Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Reexamination Certificate
2002-05-30
2003-12-09
Letscher, Geraldine (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
C430S543000, C430S544000, C430S955000, C430S957000
Reexamination Certificate
active
06660465
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2001-167153, filed Jun. 1, 2001, the entire contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a dye-forming coupler that forms an azomethine dye by coupling reaction with an oxidant of a developing agent, and to a silver halide photographic lightsensitive material containing the coupler.
2. Description of the Related Art
In a silver halide photographic lightsensitive material (hereinafter it may be simply referred to as “lightsensitive material”) in subtractive color processes, a color image is formed by dyes of three primary colors of yellow, magenta and cyan. In an existent color photography using a p-phenylenediamine color developing agent, acyl acetanilide-type compounds are used as an yellow coupler. However, a hue of the yellow dye obtained from these couplers is reddish, and if this is illustrated using an absorption curve the absorption curve of the couplers only drops gently toward the longer wavelength side after its peak, or in other words, the curve does not drop sharply toward the longer wavelength side after its peak. Thus, it is difficult to obtain a yellow hue of high purity. Further, it has the problem that the molar extinction coefficient of the dye is small, and thus a large quantity of couplers and silver halide are required to obtain a desired color density, which increases the film thickness of the lightsensitive material and reduces sharpness of a color image obtained. Furthermore, the dye is ready to decompose under conditions of high temperature and high humidity, or under conditions of light irradiation, and has a problem in the image storability after development, and thus is required to be improved.
To solve these problems, the acy and anilide groups have been improved, and recently, 1-alkylcyclopropanecarbonylacetanilide compounds described in Jpn. Pat. Appln. KOKAI Publication No. (hereinafter referred to as “JP-A-”) 4-218042, a malonediamide-type coupler described in JP-A-5-11416, and pyrrole-2-yl or -3-yl or indole-2-ylcarbonyl or -3-yl carbonylacetanilide couplers described in EP's 953870A1, 953871A1, 953872A1, 953873A1, 953874A1, and 953875A1, for example, have been proposed as a coupler obtained by improving a conventional acyl acetanilides. Dyes generated from these couplers have been improved in the hue and molar extinction coefficient in comparison with a conventional one. However, the color generation property of the couplers are low, and thus the structures of the couplers are very complicated to improve the low color generation property. Therefore, synthesizing the couplers is difficult, and the route becomes long, which increases the costs of the couplers, and causes a problem in practical use.
Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out hereinafter.
BRIEF SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide a dye-forming coupler with high color generation property, which can be prepared with a shorter process and at a low cost, and provide a silver halide color photographic lightsensitive material containing such a coupler.
As a result of diligent researches, the inventors of the present invention have found couplers represented by the following formulae (I)-(VII) solves the above problems. Specifically, the present invention provides yellow couplers represented by the following formulae (I)-(IV):
In the formulae, R
1
represents an acyl group, cyano group, nitro group, aryl group, heterocyclic residue, alkoxycarbonyl group, aryloxycarbonyl group, carbamoyl group, sulfamoyl group, alkylsulfonyl group, or arylsulfonyl group, each of which may have a substituent. R
2
represents an alkyl group, aryl group or heterocyclic residue, each of which may have a substituent. R
3
represents an aryl group or heterocyclic residue, each of which may have a substituent. R
4
represents a substituent. n represents an integer of 0 to 2. If n is 2, a plurality of R
4
's may be the same or different from each other. L represents a divalent linking group. k represents an integer of 0 or more, and if k is 2 or more, a plurality of L's may be the same linking groups or may be different from each other.
(2) Further, the present invention provides a dye-forming coupler represented by the following formula (V):
In the formula, R
4
represents a substituent. n represents an integer of 0 to 2. If n is 2, a plurality of R
4
's may be the same or different from each other. R
5
represents a hydrogen atom or substituent. R
6
represents a substituent. m represents an integer of 0 to 4, and if m is 2 or more, a plurality of R
6
's may be the same or different from each other, and two of them may be bonded together to form a ring. L represents a divalent linking group. k represents an integer of 0 or more, and if k is 2 or more, a plurality of L's may be the same or different from each other.
(3) Still further, the present invention provides a yellow coupler represented by formula (VI):
In the formula, R
4
represents a substituent. n represents an integer of 0 to 2. If n is 2 or more, a plurality of R
4
's may be the same or different from each other. R
6
represents a substituent. R
5
and R
7
independently represents a hydrogen atom or substituent. m represents an integer of 0 to 4. If m is 2 or more, a plurality of R
6
's may be the same or different from each other, and two of them may be bonded together to form a ring. L represents a divalent linking group. k represents an integer of 0 or more. If k is 2 or more, a plurality of L's may be the same or different from each other.
(4) Still further, the present invention provides a yellow coupler represented by formula (VII):
In the formula, R
4
represents a substituent. n represents an integer of 0 to 2. If n is 2 or more, a plurality of R
4
's may be the same or different from each other. R
6
and R
9
independently represents a substituent. R
5
and R
8
independently represents a hydrogen atom or substituent. m represents an integer of 0 to 4. If m is 2 or more, a plurality of R
6
's may be the same or different from each other, and two of them may be bonded together to form a ring. L represents a divalent linking group. k represents an integer of 0 or more. If k is 2 or more, a plurality of L's may be the same or different from each other. j represents an integer of 3 or less. If j is 2 or more, a plurality of R
9
's may be the same or different from each other, and two of them may be bonded together to form a ring.
(5) Further, the present invention provides a silver halide color photographic lightsensitive material containing at least one of the yellow couplers represented by the formulae (I) to (VII) described in the above items (1) to (4).
DETAILED DESCRIPTION OF THE INVENTION
The compounds (also referred to as “dye-forming couplers” in the present specification) represented by the formulae (I)-(IV) of the present invention will be described in detail.
In the formulae, R
1
is an acyl group, aryl group, heterocyclic residue, alkoxycarbonyl group, aryloxycarbonyl group, carbamoyl group, sulfamoyl group, alkylsulfonyl group, or arylsulfonyl group, each of which may have a substituent, or a cyano group or nitro group. Examples of the substituent which R
1
may have are halogen atom, alkyl group (including cycloalkyl group, and bicycloalkyl group), alkenyl group (including cycloalkenyl group, and bicycloalkenyl group), alkynyl group, aryl group, heterocyclic group, cyano group, hydroxyl group, nitro group, carboxyl group, alkoxy group, aryloxy group, silyloxy gro
Takeuchi Kiyoshi
Uehira Shigeki
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