Patent Application
20070017040
The present invention relates to colorants for oxidative dyeing of keratin fibers, particularly human hair, containing 2-amino-5-aminomethyl-phenol derivatives as dye component and to novel 2-amino-5-aminomethyl-phenol derivatives.
Oxidation dyes have become very important for the coloring of keratin fibers, particularly in the field of hair coloring. In this case, the color is created by reaction of certain developers with certain couplers in the presence of an appropriate oxidant. Suitable developers for this purpose are, in particular, 2,5-diaminotoluene, 2,5-diaminophenylethyl alcohol, p-aminophenol and 1,4-diaminobenzene. Suitable couplers are, for example, resorcinol, 4-chlororesorcinol, 1-naphthol, 3-aminophenol and derivatives of m-phenylenediamine.
Oxidation dyes used for coloring human hair must meet numerous requirements besides producing colorations of a desired intensity. The dyes must be toxicologically and dermatologically harmless, and the resulting hair colors must have good light, permanent wave, acid, and rubbing resistance. The hair colors must also remain stable for a period of at least four to six weeks in the absence of light, rubbing, and chemicals. In addition, it must be possible, by means of a combination of appropriate developers and couplers, to create a wide range of different color shades.
The adjustment of lighter color shades presents a special problem in terms of uniform dye uptake from the hair roots to the hair tips and in terms of resistance of the colorations to permanent wave treatment. The use of direct yellow-dyeing aromatic nitro dyes together with oxidative hair dye precursors represents a partial solution of the said problem, but the stability of the colorations over a period of several weeks is often unsatisfactory.
To solve the said problem, DE 28 33 989 A1 proposes the use of 2-amino-5-methylphenol as a yellow dyeing oxidative dye in oxidative hair colorants. Although this compound is well suited as shade-adjustment agent for the creation of bright blond shades and gold shades, it does not fully meet requirements. The use of special 2-Amino-5-aminomethyl-phenols in oxidative colorants is also described in WO 02/058654 A1.
We have now found that new 2-amino-5-aminomethyl-phenol derivatives of the general formula (I) provide bright blond to gold color shades, and that the requirements placed on such agents, particularly as regards wash fastness, light fastness, and rubbing fastness, are met to an unusually high degree.
The object of the present invention are 2-amino-5-aminomethyl-phenol derivatives of general formula (I) or a physiologically tolerated, water-soluble salt thereof,
wherein
R1 denotes a substituted or unsubstituted five-membered or a six-membered heterocyclic ring, and wherein R1 is not an unsubstituted 3-pyridinyl ring.
Suitable 2-amino-5-aminomethyl-phenol derivatives of general of formula (I) are, for example:
Preferred are compounds of formula (I) wherein R1 is a substituted or unsubstituted 2-pyridinyl group, a substituted or unsubstituted 2-pyrimidinyl group, a substituted or unsubstituted 2-pyrazinyl group, a substituted or unsubstituted 2-thiazolyl group or a substituted 3-pyridinyl group.
Particularly preferred compounds of formula (I) are 2-amino-5-[(2-pyridinylamino)methyl]phenol, 2-amino-5-{[(4-methyl-2-pyridinyl)amino]methyl}phenol, 2-amino-5-[(2-pyrimidinylamino)methyl]phenol, 2-amino-5-[(2-pyrazinylamino)methyl]phenol and 2-amino-5-[(1,3-thiazol-2-ylamino)-methyl]phenol, 2-amino-5-{[(4-methyl-1,3-thiazol-2-yl)amino]methyl}-phenol, 2-amino-5-{[(5-methyl-1,3-thiazol-2-yl)amino]methyl}phenol, 2-amino-5-{[(4,5-dimethyl-1,3-thiazol-2-yl)amino]methyl}phenol, or a physiologically tolerated salt thereof.
The compounds of formula (I) can be used as free bases or in the form of their physiologically tolerated salts with inorganic or organic acids such as, for example, hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, propionic acid, lactic acid, or citric acid.
The 2-amino-5-aminomethyl-phenol derivatives of formula (I) can be prepared by known synthetic methods, for example by reductive amination of 3-hydroxy-4-nitro-benzaldehyde with a heterocyclic primary amine followed by reduction of the nitro group, or by condensation of 3-hydroxy-4-nitro-benzoic acid with a heterocyclic primary amine, followed by the reduction of the nitro and amide group.
Another object of the present invention are agents for oxidative coloring of keratin fibers, for example wool, furs, feathers, or hair, particularly human hair, containing at least one 2-amino-5-aminomethyl-phenol derivative of formula (I).
The colorants of the invention contain the 2-amino-5-aminomethyl-phenol derivative of formula (I) in an amount from about 0.005 to 20% by weight, an amount from about 0.01 to 5.0% by weight, and particularly from 0.1 to 2.5% by weight being especially preferred.
Hair coloring compositions of this invention can contain the 2-amino-5-aminomethyl-phenol derivative of formula (I) as a sole colorant, or in combination with known couplers and developers, in order to enlarge the color shade palette.
Thus 2-amino-5-aminomethyl-phenol derivatives of formula (I) provide as a sole colorant intense yellow to yellow-orange color shades. To achieve additional color shades, which are unusually resistant to washing, common oxidative dyes, for example developers or couplers alone or in admixture with one another, can be added.
By use of 2-amino-5-aminomethyl-phenol derivatives of formula (I) in a 1:1 combination with most common coupler or developer components, intense yellow, gold yellow and blond color shades are obtained. The combination with pyrazole derivatives give intense violet color shades.
Suitable couplers include for example, N-((3-dimethylamino)phenyl)urea, 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-methoxypyridine, 3-amino-6-methoxy-2-(methylamino)pyridine, 2,6-diamino-3,5-dimethoxypyridine, 3,5-diamino-2,6-dimethoxypyridine, 1,3-diaminobenzene, 2,4-diamino-1-(2-hydroxyethoxy)benzene, 1,3-diamino-4-(2,3-dihydroxypropoxy)-benzene, 1,3-diamino-4-(3-hydroxypropoxy)benzene, 1,3-diamino-4-(2-methoxyethoxy)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)aminotoluene, 4-hydroxyindole, 3-dimethylaminophenol, 3-(diethylamino)phenol, 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-amino-phenol, 2-[(3-hydroxyphenyl)-amino]acetamide, 5-[(2-hydroxyethyl)amino]-4-methoxy-2-methylphenol, 5-[(2-hydroxyethyl)amino]-2-methylphenol, 3-[(2-hydroxyethyl)amino]-phenol, 3-[(2-methoxyethyl)amino]phenol, 5-amino-2-ethylphenol, 5-amino-2-methoxyphenol, 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-hydroxypyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 5-amino-4-chloro-2-methylphenol, 1-naphthol, 2-methyl-1-naphthol, 1,5-dihydroxynaphthalene, 1,7-dihydroxynaphthalene, 2,3-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 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-methylenedioxyphenol, 3,4-methylenedioxyaniline, 5-[(2-hydroxyethyl)amino]-1,3-benzodioxole, 6-bromo-1-hydroxy-3,4-methylenedioxybenzene, 3,4-diaminobenzoic acid, 6-hydroxybenzomorpholine, 6-aminobenzomorpholine, 3-methyl-1-phenyl-5-pyrazolone, 5,6-dihydroxyindole, 5,6-dihydroxyindoline, 5-hydroxyindole, 6-hydroxyindole, 7-hydroxyindole and 2,3-indolinedione.
Suitable developers include, for example, 1,4-diaminobenzene (p-phenylenediamine), 1,4-diamino-2-methylbenzene (p-toluylenediamine), 1,4-diamino-2,6-dimethylbenzene, 1,4-diamino-3,5-diethylbenzene, 1,4-diamino-2,5-dimethylbenzene, 1,4-diamino-2,3-dimethylbenzene, 2-chloro-1,4-diaminobenzene, 1,4-diamino-2-(thiophen-2-yl)benzene, 1,4-diamino-2-(thiophen-3-yl)benzene, 2-(6-2,5-methyl-pyridin-2-yl)-benzene-1,4-diamine, 2-thiazol-2-yl-benzene-1,4-diamino, 1,4-diamino-2-(pyridin-3-yl)benzene, 2,5-diaminobiphenyl, 2,5-diamino-4′-(1-methylethyl)-1,1′-biphenyl, 2,3′,5-triamino-1,1′-biphenyl, 2′-chloro-1,1′-biphenyl-2,5-diamine, 3′-fluoro-1,1′-biphenyl-2,5-diamine, 1,4-diamino-2-methoxymethylbenzene, 1,4-diamino-2-aminomethylbenzene, 3-(3-amino-phenylamino-propenyl)-benzene-1,4-diamine, 2-propenylbenzene-1,4-diamine, 1,4-diamino-2-((phenylamino)methyl)-benzene, 1,4-diamino-2-((ethyl-(2-hydroxyethyl)-amino)methyl)benzene, 1,4-diamino-2-hydroxymethylbenzene, 1,4-diamino-2-(2-hydroxyethoxy)-benzene, 2-(2-(acetylamino)ethoxy)-1,4-diaminobenzene, 4-(phenyl-amino)aniline, 4-(dimethylamino)aniline, 4-(diethylamino)aniline, 4-(dipropylamino)aniline, 4-[ethyl(2-hydroxyethyl)amino]aniline, 4-[di(2-hydroxyethyl)amino]aniline, 4-[di(2-hydroxyethyl)amino]-2-methyl-aniline, 4-[(2-methoxyethyl)amino]aniline, 4-[(3-hydroxypropyl)amino]-aniline, 4-[(2,3-dihydroxypropyl)amino]aniline, 4-(((4-aminophenyl)-methyl)amino)aniline, 4-[(4-amino-phenylamino)-methyl]-phenol, 3-((4-amino-phenylamino)methyl)phenol, 1,4-diamino-N-(4-pyrrolidin-1-yl-benzyl)-benzene, 1,4-diamino-N-furan-3-ylmethylbenzene, 1,4-diamino-N-thiophen-2-ylmethylbenzene, 1,4-diamino-N-furan-2-ylmethylbenzene, 1,4-diamino-N-thiophen-3-ylmethylbenzene, 1,4-diamino-N-benzylbenzene, 1,4-diamino-2-(1-hydroxyethyl)-benzene, 1,4-diamino-2-(2-hydroxyethyl)benzene, 1,4-diamino-2-(1-methylethyl)-benzene, 1,3-bis[(4-aminophenyl)(2-hydroxyethyl)amino]-2-propanol, 1,4-bis[(4-Aminophenyl)amino]-butane, 1,8-bis(2,5-diaminophenoxy)-3,6-dioxaoctane, 2,5-diamino-4′-hydroxy-1,1′-biphenyl, 2,5-diamino-2′-trifluoromethyl-1,1′-biphenyl, 2,4′,5-triamino-1,1′-biphenyl, 4-amino-phenol, 4-amino-3-methylphenol, 4-amino-3-(hydroxymethyl)-phenol, 4-amino-3-fluoro-phenol, 4-methylamino-phenol, 4-amino-2-(aminomethyl)-phenol, 4-amino-2-(hydroxymethyl)phenol, 4-amino-2-fluorophenol, 4-amino-2-[(2-hydroxyethyl)-amino]methyl-phenol, 4-amino-2-methyl-phenol, 4-amino-2-(methoxymethyl)phenol, 4-amino-2-(2-hydroxyethyl)phenol, bis(5-amino-2-hydroxyphenyl)-phenol, 5-amino-salicylic acid, 2,5-diamino-pyridine, 2,4,5,6-tetramino-pyrimidine, 2,5,6-triamino-4-(1H)-pyrimidone, 4,5-diamino-1-(2-hydroxyethyl)-1H-pyrazole, 4,5-diamino-1-(1-methylethyl)-1H-pyrazole, 4,5-diamino-1-[(4-methylphenyl)methyl]-1H-pyrazole, 1-[(4-chlorophenyl)methyl]-4,5-diamino-1H-pyrazole, 4,5-diamino-1-methyl-1H-pyrazole, 4,5-diamino-1-pentyl-1H-pyrazole, 4,5-diamino-1-(phenylmethyl)-1H-pyrazole, 4,5-diamino-1-((4-methoxyphenyl)methyl-1H-pyrazole, 2-aminophenol, 2-amino-6-methylphenol, 2-amino-5-methyl-phenol, 4-amino-1,1′-biphenyl-3-ol, 2-amino-5-ethylphenol, 1,2,4-trihydroxybenzene, 2,4-diaminophenol, 1,4-dihydroxybenzene and 2-(((4-aminophenyl)amino)methyl)-1,4-diaminobenzene.
The aforesaid couplers and developers can be used in the colorant of the invention either alone or in admixture with each other.
The total amount of the developer-coupler combination contained in the colorants described here is preferably from about 0.01 to 20% by weight, an amount from about 0.02 to 10% by weight, and particularly from 0.2 to 6.0% by weight being particularly preferred. In general, the developers and couplers are used in about equimolar amounts. It is not disadvantageous, however, to use the developer in a certain excess or deficiency, for example in a coupler-developer-ratio of from 1:2 to 1:0.5.
Moreover, the colorant of the invention may also contain other components, for example 6-amino-2-methylphenol, 2-amino-5-methylphenol and 2-amino-5-ethylphenol, as well as common direct dyes, for example triphenylmethane dyes such as [(4′-aminophenyl)-(4′-imino-2″,5″-cyclohexadien-1″-ylidene)methyl-2-methylaminobenze monohydrochloride (C.I. 42510) and 4-[(4′-amino-3′-methylphenyl)(4″-imino-3″-methyl-2″,5″-cyclohexadient-1″-yl)idine)methyl]-2-methylaminobenzene monohydrochloride (C.I. 42520), aromatic nitro dyes, such as 4-(2′-hydroxyethyl)aminonitrotoluene, 2-amino-4,6-dinitrophenol, 2-amino-5-(2′-hydroxyethyl)aminonitrobenzene, 2-chloro-6-(ethylamino)-4-nitrophenol, 4-chloro-N-(2-hydroxyethyl)-2-nitroaniline, 5-chloro-2-hydroxy-4-nitroaniline, 2-amino-4-chloro-6-nitrophenol and 1-[(2′-ureidoethyl)-amino-4-nitrobenzene, furthermore azo dyes such as sodium 6-[(4′-aminophenyl])azo]-5-hydroxynaphthalenesulfonate, and disperse dyes such as, for example 1,4-diaminoanthraquinone and 1,4,5,8-tetramino-anthraquinone.
The colorants may contain these components in an amount from about 0.1 to 4.0% by weight.
Naturally, the couplers and developers as well as the other dye components, if they are bases, can also be used in the form of their physiologically tolerated salts with organic or inorganic acids such as, for example, hydrochloric acid or sulfuric acid, or—if they contain aromatic hydroxy groups—in the form of salts with bases, for example as their alkali metal phenoxides.
Moreover, the colorants, if they are intended for coloring hair, can contain other common cosmetic additives, for example antioxidants such as ascorbic acid, thioglycolic acid, or sodium sulfite, as well as perfumes, complexing agents, wetting agents, emulsifiers, thickeners, and hair-care agents. The form in which the colorant preparations of the invention appear can be, for example, that of a solution, particularly an aqueous or aqueous-alcoholic solution. Particularly preferred preparation forms, however, are creams, gels, or emulsions. Their composition consists of a mixture of dye components and the usual additives for such preparations.
Conventional additives to solutions, creams, emulsions, or gels are: for example, solvents such as water, the lower aliphatic alcohols, for example ethanol, propanol or isopropanol, glycerol or glycols such as 1,2-propylene glycol; moreover wetting agents or emulsifiers from the class of anionic, cationic, amphoteric, or nonionic surfactants, such as fatty alcohol sulfates, ethoxylated fatty alcohol sulfates, alkylsulfonates, alkylbenzenesulfonates, alkyltrimethylammonium salts, alkylbetaines, ethoxylated fatty alcohols, ethoxylated nonylphenols, fatty alkanolamides, ethoxylated fatty esters; furthermore thickeners, such as the fatty alcohols, starch, or cellulose derivatives; furthermore vaseline, paraffin oil, and fatty acids as well as hair-care agents such as cationic resins, lanolin derivatives, cholesterol, pantothenic acid, and betaine. The said constituents are employed in amounts normally used for such purposes, for example the wetting agents and emulsifiers in an amount from about 0.5 to 30% by weight, the thickeners in an amount from about 0.1 to 25% by weight, and the hair-care agents at a concentration of about 0.1 to 5% by weight.
Depending on the composition, the colorant of the invention can be weakly acidic, neutral, or alkaline. In particular, it has a pH from 6.8 to 11.5.
According to the present invention for pH adjustment in the alkaline range the composition may further optionally comprise at least one source of alkalizing agent, preferably a source of ammonium ions and or ammonia. Any agent known in the art may be used such as alkanolamides, for example, monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-methyl-1-propanol, and 2-amino-2-hydroxymethyl-1,3-propanediol and guanidium salts. Particularly, preferred alkalizing agents are those which provide a source of ammonium ions. Any source of ammonium ions is suitable for use herein. Preferred sources include ammonium chloride, ammonium sulphate, ammonium nitrate, ammonium phosphate, ammonium acetate, ammonium carbonate, ammonium hydrogen carbonate, ammonium carbamate, ammonium hydroxide, percarbonate salts, ammonia, and mixtures thereof. Particularly preferred are ammonium carbonate, ammonium carbamate, ammonium hydrogen carbonate, ammonia, and mixtures thereof or a mixture of ammonia and organic amines (particularly monoethanolamine or triethanolamine). The compositions of the present invention may comprise from about 0.1% to about 10% by weight, preferably from about 0.5% to about 5%, most preferably from about 1% to about 3% of an alkalizing agent, preferably ammonium ions.
For pH adjustment in the acidic range, an inorganic or organic acid, for example phosphoric acid, acetic acid, citric acid, or tartaric acid, may be used.
The compositions according to the present invention may comprise at least one source of an oxidizing agent for developing the hair color. Preferred oxidizing agents for use herein are water-soluble peroxygen oxidizing agents. “Water-soluble” as defined herein means that in standard condition at least 0.1 g, preferably 1 g, more preferably 10 g of said oxidizing agent can be dissolved in 1 liter of deionized water. The oxidizing agents are valuable for the initial solubilization and decolorization of the melanin (bleaching) and accelerate the oxidation of the oxidative dye precursors (oxidative dyeing) in the hair shaft.
Any oxidizing agent known in the art may be utilized in the present invention. Preferred water-soluble oxidizing agents are inorganic peroxygen materials capable of yielding hydrogen peroxide in an aqueous solution. Water-soluble peroxygen oxidizing agents are well known in the art and include hydrogen peroxide, inorganic alkali metal peroxides such as sodium periodate and sodium peroxide, and organic peroxides such as urea peroxide, melamine peroxide, and inorganic perhydrate salt bleaching compounds, such as the alkali metal salts of perborates, percarbonates, perphosphates, persilicates, persulphates, and the like. These inorganic perhydrate salts may be incorporated as monohydrates, tetrahydrates etc. Alkyl and aryl peroxides, and or peroxidases may also be used. Mixtures of two or more such oxidizing agents can also be used if desired. The oxidizing agents may be provided in aqueous solution or as a powder which is dissolved prior to use. Preferred for use in the compositions according to the present invention are hydrogen peroxide, percarbonate, persulphates, and combinations thereof.
According to the present invention the compositions comprise from about 0.1% to about 15% by weight, preferably from about 1% to about 10% by weight, and most preferably from about 2% to about 7% by weight of an oxidizing agent.
Another preferred oxidizing agent for use herein is a source of peroxymonocarbonate ions. Preferably such a source is formed in situ from a source of hydrogen peroxide and a hydrogen carbonate ion source. Such an oxidizing agent has been found to be particularly effective at a pH of up to and including 9.5, preferably 7.5 to 9.5, more preferably about pH 9. Moreover, this system is also particularly effective in combination with a source of ammonia or ammonium ions. It has been found that this oxidizing agent can deliver improvements to the desired hair color results particularly with regard to the delivery of high lift, while considerably reducing the odor, skin and scalp irritation and damage to the hair fibers.
Accordingly, any source of these ions may be utilized. Suitable sources for use herein include sodium, potassium, guanidine, arginine, lithium, calcium, magnesium, barium, ammonium salts of carbonate, carbamate and hydrocarbonate ions, and mixtures thereof such as sodium carbonate, sodium hydrogen carbonate, potassium carbonate, potassium hydrogen carbonate, guanidine carbonate, guanidine hydrogen carbonate, lithium carbonate, calcium carbonate, magnesium carbonate, barium carbonate, ammonium carbonate, ammonium hydrogen carbonate, and mixtures thereof. Percarbonate salts may also be utilized to provide both the source of carbonate ions and oxidizing agent. Preferred sources of carbonate ions, carbamate and hydrocarbonate ions are sodium hydrogen carbonate, potassium hydrogen carbonate, ammonium carbamate, and mixtures thereof.
According to the present invention the compositions comprise from about 0.1% to about 15% by weight, preferably from about 1% to about 10% by weight, and most preferably from about 1% to about 8% by weight of a hydrogencarbonate ion and from about 0.1% to about 10% by weight, preferably from about 1% to about 7% by weight, and most preferably from about 2% to about 5% by weight of a source of hydrogen peroxide.
Especially preferred oxidants for developing the hair color are mainly hydrogen peroxide or a compound of addition of hydrogen peroxide to urea, melamine, sodium borate, or sodium carbonate, in the form of a 3 to 12%, preferably 6%, aqueous solution, as well as air oxygen. When a 6% hydrogen peroxide solution is used as the oxidant, the weight ratio of hair colorant to oxidant is 5:1 to 2:1, and preferably 1:1. Larger amounts of oxidant are used primarily when the hair colorant contains a higher dye concentration or when stronger hair bleaching is desired at the same time.
According to the present invention the compositions may further comprise a source of radical scavenger. As used herein the term radical scavenger refers to a species that can react with a reactive radical, preferably carbonate radicals, to convert the reactive radical by a series of fast reactions to a less reactive species. Suitable radical scavengers for use herein include compounds according to the general formula (Ia):
R1—Y—C(H)(R3)—R4—(C(H)(R5)—Y—R6)n (Ia)
wherein Y is NR2, O, or S, preferably NR2, n is 0 to 2, and wherein R4 is monovalent or divalent and is selected from: (a) substituted or unsubstituted, straight or branched, alkyl, mono- or poly-unsaturated alkyl, heteroalkyl, aliphatic, heteroaliphatic, or heteroolefinic systems, (b) substituted or unsubstituted, mono- or poly-cyclic aliphatic, aryl, or heterocyclic systems, or (c) substituted or unsubstituted, mono-, poly-, or per-fluoro alkyl systems; the systems of (a), (b) and (c) comprising from 1 to 12 carbon atoms and 0 to 5 heteroatoms selected from O, S, N, P, and Si; and wherein R4 can be connected to R3 or R5 to create a 5, 6 or 7 membered ring; and wherein R1, R2, R3, R5, and R6 are monovalent and are selected independently from: (a), (b) and (c) described herein above, or H.
Preferably, R4 is selected from: (a) substituted or unsubstituted, straight or branched, alkyl, heteroalkyl, aliphatic, heteroaliphatic, or heteroolefinic systems, (b) substituted or unsubstituted, mono- or poly-cyclic aliphatic, aryl, or heterocyclic systems, or (c) substituted or unsubstituted, mono-, poly-, or per-fluoro alkyl systems; more preferably R4 is selected from (a) substituted or unsubstituted, straight or branched, alkyl, heteroalkyl, aliphatic, or heteroaliphatic systems, (b) substituted or unsubstituted, aryl, or heterocyclic systems, or (c) substituted or unsubstituted, mono-, poly-, or per-fluoro alkyl systems; more preferably substituted or unsubstituted, straight or branched, alkyl, or heteroalkyl systems.
Preferably, the R4 systems of (a), (b), and (c), described herein above, comprise from 1 to 8 carbon atoms, preferably from 1 to 6, more preferably from 1 to 4 carbon atoms, and from 0 to 3 heteroatoms; preferably from 0 to 2 heteroatoms; most preferably from 0 to 1 heteroatoms. Where the systems contain heteroatoms, preferably they contain 1 heteroatom. Preferred heteroatoms include O, S, and N; more preferred are O, and N; and most preferred is O.
Preferably, R1, R2, R3, R5, and R6 are selected independently from any of the systems defined for R4 above, and H.
In alternative embodiments, any of R1, R2, R3, R4, R5, and R6 groups are substituted. Preferably, the substituent(s) is selected from: (a) the group of C-linked monovalent substituents consisting of: (i) substituted or unsubstituted, straight or branched, alkyl, mono- or polyunsaturated alkyl, heteroalkyl, aliphatic, heteroaliphatic, or heteroolefinic systems, (ii) substituted or unsubstituted, mono- or polycyclic aliphatic, aryl, or heterocyclic systems, or (iii) substituted or unsubstituted, mono-, poly-, or perfluoro alkyl systems; said systems of (i), (ii) and (iii) comprising from 1 to 10 carbon atoms and 0 to 5 heteroatoms selected from O, S, N, P, and Si; (b) the group of S-linked monovalent substituents consisting of SA1, SCN, SO2A1, SO3A1, SSA1, SOA1, SO2NA1A2, SNA1A2, and SONA1A2; (c) the group of O-linked monovalent substituents consisting of OA1, OCN and ONA1A2; (d) the group of N-linked monovalent substituents consisting of NA1A2, (NA1A2A3)+, NC, NA1OA2, NA1SA2, NCO, NCS, NO2, N═NA1, N═NOA1, NA1CN, NA1NA2A3; (e) the group of monovalent substituents consisting of COOA1, CON3, CONA12, CONA1COA2, C(═NA1)NA1A2, CHO, CHS, CN, NC, and X; and (f) the group consisting fluoroalkyl monovalent substituents consisting of mono-, poly-, or per-fluoro alkyl systems comprising from 1 to 12 carbon atoms and 0 to 4 heteroatoms.
For the groups (b) to (e), described above, A1, A2, and A3 are monovalent and are independently selected from: (1) H, (2) substituted or unsubstituted, straight or branched, alkyl, mono- or poly-unsaturated alkyl, heteroalkyl, aliphatic, heteroaliphatic, or heteroolefinic systems,
(3) substituted or unsubstituted, mono- or poly-cyclic aliphatic, aryl, or heterocyclic systems, or (4) substituted or unsubstituted, mono-, poly-, or per-fluoro alkyl systems; said systems of (2), (3) and (4) comprising from
1 to 10 carbon atoms and 0 to 5 heteroatoms selected from O, S, N, P, and Si; and wherein X is a halogen selected from the group consisting of F, Cl, Br, and I.
Preferred substituents for use herein include those having a Hammett Sigma Para (σp) Value from −0.65 to +0.75, preferably from −0.4 to +0.5. Hammett Sigma Values are described in Advanced Organic Chemistry—Reactions, Mechanisms and Structure (Jerry March, 5th ed. (2001) at pages 368-375).
Alternative suitable radical scavengers for use herein are compounds according to the general formula (II):
wherein R1, R2, R3, R4, and R5 are each independently selected from H, COO−M+, Cl, Br, SO3−M+, NO2, OCH3, OH or a C1 to C10 primary or secondary alkyl and M is either H or alkali metal. Preferably, the above-described radical scavengers have a pKa of more than 8.5 to ensure protonation of the hydroxy goup.
Other suitable radical scavengers for use herein include those selected from group (III) benzylamine, imidazole, di-tert-butylhydroxytoluene, hydroquinone, guanine, pyrazine, piperidine, morpholine, methylmorpholine, 2methyoxyethylamine, and mixtures thereof.
Preferred radical scavengers according to the present invention are selected from the classes of alkanolamines, amino sugars, amino acids, esters of amino acids and mixtures thereof. Particularly preferred compounds are: monoethanolamine, 3-amino-1-propanol, 4-amino-1-butanol, 5-amino-1-pentanol, 1-amino-2-propanol, 1-amino-2-butanol,
1-amino-2-pentanol, 1-amino-3-pentanol, 1-amino-4-pentanol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropane-1,2-diol, glucosamine, N-acetylglucosamine, glycine, arginine, lysine, proline, glutamine, histidine, sarcosine, serine, glutamic acid, tryptophan, and mixtures thereof, and the salts such as the potassium, sodium and ammonium salts thereof and mixtures thereof. Especially preferred compounds are glycine, sarcosine, lysine, serine, 2 methoxyethylamine, glucosamine, glutamic acid, morpholine, piperdine, ethylamine, 3 amino-1-propanol, and mixtures thereof.
The radical scavengers according to the present invention preferably have a molecular weight of less than about 500, preferably less than about 300, more preferably less than about 250 in order to facilitate penetration of the radical scavenger into the hair fibre. The compositions of the present invention preferably comprise from about 0.1% to about 10% by weight, preferably from about 1% to about 7% by weight of radical scavenger. The radical scavenger is also preferably selected such that it is not an identical species as the alkalizing agent. According to one embodiment of the present invention the radical scavenger may be formed in situ in the hair dyeing compositions prior to application to the hair fibres.
To use the afore-described colorants for oxidative dyeing of hair, said colorants are mixed with an oxidant immediately before use, and the mixture is applied to hair in an amount sufficient for hair treatment which, depending on hair fullness, is generally from about 60 to 200 grams.
Suitable oxidants for developing the hair color are mainly hydrogen peroxide or a compound of addition of hydrogen peroxide to urea, melamine, sodium borate, or sodium carbonate, in the form of a 3 to 12% by weight, preferably 6% by weight, aqueous solution, as well as air oxygen. When a 6% hydrogen peroxide solution is used as the oxidant, the weight ratio of hair colorant to oxidant is 5:1 to 2:1, and preferably 1:1. Larger amounts of oxidant are used primarily when the hair colorant contains a higher dye concentration or when stronger hair bleaching is desired at the same time.
The mixture is allowed to act on the hair at 15 to 50° C. for about 10 to 45 minutes and preferably for 30 minutes. The hair is then rinsed with water and dried. Optionally, this rinse can be followed with a shampoo wash, optionally followed by rinsing with a weak organic acid, for example citric or tartaric acid. The hair is then dried.
The colorant of the invention containing a 2-amino-5-aminomethyl-phenol derivatives of formula (I) affords colorations of excellent color fastness, particularly in terms of wash fastness, light fastness, and rubbing fastness. As regards the coloring properties, the colorants of the invention, provide without further coupler or developer intense yellow to yellow-orange color shades. Depending on the type and composition of the dye components, the colorants of the invention can provide a wide range of different color shades ranging from blond, gold yellow, brown, purple, violet to blue and black shades.
20.0 g (0.12 mole) of 3-hydroxy-4-nitro-benzaldehyde and 14.7 g (0.156 mole) of 2-aminopyridine were dissolved in 450 ml of 1,2-dichloroethane and the resulting mixture was heated to reflux for 6 hours using a water separator. The reaction mixture was then allowed to cool to room temperature. In small portions 10 g (0.156 mol) of acetic acid and 40.7 g (0.192 mol) of sodium triacetoxyborohydride were added to that mixture. The reaction mixture was stirred at room temperature overnight. It was then poured into 450 ml 10% NaHCO3. The organic layer was separated, and the aqueous phase was extracted with ethylacetate. The combined extracts were washed with water, evaporated, and the residue was purified over silicagel with ethylacetate to yield a brown compound, which was recristallized in ethylacetate/heptane to yield 19.3 g (65% of theory) of a brown powder.
Mp: 115-117° C.
API-ES MS: 268 [M++Na].
At room temperature a solution of 19 g (0.077 mol) of 2-nitro-5-[(2-pyridinylamino)methyl]-phenol in 200 ml of tetrahydrofurane was added dropwise to 9.7 g (0.19 mol) of hydrazine hydrate and 1.9 g 10% Pd/C in 200 ml ethanol. The reaction mixture was stirred at room temperature overnight, filtered through a plug of celite and the residue was washed with ethanol. The filtrate was evaporated and the residue was co-evaporated twice with ethanol (to remove the excess of hydrazine). The residue was suspended in 120 ml of ethanol/ethyl acetate (5:1) and 200 ml of ethylether were added. The precipitate was filtered off and dried, to yield 11 g (66% of theory) of 2-amino-5-[(2-pyridinylamino)methyl]phenol as a beige powder.
Mp: 136-138° C.
1H-NMR (300 MHz, DMSO): δ=8.89 (br s, 1H, OH); 7.94 (d, J=4.5, 1H, H(6)-pyridinyl); 7.32 (t, J=7.8, 1H, H(4)-pyridinyl); 6.74 (t, J=5.7, 1H, NH—CH2); 6.64 (s, 1H, H(6); 6.48 (s, 2H, H(3) and H(4); 6.44 (d, J=7.8, 1H, H(3)-pyridinyl); 6.42 (d, J=4.5, 1H, H(5)-pyridinyl); 4.37 (br s, 2H, NH2); 4.22 (d, J=5.7, 2H, CH2-NH).
API-ES MS: 238 [M++Na] (100); 216 [M++1] (42).
CHN-Analysis: (C12H13N3O):
(General Method of Synthesis)
1 g (6 mmole) of 3-hydroxy-4-nitro-benzaldehyde and 6 mmole of the corresponding amine were dissolved in 20 mL of 1,2-dichloroethane in a screw cap tube under argon. To that mixture were added 7 ml (0.007 mol) of 1 M acetic acid in 1,2-dichloroethane and the resulting mixture was heated to reflux for 3 hours. It was then allowed to cool to room temperature. To that mixture were added 2 g (0.0096 mol) of sodium triacetoxyborohydride and the reaction mixture was stirred at room temperature overnight. It was then poured into 40 ml saturated NaHCO3. The organic layer was separated, and the aqueous phase was extracted with ethylacetate. The combined extracts were washed with water, evaporated, and the residue was purified by column chromatography over silica gel. The product was obtained in a yield of 35% to 60% of theory.
To a solution of 0.3 g of 2-nitro-5-aminomethyl-phenol derivative (as described under 2.1) in 20 ml of a mixture of ethanol/tetrahydrofurane (4:1 to 1:1, depending on the solubility of the nitro derivative) 0.15 ml (3 mmol) of hydrazine hydrate and 0.03 g of 10% Pd/C were added. The reaction mixture was stirred at room temperature for a few hours, until the reduction was finished (according to TLC). It was then filtered through a plug of celite and the residue was washed with ethanol. The filtrate was evaporated, and the residue was co-evaporated twice with ethanol. The oily residue was triturated with ethylether and the precipitate was filtered off and dried.
Amine used: 2-amino-4-methylpyridine
Yield: 0.14 g (50% of the theory)
API-ES MS: 230 (M++1)
1H-NMR (300 MHz, DMSO): δ=8.90 (br s, 1H, OH); 7.80 (d, J=5.1, 1H, H(6)-pyridinyl); 6.63 (s, 1H, H(6); 6.61 (t, J=6.0, 1H, NH—CH2); 6.50 (s, 2H, H(3) and H(4); 6.30 (d, J=5.1, 1H, H(5)-pyridinyl); 6.26 (s, 1H, H(3)-pyridinyl); 4.35 (br s, 2H, NH2); 4.22 (d, J=6.0, 2H, CH2-NH); 2.11 (s, 3H, CH3).
Amine used: 2-aminopyrimidine
Yield: 0.25 g (95% of theory)
API-ES MS: 247 (M++1)
1H-NMR (300 MHz DMSO): δ=8.88 (br s, 1H, OH); 8.24 (d, J=4.8, 2H, H(6) and H(4)-pyrimidinyl); 7.42 (t, J=6.3, 1H, NH—CH2); 6.62 (s, 1H, H(6); 6.53 (t, J=4.8, 1H, H(5)-pyrimidinyl); 6.49 (s, 2H, H(3) and H(4); 4.35 (br s, 2H, NH2); 4.28 (d, J=6.3, 2H, CH2-NH).
Amine used: 2-aminopyrazine
Yield: 0.22 g (85% of theory)
API-ES MS: 239 (M++Na)
1H-NMR (300 MHz, DMSO): δ=8.96 (br s, 1H, OH); 7.91 (d, J=2.4, 2H, H(6) and H(5)-pyrazinyl); 7.62 (d, J=2.4, 1H, H(3)-pyrazinyl); 7.33 (t, J=5.1, 1H, NH—CH2); 6.63 (s, 1H, H(6); 6.52 (s, 2H, H(3) and H(4); 4.40 (br s, 2H, NH2); 4.24 (d, J=5.7, 2H, CH2-NH).
Amine used: 3-amino-2-chloropyridine
Yield: 1.0 g (60% of the theoretical)
API-ES MS: 302 (M++Na)
1H-NMR (300 MHz, DMSO): δ=8.94 (br s, 1H, OH); 7.54 (d, J=4.5, 1H, H(6)-pyridinyl); 7.08 (dd, J=4.1, J=8.1, 1H, H(5)-pyridinyl); 6.85 (d, J=8.1, 1H, H(4)-pyridinyl); 6.62 (s, 1H, H(6)); 6.54 (d, J=9.1, 1H, H(3) or H(4)); 6.52 (d, J=9.1, 1H, H(3) or H(4)); 6.16 (t, J=5.7, 1H, NH—CH2); 4.39 (br s, 2H, NH2); 4.19 (d, J=5.7, 2H, CH2-NH).
Amine used: 2-amino-thiazole
Yield: 0.24 g (89% of the theoretical)
API-ES MS: 244 (M++Na)
1H-NMR (300 MHz DMSO): δ=8.92 (br s, 1H, OH); 7.82 (t, J=5.4, 1H, NH—CH2); 6.99 (d, J=3.3, 1H, H(4)-thiazolyl); 6.65 (s, 1H, H(6); 6.56 (d, J=3.3, 1H, H(5)-thiazolyl); 6.52 (s, 2H, H(3) and H(4); 4.42 (br s, 2H, NH2); 4.19 (d, J=5.4, 2H, CH2-NH).
Amine used: 2-amino-5-methyl-thiazole
Yield: 0.15 g (53% of the theoretical)
API-ES MS: 258 (M++Na)
1H-NMR (300 MHz, DMSO): δ=8.95 (br s, 1H, OH); 7.69 (t, J=5.4, 1H, NH—CH2); 6.64 (s, 1H, H(6)); 6.51 (s, 2H, H(3) and H(4); 6.10 (s, 1H, H(5)-thiazolyl); 4.41 (br s, 2H, NH2); 4.16 (d, J=5.4, 2H, CH2-NH); 2.08 (s, 3H, CH3).
Amine used: 2-amino-4-methyl-thiazole
Yield: 0.24 g (91% of the theoretical)
API-ES MS: 258 (M++Na)
1H-NMR (300 MHz, DMSO): δ=8.95 (br s, 1H, OH); 7.57 (t, J=5.4, 1H, NH—CH2); 6.63 (s, 2H, H(4)-thiazolyl and H(6)); 6.50 (s, 2H, H(3) and H(4); 4.41 (br s, 2H, NH2); 4.13 (d, J=5.4, 2H, CH2-NH); 2.18 (s, 3H, CH3).
Amine used: 2-amino-4,5-dimethyl-thiazole
Yield: 0.22 g (81% of the theoretical)
API-ES MS: 272 (M++Na)
1H-NMR (300 MHz DMSO): δ=8.95 (br s, 1H, OH); 7.44 (t, J=5.4, 1H, NH—CH2); 6.63 (s, 1H, H(6)); 6.50 (s, 2H, H(3) and H(4); 4.40 (br s, 2H, NH2); 4.11 (d, J=5.4, 2H, CH2-NH); 2.09 (s, 3H, CH3); 1.98 (s, 3H, CH3).
Immediately before use, 30 g of the above mentioned colorant solution was mixed with 30 g of 6% hydrogen peroxide solution. The mixture was then applied to bleached hair. After an exposure time of 30 min at 40° C., the hair was rinsed with water, washed with a commercial shampoo, and dried. The resulting color shades are shown in Table 1.
Immediately before use, 30 g of the above mentioned colorant solution was mixed with 30 g of 6% hydrogen peroxide solution. The mixture was then applied to bleached hair. After an exposure time of 30 min at 40° C., the hair was rinsed with water, washed with a commercial shampoo, and dried. The resulting color shades are shown in Table 3.
Immediately before use, 30 g of the above mentioned colorant solution were mixed with 30 g of a 6% hydrogen peroxide solution. The mixture was then applied to bleached hair. After an exposure time of 30 min at 40° C., the hair was rinsed with water, washed with a commercial shampoo, and dried. The resulting color shades are shown in Table 4.
Immediately before use, 30 g of the above mentioned colorant solution was mixed with 30 g of a 6% hydrogen peroxide solution. The mixture was then applied to bleached hair. After an exposure time of 30 min at 40° C., the hair was rinsed with water, washed with a commercial shampoo, and dried. The resulting color shades are shown in table 9.
Unless otherwise indicated, all percentages are by weight.
All documents cited in the Detailed Description of the Invention are, in relevant part, incorporated herein by reference; the citation of any document is not to be construed as an admission that it is prior art with respect to the present invention. To the extent that any meaning or definition of a term in this written document conflicts with any meaning or definition of the term in a document incorporated by reference, the meaning or definition assigned to the term in this written document shall govern.
While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 05015398.0 | Jul 2005 | EP | regional |
