Claims
- 1. A photographic material comprising a silver halide photographic emulsion containing at least one of the photographic couplers represented by the formula (I)
- [a]-- nhcor (i)
- wherein A represents a cyan color forming coupler residue having a naphthol coupling nucleus or phenol coupling nucleus; the RCONH-group is a substituent in the coupling position of [A], said coupling position being the 4-position of said naphthol or phenol nucleus, and R represents (1) an aliphatic hydrocarbon or alicyclic hydrocarbon group which has at least one electron attractive substituent in the .alpha.-position to the carbonyl group in the RCONH- group, or (2) an aryl group, a heterocyclic group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an acyl group or an amino group which may be substituted with one or more electron attractive substituents and said R as defined above is a residue derived from a carboxylic acid of the formula RCOOH having a pKa of about 1.3 or less.
- 2. The photographic material of claim 1 comprising a support having thereon the silver halide photographic emulsion.
- 3. The photographic material of claim 1 being a multi-layer color photographic material comprising a support having thereon at least one silver halide emulsion layer containing at least one coupler of the formula (I).
- 4. The photographic material of claim 1, wherein R in the formula (I) represents (1) an aliphatic hydrocarbon or alicyclic hydrocarbon group having 1 to 32 carbon atoms which has at least one electron attractive substituent in the .alpha.-position to the carbonyl group in the RCONH- group, or (2) an aryl group, a heterocyclic group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an acyl group, or an amino group, said electron attractive substituent being a halogen atom, a nitro group, a cyano group, a carbonyl-containing group, a carboxyl group, a sulfonyl-containing group or a sulfo group, and said R as defined above is a residue derived from a carboxylic acid of the formula RCOOH having a pKa of about 1.3 or less.
- 5. The photographic material of claim 1, wherein said coupler of the formula (I) is represented by the formula
- R.sub.2 --[A.sub.2 ]--NHCOR.sub.4 (III)
- wherein [A.sub.2 ] represents a naphthol cyan color forming coupler, R.sub.2 is substituted in the 2-position of said naphthol nucleus and represents a hydrogen atom, an alkyl group, or a carbamoyl group represented by the formula (VIII) or (IX)
- -- co -- nh -- x (viii) ##STR4## wherein X represents a straight or branched chain alkyl group, an alicyclic hydrocarbon group or an aryl group, which alkyl group and aryl group may be substituted with one or more of a halogen atom, a nitro group, a hydroxyl group, a carboxyl group, an amino group, an aryl group, an alkoxycarbonyl group, an acyloxycarbonyl group, an amido group, an imido group, a carbamoyl group, a sulfamoyl group, an alkoxy group, or an aryloxy group; Y and Y' each represents a group described above for X; R.sub.4 represents an aliphatic hydrocarbon group substituted with at least one electron attractive substituent in the .alpha. position to the carbonyl group in the R.sub.4 CONH-group, an aryl group or a heterocyclic group; and said R as defined above represents a residue derived from a carboxylic acid of the formula R COOH having a pKa of about 1.3 or less.
- 6. The photographic material of claim 5, wherein the coupler of the formula (III) is represented by the formula (XI) ##STR5## wherein R.sub.2, and R.sub.4 each has the same meaning as defined above, R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9 which may be the same or different, each represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an alkylthio group, a heterocyclic group, an amino group, a carbamido group, a sulfonamido group, sulfamoyl group or a carbamoyl group; and W represents a group of non-metal atoms necessary to form a naphthol ring together with the phenol ring.
- 7. The photographic material of claim 1, wherein said coupler is 1-hydroxy-4-trichloroacetamido-N-n-octadecyl-2-naphthamide.
- 8. The photographic material of claim 1, wherein said coupler is 1-hydroxy-4-(2,2,3,3,4,4,5,5)-octafluorovaleramido-N-[.gamma. -(2,4-di-tert-amylphenoxy)propyl]-2-naphthamide.
- 9. The photographic material of claim 1, wherein said coupler is 1-hydroxy-4-pentafluorobenzamido-N-[.gamma.-(2,4-di-tert-amylphenoxy)propyl]-2-naphthamide.
- 10. The photographic material of claim 1, wherein said coupler is 1-hydroxy-4-heptafluorobutyramido-3'-[.alpha.-(3-tert-butyl-4-hydroxyphenoxy)tetradecanamido]-2-naphthanilide.
- 11. The photographic material of claim 1, wherein said coupler is 1-hydroxy-4-trichloroacetamido-N-[.gamma.-(2,4-di-tert-amylphenoxy)propyl]-2-naphthamide.
- 12. The photographic material of claim 1, wherein said coupler is 1-hydroxy-4-dichloroacetamido-N-[.gamma.-)2,4-di-tert-amylphenoxy)propyl]-2-naphthamide.
- 13. The photographic material of claim 1, wherein said coupler is 1-hydroxy-4-(2-nitrobenzamido)-2-naphthanilide.
- 14. A method of forming color images comprising development processing an exposed silver halide photographic material of claim 1 with an aromatic primary amine developing agent, to carry out a coupling reaction between said developing agent and the photographic coupler of the formula (I) during silver halide development.
Priority Claims (1)
Number |
Date |
Country |
Kind |
49-92895 |
Aug 1974 |
JA |
|
CROSS REFERENCE TO THE RELATED APPLICATION
This is a continuation-in-part application of Ser. No. 604,864, filed Aug. 14, 1975, now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (1)
Number |
Date |
Country |
503,826 |
Apr 1939 |
UK |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
604864 |
Aug 1975 |
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