Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
  • C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
  • C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
  • C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D231/38—Nitrogen atoms

Definitions

• the invention relates to new 4- (pyrazol-4-ylimino) -2,5-cyclohexadienylidene ammonium salts and agents containing these compounds for dyeing keratin fibers.
• Two dyeing processes are generally used for the color-changing treatment of fibers containing keratin, for example human hair, wool or furs.
• the coloring is produced with so-called oxidative or permanent coloring agents, using a mixture of different developer substances and coupler substances and an oxidizing agent.
• so-called direct (non-oxidative) dyes can be added to round off the coloring result or to create special color effects.
• the second method uses only direct dyes that are applied to the fibers in a suitable carrier. This procedure is easy to use, extremely mild and is characterized by little damage to the keratin fiber. A large number of requirements are imposed on the direct dyes used here.
• the present invention therefore relates to 4- (pyrazol-4-ylimino) 2,5-cyclohexadienylidene ammonium salts of the general formula (I)
• R1 -C a C ⁇ -C6 alkyl group, a CrC hydroxyalkyl group, a C2-C4 dihydroxyalkyl group or a C 2 6 alkoxy (-C 2) alkyl group, a phenyl group, a benzyl group or a substituted benzyl group;
• R3 and R4 independently of one another are hydrogen, a CrC ⁇ -alkyl group, a -C-C 4 -hydroxyalkyl group, a C 2 -C 4 -dihydroxyalkyl group or a CrC 4 -alkoxy- (C ⁇ -C 4 ) alkyl group, or R3 and R4 together form one form four-membered to eight-membered aliphatic ring;
• R2 and R6 independently represent hydrogen, a CrC alkyl group, a CrC 4 hydroxyalkyl group, a phenyl group, a substituted phenyl group, a halogen atom or a substituted aminomethyl group;
• R5 is a cyano group, an -NR10C (O) R11 group or a sulfonamide group
• R7 and R8 independently of one another are a C 1 -C 6 -alkyl group, an unsaturated C 3 -C 6 -alkyl group, a C 2 -C 4 -hydroxyalkyl group, a C 3 -C 4 -dihydroxyalkyl group, a C 2 -C 4 -aminoalkyl group, a C 2 -C 4 dimethylaminoalkyl group, a C 2 -C 4 acetylaminoalkyl group represent a C 2 -C methoxyalkyl group, a C 2 -C ethoxyalkyl group, a dC 4 cyanoalkyl group, a CrC 4 carboxyalkyl group or a CrC 4 aminocarbonylalkyl group , or R7 and R8 together with the nitrogen atom form a ring of the formula
• R9 is hydrogen or one or more hydroxyl groups
• R10 is hydrogen or a CrC 6 alkyl group
• R11 is hydrogen, a Ci-C ⁇ -alkyl group, an amino group, an alkylamino group, a dialkylamino group, a phenyl group or a substituted phenyl group; and X " is an anion such as chloride, hydrogenosulfate, sulfate, acetate or hexafluorophosphate.
• the following cationic compounds can be mentioned, which can be combined with the previously mentioned anions X- to the electronically neutral compounds of the formula (I): (4- (5-Amino-1- (4-methylphenyl) methyl-1H -pyrazol-4-ylimino) -3-acetamido-cyclohexa-2,5-dienylidene) -diethylammonium, (4- (5-amino-1 - (4-methylphenyl) methyl-1H-pyrazol-4-ylimino) -3-acetamido-cyclohexa-2,5-dienylidene) -diisopropylammonium, (4- (5-amino-1- (4-methylphenyl) -methyl-1H-pyrazol-4-ylimino) -3-acetamido-cyclohexa-2 , 5-dienylidene) -dimethylammonium, 1- (4- (5-amino-1- (4-methylphenyl
• 2,5-dienylidene) pyrrolidinium (4- (3-methyl-5-amino-1- (2-hydroxyethyl) -1 H-pyrazol-4-ylimino) -3-methylsulfonamido-cyclohexa-2,5-dienylidene ) - diethylammonium, 1 - (4- (3-methyl-5-amino-1 - (2-hydroxyethyl) -1 H-pyrazole-
• Preferred compounds of the formula (I) are those in which (i) one or more of the radicals R2, R3, R4 and R6 are hydrogen, (ii) R1 is a Ci-C ö alkyl group, a CrC 4 hydroxyalkyl group, one Is benzyl group or methylbenzyl group and R2, R3, R4 and R6 simultaneously mean hydrogen and / or (iii) R5 is an amino group, an -NHC (0) R11 group or a sulfonamide group and R6 is hydrogen and / or (iv ) R7 and R8 are the same as a C 3 -C 3 -alkyl group (in particular a methyl group) or together with the nitrogen atom form a pyrrolidine ring.
• the 4- (pyrazol-4-ylimino) cyclohexa- 2,5-dienylidene ammonium salts of the formula (I) according to the invention can be prepared using known synthetic processes.
• the compounds of the invention can be synthesized, for example, by an oxidative coupling of a substituted pyrazole of the formula (II) with an aryl compound of the formula (III) (II) (III)
• R1, R2, R3, R4, R5, R6, R7 and R8 have the meaning given above.
• the 4- (pyrazol-4-ylimino) cyclohexa-2,5-dienylidene ammonium salts of the formula (I) according to the invention are readily soluble in water and enable dyeings (including blue dyeings) with high color intensity and excellent color fastness, in particular as regards the light fastness, Wash fastness and rub fastness.
• the compounds of forms (I) also have excellent storage stability, in particular as a constituent of the colorants described below.
• the present invention therefore furthermore relates to compositions for dyeing keratin fibers, such as, for example, hair, furs, feathers or wool, in particular human hair, which are characterized in that they contain at least one 4- (pyrazol-4-ylimino) cyclohexa- 2,5-dienylidene ammonium salt of the formula (I) included.
• the compounds of the formula (I) are used in the composition according to the invention in a total amount of about 0.005 to 20 percent by weight, in particular 0.1 to 10 percent by weight.
• the compounds of formula (I) dye keratinous material without the addition of further dyes in intense blue shades.
• the colorant according to the invention can additionally comprise further natural or synthetic non-oxidative dyes to expand the color range.
• Vegetable dyes such as henna or indigo can be mentioned as natural dyes, while azo dyes, triphenylmethane dyes, quinone dyes and in particular nitro dyes such as 1, 4-bis [(2-hydroxyethyl) amino] -2-nitrobenzene can be mentioned as synthetic non-oxidative dyes , 1 - (2-Hydroxyethyl) amino-2-nitro-4- [di (2-hydroxyethyl) amino] benzene (HC Blue No. 2), 1-amino-3-methyl-4 - [(2-hydroxyethyl ) amino] -6-nitrobenzene (HC Violet No.
• the natural and synthetic substantive dyes mentioned can be contained in a total amount of 0.001 to 4 percent by weight.
• oxidation dye precursors developer substances, coupler substances
• paraphenylenediamines, metaphenylenediamines, aminophenols or 4,5-diaminopyrazoles can also be added to the colorant according to the invention.
• additional developer substances and coupler substances can each be present in the colorant in a total amount of about 0.01 to 20 percent by weight, preferably about 0.1 to 10 percent by weight and in particular 0.1 to 5 percent by weight.
• the compounds of formula (I) can in principle also be used for dyeing other natural fibers, such as cotton, jute, sisal, linen or silk, modified natural fibers such as, for example, regenerated cellulose, nitrocellulose, alkyl cellulose or hydroxyalkyl cellulose or Acetyl cellulose and synthetic fibers such as polyamide fibers, polyurethane fibers or polyester fibers are used.
• natural fibers such as cotton, jute, sisal, linen or silk
• modified natural fibers such as, for example, regenerated cellulose, nitrocellulose, alkyl cellulose or hydroxyalkyl cellulose or Acetyl cellulose
• synthetic fibers such as polyamide fibers, polyurethane fibers or polyester fibers are used.
• the compounds of formula (I) can also serve to lighten and dye hair at the same time.
• the substantive dyes of the formula (I) are used together with an oxidizing agent.
• the main oxidizing agents that can be used are hydrogen peroxide or its addition compounds with urea, melamine, sodium borate or sodium carbonate in the form of a 1 to 12 percent, preferably a 3 to ⁇ percent, aqueous solution.
• the weight ratio between the colorant and oxidizing agent is preferably about 5: 1 to 1: 3, in particular 1: 1 to 1: 2. Larger amounts of oxidizing agent are used if at the same time a stronger bleaching of the keratin fiber (especially the hair) is intended.
• the preparation form of the hair dye according to the invention can be, for example, a solution, in particular an aqueous or aqueous-alcoholic solution.
• the particularly preferred preparation forms are a cream, a gel, a surfactant-containing foaming solution (shampoo, aerosol), an emulsion or other water-containing carriers which are suitable for use on the hair.
• Their composition represents a mixture of the dye component with the additives customary for such preparations.
• Usual additives in solutions, creams, emulsions or gels are, for example, solvents such as water, lower aliphatic monohydric or polyhydric alcohols, their esters and ethers, for example alkanols, in particular with 1 to 4 carbon atoms, for example ethanol, propanol or isopropanol, butanol, isobutanol, dihydric and trihydric alcohols, in particular those having 2 to 6 carbon atoms, for example ethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6 -Hexanediol, 1, 2,6-hexanetriol, glycerin, diethylene glycol, dipropylene glycol, polyalkylene glycols, such as triethylene glycol, polyethylene glycol, tripropylene glycol, polypropylene glycol, lower alkyl ethers of polyhydric
• wetting agents or emulsifiers from the classes of the anionic, cationic, amphoteric, nonionic or zwitterionic surface-active substances such as fatty alcohol sulfates, alkane sulfonates, alkylbenzenesulfonates, alkyltrimethylammonium salts, alkylbetaines, ⁇ -olefin sulfonyl acids, fatty acid ethyl alcohols, oxyethyl fatty alcohol amines, oxyethylated fatty alcohol amines, Fatty alcohol polyglycol ether sulfates, alkyl polyglucosides, thickeners such as higher fatty alcohols, starch, Cellulose derivatives, petroleum jelly, paraffin oil, fatty acids and other fat components in emulsified form, water-soluble polymeric thickeners such as natural gums, guar gum, xanthan gum, locust bean gum, pectin, dextran,
• ingredients mentioned are used in the amounts customary for such purposes, for example the wetting agents and emulsifiers in concentrations of about 0.5 to 30 percent by weight, the thickeners in an amount of about 0.1 to 25 percent by weight and the care substances in an amount of about 0.1 to 5 weight percent.
• the colorants according to the invention can react weakly acidic, neutral or alkaline, the adjustment of acidic pH values preferably using citric acid, lactic acid, tartaric acid or phosphoric acid, while the adjustment of alkaline pH values is preferably carried out using ammonia.
• organic amines such as monoethanolamine, diethanolamine, triethanolamine, N-methyl-N-ethanolamine, N-methyl-N, N-diethanolamine, 2- (2-hydroxyethoxy) ethanolamine, di-2 can also be used instead of ammonia - (2-hydroxyethoxy) ethanamine and tri-2- (2-hydroxy- ethoxy) -ethanamine or inorganic bases such as hydroxides, for example lithium hydroxide, sodium hydroxide and potassium hydroxide, or carbonates, for example lithium carbonate, sodium carbonate or potassium carbonate, can be used.
• hydroxides for example lithium hydroxide, sodium hydroxide and potassium hydroxide
• carbonates for example lithium carbonate, sodium carbonate or potassium carbonate
• the dyeing solution is allowed to act on the hair at 20 to 50 ° C. for about 10 to 45 minutes, preferably at 40 ° C. for 40 minutes, the hair is then rinsed out with water and dried. If necessary, this rinse is washed with a shampoo and / or rinsed with a weak organic acid. The hair is then dried.
• the hair dye according to the invention leads to hair dyeings with excellent fastness properties, in particular as regards light fastness, wash fastness and rub fastness.
• the high color intensity and the color purity of the dyeings that can be achieved are remarkable.
• the hair dye according to the invention it is also possible to dye gray and chemically undamaged hair without problems and with very good coverage.
• the dyeings obtained are uniform and very reproducible, regardless of the different structure of the hair.
• 0.01 mol of the corresponding pyrazole and 0.01 mol of the corresponding substituted meta-phenylenediamine are stirred in 30 ml of ethanol.
• the pH of the suspension is adjusted to 9 with a 30% aqueous ammonia solution.
• 12 ml of a 6% aqueous hydrogen peroxide solution are added.
• the reaction mixture is stirred for 5 hours at room temperature.
• the reaction mixture is then filtered.
• the filtrate is mixed with the saturated L solution of a compound containing a negative counterion. The precipitate is filtered off, washed and then dried.
• Phenylenediamine used N- (3- (dimethylamino) phenyl) urea
• Phenylenediamine used N- (3- (1-pyrrolidinyl) phenyl) urea
• Phenylenediamine used N- (3- (3- (4-morpholinyl) phenyl) urea Used compound with negative counterion: ammonium hexafluorophosphate Yield: 1.35 g (27% of theory) 1 H NMR (DMSO-d6): 1.35 (d, 6H); 3.73 (m, 8H); 4.55 (m. 1H); 6.75 (s, 2H); 6.92 (d, 1H); 7.71 (d. 1H); 8.00 (s, 1H); 8.16 (s, 1H), 8.58 (b, 2H); 8.95 (s, 1H)
• Phenylenediamine used N- (3- (3- (3-hydroxypirrolidinyl) phenyl) urea
• Phenylenediamine used N- (3- (3- (di (2-hydroxyethyl) amino) phenyl) urea
• the above ready-to-use hair dye is obtained immediately before use by mixing the dye with the remaining components.
• the pH is adjusted either with lactic acid or with dilute ammonia solution.
• Bleached hair is then treated for 40 minutes at a temperature of 40 ° C. with the hair dye (once acidified with lactic acid or once with alkaline ammonia solution).
• the hair is then rinsed with water and dried.
• the hair has an intense color.
• Table 1 The color results are summarized in Table 1.
• the pH of the coloring solution is adjusted to 8 with dilute ammonia solution.
• the above ready-to-use hair dye is obtained immediately before use by mixing the dye with the remaining components. Bleached hair is then treated with the hair dye at a temperature of 40 ° C for 40 minutes. The hair is then rinsed with water and dried. The color results are summarized in Table 2.
• the pH of the coloring solution is adjusted to 8 with dilute ammonia solution.
• the above ready-to-use hair dye is obtained immediately before use by mixing the dye with the remaining components.
• the pH is adjusted either with lactic acid or with dilute ammonia solution. Bleached hair is then treated with the hair dye at a temperature of 40 ° C for 40 minutes. The hair is then rinsed with water and dried.
• the color results are summarized in Table 4.
• the pH is adjusted to 10 with 25% ammonia.

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• 2004
  • 2004-05-11 DE DE102004023122A patent/DE102004023122A1/de not_active Withdrawn
• 2005
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