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Dissymmetrical diazo compounds comprising 2-pyridinium group and a cationic or non-cationic linker, compositions comprising them, method for coloring, and device

A diazo compound, cationic technology, applied in the field of devices with multiple compartments

Inactive Publication Date: 2006-07-12
LOREAL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While these compounds represent an advance in the state of the art, there is still room for improvement in their staining results

Method used

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  • Dissymmetrical diazo compounds comprising 2-pyridinium group and a cationic or non-cationic linker, compositions comprising them, method for coloring, and device
  • Dissymmetrical diazo compounds comprising 2-pyridinium group and a cationic or non-cationic linker, compositions comprising them, method for coloring, and device
  • Dissymmetrical diazo compounds comprising 2-pyridinium group and a cationic or non-cationic linker, compositions comprising them, method for coloring, and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0409] Synthesis of Compound 4 : 5-bromo-2-{(E)-[4-(dimethylamino)-2-hydroxyphenyl]diazenyl}-1-[3-(2-{(E)-[4- Synthesis of (Dimethylamino)phenyl]diazenyl}pyridinium-1-yl)propyl]pyridinium dibromide

[0410]

[0411] compound 4

[0412] step 1

[0413]

[0414] Compound 1 is a commercially available compound.

[0415] Compound 1 (30 g) was stirred in 350 ml toluene at 100° C. for 14 hours in the presence of 68 ml 1,3-dibromopropane in a three-necked flask with a fixed top condenser.

[0416] After the reaction, the reaction mixture was cooled to ambient temperature and poured into ethyl acetate (500 mL). The resulting precipitate was isolated by filtration, washed several times with ethyl acetate and finally dried in vacuo. 44 mg of dark purple powder corresponding to compound 2 were obtained.

[0417] Analyze according to expected product.

[0418] step 2

[0419]

[0420] Compound 3 is a commercially available product.

[0421] In a three-necked flask wi...

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Abstract

Disclosed herein are dissymmetrical cationic diazo compounds comprising a 2-pyridinium group and a cationic or non-cationic linker. Also disclosed herein are dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, a method for coloring keratin fibers comprising contacting the keratin fibers with such dyeing compositions, and a device comprising a plurality of compartments.

Description

technical field [0001] The invention relates to asymmetric cationic diazo compounds containing a 2-pyridinium group and a cationic or non-cationic linking group, dyeing compositions containing said compounds as direct dyes in a medium suitable for dyeing keratin fibers, the use of the combination Method for dyeing keratin fibers, and device with multiple compartments. Background technique [0002] The dyeing of keratin fibers, in particular human keratin fibers such as hair, using dyeing compositions comprising direct dyes is known. These compounds are colored or dyed molecules that have an affinity for the fibers. For example, the practice of using direct dyes of the nitrobenzene type, anthraquinone dyes, nitropyridines and dyes of the azo, xanthene, acridine, azine or triarylmethane type is known. [0003] These dyes are usually applied to the fibers, optionally in the presence of an oxidizing agent, if at the same time the fibers are desired to be shiny. Once the expos...

Claims

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Application Information

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IPC IPC(8): C07D213/76C07D213/04C07D401/14C09B44/12A61K8/40A61K8/49A61Q5/10
CPCC07D401/14C07D213/77C07D401/06C07D401/12
Inventor H·戴维A·格里夫斯N·多布雷斯
Owner LOREAL SA
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