Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
  • C09B23/0091—Methine or polymethine dyes, e.g. cyanine dyes having only one heterocyclic ring at one end of the methine chain, e.g. hemicyamines, hemioxonol
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
  • A61K8/494—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with more than one nitrogen as the only hetero atom
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/06—Preparations for styling the hair, e.g. by temporary shaping or colouring
  • A61Q5/065—Preparations for temporary colouring the hair, e.g. direct dyes
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/10—Preparations for permanently dyeing the hair
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
  • C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups

Definitions

• Cationic pyrazolone dyes process for their preparation and colorants for keratin fibers containing these compounds
• the present invention relates to novel cationic pyrazolone dyes, to a process for their preparation and to dyes containing these compounds for keratin fibers, in particular hair.
• oxidation dyes which are formed by oxidative coupling of one or more developer components with one or more coupler components, or substantive dyes are used.
• oxidation-stable, direct-acting dyes can be added to the oxidative system in order to achieve special color effects.
• Direct dyes are incorporated into suitable carrier masses to be applied to the fiber. This method, commonly known as tinting, is easy to use, exceptionally mild, and is characterized by little damage to the keratin fiber when no ammonia or peroxide is added. However, the dyes used here must meet some requirements.
• the object of the present invention is therefore to provide substantive dyes for dyeing keratin fibers, in particular human hair, which fulfill these requirements in an outstanding manner.
• cationic pyrazolone dyes of the general formula (I) as substantive dyes in non-oxidative colorants enable very gentle dyeing of keratin fibers.
• the present invention therefore relates to cationic pyrazolone dyes of the general formula (I)
• Ri and R 2 independently of one another are one of the formulas (II), (III), (IV), (V) or (VI),
• R 3 represents a CiC 6 alkyl group, a CiC 6 -Alkylcyanooeuvre, a hydroxyl group, a methoxymethyl group, a 6 CiC - ⁇ /, / V-dialkylamino group, a carboxylic acid amide group, a sulfonic acid alkyl CiC ⁇ , a sulfonic acid group, a sulfonic acid ester group, a carboxylic acid group, a carboxylic acid ester group, an amino group, a sulfonic acid amide group, a methyl group, a / so-propyl group, a fe / f-butyl group or a phenyl group, preferably a carboxylic acid group, a carboxylic acid ester group or an amino group, and especially a methyl group; R 4 is a hydrogen atom, a C 1 -C 6 -alkylamino group, a C 1 -C 6
• R 5 ⁇ represents a hydrogen atom, a Ci-C alkylamino group, a C I -C 6 - / V, ⁇ / dialkylamino group, a Ci-C 6 -Alkylcyanooeuvre, a Hydroxyl ⁇ group, a nitro group, a methoxymethyl group, a tert-butyl group, a / so-propyl group, a Ci-C 6 alkyl group, a Ci-C 6 alkyl xyoeuvre, a CrC ⁇ hydroxyalkyl group, a Ci-C 6 -Alkylcarbonklare- group, a Ci-C ⁇ - Alkylcarbonklaeromial, a Ci-C ⁇ -alkyl sulfonic acid group, a Ci-C ⁇ -Alkylsulfonklaerlitis, an -N- (L) - (L) -B + group or a radical of the formulas (VII), (VIII)
• R ⁇ represents a branched or linear C 1 -C 6 -alkyl group, a branched or linear C 2 -C 4 -hydroxyalkyl group or a branched or linear C 4 -C 6 -polyhydroxyalkyl group;
• L is a Ci-C 6 alkylene group;
• B + represents the following radical groups: a) an aromatic heterocyclic quaternary ammonium compound,.
• quaternary compound of N-methylimidazole preferably a quaternary compound of N-methylimidazole, a quaternary compound of N-allylimidazole, a quaternary compound of 2-ethylimidazole, a quaternary compound of 1,2-dimethylimidazole, a quaternary compound of pyridine, a quaternary one Compound of 4-dimethylaminopyridine, a quaternary compound of pyrimidine, a quaternary compound of pyrazole, a quaternary compound of N-methyl-pyrazole or a quaternary compound of quinoline; or b) a non-aromatic heterocyclic quaternary ammonium compound, in particular a quaternary compound of N-methylmorpholine, a quaternary compound of N-ethylmorpholine or a quaternary compound of 1-methylpiperidine; or c) a quaternary Alky
• X is an anion, provided that at least one of Ri and R 2 is the same as a cationic group.
• the following anions are preferably used as counterions X.sup.-: sulfate anions, phosphate anions, hydrogenphosphate anions, oxalate anions, formate anions, acetate anions, citrate anions, tartrate anions, malonate anions, pyruvate anions or iodide anions, with chloride anions, bromide anions and methylsulfate anions being particularly preferred.
• Suitable cationic direct-drawers of the general formula (I) which may be mentioned are: 2 - ⁇ (4E) -4- [4- (dimethylamino) benzylidene] -3-methyl-5-oxo-4,5-dihydro-1 / / -pyrazol-1-yl ⁇ -1-methylpyridinium methylsulfate, 2 - ⁇ (4E) -4- [4- (dimethylamino) benzylidene] -3-methyl-5-oxo-4,5-dihydro-1H -pyrazol-1-yl ⁇ -3-methyl-1,3-benzothiazol-3-ium-methyl sulfate, 2 - [(4E) -4- (4-hydroxybenzylidene) -3-methyl-5-oxo-4,5 -dihydro-1H-pyrazol-1-yl] -1-methylpyridinium methylsulfate, 2 - [(4E) -4-
• Preferred compounds of general formula (I) are: 2 - ⁇ (4E) -4- [4- (dimethylamino) benzylidene] -3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl ⁇ - 1-methylpyridinium methylsulfate, 2 - ⁇ (4E) -4- [4- (dimethylamino) benzylidene] - 3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl ⁇ - 3-methyl-1,3-benzothiazol-3-ium-methyl sulfate, 2 - [(4E) -4- (4-hydroxybenzylidene) -3-methyl-5-oxo-4,5-dihydro-1H-pyrazole 1 -yl] -1-methylpyridinium methylsulfate, 2 - [(4E) -4- (4-hydroxybenzylidene) -3-methyl-5-
• the dye derivatives of the general formula (I) according to the invention are obtainable by customary synthesis processes from commercially available or readily preparable components.
• the cationic dye is obtained in the final step according to Scheme 2 by quaternization of the heterocyclic nitrogen atoms with alkylating agents of general formula XR 6 , wherein X is chlorine, bromine, iodine or methyl sulfate, R 6 is a branched or linear Ci-C 6 alkyl group, a branched or linear C 2 -C 4 hydroxyalkyl group or a branched or linear C 4 -C 6 polyhydroxyalkyl group, and Q is any dye moiety.
• alkylating agents of general formula XR 6 , wherein X is chlorine, bromine, iodine or methyl sulfate, R 6 is a branched or linear Ci-C 6 alkyl group, a branched or linear C 2 -C 4 hydroxyalkyl group or a branched or linear C 4 -C 6 polyhydroxyalkyl group, and Q is any dye moiety.
• the cationic pyrazolone dyes of the general formula (I) according to the invention enable a uniform dyeing of fiber materials, in particular human hair, with a good stability against light, perspiration and shampooing.
• the compounds of general formula (I) according to the invention show an intensive, brilliant coloration of keratin fibers, in particular of human hair, but also wool, fur or other fiber materials, under mild conditions.
• Another object of the present invention is therefore an agent for dyeing Keratinfasem, in particular human hair, which is characterized in that it contains at least one cationic pyrazolone dye of the general formula (I).
• the cationic pyrazolone dyes of the general formula (I) are preferably present in the colorants according to the invention in an amount of from 0.01 to 10% by weight, in particular from 0.1 to 8% by weight.
• the colorant according to the invention may additionally comprise further known, directly coloring dyes from the group consisting of nitro dyes, azo dyes, anthraquinone dyes and Triphenylmethane dyes, such as 1, 4-bis [(2-hydroxyethyl) - ino] -2-nitrobenzene, 1- (2-hydroxyethyl) amino-2-n itro-4- [di (2-hydroxyethyl) amino ] -benzene, (HC Blue No. 2), 1-amino-3-methyl-4 - [(2-hydroxyethyl) amino] -6-nitrobenzene, (HC Violet No.
• directly coloring dyes from the group consisting of nitro dyes, azo dyes, anthraquinone dyes and Triphenylmethane dyes, such as 1, 4-bis [(2-hydroxyethyl) - ino] -2-nitrobenzene, 1- (2-hydroxyethyl) amino-2-n itro-4- [di (2-hydroxyeth
• the colorant according to the invention may further comprise all conventional additives known for such preparations, for example perfume oils, complexing agents, waxes, preservatives, thickeners, alginates, guar gum, hair-care substances, for example cationic polymers or lanolin derivatives, or anionic, nonionic, amphoteric or cationic surface-active agents Contain substances.
• perfume oils for example perfume oils, complexing agents, waxes, preservatives, thickeners, alginates, guar gum, hair-care substances, for example cationic polymers or lanolin derivatives, or anionic, nonionic, amphoteric or cationic surface-active agents Contain substances.
• amphoteric or nonionic surfactants for example betaine surfactants, propoinates and glycinates, such as cocoamphoglycinates or cocoamphodiglacinates
• amphoteric or nonionic surfactants are ethoxylated surfactants having from 1 to 1000 ethylene oxide units, preferably from 1 to 300 ethylene oxide units, such as glyceride alkoxylates, for example 25 ethylene oxide Units ethoxylated castor oil, polyglycolamides, ethoxylated alcohols and ethoxylated fatty alcohols (fatty alcohol alkoxylates) and ethoxylated fatty acid sugar esters, in particular ethoxylated sorbitan fatty acid esters used.
• the above ingredients are used in the usual amounts for such purposes, for example, the surfactants in a concentration of 0.1 to 30 weight percent, and the conditioners in an amount of 0.1 to 5 weight percent.
• the colorant according to the invention can be in the form of an aqueous or aqueous-alcoholic solution, a cream, a gel, an emulsion or an aerosol foam, the hair colorant being in the form of a one-component preparation or in the form of a multicomponent preparation, for example in the form of a two-component preparation in which the respective dye derivative of general formula (I) is packaged separately from the other constituents and the production of the ready-hair dye is done only immediately before use by mixing the two components, can be made up.
• the colorant according to the invention has a pH of about 2 to about 10, preferably from 5 to 10, and in particular a neutral to basic pH of 7 to 9, on.
• a pH according to the invention both organic and inorganic acids or bases are suitable.
• Suitable acids include, in particular, the following acids: ⁇ -hydroxycarboxylic acids, for example glycolic acid, lactic acid, tartaric acid, citric acid or malic acid, ascorbic acid, gluconic acid lactone, acetic acid, hydrochloric acid or phosphoric acid, and mixtures of this acid.
• Suitable bases are, in particular, sodium carbonate, sodium hydrogencarbonate, alkanolamines, for example monoethanolamine or triethanolamine, ammonia, aminomethylpropanol and sodium hydroxide.
• the application of the dyeing agent according to the invention is usually carried out by applying a sufficient amount of hair coloring, depending on the hair length about 30 to 120 grams of the hair dye on the hair, the hair dye at about 15 to 45 degrees Celsius for about 1 to 60 minutes, preferably 5 to 30 minutes, then the hair is rinsed thoroughly with water, optionally with a shampoo washes and finally dried.
• the colorant described above may further comprise natural or synthetic polymers customary for cosmetic products modified polymers containing natural origin, whereby at the same time with the coloring, a strengthening of the hair is achieved.
• Such agents are generally referred to as tinting or color strengthening agents.
• polyvinylpyrrolidone polyvinyl acetate, polyvinyl alcohol or polyacrylic compounds such as polyacrylic acid or polymethacrylic acid, basic polymers of esters of polyacrylic acid, polymethylacrylic acid and amino alcohols, for example their salts or quaternization, polyacrylonitrile, polyvinyl acetates and copolymers of such compounds such as polyvinylpyrrolidone-vinyl acetate
• natural polymers or modified natural polymers for example, chitosan (deacetylated chitin) or chitosan derivatives can be used.
• the abovementioned polymers can be present in the colorant according to the invention in the amounts customary for such compositions, in particular in an amount of about 1 to 5 percent by weight.
• the pH of the tinting or dyeing agent of the present invention is preferably about 7 to 9.
• the application of the hair dye with additional strengthening takes place in a known and customary manner by moistening the hair with the setting agent, fixing (inserting) the hair to the hairstyle and subsequent drying.
• the colorant according to the invention enables uniform, intensive and permanent staining of keratin fibers (for example human hair, wool or fur) with no noticeable staining of the skin or scalp, which survives five or more washes without noticeable fading of the hair color.
• keratin fibers for example human hair, wool or fur
• the following examples are intended to illustrate the subject matter of the invention without limiting it thereto.
• Step 2 Preparation of 2 - ((4E) -4 - ⁇ [4- (dimethylamino) phenyl] methylidene ⁇ -3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl) -3-methyl-1,3-benzothiazol-3-ium methylsulphate
• Step 1 Preparation of (4E) -2- (1,3-benzothiazol-2-yl) -4 - ⁇ [4-hydroxy-3- (methyloxy) phenyl] methylidene ⁇ -5-methyl-2,4-dihydro 3H-pyrazol-3-one
• Step 2 Preparation of 2 - ((4E) -4 - ⁇ [4-hydroxy-3- (methyloxy) phenyl] methylidene ⁇ -3-methyl-5-oxo-4,5-dihydro-1H-pyrazole 1 -yl) -3-methyl-1,3-benzothiazol-3-ium-methyl sulfate
• Step 1 Preparation of (4E) -4- [4- (dimethylamino) benzylidene] -5-methyl-2- (2-pyridinyl) -2,4-dihydro-3H-pyrazol-3-one ⁇ , 3 g ( 7.42 mmol) of 5-methyl-2- (2-pyridinyl) -2,4-dihydro-3H-pyrazol-3-one and 1.68 g (11. 13 mmol) of 4- (dimethylamino) benzaldehyde are added Add 3 ml of piperidine in absolute ethanol for 2 hours under reflux. The mixture is then diluted with water and the orange-red precipitate is filtered off, then washed with water and dried in vacuo.
• Step 2 Preparation of 2 - ⁇ (4E) -4- [4- (dimethylamino) benzylidene] -3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl ⁇ -1-methylpyridinium methylsulfate
• Step 2 Preparation of 2 - [(4E) -4- (4-hydroxy-3-methyloxybenzylidene) -3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl] -1 - methylpyridinium methyl sulfate
• Example 7 Preparation of 2 - ((4E) -4 - ⁇ (2E) -3- [4- (dimethylamino) phenyl] -2-propen-1-ylidyl ⁇ -3-methyl-5-oxo-4,5 -dihydro-1H-pyrazol-1-yl) -3-methyl-1,3-benzothiazol-3-ium-methyl sulfate
• Step 1 Preparation of (4E) -2- (1, 3-benzothiazol-2-yl) -4 - ⁇ (2E) -3- [4- (dimethylamino) phenyl] -2-propen-1-ylidene ⁇ -5-methyl-2,4-dihydro-3H-pyrazol-3-one
• Step 2 Preparation of 2 - ((4E) -4 - ⁇ (2E) -3- [4- (dimethylamino) phenyl] -2-propen-1-ylidyl ⁇ -3-methyl-5-oxo-4,5 -dihydro-1H-pyrazol-1-yl) -3-methyl-1,3-benzothiazol-3-ium-methyl sulfate
• the above colorant is adjusted to a pH of 6 to 7.
• the hair coloring is done by applying a sufficient amount of dye for the hair coloring on the hair, after a

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