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Development suppressing group-releasing magenta color coupler

A coupler and group technology, applied in the field of silver halide color photosensitive negative materials, can solve the problems of slow release rate of development inhibitor and high synthesis cost, improve image granularity and color reproducibility, low synthesis cost, coupling Highly active effect

Inactive Publication Date: 2005-06-22
沈阳感光化工研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also defects in these DIR couplers with timing bases-the synthesis cost is relatively high
At the same time, the development inhibitor release rate is slow
Therefore, problems remain in adequately improving color reproduction and sharpness effects

Method used

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  • Development suppressing group-releasing magenta color coupler
  • Development suppressing group-releasing magenta color coupler
  • Development suppressing group-releasing magenta color coupler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (Illustrative Compound MCP-ZB): 1-(2,4,6-Trichlorophenyl)-3-[3-[(2,4-Dipentylphenoxy)acetamido]benzamido ]-4-[[5-[(4-methylphenoxy)methyl]-1,3,4-oxadiazol-2-yl]mercapto]-5-pyrazolone.

[0030] 1. Intermediates

[0031] 1-(2,4,6-Trichlorophenyl)-3-[3-(2,4-Di-t-pentylphenoxy)acetamido]benzamido-4-bromo-5-pyrazolone preparation.

[0032] Reaction formula:

[0033]

[0034] (referred to as MCP parent compound)

[0035]

[0036] (referred to as MCP parent bromide)

[0037] Operation method:

[0038] In a 250 ml three-neck flask equipped with a stirrer and a thermometer, add 20 g of the MCP parent compound and 60 ml of DMF (dimethylformamide), cool the temperature of the reaction bottle to 0-5°C, add 1.44 ml of bromine dropwise, and then add 1.44 ml of bromine dropwise for half an hour After the internal dropwise addition is completed, the temperature is naturally raised to room temperature, and the reaction is continued fo...

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Abstract

The invention discloses a magenta coupler that releases a development inhibiting group. The general structural formula of the compound is: ∴ where: R 1 is the anti-diffusion base, R 2 is a halogen atom or an aromatic group with other substituents, and PUG is a development inhibiting group. The present invention is used in color photosensitive materials. Under certain conditions, PUG can be cracked from the molecules of the coupler of the product, and can be used to improve the image granularity and color reproducibility of the silver halide negative photosensitive material layer, thereby The image quality is greatly improved; in addition, the synthesis cost is relatively low, the development inhibitor is released quickly, and it is better in improving color reproduction and definition.

Description

technical field [0001] The invention relates to a silver halide color photosensitive negative material, in particular to a color coupler releasing a development inhibiting base product. Background technique [0002] When the coupler reacts with the oxide of the developer, the inhibitor released has an improving effect on the image quality of the photosensitive material. The DIR compounds mentioned in US, 3,227,554, 3,933,500, 3,701,783, 3,617,291, 3,379,529, 3,620,746; JPK57-155537 all have the effect of improving image quality, but in terms of color reproducibility, the performance of these compounds is still insufficient. [0003] In JPK57-151944, JPK1-280755 and US4782012, CN106, 455 and other patents, hydrolyzed DIR compounds have been proposed, which can improve image clarity and color reproducibility, but these DIR couplers cannot be coupled to couplers after development. Reduced activity. [0004] In order to enhance the image edge effect and interlayer effect, some...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03C7/26G03C7/305
Inventor 修煜李善柱欧阳贵平陈学慧范天奕罗鸿椾许丽
Owner 沈阳感光化工研究院有限公司
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