EP0431374A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Color coupler for photography and silver halide photographic material comprising the same
Assignee: Fujifilm Holdings Corp
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Filing: 1990-11-16
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Granted: —
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Expires: 2010-11-16
Abstract
Abstract There are disclosed a novel color coupler for photography and a silver halide color photographic material comprising the same, wherein the color coupler is one of β,γ-unsaturated nitriles represented by formula (I). The disclosure described provides a color coupler, particularly a cyan coupler, which forms color images less in subsidiary absorption, good in color reproduction, and excellent in fastness, and a silver halide color photographic material having color images as described above. Further the color coupler having features that can be synthesized from inexpensive raw material in a low cost is provided.
Inventors
- 👤 Kozo C/O Fuji Photo Film Co. Ltd. Sato
- 👤 Yasuhiro C/O Fuji Photo Film Co. Ltd. Shimada
- 👤 Hideaki C/O Fuji Photo Film Co. Ltd. Naruse
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 22:56
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/45; C07C255/01; C07C255/23; C07C255/30; C07C255/32; C07C255/34; C07C255/35; C07C255/41; C07C255/42; C07C255/44; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
124 words
A color coupler for photography represented by the following formula (I): wherein W represents a hydrogen atom or an atom or group capable of being released when the compound is subjected to a coupling reaction with the oxidized product of an aromatic primary amine derivative, R₁ represents a substituent, V represents a nitrogen atom or when V represents a nitrogen atom, R₂ represents a substituent, and when V represents R₂ and R₃ each represent a substituent, provided that at least one of R₂ and R₃ represents an electron attractive substituent and provided that if R₂ or R₃ represents an aliphatic group or an aromatic group, the other does not represent an acyl group, and R₁ and R₂ may bond together to form a ring.
Claim 2
Dependent Claim
124 words
A color coupler for photography represented by the following formula (I): wherein W represents a hydrogen atom or an atom or group capable of being released when the compound is subjected to a coupling reaction with the oxidized product of an aromatic primary amine derivative, R₁ represents a substituent, V represents a nitrogen atom or when V represents a nitrogen atom, R₂ represents a substituent, and when V represents R₂ and R₃ each represent a substituent, provided that at least one of R₂ and R₃ represents an electron attractive substituent and provided that if R₂ or R₃ represents an aliphatic group or an aromatic group, the other does not represent an acyl group, and R₁ and R₂ may bond together to form a ring.
Claim 3
Dependent Claim
99 words
The color coupler for photography as claimed in claim 1, wherein the compound represented by formula (I) is represented by the following formula (II): wherein W has the same meaning as in formula (I), X, Y, and Z each represent a nitrogen atom, a methine group, or a methine group having an electron attractive group, with at least one of X, Y, and Z being a methine group having an electron-attractive group, n is 1 or 2, and Q represents a group of nonmetal atoms required to form a heterocyclic ring or an aromatic ring together with the residue.
Claim 4
Dependent Claim
69 words
The color coupler for photography as claimed in claim 1, wherein the compound represented by formula (I) is represented by the following Formula (III): wherein W has the same meaning as in formula (I), and R₄ and R₅ each represent a substituent, provided that at least one of R₄ and R₅ represents an electron attractive substituent and provided that R₄ and R₅ do not bond to form a ring.
Claim 5
Dependent Claim
93 words
The color coupler for photography as claimed in claim 1, wherein R₁ in formula (I) is selected from the group consisting of a halogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an alkoxy group, an aryloxy group, an alkenyloxy group, an amino group, an acyl group, an ester group, an amido group, a sulfamido group, an imido group, an ureido group, an aliphatic or an aromatic sulfonyl group, an aliphatic or aromatic thio group, a hydroxy group, a cyano group, a carboxy group, a nitro group, and a sulfo group.
Claim 6
Dependent Claim
45 words
The color coupler for photography as claimed in claim 1, wherein when V in formula (I) represents at least one of R₂ and R₃ represents an electron attractive substituent or atom wherein the value of the Hammett substituent constant σ p is 0.10 to 2.
Claim 7
Dependent Claim
56 words
The color coupler for photography as claimed in claim 1, wherein, when R₂ or R₃ is not an electron attractive substituent, R₂ or R₃ is selected form the group consisting of an aliphatic group, an alkoxy group, an amido group, an aromatic group that is not substituted by an electron attractive group, and a heterocyclic group.
Claim 8
Dependent Claim
41 words
The color coupler for photography as claimed in claim 1, wherein X represents and Y represents wherein R₆ and R₇, which may be the same or different, or may bond together to form a ring, each represent an electron attractive substituent.
Claim 9
Dependent Claim
41 words
The color coupler for photography as claimed in claim 1, wherein Y represents and Z represents wherein R₇ and R₈, which may be the same or different, or may bond together to form a ring, each represent an electron attractive substituent.
Claim 10
Dependent Claim
76 words
The color coupler for photography as claimed in claim 2, wherein Q in formula (II) represents an atom or an atomic group required to form together with the bonded carbon atoms or nitrogen atom a ring having 5 or more members, and the bivalent group that forms the ring includes a bivalent amino group, an ether linkage, a thioether linkage, an alkylene group, an alkenylene group an imino group, a sulfonyl group, and a carbonyl group.
Claim 11
Dependent Claim
23 words
The color coupler for photography as claimed in claim 2, wherein Q represents a thioether linkage, an imino group, or a sulfonyl group.
Claim 12
Dependent Claim
40 words
The color coupler for photography as claimed in claim 3, wherein at least one of R₄ and R₅ in formula (III) represents an electron attractive substituent wherein the value of the Hammett substituent constant σ p is 0.10 or over.
Claim 13
Dependent Claim
42 words
The color coupler for photography as claimed in claim 3, wherein, when R₄ or R₅ is not an electron attractive substituent, when R₄ or R₅ is selected from the group consisting of an aliphatic group, an aromatic group, and a heterocyclic group.
Claim 14
Dependent Claim
83 words
The color coupler for photography as claimed in claim 1, wherein W is a group capable of being released selected from the group consisting of a halogen atom, an alkoxy group, an aryloxy group, an acyloxy group, an aliphatic or aromatic sulfonyloxy group, an acylamino group, an aliphatic or aromatic sulfonamido group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an aliphatic, aromatic, or heterocyclic thio group, a carbamoylamino group, a 5- or 6-membered nitrogen-containing heterocyclic group, an imido group, and an aromatic azo group.
Claim 15
Dependent Claim
15 words
A silver halide color photographic material comprising a color coupler as claimed in claim (I).
Claim 16
Dependent Claim
38 words
The silver halide color photographic material as claimed in claim 14, wherein the compound represented by formula (I) is used as a cyan coupler in the photosensitive silver halide emulsion layer of the silver halide color photographic material.
Claim 17
Dependent Claim
34 words
The silver halide color photographic material as claimed in claim 14, wherein the compound represented by formula (I) is used in a red-sensitive silver halide emulsion layer of the silver halide color photographic material.
Claim 18
Dependent Claim
31 words
The silver halide color photographic material as claimed in claim 14, wherein the color coupler represent by formula (I) is contained 0.002 to 2 mol per mol of photosensitive silver halide.
Claim 19
Dependent Claim
38 words
A method for forming a color image, which comprises developing a silver halide color photographic material by a color developer containing an aromatic primary amine derivative, in the presence of the color coupler as claimed in claim 1.
References Cited (Backward Citations)
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