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Symmetrical diazo compounds, compositions comprising them, method of coloring, and device

A diazo compound, symmetrical technology, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problem that the dyeing effect needs to be improved

Inactive Publication Date: 2007-01-10
LOREAL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These compounds, although representing a technological advance, still leave room for improvement in the resulting dyeing results

Method used

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  • Symmetrical diazo compounds, compositions comprising them, method of coloring, and device
  • Symmetrical diazo compounds, compositions comprising them, method of coloring, and device
  • Symmetrical diazo compounds, compositions comprising them, method of coloring, and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0429] Synthesis of compound 2:

[0430]

[0431] In the presence of 8 ml of 1,6-dibromohexane, compound 1 (Interchim commercial compound, 22.6 g) was reacted in 200 ml of dimethylformamide at 110° C. for 48 hours. It was then allowed to return to ambient temperature and the reaction mixture was poured into 500 ml of diisopropyl ether. The resulting precipitate was filtered off and dried under vacuum. A purple powder corresponding to the compound of structure 2 was obtained.

[0432] 1H NMR and mass spectrometry were consistent with the expected product.

[0433] Synthesis of compound 3:

[0434]

[0435] In the presence of 8 ml of 1,5-dibromopentane, compound 1 (Interchim commercial compound, 22.6 g) was reacted at 110° C. for 4 hours in 150 ml of dimethylformamide. It was then allowed to return to ambient temperature and the reaction mixture was poured into 500 ml of diisopropyl ether. The resulting precipitate was filtered off and dried under vacuum. A purple po...

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Abstract

The present disclosure relates to symmetrical cationic diazo compounds of formula (I), the resonance forms, and also the acid addition salts and / or the solvates thereof: (see formula I) wherein W1radicals, which are identical, represent a hydrogen, halogen atom selected from bromine, chlorine, fluorine, preferably from chlorine or fuorine, an -NR5R6, OR7, -NR4-Ph-NR5R6, -NR4-Ph-OR7, -O-Ph-OR7, -O-Ph-NR5R6 group, wherein L represents a cationic or non-cationic linker for linking the two cationic or non-cationic identical azo chromophores. The present disclosure further relates to dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, and also to a method of coloring keratin fibers that employs this composition, and a multi-compartment kit containing such compositions.

Description

technical field [0001] The present invention relates to symmetrical cationic diazo compounds containing a 2-pyridinium group and a cationic or non-cationic linker, and also to dyeing compositions comprising such compounds as direct dyes in a medium suitable for dyeing keratin fibres, It also relates to a method for dyeing keratin fibers using the composition, and also to a device with a plurality of compartments. Background technique [0002] The dyeing of keratinous fibers, in particular human keratinous fibers, such as hair, with dyeing compositions comprising direct dyes is known. These compounds are colored and are molecules that can be colored and have an affinity for fibers. For example, the use of nitrobenzene type, anthraquinone dyes, nitropyridine type and azo dyes, xanthene, acridine, azine or triarylmethane type direct dyes are well known methods. [0003] Usually these dyes are used in fibers, optionally in the presence of an oxidizing agent, if the fibers are ...

Claims

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Application Information

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IPC IPC(8): C07D213/76C07D213/04C07D401/14C07D471/06C09B44/12A61K8/40A61K8/49A61Q5/10
CPCC07D401/14C09B44/126C09B44/101C07D471/06C07D213/77C07D401/06C07D401/12
Inventor H·戴维A·格里夫斯N·多布雷斯
Owner LOREAL SA
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