USRE41549E1 - Dyes for keratin fibers, the dyes containing n-benzyl-p-phenylenediamine derivatives and novel n-benzyl-p-phenylenediamine derivatives - Google Patents

Dyes for keratin fibers, the dyes containing n-benzyl-p-phenylenediamine derivatives and novel n-benzyl-p-phenylenediamine derivatives Download PDF

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USRE41549E1
USRE41549E1 US11/101,366 US10136601A USRE41549E US RE41549 E1 USRE41549 E1 US RE41549E1 US 10136601 A US10136601 A US 10136601A US RE41549 E USRE41549 E US RE41549E
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amino
hydroxy
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Laurent Chassot
Hans-Juergen Braun
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Wella International Operations Switzerland SARL
HFC Prestige International Operations Switzerland SARL
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
    • C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
    • C07D295/12—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms
    • C07D295/135—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms with the ring nitrogen atoms and the substituent nitrogen atoms separated by carbocyclic rings or by carbon chains interrupted by carbocyclic rings
    • 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
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/34—Alcohols
    • A61K8/347—Phenols
    • 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
    • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
    • A61K8/41—Amines
    • A61K8/411—Aromatic amines, i.e. where the amino group is directly linked to the aromatic nucleus
    • 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
    • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
    • A61K8/41—Amines
    • A61K8/415—Aminophenols
    • 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
    • A61K8/4906—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with one nitrogen as the only hetero atom
    • A61K8/4926—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with one nitrogen as the only hetero atom having six membered rings
    • 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
    • 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
    • A61K8/4973—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with oxygen 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
    • A61Q5/10—Preparations for permanently dyeing the hair
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C211/00—Compounds containing amino groups bound to a carbon skeleton
    • C07C211/43—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
    • C07C211/44—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring
    • C07C211/49—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton
    • C07C211/50—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton with at least two amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
    • C07C211/51—Phenylenediamines
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C211/00—Compounds containing amino groups bound to a carbon skeleton
    • C07C211/43—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
    • C07C211/44—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring
    • C07C211/52—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring the carbon skeleton being further substituted by halogen atoms or by nitro or nitroso groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C211/00—Compounds containing amino groups bound to a carbon skeleton
    • C07C211/43—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
    • C07C211/44—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring
    • C07C211/53—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having the nitrogen atom of at least one of the amino groups further bound to a hydrocarbon radical substituted by amino groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C215/00—Compounds containing amino and hydroxy groups bound to the same carbon skeleton
    • C07C215/46—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton
    • C07C215/48—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with amino groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by carbon chains not further substituted by hydroxy groups
    • C07C215/50—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with amino groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by carbon chains not further substituted by hydroxy groups with amino groups and the six-membered aromatic ring, or the condensed ring system containing that ring, bound to the same carbon atom of the carbon chain
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C217/00—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton
    • C07C217/54—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton
    • C07C217/56—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with amino groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by carbon chains not further substituted by singly-bound oxygen atoms
    • C07C217/58—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with amino groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by carbon chains not further substituted by singly-bound oxygen atoms with amino groups and the six-membered aromatic ring, or the condensed ring system containing that ring, bound to the same carbon atom of the carbon chain
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C233/00—Carboxylic acid amides
    • C07C233/01—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
    • C07C233/34—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by amino groups
    • C07C233/42—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by amino groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by a carbon atom of a six-membered aromatic ring
    • C07C233/43—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by amino groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by a carbon atom of a six-membered aromatic ring having the carbon atom of the carboxamide group bound to a hydrogen atom or to a carbon atom of a saturated carbon skeleton

Definitions

  • oxidation dyes have achieved considerable importance.
  • the dyeing results here from the reaction of certain developers with couplers in the presence of a suitable oxidizing agent.
  • developers especially 2,5-diaminotoluene, 2,5-diaminophenylethyl alcohol, p-aminophenol and 1,4-diaminobenzene are used here, while as couplers, resorcinol, 4-chlororesorcinol, 1-naphthol, 3-aminophenol and derivatives of m-phenylenediamine, for example, are named.
  • Oxidation dyes which are used for dyeing human hair, must satisfy numerous requirements, in addition to dyeing in the desired intensity.
  • the dyes must be safe from a toxicological and dermatological point of view and the hair dyeings achieved must have good light fastness, permanent waving fastness, acid resistance and crocking fastness. In any case, such dyeings must remain stable for a period of at least 4 to 6 weeks without the action of light, rubbing and chemical agents.
  • it is necessary that a broad range of different color nuances can be produced by combining suitable developers and couplers.
  • agents which contain a particular N-benzyl-p-phenylenediamine, such as N-benzyl-p-phenylenediamine, N4-benzyl-1,4-diamino-2-methylbenzene and 2-(((4-aminophenyl)amino) methyl)-4,6-dichloro-phenol, are already known for dyeing hair.
  • these compounds do not fulfill the requirements, which must be met by dyes for oxidation dyes, in every respect. There is therefore a continuing need for further, suitable, new dyes.
  • the object of the present invention therefore is an agent for oxidatively dyeing keratin fibers, such as wool, fur, feathers or hair, especially human hair, on the basis of a combination of developer and coupler, which contains, as developer, at least one N-benzyl-p-phenylenediamine derivative of Formula (I), in which
  • N-benzyl-p-phenylenediamine derivatives of Formula (I) are particularly preferred: N-((3-hydroxyphenyl)methyl)-1,4-diaminobenzene; N-((4-aminophenyl)methyl)-1,4-diaminobenzene; N-((4-hydroxyphenyl)-methyl)-1,4-diaminobenzene; N-((2-methoxyphenyl)methyl)-1,4-diaminobenzene; N-((4-hydroxy-3,5-dimethyl-phenyl)methyl)-1,4-diaminobenzene; N-((4-(2-hydroxyethoxy)-phenyl)methyl)-1,4-diaminobenzene; N-benzo[1,3]dioxol-5-ylmethyl-1,4-diaminobenzene; N- ⁇ 4-[(4-aminophenylamino)-methyl]
  • the compounds of Formula (I) can be used as free bases, as well as in the form of their physiologically compatible salts with inorganic or organic acids, such as hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, propionic acid, lactic acid or citric acid.
  • inorganic or organic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, propionic acid, lactic acid or citric acid.
  • N-benzyl-p-phenylenediamine derivatives of Formula (I) are contained in the inventive dyes in a total amount of about 0.005 to 20 percent by weight, amount of about 0.01 to 5 percent by weight and, in particular, of 0.1 to 2.5 percent by weight being preferred.
  • coupler substances preferably 2,6-diaminopyridine, 2-amino-4-[(2-hydroxyethyl)amino]-anisole, 2,4-diamino-1-fluoro-5-methylbenzene, 2,4-diamino-1-methoxy-5-methylbenzene, 2,4-diamino-1-ethoxy-5-methylbenzene, 2,4-diamino-1-(2-hydroxyethoxy)-5-methylbenzene, 2,4-di[(2-hydroxyethyl)amino]-1,5-dimethoxybenzene, 2,3-diamino-6-methoxy-pyridine, 3-amino-6-methoxy-2-(methylamino)-pyridine, 2,6-diamino-3,5-dimethoxy-pyridine, 3,5-diamino-2,6-dimethoxy-pyridine, 1,3-diaminobenzene, 2,4-diamino-1-(
  • the couplers and the developers may be contained in the inventive dyes in each case individually or in admixture with one another, the total amount of the couplers and the developers in the inventive dye (based on the total amount of the dye) in each case being about 0.005 to 20 percent by weight, preferably about 0.01 to 5.0 percent by weight and particularly 0.1 to 2.5 percent by weight.
  • the total amount of the combination of developer and coupler in the dye described here preferably is about 0.01 to 20 percent by weight, an amount of about 0.02 to 6 percent by weight and especially of 0.2 to 10 percent by weight being particularly preferred.
  • the developers and couplers generally are used in approximately equimolar amounts; in this connection, however, it is not disadvantageous if the developers or the couplers are present in a certain excess (such as a ratio of coupler to developer of 1:2 to 1:0.5).
  • inventive dye may additionally contain other dye components, such as 6-amino-2-methylphenol and 2-amino-5-methylphenol as well as conventional direct dyes, for example, triphenylmethane dyes such as 4-[(4′-aminophenyl)-(4′-imino-2′′,5′′-cyclohexadiene-1′′-ylidene)-methyl]-2-methylaminobenzene monohydrochloride (C.I.
  • aromatic nitro dyes such as 4-(2′-hydroxyethyl)amino-nitrotoluene, 2-amino-4,6-dinitrophenol, 2-amino-5-(2′-hydroxyethyl)amino-nitrobenzene, 2-chloro-6-(ethylamino)-4-nitrophenol, 4-chloro-N-(2-hydroxyethyl)-2-nitroaniline, 5-chloro-2-hydroxy-4-nitroaniline, 2amino-4-chloro-6-nitrophenol and 1-[(2′-ureidoethyl)amino-4-nitrobenzene, azo dyes such as the sodium salt of 6-[(4′-aminophenyl)azo]-5-hydroxy-naphthalene-1-sulfonic acid (C.I.
  • dispersion dyes such as, for example, 1,4-diaminoanthraquinone and 1,4,5,8-tetraaminoanthraquinone.
  • the aforementioned dye components may be contained in the inventive dyes in an amount of about 0.1 to 4 percent by weight.
  • the couplers and developers as well as the other dye components are bases, they may also be used in the form of their physiologically compatible salts with organic or inorganic assets, such as hydrochloric acid or sulfuric acid, or, if they have aromatic OH groups, in the form of the salts with bases, such as alkali phenolates.
  • inventive dyes if they are to be used to dye hair, may also contain other additives, conventionally used in cosmetic materials, for example, antioxidants, such as ascorbic acid, thioglycolic acid or sodium sulfite, as well as perfume oils, complexing agents, wetting agents, emulsifiers, thickeners and care materials.
  • the inventive dyes may be prepared in the form of a solution, especially an aqueous or aqueous alcoholic solution.
  • the especially preferred form of the preparation is a cream, a gel or an emulsion.
  • Its composition represents a mixture of the dye components with additives, which are usually employed for such preparations.
  • additives for solutions, creams, emulsions or gels are, for example, solvents such as water, low molecular weight aliphatic alcohols, such as ethanol, propanol or isopropanol, glycerin or glycols, such as 1,2-propylene glycol, wetting agents or emulsifiers of the anionic, cationic, amphoteric or nonionic class of surface active substances, such as fatty alcohol sulfates, ethoxylated fatty alcohol sulfates, alkyl sulfonates, alkylbenzene sulfonates, alkyltrimethylammonium salts, alkylbetaines, ethoxylated fatty alcohols, ethoxylated nonylphenoles, fatty acid alkanolamides and ethoxylated fatty acid esters, furthermore, thickeners such as higher molecular weight fatty alcohols, starch, cellulose derivatives, petroleum jelly, paraffin
  • the components mentioned are used in amounts, which a customary for such purposes; for example, the wetting agents and emulsifiers are used in concentrations of about 0.5 to 30 percent by weight, the thickness in an amount of about 0.1 to 25 percent by weight and the care materials in a concentration of about 0.1 to 5 percent by weight.
  • the inventive dye may be slightly acidic, neutral or alkaline. In particular, it has a pH of 6.5 to 11.5, the adjustment to a basic pH preferably being made with ammonia.
  • organic amines such as monoethanolamine and triethanolamine
  • inorganic bases such as sodium hydroxide and potassium hydroxide may also be used.
  • inorganic organic acids such as phosphoric acid, acetic acid, citric acid or tartaric acid comes into consideration.
  • the dyes, described above are mixed immediately before use with an oxidizing agent and an amount of dye, sufficient for the treatment, is applied on the hair. Generally, about 50 to 200 gram of this mixture is applied, depending on the fullness of the latter.
  • the ready-for-use oxidation dye, obtained upon mixing with the oxidizing agent preferably has a pH of 6.5 to 11.5.
  • oxidizing agents for developing the hair dyeing mainly hydrogen peroxide or its addition compounds with urea, melamine, sodium borate or sodium carbonate in the form of a 3 percent to 12 percent and preferably a 6 percent aqueous solution, also oxygen from the air. If a 6 percent hydrogen peroxide solution is used as oxidizing agent, the ratio by weight of hair dyeing agent to oxidizing agent is 5:1 to 1:2 and preferably 1:1. Larger amounts of oxidizing agent are used especially for higher concentrations of dye in the hair-dyeing agent or if greater bleaching of the hair is intended at the same time. The mixture is allowed to act on the hair for about 10 to 45 minutes and preferably for 30 minutes at 15° to 50° C.
  • the hair is then rinsed with water and dried.
  • the hair is washed with a shampoo and possibly rinsed with a weak organic acid, such as citric acid or tartaric acid. Subsequently, the hair is dried.
  • the inventive dye containing N-benzyl-p-phenylenediamine derivatives of Formula (I) as developer, makes dyeings possible with excellent color fastness, especially as far as light fastness, wash fastness and crock fastness are concerned.
  • the inventive dyeing agent offers a wide range of different color nuances, ranging from blond, brown, purple and violet to blue and black color shades, depending on the nature and composition of the dye components. The shades of color are distinguished here especially by their color intensity.
  • the very good dyeing properties of the dye of the present invention are furthermore shown by the fact that this material enables even grayish hair, which has not previously been damaged chemically, to be dyed without problems and with good covering power.
  • inventive N-benzyl-p-phenylenediamine derivatives of Formula (I) can be synthesized using known methods, such as the methods described in the examples.
  • N-benzyl-p-phenylenediamine derivatives of Formula (I) are readily soluble in water and make dyeings possible with a high color intensity and excellent color fastness, especially as far as light fastness, wash fastness and crock fastness are concerned. They furthermore have an excellent shelf life, especially as a component of the oxidation dyes, which are described here.
  • the solvent is evaporated in a rotary evaporator and the residue purified on silica gel with petroleum ether/ethyl acetate (9:1).
  • the product, so obtained, is heated to 50° C. in 4 mL of ethanol and 1.5 mL of a 2.9 molar ethanolic hydrochloric acid solution.
  • the precipitate is filtered off, washed twice with 1 mL of ethanol and then dried.
  • the reaction mixture is poured into 10 mL of ethyl acetate and the organic phase is extracted with sodium hydrogen carbonate and then dried with magnesium sulfate.
  • the solvent is evaporated in a rotary evaporator and the residue purified on silica gel with petroleum ether/ethyl acetate (9:1).
  • the product, so obtained, is heated to 50° C. in 4 mL of ethanol and 1.5 mL of a 2.9 molar ethanolic hydrochloric acid solution.
  • the precipitate is filtered off, washed twice with 1 mL of ethanol and then dried.
  • a mixture of 0.038 g (0.15 mmoles) of t-butyl N-(4-amino-2(2-hydroxyethyl)-phenyl) carbamate and N-(4-amino-3-(2-hydroxyethyl)-phenyl) carbamate and 0.1 mmoles of the appropriate aldehyde are dissolved in 1,2-dichloroethane. Subsequently, 0.1 mL of an acetic acid solution (1 molar in 1,2-dichloroethane) and 0.06 g of NaBH(OAc) 3 (0.3 mmoles) are added and the reaction mixture is stirred for 5 to 15 hours at room temperature (20° to 25° C.).
  • the reaction mixture is poured into 10 mL of ethyl acetate and the organic phase is extracted with sodium hydrogen carbonate and then dried with magnesium sulfate.
  • the solvent is evaporated in a rotary evaporator and the residue purified on silica gel with petroleum ether/ethyl acetate (9:1).
  • the product, so obtained, is heated to 50° C. in 4 mL of ethanol and 1.5 mL of a 2.9 molar ethanolic hydrochloric acid solution.
  • the precipitate is filtered off, washed twice with 1 mL of ethanol and then dried.
  • developer substance of Formula (I) of Table 1 1.25 mmoles coupler of Table 1 1.0 g potassium oleate (8% aqueous solution) 1.0 g ammonia (22% aqueous solution) 1.0 g ethanol 0.3 g ascorbic acid ad 100.0 g water
  • the above dye solution (50 g) is mixed with 50 g of a 6 percent aqueous hydrogen peroxide solution. Subsequently, the mixture is applied on bleached hair. After a period of action of 30 minutes at 40° C., the hair is rinsed with water, washed with a conventional, commercial shampoo and dried.
  • the resulting dye means are summarized in Table 1.
  • Example blond blue purple blue-gray 1j 14. of Example dark blond blue purple blue-gray 1k 15. of Example brown blue purple- blue-gray 1l blue 16. of Example dark blond blue dark blue 1m purple 17. of Example light blond blue-gray purple purple 1n 18. of Example light blond blue purple blue 1o 19. of Example medium blue purple blue 1p blond 20. of Example dark blond blue purple violet 1q 21. of Example light blond blue purple violet 1r 22. of Example light blond blue purple violet 1s 23. of Example light blond blue purple light violet 1t 24. of Example light blond blue purple light violet 1u 25. of Example medium blue purple violet 2a blond 26. of Example blond blue purple violet 2b 27.
  • the above dye solution (30 g) is mixed with a 30 g of a 6 percent aqueous hydrogen peroxide solution. Subsequently, the mixture is applied on bleached hair. After a period of action of 30 minutes at 40° C., the hair is rinsed with water, washed with a conventional, commercial shampoo and dried.
  • Table 5 The dyeing results are summarized in Table 5.
  • Creamy dye carrier compositions of the following composition are prepared:
  • the above dye cream (30 g) is mixed with 30 g of a 6 percent aqueous hydrogen peroxide solution. Subsequently, the mixture is applied on hair. After a period of action of 30 minutes at 40° C., the hair is reduced with water, washed with a conventional, commercial shampoo and dried.
  • the dyeing results are summarized in Table 6.

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Abstract

Dyes, containing N-benzyl-p-phenylenediamine derivatives of the general formula (I) or their physiologically compatible salts,
Figure USRE041549-20100824-C00001
for keratin fibers, and new N-benzyl-p-phenylenediamine derivatives.

Description

This application is a REI of the U.S. application Ser. No. 10/049,667, filed on Jan. 1, 2002 (U.S. Pat. No. 6,689,174) which is a 371 of PCT/EP 01/03121 filed on Mar. 19, 2001.
The present invention relates to agents for oxidatively dyeing keratin fibers, especially human hair, on the basis of a combination of a developer and coupler, which contains N-benzyl-p-phenylenediamine derivatives as developer, as well as to new N-benzyl-p-phenylenediamine derivatives.
In the field of dyeing keratin fibers, especially of dyeing hair, oxidation dyes have achieved considerable importance. The dyeing results here from the reaction of certain developers with couplers in the presence of a suitable oxidizing agent. As developers, especially 2,5-diaminotoluene, 2,5-diaminophenylethyl alcohol, p-aminophenol and 1,4-diaminobenzene are used here, while as couplers, resorcinol, 4-chlororesorcinol, 1-naphthol, 3-aminophenol and derivatives of m-phenylenediamine, for example, are named.
Oxidation dyes, which are used for dyeing human hair, must satisfy numerous requirements, in addition to dyeing in the desired intensity. For example, the dyes must be safe from a toxicological and dermatological point of view and the hair dyeings achieved must have good light fastness, permanent waving fastness, acid resistance and crocking fastness. In any case, such dyeings must remain stable for a period of at least 4 to 6 weeks without the action of light, rubbing and chemical agents. In addition, it is necessary that a broad range of different color nuances can be produced by combining suitable developers and couplers.
From the German Offenlegungsschrift 34 32 214, agents, which contain a particular N-benzyl-p-phenylenediamine, such as N-benzyl-p-phenylenediamine, N4-benzyl-1,4-diamino-2-methylbenzene and 2-(((4-aminophenyl)amino) methyl)-4,6-dichloro-phenol, are already known for dyeing hair. However, these compounds do not fulfill the requirements, which must be met by dyes for oxidation dyes, in every respect. There is therefore a continuing need for further, suitable, new dyes.
It has now been found that, if N-benzyl-p-phenylenediamine derivatives of the general Formula (I) are used, intensive brown, blue and red color nuances are obtained.
The object of the present invention therefore is an agent for oxidatively dyeing keratin fibers, such as wool, fur, feathers or hair, especially human hair, on the basis of a combination of developer and coupler, which contains, as developer, at least one N-benzyl-p-phenylenediamine derivative of Formula (I),
Figure USRE041549-20100824-C00002
in which
    • R1 R1 is hydrogen, a (C1-C4) alkyl group or a hydroxy-(C1-C4) alkyl group,
    • R2 is hydrogen, a halogen atom (F, Cl, Br, I), a cyano group, a (C1-C4) alkoxy group, a hydroxy (C1-C4) alkoxy group, a (C1-C6) alkyl group, a (C1-C4) alkyl thioether group, a mercapto group, a nitro group, an amino group, a (C1-C4) alkylamino group, a di-(C1-C4) alkylamino group, a di-(hydroxy-(C1-C4)-alkyl) amino group, a (hydroxy-(C1-C4)-alkyl) amino group, a trifluoromethane group, a —C(O)CH3 group, a —C(O)CF3 group, an —Si(CH3)3 group, a hydroxy-(C1-C4) alkyl group, a dihydroxy-(C3-C4) alkyl group or a morpholino group
    • R3, R4 independently of one another are hydrogen, a halogen atom, a hydroxy group, a (C1-C4) alkoxy group, a hydroxy-(C1-C4) alkoxy group, a (C1-C6) alkyl group, a (C1-C4) alkyl thioether group, a mercapto group, an amino group, a (C1-C6) alkylamino group, a di-(C1-C6) alkylamino group, a di-(hydroxy-(C1-C4)-alkylamino group, a hydroxy-(C1-C4) alkylamino group, a trifluoromethane group, an acetamido group, a —C(O)CH3 group, a —C(O)CF3 group, an —Si(CH3)3 group, a hydroxy-(C1-C4) alkyl group or a dihydroxy-(C3-C4) alkyl group or R3 and R4 together form an —O—CH2—O— bridge and
    • R5 is hydrogen, a hydroxy group or a (C1-C6) alkyl group,
      with the proviso that
    • (i) at least one of the R2 to R5 groups is different from a hydrogen and
    • (ii) R1 is not hydrogen or a (C1-C4) alkyl group when R2=R4=R5=hydrogen and R3=chlorine.
The following, for example, can be mentioned as examples of compounds of Formula (I): N-((2-aminophenyl)methyl)-1,4-diaminobenzene, N-((3-aminophenyl)-methyl)-1,4-diaminobenzene, N-((3-hydroxyphenyl)methyl)-1,4-diaminobenzene, N-((4-aminophenyl)methyl)-1,4-diaminobenzene, N-((4-hydroxyphenyl)methyl)-1,4-diaminobenzene, N-((2-(1-hydroxyethoxy)-phenyl)-methyl)-1,4-diaminobenzene, N-((2-methoxyphenyl)methyl)-1,4-diaminobenzene, N-((3-(1-hydroxyethoxy)-phenyl)methyl)-1,4diaminobezene, N-((3-methoxyphenyl)methyl)-1,4-diaminobenzene, N-((4-hydroxy-3,5-dimethyl-phenyl)methyl)-1,4-diaminobenzene, N-((4-(1-hydroxyethoxy)-phenyl)methyl)-1,4-diaminobenzene, N-((4-methoxyphenyl)methyl)-1,4-diaminobenzene, N-((2-(2-hydroxyethylamino)-phenyl) methyl)-1,4-diaminobenzene, N-((2-(bis-(2-hydroxyethyl) amino)-phenyl)methyl)-1,4-diaminobenzene, N-((2-dimethylamino-phenyl)methyl)-1,4-diaminobenzene, N-((2-pyrrolidino-phenyl)methyl)-1,4-diaminobenzene, N-((3-(2-hydroxyethylamino)-phenyl)methyl)-1,4-diaminobenzene, N-((3-(bis-(2-hydroxyethyl)amino)-phenyl)methyl)-1,4-diaminobenzene, N-((3-dimethylaminophenyl)methyl)-1,4-diaminobenzene, N-((3-pyrrolidino-phenyl)methyl)-1,4-diaminobenzene, N-((4-(2-hydroxyethylamino)-phenyl)methyl)-1,4-diaminobenzene, N-((4-(bis-(2-hydroxyethyl)amino)-phenyl)methyl)-1,4-diaminobenzene, N-((4-dimethylamino-phenyl)methyl)-1,4-diaminobenzene, N-((4-pyrrolidino-phenyl)methyl)-1,4-diaminobenzene, N-benzo[1,3]dioxol-5-ylmethyl-1,4-diaminobenzene, N-benzo[1,3]dioxol-6-ylmethyl-1,4-diaminobenzene, N-{2-[(4-amino-phenylamino)-methyl]-phenyl}-acetamide, N-{3-[(4-amino-phenylamino)-methyl]-phenyl}-acetamide, N-{4-[(4-amino-phenylamino)-methyl]-phenyl}-acetamide, N-((2,3-diaminophenyl)methyl)-1,4-diaminobenzene, N-((2,3-dihydroxyphenyl)methyl)-1,4-diaminobenzene, N-((2,4-diaminophenyl)methyl)-1,4-diaminobenzene, N-((2,4-dihydroxyphenyl)methyl)-1,4-diaminobenzene, N-((2,5-diaminophenyl)methyl)-1,4-diaminobenzene, N-((2,5-dihydroxyphenyl)methyl)-1,4-diaminobenzene, N-((2,6-diaminophenyl)methyl)-1,4-diaminobenzene, N-((2,6-dihydroxyphenyl)methyl)-1,4-diaminobenzene, N-((2-hydroxy-3-aminophenyl)methyl)-1,4-diaminobenzene, N-((2-hydroxy-4-aminophenyl)methyl)-1,4-diaminobenzene, N-((2-hydroxy-5-aminophenyl)methyl)-1,4-diaminobenzene, N-((3-hydroxy-4-aminophenyl)methyl)-1,4-diaminobenzene, N-((3-hydroxy-5-aminophenyl)methyl)-1,4-diaminobenzene, N-((2-amino-3-hydroxyphenyl)methyl)-1,4-diaminobenzene, N-((2-amino-4-hydroxyphenyl)methyl)-1,4-diaminobenzene, N1-((2-aminophenyl)methyl)-2-(2-hydroxyethyl)-1,4-diaminobenzene, N1-((2-aminophenyl)methyl)-2-methyl-1,4-diaminobenzene, N1-((3-aminophenyl)methyl)-2-(2-hydroxyethyl)-1,4-diaminobenzene, N1-((3-aminophenyl)methyl)-2-methyl-1,4-diaminobenzene, N1-((3-hydroxyphenyl)methyl)-2-(2-hydroxyethyl)-1,4-diaminobenzene, N1-((3-hydroxyphenyl)methyl)-2-methyl-1,4-diaminobenzene, N1-((4-aminophenyl)methyl)-2-(2-hydroxyethyl)-1,4-diaminobenzene, N1-((4-aminophenyl)methyl)-2-methyl-1,4-diaminobenzene, N1-((4-hydroxyphenyl)methyl)-2-(2-hydroxyethyl)-1,4-diaminobenzene, N1-((4-hydroxyphenyl)methyl)-2-methyl-1,4-diaminobenzene, N4-((2-aminophenyl)methyl)-2-(2-hydroxyethyl)-1,4-diaminobenzene, N4-((2-aminophenyl)methyl)-2-methyl-1,4-diaminobenzene, N4-((3-aminophenyl)methyl)-2-(2-hydroxyethyl)-1,4-diaminobenzene, N4-((3-aminophenyl)methyl)-2-methyl-1,4-diaminobenzene, N4-((3-hydroxyphenyl)methyl)-2-(2-hydroxyethyl)-1,4-diaminobenzene, N4-((3-hydroxyphenyl)methyl)-2-methyl-1,4-diaminobenzene, N4-((4-aminophenyl)methyl)-2-(2-hydroxyethyl)-1,4-diaminobenzene, N4-((4-aminophenyl)methyl)-2-methyl-1,4-diaminobenzene, N4-((4-hydroxyphenyl)methyl)-2-(2-hydroxyethyl)-1,4-diaminobenzene, N4-((4-hydroxyphenyl)methyl)-2-methyl-1,4-diaminobenzene.
Compounds of Formula (I) are preferred in which
    • R1 and one of the groups R2 to R5 is hydrogen and/or
    • (ii) three of the R1 to R5 groups are hydrogen and the two remaining groups, independently of one another, represent hydrogen, a methoxy group, a hydroxy group or an amino group or, in the case of R3 and R4, jointly form an —O—CH2—O bridge, in which case R2 is not a hydroxy group and at least one of the R2 to R5 groups is not hydrogen.
The following N-benzyl-p-phenylenediamine derivatives of Formula (I) are particularly preferred: N-((3-hydroxyphenyl)methyl)-1,4-diaminobenzene; N-((4-aminophenyl)methyl)-1,4-diaminobenzene; N-((4-hydroxyphenyl)-methyl)-1,4-diaminobenzene; N-((2-methoxyphenyl)methyl)-1,4-diaminobenzene; N-((4-hydroxy-3,5-dimethyl-phenyl)methyl)-1,4-diaminobenzene; N-((4-(2-hydroxyethoxy)-phenyl)methyl)-1,4-diaminobenzene; N-benzo[1,3]dioxol-5-ylmethyl-1,4-diaminobenzene; N-{4-[(4-aminophenylamino)-methyl]-phenyl}-acetamide and N-((4-methoxyphenyl)-methyl)-1,4-diaminobenzene, as well as their physiologically compatible salts.
The compounds of Formula (I) can be used as free bases, as well as in the form of their physiologically compatible salts with inorganic or organic acids, such as hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, propionic acid, lactic acid or citric acid.
The N-benzyl-p-phenylenediamine derivatives of Formula (I) are contained in the inventive dyes in a total amount of about 0.005 to 20 percent by weight, amount of about 0.01 to 5 percent by weight and, in particular, of 0.1 to 2.5 percent by weight being preferred.
As coupler substances, preferably 2,6-diaminopyridine, 2-amino-4-[(2-hydroxyethyl)amino]-anisole, 2,4-diamino-1-fluoro-5-methylbenzene, 2,4-diamino-1-methoxy-5-methylbenzene, 2,4-diamino-1-ethoxy-5-methylbenzene, 2,4-diamino-1-(2-hydroxyethoxy)-5-methylbenzene, 2,4-di[(2-hydroxyethyl)amino]-1,5-dimethoxybenzene, 2,3-diamino-6-methoxy-pyridine, 3-amino-6-methoxy-2-(methylamino)-pyridine, 2,6-diamino-3,5-dimethoxy-pyridine, 3,5-diamino-2,6-dimethoxy-pyridine, 1,3-diaminobenzene, 2,4-diamino-1-(2-hydroxyethoxy)-benzene, 2,4-diamino-1,5-di(2-hydroxyethoxy)-benzene, 1-(2-aminoethoxy)-2,4-diaminobenzene, 2-amino-1-(2-hydroxyethoxy)-4-methylaminobenzene, 2,4-diaminophenoxyacetic acid, 3-[di(2-hydroxyethyl)amino]-aniline, 4-amino-2-di[(2-hydroxyethyl)amino]-1-ethoxybenzene, 5-methyl-2-(1-methylethyl)-phenol, 3-[(2-hydroxyethyl)amino]-aniline, 3-[(2-aminoethyl)-amino]-aniline, 1,3-di(2,4-diaminophenoxy)-propane, di(2,4-diaminophenoxy)-methane, 1,3-diamino-2,4-dimethoxybenzene, 2,6-bis(2-hydroxyethyl)amino toluene, 4-hydroxyindole, 3-dimethylaminophenol, 3-diethylaminophenol, 5-amino-2-methylphenol, 5-amino-4-fluoro-2-methylphenol, 5-amino-4-methoxy-2-methylphenol, 5-amino-4-ethoxy-2-methylphenol, 3-amino-2,4-dichlorophenol, 5-amino-2,4-dichlorophenol, 3-amino-2-methylphenol, 3-amino-2-chloro-6-methylphenol, 3-aminophenol, 2-[(3-hydroxyphenyl)amino]-acetamide, 5-[(2-hydroxyethyl)amino]-2-methylphenol, 3-[(2-hydroxyethyl)amino]-phenol, 3-[(2-methoxyethyl)-amino]-phenol, 5-amino-2-ethylphenol, 2-(4-amino-2-hydroxyphenoxy)-ethanol, 5-[(3-hydroxypropyl)amino]-2-methylphenol, 3-[(2,3-dihydroxypropyl)amino]-2-methylphenol, 3-[(2-hydroxyethyl)amino]-2-methylphenol, 2-amino-3-hydroxy-pyridine, 5-amino-4-chloro-2-methylphenol, 1-naphthol, 1,5-dihydroxy-naphthalene, 1,7-dihydroxy-naphthalene, 2,3-dihydroxy-naphthalene, 2,7-dihydroxy-naphthalene, 2-methyl-1-naphthol acetate, 1,3-dihydroxybenzene, 1-chloro-2,4-dihydroxybenzene, 2-chloro-1,3-dihydroxybenzene, 1,2-dichloro-3,5-dihydroxy-4-methylbenzene, 1,5-dichloro-2,4-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene, 3,4-methylenedioxy-phenol, 3,4-methylenedioxy-aniline, 5-[(2-hydroxyethyl)amino]-1,3-benzodioxol, 6-bromo-1-hydroxy-3,4-methylenedioxy-benzene, 3,4-diamino-benzoic acid, 3,4-dihydro-6-hydroxy-1,4(2H)-benzoxazine, 6-amino-3,4-dihydro-1,4(2H)-benzoxazine, 3-methyl-1-phenyl-5pyrazolone, 5,6-dihydroxy-indole, 5,6-dihydroxy-indoline, 5-hydroxy-indole, 6-hydroxy-indole, 7-hydroxy-indole and 2,3-indolinedione come into consideration.
Although the advantageous properties of the compounds of formula (I) described here suggest that these be used as the only developer, it is, of course, also possible to use these compounds together with known developers, such as 1,4-diaminobenzene, 2,5-diaminotoluene, 2,5-diaminophenylethanol, 4-aminophenol and its derivatives (for example, 4-amino-3-methylphenol), 4,5-diamino-1-benzyl-1H-pyrazole, 4,5-diamino-1-((4′-methylbenzyl)-1H-pyrazole, 4,5-diamino-1H-pyrazole, 4,5-diamino-1-(4′-methoxybenzyl)-1H-pyrazole, 4,5-diamino-1-(3′-methoxybenzyl)-1H-pyrazole, 4,5-diamino-1-(4′-chlorobenzyl)-1H-pyrazole, 4,5-diamino-1-((4′-methylphenyl)-1H-pyrazole, 4,5-diamino-1-(4′-methoxyphenyl)-1H-pyrazole, 4,5-diamino-1-(3′-methoxyphenyl)-1H-pyrazole, 4,5-diamino-1-(4′-chlorophenyl)-1H-pyrazole, 4,5-diamino-1-(2′-hydroxyethyl)-1H-pyrazole, 4,5-diamino-1-methyl-1H-pyrazole, 4,5-diamino-1-ethyl-1H-pyrazole, 4-amino-1-((4-methoxyphenyl)methyl)-5-(methylamino)-1H-pyrazole, 4-amino-5-((2-hydroxyethyl)amino)-1-(phenylmethyl)-1H-pyrazole, 4,5-diamino-1-methyl-3-phenyl-1H-pyrazole, 4,5-diamino-1-(2-hydroxyethyl)-3-phenyl-1H-pyrazole, 4,5-diamino-1,3-dimethyl-1H-pyrazole, 4,5-diamino-3-methyl-1-phenyl-1H-pyrazole, 4,5-diamino-1-(1-isopropyl)-1H-pyrazole or tetraaminopyrimidines.
The couplers and the developers may be contained in the inventive dyes in each case individually or in admixture with one another, the total amount of the couplers and the developers in the inventive dye (based on the total amount of the dye) in each case being about 0.005 to 20 percent by weight, preferably about 0.01 to 5.0 percent by weight and particularly 0.1 to 2.5 percent by weight. The total amount of the combination of developer and coupler in the dye described here preferably is about 0.01 to 20 percent by weight, an amount of about 0.02 to 6 percent by weight and especially of 0.2 to 10 percent by weight being particularly preferred. The developers and couplers generally are used in approximately equimolar amounts; in this connection, however, it is not disadvantageous if the developers or the couplers are present in a certain excess (such as a ratio of coupler to developer of 1:2 to 1:0.5).
Furthermore, the inventive dye may additionally contain other dye components, such as 6-amino-2-methylphenol and 2-amino-5-methylphenol as well as conventional direct dyes, for example, triphenylmethane dyes such as 4-[(4′-aminophenyl)-(4′-imino-2″,5″-cyclohexadiene-1″-ylidene)-methyl]-2-methylaminobenzene monohydrochloride (C.I. 42 510) and 4-[(4′-amino-3′-methyl-phenyl)-(4″-imino-3″-methyl-2″,5″-cyclohexadiene-1″-ylidene)-methyl]-2-methylaminobenzene monohydrochloride (C.I. 42 520), aromatic nitro dyes such as 4-(2′-hydroxyethyl)amino-nitrotoluene, 2-amino-4,6-dinitrophenol, 2-amino-5-(2′-hydroxyethyl)amino-nitrobenzene, 2-chloro-6-(ethylamino)-4-nitrophenol, 4-chloro-N-(2-hydroxyethyl)-2-nitroaniline, 5-chloro-2-hydroxy-4-nitroaniline, 2amino-4-chloro-6-nitrophenol and 1-[(2′-ureidoethyl)amino-4-nitrobenzene, azo dyes such as the sodium salt of 6-[(4′-aminophenyl)azo]-5-hydroxy-naphthalene-1-sulfonic acid (C.I. 14 805) and dispersion dyes such as, for example, 1,4-diaminoanthraquinone and 1,4,5,8-tetraaminoanthraquinone. The aforementioned dye components may be contained in the inventive dyes in an amount of about 0.1 to 4 percent by weight.
Of course, if the couplers and developers as well as the other dye components are bases, they may also be used in the form of their physiologically compatible salts with organic or inorganic assets, such as hydrochloric acid or sulfuric acid, or, if they have aromatic OH groups, in the form of the salts with bases, such as alkali phenolates.
Moreover, the inventive dyes, if they are to be used to dye hair, may also contain other additives, conventionally used in cosmetic materials, for example, antioxidants, such as ascorbic acid, thioglycolic acid or sodium sulfite, as well as perfume oils, complexing agents, wetting agents, emulsifiers, thickeners and care materials.
The inventive dyes may be prepared in the form of a solution, especially an aqueous or aqueous alcoholic solution. However, the especially preferred form of the preparation is a cream, a gel or an emulsion. Its composition represents a mixture of the dye components with additives, which are usually employed for such preparations.
Conventional additives for solutions, creams, emulsions or gels are, for example, solvents such as water, low molecular weight aliphatic alcohols, such as ethanol, propanol or isopropanol, glycerin or glycols, such as 1,2-propylene glycol, wetting agents or emulsifiers of the anionic, cationic, amphoteric or nonionic class of surface active substances, such as fatty alcohol sulfates, ethoxylated fatty alcohol sulfates, alkyl sulfonates, alkylbenzene sulfonates, alkyltrimethylammonium salts, alkylbetaines, ethoxylated fatty alcohols, ethoxylated nonylphenoles, fatty acid alkanolamides and ethoxylated fatty acid esters, furthermore, thickeners such as higher molecular weight fatty alcohols, starch, cellulose derivatives, petroleum jelly, paraffin oil and fatty acids, as well as care materials, such as cationic resins, lanolin derivatives, cholesterol, pantothenic acid and betaine. The components mentioned are used in amounts, which a customary for such purposes; for example, the wetting agents and emulsifiers are used in concentrations of about 0.5 to 30 percent by weight, the thickness in an amount of about 0.1 to 25 percent by weight and the care materials in a concentration of about 0.1 to 5 percent by weight.
Depending on the composition, the inventive dye may be slightly acidic, neutral or alkaline. In particular, it has a pH of 6.5 to 11.5, the adjustment to a basic pH preferably being made with ammonia. However, organic amines, such as monoethanolamine and triethanolamine, or also inorganic bases, such as sodium hydroxide and potassium hydroxide may also be used. For adjusting the pH in the acidic range, inorganic organic acids, such as phosphoric acid, acetic acid, citric acid or tartaric acid comes into consideration.
If they are to be used for the oxidative dyeing of hair, the dyes, described above, are mixed immediately before use with an oxidizing agent and an amount of dye, sufficient for the treatment, is applied on the hair. Generally, about 50 to 200 gram of this mixture is applied, depending on the fullness of the latter. The ready-for-use oxidation dye, obtained upon mixing with the oxidizing agent, preferably has a pH of 6.5 to 11.5.
The following come into consideration as oxidizing agents for developing the hair dyeing: mainly hydrogen peroxide or its addition compounds with urea, melamine, sodium borate or sodium carbonate in the form of a 3 percent to 12 percent and preferably a 6 percent aqueous solution, also oxygen from the air. If a 6 percent hydrogen peroxide solution is used as oxidizing agent, the ratio by weight of hair dyeing agent to oxidizing agent is 5:1 to 1:2 and preferably 1:1. Larger amounts of oxidizing agent are used especially for higher concentrations of dye in the hair-dyeing agent or if greater bleaching of the hair is intended at the same time. The mixture is allowed to act on the hair for about 10 to 45 minutes and preferably for 30 minutes at 15° to 50° C. The hair is then rinsed with water and dried. Optionally, after the rinsing, the hair is washed with a shampoo and possibly rinsed with a weak organic acid, such as citric acid or tartaric acid. Subsequently, the hair is dried.
The inventive dye, containing N-benzyl-p-phenylenediamine derivatives of Formula (I) as developer, makes dyeings possible with excellent color fastness, especially as far as light fastness, wash fastness and crock fastness are concerned. With regard to the color properties, the inventive dyeing agent offers a wide range of different color nuances, ranging from blond, brown, purple and violet to blue and black color shades, depending on the nature and composition of the dye components. The shades of color are distinguished here especially by their color intensity. The very good dyeing properties of the dye of the present invention are furthermore shown by the fact that this material enables even grayish hair, which has not previously been damaged chemically, to be dyed without problems and with good covering power.
The inventive N-benzyl-p-phenylenediamine derivatives of Formula (I) can be synthesized using known methods, such as the methods described in the examples.
The N-benzyl-p-phenylenediamine derivatives of Formula (I) are readily soluble in water and make dyeings possible with a high color intensity and excellent color fastness, especially as far as light fastness, wash fastness and crock fastness are concerned. They furthermore have an excellent shelf life, especially as a component of the oxidation dyes, which are described here.
A further object of the present invention are new N-benzyl-p-phenylenediamine derivatives of Formula (I), in which R4 is not a nitro group, a methyl group, a hydroxy group, an amino group, a dimethylamino group, a bromine atom or a chlorine atom, when R1=R2=R3=R5=hydrogen, or their physiologically compatible, water-soluble salts.
The following examples are intended to explain the object of the invention in greater detail, without limiting the invention to these examples.
EXAMPLES Example 1
Synthesis of N-benzyl-1,4-diaminobenzenes
t-Butyl N-(4-aminophenyl) carbamate (0.031 gram, 0.15 mmoles) and 0.10 mmoles of the appropriate aldehyde are dissolved in 1,2-dichloroethane. Subsequently, 0.1 mL of an acetic acid solution (1 molar in 1,2-dichloroethane) and 0.06 g of NaBH(OAc)3 (0.3 mmoles) are added and the reaction mixture is stirred for 5 to 15 hours at room temperature (20° to 25° C.). At the end of the reaction, the reaction mixture is poured into 10 mL of ethyl acetate and the organic phase is extracted with sodium hydrogen carbonate and then dried with magnesium sulfate. The solvent is evaporated in a rotary evaporator and the residue purified on silica gel with petroleum ether/ethyl acetate (9:1). The product, so obtained, is heated to 50° C. in 4 mL of ethanol and 1.5 mL of a 2.9 molar ethanolic hydrochloric acid solution. The precipitate is filtered off, washed twice with 1 mL of ethanol and then dried.
a. N-((3-hydroxyphenyl)methyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 3-hydroxy-benzaldehyde
    • Yield: 0.025 g (87% of the theoretical)
    • Mass spectrum: MH+215(100)
      b. N-((4-(2-hydroxyethoxy)-phenyl)methyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 4-(2-hydroxyethoxy)-benzaldehyde
    • Yield: 0.025 g (75% of the theoretical)
    • Mass spectrum: MH+259(100)
      c. N-{4-[(4-aminophenylamino)-methyl]-phenyl}-acetamide hydrochloride
    • Aldehyde used: 4-acetamino-benzaldehyde
    • Yield: 0.025 g (76% of the theoretical)
    • Mass spectrum: MH+256(100)
      d. 4-[(4-amino-phenylamino)-methyl]-2,6-dimethyl-phenol hydrochloride
    • Aldehyde used: 2,6-dimethyl-4-hydroxy-benzaldehyde
    • Yield: 0.025 g (79% of the theoretical)
    • Mass spectrum: MH+243(100)
      e. N-benzo[1,3]dioxol-5-ylmethyl-1,4-diamino-benzene hydrochloride
    • Aldehyde used: 3,4-methylenedioxy-benzaldehyde
    • Yield: 0.025 g (79% of the theoretical)
    • Mass spectrum: MH+316(100)
      f. N-((4-hydroxyphenyl)-methyl)-1,4-diaminobenzene
    • Aldehyde used: 4-hydroxy-benzaldehyde
    • Yield: 0.025 g (100% of the theoretical)
    • Mass spectrum: MH+215(100)
      g. N-((4-aminophenyl)-methyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: t-butyl N-(4-formyl-phenyl)carbamate
    • Yield: 0.025 g (77% of the theoretical)
    • Mass spectrum: MH+214(100)
      h. N-(2-amino benzyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 2-amino-benzaldehyde
    • Yield: 0.025 g (77% of the theoretical)
    • Mass spectrum: MH+214(100)
      i. N-(2-methoxy-benzyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 2-methoxy-benzaldehyde
    • Yield: 0.025 g (83% of the theoretical)
    • Mass spectrum: MH+229(100)
      j. 4-[(4-aminophenylamino)-methyl]-1,2-dihydroxybenzene hydrochloride
    • Aldehyde used: 3,4-dihydroxy-benzaldehyde
    • Yield: 0.025 g (82% of the theoretical)
    • Mass spectrum: MH+231(100)
      k. 5-[(4-aminophenylamino)-methyl]-1,3-dihydroxybenzene hydrochloride
    • Aldehyde used: 3,5-dihydroxy-benzaldehyde
    • Yield: 0.025 g (82% of the theoretical)
    • Mass spectrum: MH+231(100)
      l. 5-(4-aminophenyl)aminomethyl-1,3-diaminobenzene hydrochloride
    • Aldehyde used: 3,5-diamino-benzaldehyde
    • Yield: 0.025 g (66% of the theoretical)
    • Mass spectrum: MH+228(100)
      m. N-((4-methoxyphenyl)methyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 4-methoxy-benzaldehyde
    • Yield: 0.025 g (83% of the theoretical)
    • Mass spectrum: MH+229(100)
      n. 4-amino-2-[(4-amino-phenylamino)-methyl]-phenol hydrochloride
    • Aldehyde used: t-butyl N-(4-hydroxy-3-formyl-phenyl)-carbamate
    • Yield: 0.025 g (73% of the theoretical)
    • Mass spectrum: MH+230(100)
      o. N-(4-pyrrolidine-1-yl-benzyl)-1,4-diaminobenzene
    • Aldehyde used: 4-pyrrolidino-benzaldehyde
    • Yield: 10 g (30% of the theoretical)
      p. 2-[{4-[(4-amino-phenylamino)-methyl]-phenyl}-(2-hydroxyethyl)-amino]-ethanol hydrochloride
    • Aldehyde used: 4-(bis(2-hydroxyethyl)amino)-benzaldehyde
    • Yield: 0.025 g (60% of the theoretical)
      q. N-(4-nitro-benzyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 4-nitro-benzaldehyde
    • Yield: 0.025 g (79% of the theoretical)
    • Mass spectrum: MH+244(20)
      r. N-(4-dimethylamino-benzyl)-1,4-diaminobenzene
    • Aldehyde used: 4-dimethylamino-benzaldehyde
    • Yield: 0.025 g (100% of the theoretical)
    • Mass spectrum: MH+242(25)
      s. 2-[(4-amino-phenylamino)-methyl]1,4-dihydroxybenzene hydrochloride
    • Aldehyde used: 3,6-dihydroxy-benzaldehyde
    • Yield: 0.025 g (82% of the theoretical)
    • Mass spectrum: MH+231 (100)
      t. N-(2,4-dinitro-benzyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 2,4-dinitro-benzaldehyde
    • Yield: 0.025 g (69% of the theoretical)
    • Mass spectrum: MH+289(70)
      u. N-(2-morpholino-4-yl-benzyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 2-morpholino-benzaldehyde
    • Yield: 0.025 g (70% of the theoretical)
Example 2
Synthesis of N1-benzyl-1,4-diamino-2-methyl-benzenes and N4-benzyl-1,4-diamino-2-methyl-benzenes
A mixture of 0.033 g (0.15 mmoles) of t-butyl N-(4-amino-2-methyl-phenyl) carbamate and t-butyl N-(4-amino-3-methyl-phenyl) carbamate and 0.1 mmoles of the appropriate aldehyde is dissolved in 1,2-dichloroethane. Subsequently, 0.1 mL of an acetic acid solution (1 molar in 1,2-dichloroethane) and 0.06 g of NaBH(OAc)3 (0.3 mmoles) are added and the reaction mixture is stirred for 5 to 15 hours at room temperature (20° to 25° C.). At the end of the reaction, the reaction mixture is poured into 10 mL of ethyl acetate and the organic phase is extracted with sodium hydrogen carbonate and then dried with magnesium sulfate. The solvent is evaporated in a rotary evaporator and the residue purified on silica gel with petroleum ether/ethyl acetate (9:1). The product, so obtained, is heated to 50° C. in 4 mL of ethanol and 1.5 mL of a 2.9 molar ethanolic hydrochloric acid solution. The precipitate is filtered off, washed twice with 1 mL of ethanol and then dried.
a. N1-(4-amino-benzyl)-2-methyl-1,4-diaminobenzene hydrochloride and N1-(4-amino-benzyl)-3-methyl-1,4-diaminobenzene hydrochloride
    • Aldehyde used: t-butyl N-(4-formyl-phenyl)-carbamate
    • Yield: 0.025 g (37% of the theoretical)
    • Mass spectrum: MH+228(40)
      b. 4-amino-2-[(4-amino-2-methyl-phenylamino)-methyl]-phenol hydrochloride and 4-amino-2-[(4-amino-3-methyl-phenylamino)-methyl]-phenol hydrochloride
    • Aldehyde used: t-butyl N-(4-hydroxy-3-formyl-phenyl)-carbamate
    • Yield: 0.025 g (35% of the theoretical)
    • Mass spectrum: MH+244(100)
      c. N1-(2-methoxy-benzyl)-2-methyl-1,4-diaminobenzene hydrochloride and N1-(2-methoxy-benzyl)-3-methyl-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 2-methoxy-benzaldehyde
    • Yield: 0.025 g (39% of the theoretical)
    • Mass spectrum: MH+243(100)
      d. N1-(3-amino-benzyl)-2-methyl-1,4-diaminobenzene hydrochloride and N1-(3-amino-benzyl)-3-methyl-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 3-amino-benzaldehyde
    • Yield: 0.025 g (37% of the theoretical)
    • Mass spectrum: MH+228(100)
      e. 3-[(4-amino-2-methyl-phenylamino)-methyl]-phenol hydrochloride and 3-[(4-amino-3-methyl-phenylamino)-methyl]-phenol hydrochloride
    • Aldehyde used: 3-hydroxybenzaldehyde
    • Yield: 0.025 g (41% of the theoretical)
    • Mass spectrum: MH+229(100)
      f. N1-(4-methoxy-benzyl)-2-methyl-1,4-diaminobenzene and N1-(4-methoxy-benzyl)-3-methyl-1,4diaminobenzene hydrochloride
    • Aldehyde used: 4-methoxy-benzaldehyde
    • Yield: 0.025 g (39% of the theoretical)
    • Mass spectrum: MH+243(100)
      g. 5-(4-amino-2-methyl-phenyl)aminomethyl-1,3-diaminobenzene hydrochloride and 5-(4-amino-3-methyl-phenyl)aminomethyl-1,3-diaminobenzene hydrochloride
    • Aldehyde used: 3,5-diaminobenzaldehyde
    • Yield: 0.025 g (32% of the theoretical)
    • Mass spectrum: MH+243(100)
      h. 2-{4-[(4-amino-2-methyl-phenylamino)-methyl]-phenoxy}-ethanol hydrochloride and 2-{4-[(4-amino-3-methyl-phenylamino)-methyl]-phenoxy}-ethanol hydrochloride
    • Aldehyde used: 4-(2-hydroxyethoxy)-benzaldehyde
    • Yield: 0.025 g (36% of the theoretical)
    • Mass spectrum: MH+273(100)
      i. 2-[{4-[(4-amino-2-methyl-phenylamino)-methyl]-phenyl}-(2-hydroxyethyl)-amino]-ethanol and 2-[{4-[(4-amino-3-methyl-phenylamino)-methyl]-phenyl}-(2-hydroxyethyl)-amino]-ethanol
    • Aldehyde used: 4-(bis-(2-hydroxyethyl)-amino)-benzaldehyde
    • Yield: 10 g (16% of the theoretical)
      j. N1-(2-amino-benzyl)-2-methyl-1,4-diaminobenzene hydrochloride and N1-(2-amino-benzyl)-3-methyl-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 2-amino-benzaldehyde
    • Yield: 0.025 g (37% of the theoretical)
      k. 2-[(4-amino-2-methyl-phenylamino)-methyl]-1,4-dihydroxybenzene hydrochloride and 2-[(4-amino-3-methyl-phenylamino)-methyl]-1,4-dihydroxybenzene hydrochloride
    • Aldehyde used: 3,6-dihydroxybenzaldehyde
    • Yield: 0.025 g (39% of the theoretical)
    • Mass spectrum: MH+245(100)
      l. 2-methyl-N1-(4-nitro-benzyl)-1,4-diaminobenzene hydrochloride and 3-methyl-N1-(4-nitro-benzyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 4-nitro-benzaldehyde
    • Yield: 0.025 g (37% of the theoretical)
    • Mass spectrum: MH+258(100)
      m. 2-{4-[(4-amino-2-methyl-phenylamino)-methyl]-phenoxy}-ethanol hydrochloride and 2-{4-[(4-amino-3-methyl-phenylamino)-methyl]-phenoxy}-ethanol hydrochloride
    • Aldehyde used: 4-(2-hydroxy-ethoxy)-benzaldehyde
    • Yield: 0.025 g (36% of the theoretical)
    • Mass spectrum: MH+273(100)
      n. N-{4-[(4-amino-2-methyl-phenylamino)-methyl]-phenyl}-acetamide hydrochloride and N-{4-[(4-amino-3-methyl-phenylamino)-methyl]-phenyl}-acetamide hydrochloride
    • Aldehyde used: 4-acetamido-benzaldehyde
    • Yield: 0.025 g (36% of the theoretical)
    • Mass spectrum: MH+270(100)
      o. 4-[(4-amino-2-methyl-phenylamino)-methyl]-phenol hydrochloride and 4-[(4-amino-3-methyl-phenylamino)-methyl]-phenol hydrochloride
    • Aldehyde used: 4-hydroxy-benzaldehyde
    • Yield: 0.025 g (41% of the theoretical)
    • Mass spectrum: MH+229(100)
      p. 2-methyl-N1-(2-morpholine-4-yl-benzyl)-1,4-diaminobenzene hydrochloride and 3-methyl-N1-(2-morpholine-4-yl-benzyl)-1,4-diaminobenzene hydrochloride
    • Aldehyde used: 2-morpholino-benzaldehyde
    • Yield: 0.025 g (30% of the theoretical)
      q. N1-(4-dimethylamino-benzyl)-2-methyl-1,4-diaminobenzene and N1-(4-dimethylamino-benzyl)-3-methyl-1,4-diaminobenzene
    • Aldehyde used: 4-dimethylamino-benzaldehyde
    • Yield: 0.025 g (48% of the theoretical)
    • Mass spectrum: MH−254(100)
Example 3
Synthesis of N1-benzyl-1,4-diamino-2-(2-hydroxyethyl)-benzenes and N4-benzyl-1,4-diamino-2-(2-hydroxyethyl)benzenes
A mixture of 0.038 g (0.15 mmoles) of t-butyl N-(4-amino-2(2-hydroxyethyl)-phenyl) carbamate and N-(4-amino-3-(2-hydroxyethyl)-phenyl) carbamate and 0.1 mmoles of the appropriate aldehyde are dissolved in 1,2-dichloroethane. Subsequently, 0.1 mL of an acetic acid solution (1 molar in 1,2-dichloroethane) and 0.06 g of NaBH(OAc)3 (0.3 mmoles) are added and the reaction mixture is stirred for 5 to 15 hours at room temperature (20° to 25° C.). At the end of the reaction, the reaction mixture is poured into 10 mL of ethyl acetate and the organic phase is extracted with sodium hydrogen carbonate and then dried with magnesium sulfate. The solvent is evaporated in a rotary evaporator and the residue purified on silica gel with petroleum ether/ethyl acetate (9:1). The product, so obtained, is heated to 50° C. in 4 mL of ethanol and 1.5 mL of a 2.9 molar ethanolic hydrochloric acid solution. The precipitate is filtered off, washed twice with 1 mL of ethanol and then dried.
a. 2-[5-amino-2-(4-nitro-benzylamino)-phenyl]-ethanol hydrochloride and 2-[6-amino-3-(4-nitro-benzylamino)-phenyl]-ethanol hydrochloride
    • Aldehyde used: 4-nitro-benzaldehyde
    • Yield: 0.025 g (34% of the theoretical)
    • Mass spectrum: MH+288(100)
      b. 2-[5-amino-2-(3-amino-benzylamino)-phenyl]-ethanol hydrochloride and 2-[6-amino-3-(3-amino-benzylamino)-phenyl]-ethanol hydrochloride
    • Aldehyde used: 3-amino-benzaldehyde
    • Yield: 0.025 g (34% of the theoretical)
    • Mass spectrum: MH+258(100)
      c. 2-[5-amino-2-(4-amino-benzylamino)-phenyl]-ethanol hydrochloride and 2-[6-amino-3-(4-amino-benzylamino)-phenyl]-ethanol hydrochloride
    • Aldehyde used: t-butyl N-(4-formyl-phenyl)-carbamate
    • Yield: 0.025 g (34% of the theoretical)
    • Mass spectrum: MH+258(50)
      d. 2-[5-amino-2-(4-methoxy-benzylamino)-phenyl]-ethanol hydrochloride and 2-[6-amino-3-(4-methoxy-benzylamino)-phenyl]-ethanol hydrochloride
    • Aldehyde used: 4-methoxy-benzaldehyde
    • Yield: 0.025 g (35% of the theoretical)
    • Mass spectrum: MH+273(100)
      e. 2-[(4-{[4-amino-2-(2-hydroxyethyl)-phenylamino]-methyl}-phenyl)-(2-hydroxy ethyl)-amino]-ethanol and 2-[(4-{[4-amino-3-(2-hydroxyethyl-phenylamino]-methyl}-phenyl)-(2-hydroxyethyl)-amino]-ethanol
    • Aldehyde used: 4-bis(2-hydroxyethyl)amino-benzaldehyde
    • Yield: 15 g (25% of the theoretical)
      f. 2-[5-amino-2-(2-methoxy-benzylamino)-phenyl]-ethanol hydrochloride and 2-[6-amino-3-(2-methoxy-benzylamino)-phenyl]-ethanol hydrochloride
    • Aldehyde used: 2-methoxy-benzaldehyde
    • Yield: 0.025 g (36% of the theoretical)
    • Mass spectrum: MH+273(100)
      g. 2-[5-amino-2-(2-amino-benzylamino)-phenyl]-ethanol hydrochloride and 2-[6-amino-3-(2-amino-benzylamino)-phenyl]-ethanol hydrochloride
    • Aldehyde used: 2-amino-benzaldehyde
    • Yield: 0.025 g (34% of the theoretical)
    • Mass spectrum: MH+258(100)
      h. 2-{[4-amino-2-(2-hydroxyethyl)-phenylamino]-methyl}-1,4-dihydroxy-benzene hydrochloride and 2-{[4-amino-3-(2-hydroxyethyl)-phenylamino]-methyl}-1,4-dihydroxy-benzene hydrochloride
    • Aldehyde used: 3,6-dihydroxy-benzaldehyde
    • Yield: 0.025 g (36% of the theoretical)
    • Mass spectrum: MH+275(100)
      i. 4-amino-2-{[4-amino-2-(2-hydroxyethyl)-phenylamino]-methyl}-phenol hydrochloride and 4-amino-2-{[4-amino-3-(2-hydroxyethyl)-phenylamino]-methyl}-phenol hydrochloride
    • Aldehyde used: t-butyl N-(4-hydroxy-3-formyl-phenyl)-carbamate
    • Yield: 0.025 g (32% of the theoretical)
    • Mass spectrum: MH+274(100)
      j. 2-[5-amino-2-(2-morpholine-4-yl-benzylamino)-phenyl]-ethanol hydrochloride and 2-[6-amino-3-(2-morpholine-4-yl-benzylamino)-phenyl]-ethanol hydrochloride
    • Aldehyde used: 2-morpholino-benzaldehyde
    • Yield: 0.025 g (28% of the theoretical)
      k. 2-[5-amino-2-(4-dimethylamino-benzylamino)-phenyl]-ethanol and 2-[6-amino-3-(4-dimethylamino-benzylamino)-phenyl]-ethanol
    • Aldehyde used: 4-dimethylamino-benzaldehyde
    • Yield: 0.025 g (42% of the theoretical)
      l. 2-[2-amino-5-(3,5-diamino-benzylamino)-phenyl]-ethanol hydrochloride and 2-[5-amino-2-(3,5-diamino-benzylamino)-phenyl]-ethanol hydrochloride
    • Aldehyde used: 3,5-diamino-benzaldehyde
    • Yield: 0.025 g (29% of the theoretical)
    • Mass spectrum: MH+273(100)
Examples 4 to 53
Hair Dyes
Hair dye solutions of the following composition are prepared:
1.25 mmoles developer substance of Formula (I) of Table 1
1.25 mmoles coupler of Table 1
1.0 g potassium oleate (8% aqueous solution)
1.0 g ammonia (22% aqueous solution)
1.0 g ethanol
0.3 g ascorbic acid
ad 100.0 g water
Immediately before use, the above dye solution (50 g) is mixed with 50 g of a 6 percent aqueous hydrogen peroxide solution. Subsequently, the mixture is applied on bleached hair. After a period of action of 30 minutes at 40° C., the hair is rinsed with water, washed with a conventional, commercial shampoo and dried. The resulting dye means are summarized in Table 1.
TABLE 1
Coupler
II.
1,3-
diamino-4-
Ex- I. (2-hydroxy- III.
am- 1,3- ethoxy)- 5-amino-
ple Developer dihydroxy- benzene 2-methyl- IV.
No. Formula (I) benzene sulfate phenol 1-naphthol
4. of Example brown dark blue purple blue
1a
5. of Example dark blond dark blue purple blue
1b
6. of Example dark blond dark blue purple blue
1c
7. of Example gray blue purple blue
1d
8. of Example dark blond blue purple blue
1e
9. of Example dark blond blue purple blue
1f
10. of Example dark blond blue purple blue
1g
11. of Example medium blue purple blue
1h blond
12. of Example light blond blue purple blue-gray
1i
13. of Example blond blue purple blue-gray
1j
14. of Example dark blond blue purple blue-gray
1k
15. of Example brown blue purple- blue-gray
1l blue
16. of Example dark blond blue dark blue
1m purple
17. of Example light blond blue-gray purple purple
1n
18. of Example light blond blue purple blue
1o
19. of Example medium blue purple blue
1p blond
20. of Example dark blond blue purple violet
1q
21. of Example light blond blue purple violet
1r
22. of Example light blond blue purple violet
1s
23. of Example light blond blue purple light violet
1t
24. of Example light blond blue purple light violet
1u
25. of Example medium blue purple violet
2a blond
26. of Example blond blue purple violet
2b
27. of Example medium blue purple violet
2c blond
28. of Example medium blue purple blue
2d blond
29. of Example medium blue purple violet
2e blond
30. of Example medium blue purple violet
2f blond
31. of Example blond blue purple violet
2g
32. of Example light blond blue purple violet
2h
33. of Example light blond blue purple violet
2i
34. of Example light blond blue purple violet
2j
35. of Example light blond blue purple gray
2k
36. of Example blond blue purple gray-violet
2l
37. of Example light blond blue purple violet
2m
38. of Example dark blond blue purple violet
2n
39. of Example light blond blue purple violet
2o
40. of Example light blond blue purple violet
2p
41. of Example light blond blue purple violet
2q
42. of Example medium blue purple blue-gray
3a blond
43. of Example light blond blue purple blue
3b
44. of Example dark blond blue purple violet
3c
45. of Example light blond blue purple light blue
3d
46. of Example light blond blue purple violet
3e
47. of Example light blond blue purple violet
3f
48. of Example light blond blue purple light blue
3g
49. of Example light blond blue purple violet
3h
50. of Example light blond blue purple violet
3i
51. of Example light blond blue purple light blue
3j
52. of Example light blond blue purple violet
3k
53. of Example light blond blue purple violet
3l
Examples 54 to 123
Hair Dyes
Hair dye solutions of the following composition are prepared:
X g N-(benzyl)-1,4-diamino-benzene (developer E1 to E7 of
Formula (I) of Table 2)
U g Developer E8 to E15 of Table 2
Y g Coupler K11 to K36 of Table 4
Z g direct dye D1 to D3 of Table 3
10.0 g potassium oleate (8% aqueous solution)
10.0 g ammonia (22% aqueous solution)
10.0 g ethanol
0.3 g ascorbic acid
ad 100.0 g water
Immediately before use, the above dye solution (30 g) is mixed with a 30 g of a 6 percent aqueous hydrogen peroxide solution. Subsequently, the mixture is applied on bleached hair. After a period of action of 30 minutes at 40° C., the hair is rinsed with water, washed with a conventional, commercial shampoo and dried. The dyeing results are summarized in Table 5.
Examples 124 to 165
Hair Dyes
Creamy dye carrier compositions of the following composition are prepared:
X g N-(benzyl)-1,4-diamino-benzene (developer substance
E1 to E7 of Formula (I) of Table 2)
U g Developer E8 to E15 of Table 2
Y g Coupler K11 to K36 of Table 4
Z g direct dye D2 of Table 3
15.0 g cetyl alcohol
0.3 g ascorbic acid
3.5 g sodium lauryl alcohol diglycol ether sulfate, 28%
aqueous solution
3.0 g ammonia, 22% aqueous solution
0.3 g sodium sulfite, anlydrous
ad 100.0 g water
Immediately before use, the above dye cream (30 g) is mixed with 30 g of a 6 percent aqueous hydrogen peroxide solution. Subsequently, the mixture is applied on hair. After a period of action of 30 minutes at 40° C., the hair is reduced with water, washed with a conventional, commercial shampoo and dried. The dyeing results are summarized in Table 6.
TABLE 2
Developer
E1 N-((3-hydroxyphenyl)methyl)-1,4-diaminobenzene hydrochloride
E2 N-((4-aminophenyl)methyl)-1,4-diaminobenzene hydrochloride
E3 N-((4-(2-hydroxyethoxy)-phenyl)methyl)-1,4-diaminobenzene
hydrochloride
E4 N-((4-methoxyphenyl)methyl)-1,4-diaminobenzene hydrochloride
E5 N-{4-[(4-amino-phenylamino)-methyl]-phenyl}-acetamide
hydrochloride
E6 N-((4-hydroxyphenyl)-methyl)-1,4-diaminobenzene
E7 N-benzo[1,3]dioxol-5-ylmethyl-1,4-diaminobenzene hydrochloride
E8 1,4-diaminobenzene
E9 2,5-diamino-phenylethanol sulfate
E10 3-methyl-4-amino phenol
E11 4-amino-2-aminomethyl-phenol-dihydrochloride
E12 4-amino-phenol
E13 N,N-bis(2′-hydroxyethyl)-p-phenylenediamine sulfate
E14 4,5-diamino-1-(2′-hydroxyethyl)-pyrazole sulfate
E15 2,5-diaminotoluene sulfate
TABLE 3
Direct Dyes
D1 2,6-diamino-3-((pyridine-3-yl)azo)pyridine
D2 6-chloro-2-ethylamino-4-nitrophenol
D3 2-amino-6-chloro-4-nitrophenol
TABLE 4
Coupler
K11 1,3-diaminobenzene
K12 2-amino-4-(2′-hydroxyethyl)amino-anisole sulfate
K13 1,3-diamino-4-(2′-hydroxyethoxy)benzene sulfate
K14 2,4-diamino-5-fluoro-toluene sulfate
K15 3-amino-2-methylamino-6-methoxy-pyridine
K16 3,5-diamino-2,6-dimethoxy-pyridine-dihydrochloride
K17 2,4-diamino-5-ethoxy-toluene sulfate
K18 N-(3-dimethylamino)phenylurea
K19 1,3-bis(2,4-diaminophenoxy)propane-tetrahydrochloride
K21 3-amino-phenol
K22 5-amino-2-methyl-phenol
K23 3-amino-2-chloro-6-methyl-phenol
K24 5-amino-4-fluoro-2-methyl-phenol sulfate
K25 1-naphthol
K26 1-acetoxy-2-methyl-naphthalene
K31 1,3-dihydroxy-benzene
K32 2-methyl-1,3-dihydroxy-benzene
K33 1-chloro-2,4-dihydroxy-benzene
K34 4-(2′-hydroxyethyl)amino-1,2-methylenedioxybenzene hydro-
chloride
K35 3,4-methylenedioxy-phenol
K36 2-amino-5-methyl-phenol
TABLE 5
Hair Dyes
Example No.
54 55 56 57
Dye (amount of dye in gram)
E1 0.25 0.20 0.20 0.20
E10 0.30
E11 0.30
E12 0.30
E14 0.30
K31 0.18 0.20
K32 0.22
K33 0.20
K25 0.30 0.30 0.30
K26 0.35
Dyeing reddish reddish reddish reddish
Result brown brown brown brown
Example No.
58 59 60 61 62 63
Dye (amount of dye in grams)
E1 0.35 0.25 0.3  0.10 0.10 0.15
E8 0.15
E9 0.15
E15 0.15
K12 0.10
K13 0.09 0.09
K31 0.20 0.15 0.20 0.10
K32 0.20 0.10 0.10
K33 0.20
K21 0.05
K22 0.05
K23 0.05 0.10 0.10 0.10
Dyeing blond blond blond blond blond blond
Result
Example No.
64 65 66 67
Dye (amount of dye in grams)
E2 0.25 0.20 0.20 0.20
E10 0.30
E11 0.30
E12 0.30
E14 0.30
K31 0.18 0.20
K32 0.22
K33 0.20
K25 0.30 0.30 0.30
K26 0.35
Dyeing reddish reddish reddish reddish
Result brown brown brown brown
Example No.
68 169 70 71 72 73
Dye (amount of dye in grams)
E1 0.35 0.25 0.3  0.10 0.10 0.15
E8 0.15
E9 0.15
E15 0.15
K12 0.10
K13 0.09 0.09
K31 0.20 0.15 0.20 0.10
K32 0.20 0.10 0.10
K33 0.20
K21 0.05
K22 0.05
K23 0.05 0.10 0.10 0.10
Dyeing blond blond blond blond blond blond
Result
Example No.
74 75 76 77
Dye (amount of dye in grams)
E3 0.25 0.20 0.20 0.20
E10 0.30
E11 0.30
E12 0.30
E14 0.30
K31 0.18 0.20
K32 0.22
K33 0.20
K25 0.30 0.30 0.30
K26 0.35
Dyeing reddish reddish reddish reddish
Result brown brown brown brown
Example No.
78 79 80 81 82 83
Dye (amount of dye in grams)
E3 0.35 0.25 0.30 0.10 0.10 0.15
E8 0.15
E9 0.15
E15 0.15
K12 0.10
K13 0.09 0.09
K31 0.20 0.15 0.20 0.10
K32 0.20 0.10 0.10
K33 0.20
K21 0.05
K22 0.05
K23 0.05 0.10 0.10 0.10
Dyeing blond blond blond blond blond blond
Result
Example No.
84 85 86 87
Dye (amount of dye in grams)
E4 0.25 0.20 0.20 0.20
E10 0.30
E11 0.30
E12 0.30
E14 0.30
K31 0.18 0.20
K32 0.22
K33 0.20
K25 0.30 0.30 0.30
K26 0.35
Dyeing reddish reddish reddish reddish
Result brown brown brown brown
Example No.
88 89 90 91 92 93
Dye (amount of dye in grams)
E4 0.35 0.25 0.30 0.10 0.10 0.15
E8 0.15
E9 0.15
E15 0.15
K12 0.10
K13 0.09 0.09
K31 0.20 0.15 0.20 0.10
K32 0.20 0.10 0.10
K33 0.20
K21 0.05
K22 0.05
K23 0.05 0.10 0.10 0.10
Dyeing blond blond blond blond blond blond
Result
Example No.
94 95 96 97
Dye (amount of dye in grams)
E5 0.25 0.20 0.20 0.20
E10 0.30
E11 0.30
E12 0.30
E14 0.30
K31 0.18 0.20
K32 0.22
K33 0.20
K25 0.30 0.30 0.30
K26 0.35
Dyeing reddish reddish reddish reddish
Result brown brown brown brown
Example No.
98 99 100 101 102 103
Dye (amount of dye in grams)
E5 0.35 0.25 0.30 0.10 0.10 0.15
E8 0.15
E9 0.15
E15 0.15
K12 0.10
K13 0.09 0.09
K31 0.20 0.15 0.20 0.10
K32 0.20 0.10 0.10
K33 0.20
K21 0.05
K22 0.05
K23 0.05 0.10 0.10 0.10
Dyeing blond blond blond blond blond blond
Result
Example No.
104 105 106 107
Dye (amount of dye in grams)
E6 0.20 0.15 0.15 0.15
E10 0.30
E11 0.30
E12 0.30
E14 0.30
K31 0.18 0.20
K32 0.22
K33 0.20
K25 0.30 0.30 0.30
K26 0.35
Dyeing reddish reddish reddish reddish
Result brown brown brown brown
Example No.
108 109 110 111 112 113
Dye (amount of dye in grams)
E6 0.25 0.20 0.25 0.05 0.05 0.10
E8 0.15
E9 0.15
E15 0.15
K12 0.10
K13 0.09 0.09
K31 0.20 0.15 0.20 0.10
K32 0.20 0.10 0.10
K33 0.20
K21 0.05
K22 0.05
K23 0.05 0.10 0.10 0.10
Dyeing blond blond blond blond blond blond
Result
Example No.
114 115 116 117
Dye (amount of dye in grams)
E7 0.25 0.20 0.20 0.20
E10 0.30
E11 0.30
E12 0.30
E14 0.30
K31 0.18 0.20
K32 0.22
K33 0.20
K25 0.30 0.30 0.30
K26 0.35
Dyeing reddish reddish reddish reddish
Result brown brown brown brown
Example No.
118 119 120 121 122 123
Dye (amount of dye in grams)
E7 0.35 0.25 0.30 0.10 0.10 0.15
E8 0.15
E9 0.15
E15 0.15
K12 0.10
K13 0.09 0.09
K31 0.20 0.15 0.20 0.10
K32 0.20 0.10 0.10
K33 0.20
K21 0.05
K22 0.05
K23 0.05 0.10 0.10 0.10
Dyeing blond blond blond blond blond blond
Result
TABLE 6
Hair Dyeing Agents
Example No.
124 125 126 127 128 129
Dye (amount of dye in grams)
E1 1.80 1.80 1.80 0.70 0.70 0.70
K12 0.10 0.10 0.10
K13 1.10 1.10 1.10
K31 1.10 1.10 1.10 0.40 0.40 0.40
D2 0.10 0.10 0.10
K23 0.05 0.10 0.10 0.10
Dyeing Result black black black brown brown brown
Example No.
130 131 132 133 134 135
Dye (amount of dye in grams)
E2 2.00 2.00 2.00 0.80 0.80 0.80
K12 0.10 0.10 0.10
K13 1.10 1.10 1.10
K31 1.10 1.10 1.10 0.40 0.40 0.40
D2 0.10 0.10 0.10
K23 0.05 0.10 0.10 0.10
Dyeing Result black black black brown brown brown
Example No.
136 137 138 139 140 141
Dye (amount of dye in grams)
E3 2.00 2.00 2.00 0.80 0.80 0.80
K12 0.10 0.10 0.10
K13 1.10 1.10 1.10
K31 1.10 1.10 1.10 0.40 0.40 0.40
D2 0.10 0.10 0.10
K23 0.05 0.10 0.10 0.10
Dyeing Result black black black brown brown brown
Example No.
142 143 144 145 146 147
Dye (amount of dye in grams)
E4 1.90 1.90 1.90 0.70 0.70 0.70
K12 0.10 0.10 0.10
K13 1.10 1.10 1.10
K31 1.10 1.10 1.10 0.40 0.40 0.40
D2 0.10 0.10 0.10
K23 0.05 0.10 0.10 0.10
Dyeing Result black black black brown brown brown
Example No.
148 149 150 151 152 153
Dye (amount of dye in grams)
E5 2.0  2.0  2.0  0.8  0.80 0.80
K12 0.10 0.10 0.10
K13 1.10 1.10 1.10
K31 1.10 1.10 1.10 0.40 0.40 0.40
D2 0.10 0.10 0.10
K23 0.05 0.10 0.10 0.10
Dyeing Result black black black brown brown brown
Example No.
154 155 156 157 158 159
Dye (amount of dye in grams)
E6 3.00 3.00 3.00 1.20 1.20 1.20
K12 0.10 0.10 0.10
K13 1.10 1.10 1.10
K31 1.10 1.10 1.10 0.40 0.40 0.40
D2 0.10 0.10 0.10
K23 0.05 0.10 0.10 0.10
Dyeing Result black black black brown brown brown
Example No.
160 161 162 163 164 165
Dye (amount of dye in grams)
E7 2.00 2.00 2.00 0.80 0.80 0.80
K12 0.10 0.10 0.10
K13 1.10 1.10 1.10
K31 1.10 1.10 1.10 0.40 0.40 0.40
D2 0.10 0.10 0.10
K23 0.05 0.10 0.10 0.10
Dyeing Result black black black brown brown brown
Unless stated otherwise, all percentages in the present application are percentages by weight.

Claims (11)

1. N-benzyl-p-phenylenediamine derivatives of the general Formula (I) or their physiologically compatible, water-soluble salts
Figure USRE041549-20100824-C00003
in which
R1 R1 is hydrogen, a (C1-C4) alkyl group or a hydroxy-(C1-C4) alkyl group,
R2 is hydrogen, a halogen atom (F, Cl, Br, I), a cyano group, a (C1-C4) alkoxy group, a hydroxy (C1-C4) alkoxy group, a (C1-C6) alkyl group, a (C1-C4) alkyl thioether group, a mercapto group, a nitro group, an amino group, a (C1-C4) alkylamino group, a di-(C1-C4) alkylamino group, a di-(hydroxy-(C1-C4)-alkyl) amino group, a (hydroxy-(C1-C4)-alkyl) amino group, a trifluoromethane group, a —C(O)CH3 group, a —C(O)CF3 group, an —Si(CH3)3 group, a hydroxy-(C1-C4) alkyl group, a dihydroxy-(C3-C4) alkyl group or a morpholino group,
R3, R4 independently of one another are hydrogen, a halogen atom, a hydroxy group, a (C1-C4) alkoxy group, a hydroxy-(C1-C4) alkoxy group, a (C1-C6) alkyl group, a (C1-C4) alkyl thioether group, a mercapto group, an amino group, a (C1-C6) alkylamino group, a di-(C1-C6) alkylamino group, a di-(hydroxy-(C1-C4)-alkyl)amino group, a hydroxy-(C1-C4) alkylamino group, a trifluoromethane group, an acetamido group, a —C(O)CH3 group, a —C(O)CF3 group, an —Si(CH3)3 group, a hydroxy-(C1-C4) alkyl group or a dihydroxy-(C3-C4) alkyl group or R3 and R4 together form an —O—CH2—O— bridge and
R5 is hydrogen, a hydroxy group or a (C1-C6) alkyl group,
with the proviso that
(i) at least one of the R2 to R5 groups is different from a hydrogen; and
(ii) R1 is not hydrogen or a (C1-C4) alkyl group when R2=R4=R5=hydrogen and R3=chlorine; and
((iii)(iii) R4 is not a nitro group, a methyl group, a hydroxy group, an amino group, a dimethylamino group, a bromine atom or a chlorine atom when R1=R2=R3=R5=hydrogen; and
(iv) when R1 and R2 are both hydrogen and R3 and R5 are both alkyl, R4 is not OH.
2. Compounds of Formula (I) are preferred The N-benzyl-p-phenylenediamine derivatives of the general Formula (I) or their water-soluble salts recited in claim 1 , in which
(i) R1 and one of the groups R2 to R5 is hydrogen; and/or
(ii) three of the R1 to R5 groups are hydrogen and the two remaining groups, independently of one another, represent hydrogen, a methoxy group, a hydroxy group or an amino group or, in the case of R3 and R4, jointly form an —O—CH2—O bridge, in which case R2 is not a hydroxy group and at least one of the R2 to R5 groups is not hydrogen; and/or
(iii) four of the R1 to R5 groups are hydrogen and the fifth group is a methoxy group, a hydroxyethoxy group, a hydroxy group or an amino group, R2 not being a hydroxy group and at least one of the R2 to R5 groups being different from hydrogen.
3. An agent for dyeing keratin fibers based on a combination of developer and coupler, wherein, as developer, at least one N-benzyl-p-phenylenediamine derivative of Formula (I) or its physiologically compatible, water soluble salt is contained
Figure USRE041549-20100824-C00004
in which
R1 R1 is hydrogen, a (C1-C4) alkyl group or a hydroxy-(C1-C4) alkyl group, P
R2 is hydrogen, a halogen atom (F, Cl, Br, I), a cyano group, a (C1-C4) alkoxy group, a hydroxy (C1-C4) alkoxy group, a (C1-C6) alkyl group, a (C1-C4) alkyl thioether group, a mercapto group, a nitro group, an amino group, a (C1-C4) alkylamino group, a di-(C1-C4) alkylamino group, a di-(hydroxy-(C1-C4)-alkyl) amino group, a (hydroxy-(C1-C4)-alkyl) amino group, a trifluoromethane group, a —C(O)CH3 group, a —C(O)CF3 group, an —Si(CH3)3 group, a hydroxy-(C1-C4) alkyl group, a dihydroxy-(C3-C4) alkyl group or a morpholino group,
R3, R4 independently of one another are hydrogen, a halogen atom, a hydroxy group, a (C1-C4) alkoxy group, a hydroxy-(C1-C4) alkoxy group, a (C1-C6) alkyl group, a (C1-C4) alkyl thioether group, a mercapto group, an amino group, a (C1-C6) alkylamino group, a di-(C1-C6) alkylamino group, a di-(hydroxy-(C1-C4)-alkyl) amino group, a hydroxy-(C1-C4) alkylamino group, a trifluoromethane group, an acetamido group, a —C(O)CH3 group, a —C(O)CF3 group, an —Si(CH3)3 group, a hydroxy-(C1-C4) alkyl group or a dihydroxy-(C3-C4) alkyl group or R3 and R4 together form an —O—CH2—O— bridge and
R5 is hydrogen, a hydroxy group or a (C1-C6) alkyl group,
with the proviso that
(i) at least one of the R2 to R5 groups is different from a hydrogen and
(ii) R1 is not hydrogen or a (C1-C4) alkyl group when R2=R4=R5=hydrogen and R3=chlorine.
4. The agent of claim 3, wherein
(i) R1 and one of the groups R2 to R5 is hydrogen and/or
(ii) three of the R1 to R5 groups are hydrogen and the two remaining groups, independently of one another, represent hydrogen, or methoxy group, a hydroxy group or an amino group or, in the case of R3 and R4, jointly form an —O—CH2—O bridge, in which case R2 is not a hydroxy group and at least one of the R2 to R5 groups is not hydrogen; and/or
(iii) four of the R1 to R5 groups are hydrogen and the fifth group is a methoxy group, a hydroxyethoxy group, a hydroxy group or an amino group, R2 not being a hydroxy group and at least one of the R2 to R5 groups being different from hydrogen, with the proviso that at least one of the R2 to R5 groups is different from hydrogen.
5. The agent of claim 3, wherein the compound of Formula (I) is selected from the group comprising: N-((3-hydroxyphenyl)methyl)-1,4-diaminobenzene; N-((4-aminophenyl)methyl)-1,4-diaminobenzene; N-((4-hydroxyphenyl)-methyl)-1,4-diaminobenzene; N-((2-methoxyphenyl)-methyl)-1,4-diaminobenzene; N-((4-hydroxy-3,5-dimethyl-phenyl)methyl)-1,4-diaminobenzene; N-((4-(2-hydroxyethoxy)-phenyl)methyl)-1,4-diaminobenzene; N-benzo-[1,3]-dioxol-5-ylmethyl-1,4-diaminobenzene; N-{4-[(4-aminophenylamino)-methyl]-phenyl}-acetamide and N-((4-methoxyphenyl)-methyl)-1,4-diaminobenzene, as well as their physiologically compatible salts.
6. The agent of claim 3, wherein the N-benzyl-p-phenylenediamine derivative of Formula (I) is contained in an amount of 0.005 to 20 percent by weight.
7. The agent of claim 3, wherein the agent has a pH of 6.5 to 11.5.
8. The agent of claim 3, wherein the coupler is selected from the group comprising 2,6-diaminopyridine, 2-amino-4-[(2-hydroxy-ethyl)amino]-anisole, 2,4-diamino-1-fluoro-5-methylbenzene, 2,4-diamino-1-methoxy-5-methyl-benzene, 2,4-diamino-1-ethoxy-5-methylbenzene, 2,4-diamino-1-(2-hydroxyethoxy)-5-methylbenzene, 2,4-di[(2-hydroxyethyl)amino]-1,5-dimethoxy-benzene, 2,3-diamino-6-methoxy-pyridine, 3-amino-6-methoxy-2-(methylamino)-pyridine, 2,6-diamino-3,5-dimethoxy-pyridine, 3,5-diamino-2,6-dimethoxy-pyridine, 1,3-diamino-benzene, 2,4-diamino-1-(2-hydroxyethoxy)-benzene, 2,4-diamino-1,5-di(2-hydroxy-ethoxy)-benzene, 1-(2-aminoethoxy)-2,4-diaminobenzene, 2-amino-1-(2-hydroxy-ethoxy)-4-methylaminobenzene, 2,4-diaminophenoxyacetic acid, 3-[di(2-hydroxy-ethyl)amino]-aniline, 4-amino-2-di[(2-hydroxyethyl)amino]-1-ethoxybenzene, 5-methyl-2-(1-methylethyl)-phenol, 3-[(2-hydroxyethyl)amino]-aniline, 3-[(2-amino-ethyl)-amino]-aniline, 1,3-di(2,4-diaminophenoxy)-propane, di(2,4-diaminophenoxy)-methane, 1,3-diamino-2,4-dimethoxybenzene, 2,6-bis(2-hydroxyethyl)amino-toluene, 4-hydroxyindole, 3-dimethylaminophenol, 3-diethylaminophenol, 5-amino-2-methylphenol, 5-amino-4-fluoro-2-methylphenol, 5-amino-4-methoxy-2-methylphenol, 5-amino-4-ethoxy-2-methylphenol, 3-amino-2,4-dichlorophenol, 5-amino-2,4-dichlorophenol, 3-amino-2-methylphenol, 3-amino-2-chloro-6-methylphenol, 3-aminophenol, 2-[(3-hydroxyphenyl)amino]-acetamide, 5-[(2-hydroxyethyl)amino]-2-methylphenol, 3-[(2-hydroxyethyl)amino]-phenol, 3-[(2-methoxyethyl)-amino]-phenol, 5-amino-2-ethylphenol, 2-(4-amino-2-hydroxyphenoxy)-ethanol, 5-[(3-hydroxypropyl)amino]-2-methylphenol, 3-[(2,3-dihydroxypropyl)amino]-2-methylphenol, 3-[(2-hydroxyethyl)amino]-2-methylphenol, 2-amino-3-hydroxy-pyridine, 5-amino-4-chloro-2-methylphenol, 1-naphthol, 1,5-dihydroxy-naphthalene, 1,7-dihydroxy-naphthalene, 2,3-dihydroxy-naphthalene, 2,7-dihydroxy-naphthalene, 2-methyl-1-naphthol acetate, 1,3-dihydroxybenzene, 1-chloro-2,4-dihydroxybenzene, 2-chloro-1,3-dihydroxybenzene, 1,2-dichloro-3,5-dihydroxy-4-methylbenzene, 1,5-dichloro-2,4-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene, 3,4-methylenedioxy-phenol, 3,4-methylenedioxy-aniline, 5-[(2-hydroxyethyl)amino]-1,3-benzodioxol, 6-bromo-1-hydroxy-3,4-methylenedioxy-benzene, 3,4-diamino-benzoic acid, 3,4-dihydro-6-hydroxy-1,4(2H)-benzoxazine, 6-amino-3,4-dihydro-1,4(2H)-benzoxazine, 3-methyl-1-phenyl-5-pyrazolone, 5,6-dihydroxy-indole, 5,6-dihydroxy-indoline, 5-hydroxy-indole, 6-hydroxy-indole, 7-hydroxy-indole and 2,3-indolinedione.
9. The agent of claim 3, wherein each of the developer and the coupler is contained in a total amount of from 0.005 to 20 wt. % based on a total amount of colorant present.
10. The agent of claim 3, further comprising at least one direct dye.
11. The agent of claim 3, consisting of a hair colorant.
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