
Country |
Kind |
2-336807 |
Nov 1990 |
JPX |
|
4-69854 |
Feb 1992 |
JPX |
|
Parent Case Info
This is a divisional of application Ser. No. 08/014,419, filed Feb. 5, 1993, which is a continuation-in-part of application Ser. No. 07/798,114, now abandoned, which was filed Nov. 26, 1991.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4950585 |
Tachibana et al. |
Aug 1988 |
|
5187057 |
Ikosu et al. |
Feb 1993 |
|
5208141 |
Ikesu et al. |
May 1993 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
2-304438 |
Dec 1990 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Patent Abstract of Japan, vol. 16, No. 540 (P-1450), Nov. 10, 1992. |
Divisions (1)
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Number |
Date |
Country |
Parent |
14419 |
Feb 1993 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
798114 |
Nov 1991 |
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