Abstract: The present invention has for an object compounds of formula (I) and colorants containing these 4-aminobiphenyl-3-ol derivatives of general formula (I) for dyeing keratin fibers, particularly hair, wherein R1 and R2 independently of each other denote hydrogen, a halogen atom, a cyano group, a hydroxyl group, a C1–C4-alkoxy group, a C2–C4-hydroxyalkoxy group, a C1–C6-alkyl group, a nitro group, a trifluoromethyl group, a —C(O)H group, a —C(O)CH3 group, a —C(O)CF3 group, an —Si(CH3)3 group or a C1–6-hydroxyalkyl group or R1 and R2 together form an —O—CH2—O— bridge.

Abstract: 4,5-Diaminopyrazoles of general formula (I) wherein R denotes a straight-chain or branched C1-C6-alkyl group, an unsubstituted phenyl group or a singly or multiply substituted phenyl group wherein the substituents are selected independently of each other from among a halogen atom, a C1-C6 carboxylate ester group, a straight-chain or branched C1-C6-alkoxy group, a straight-chain or branched C1-C6-alkoxy group interrupted by one or two hetero atoms, a hydroxyethoxy group, a dihydroxypropoxy group or a nitrile group; furthermore oxidation colorants for keratin fibers containing these compounds and a method for producing said compounds.

Abstract: The invention relates to a cosmetic agent which is made essentially of a peptide linker and at least one cosmetic active ingredient which is covalently connected thereto.

Abstract: The new 7-nitro-2,1,3-benzoxadiazole compounds and 7-nitro-2,1,3-benzthiadiazole compounds of formula (I) are: Dyeing agents for keratin fibers, containing the compounds of formula (I), and methods of dyeing hair with these dyeing agents are described.

Abstract: The present patent application has for an object an agent for the simultaneous brightening and coloring of keratin fibers based on a coupler-developer combination that has a basic pH and contains as developer at least one heterocyclic hydrazone derivative of formula (I) or a physiologically compatible salt thereof, at least one common coupler and as oxidant at least one combination of persulfate salts and hydrogen peroxide or an addition compound thereof; a multicomponent kit and a method for coloring keratin fibers.

Abstract: The object of the present patent application are agents for dyeing keratin fibers based on a developer-coupler combination and characterized in that they contain at least one 3-aminophenol derivative of formula (I) or a physiologically compatible, water-soluble salt thereof wherein R1 denotes a group of the formula ?or a group of the formula ?as well as novel 3-aminophenol derivatives.

Abstract: N-benzyl-m-phenylenediamine derivatives of general formula (I) or the physiologically tolerated, water-soluble salts thereof and dyeing agents for keratin fibers containing these compounds.

Abstract: The objects of the present invention are an agent (A) for coloring fibers obtained by mixing two components (A1) and (A2), characterized in that component (A1) contains at least one 2-benzothiazolinone hydrazone derivative of formula (I) or a physiologically tolerated salt thereof and component (A2) contains at least one ortho-quinone of formula (II) or a para-quinone of formula (III), a method for coloring hair by use of said agent and a multicomponent kit for coloring hair.

Abstract: The object of the invention are (p-aminohydroxyphenyl)acrylamide derivatives of general formula (I) or the physiologically tolerated, water-soluble salts thereof and oxidative coloring agents for keratin fibers, containing these compounds.

Abstract: Keratin fiber coloring agents containing (1,1?-biphenyl)-2,4-diamine derivatives of general formula (I) or a physiologically tolerated salt thereof and novel (1,1?-biphenyl)-2,4-diamine derivatives.

Abstract: A method for the synthesis of 5-aryl-1,3,3,-trimethyl-2-methylene-indoline derivatives of Formula (I) or its salts of Formula (Ia) wherein 1 mole of a 5-aryl-2,3,3-trimethyl-3H-indole derivative of Formula (VII) is reacted for 1 to 44 hours at a temperature of 20° to 180° C. in an apolar, aprotic or polar, protic or polar aprotic solvent with 1 to 50 moles of a compound of Formula R1-A; new compounds of Formulas (I)/(Ia) and (V), obtainable by this method as well as an agent containing at least one compound of Formula (I)/(Ia) and a carbonyl/imine compound for dyeing keratinic fibers and a method for temporarily dyeing keratin fibers, for which the keratin fiber is dyed with the aforementioned agent and the dyeing, so obtained, is removed again at any later time by a sulfite preparation.

Abstract: The 3-aminophenol derivatives of formula (I), or the physiologically compatible, water-soluble salts thereof: wherein R1 represents a group of formula (II) or a group of formula (III): are useful as couplers in hair colorants. Agents for dyeing keratin fibers, especially hair, based on a developer-coupler combination containing these compounds and methods of dyeing using these agents are described.

Abstract: The object of the present patent application is an agent for coloring keratin fibers based on oxidative dye precursors and containing (a) at least one hydrazone derivative of formula (I) or a physiologically compatible salt thereof, (b) at least one coupler or a physiologically compatible salt thereof, and (c) a persulfate salt as oxidant; a multicomponent kit and a method for coloring keratin fibers by use of said agent.

Abstract: Dyeing agents for keratin fibers, containing N-heteroarylmethyl-m-phenylenediamine derivatives of general formula (I) or the salts thereof and new N-heteroarylmethyl-m-phenylenediamine derivatives.

Abstract: The object of the present patent application is an agent for coloring keratin fibers based on oxidative dyes and which contains as developer at least one heterocyclic hydrazone derivative of formula (I) (with X?S or O) and as oxidant at least one persulfate salt, further objects being a multicomponent kit and a method for coloring keratin fibers by use of said agent.

Abstract: The dye composition (A) for dyeing fibers, especially keratin fibers, such as human hair, is made by mixing a first component (A1) and a second component (A2) and adding an alkalizing agent or an acidifying agent, as needed. The second component (A2) consists of at least one compound with a nucleophilic reaction center and the first component (A1) consists of at least one 1-alkyl quinolinium derivative of formula (Ia) or (Ib): A multicomponent kit consisting of the first and second components packaged separately is also described as well as a method of dyeing fibers using the multicomponent kit.

Abstract: 1,3-Diamino-4-(aminomethyl)-benzene derivatives of the general Formula (I) or their physiologically tolerated, water-soluble salts, as well as agents for the oxidative dyeing of fibers, containing these compounds.

Abstract: The present invention has for an object compounds of formula (I) and colorants containing these 4-aminobiphenyl-3-ol derivatives of general formula (I) for dyeing keratin fibers, particularly hair, wherein R1 and R2 independently of each other denote hydrogen, a halogen atom, a cyano group, a hydroxyl group, a C1-C4-alkoxy group, a C2-C4-hydroxyalkoxy group, a C1-C6-alkyl group, a nitro group, a trifluoromethyl group, a —C(O)H group, a —C(O)CH3 group, a —C(O)CF3 group, an —Si(CH3)3 group or a C1-C6-hydroxyalkyl group or R1 and R2 together form an —O—CH2—O— bridge.

Abstract: The new 7-nitro-2,1,3-benzoxadiazole compounds and 7-nitro-2,1,3-benzthiadiazole compounds of formula (I) are: Dyeing agents for keratin fibers, containing the compounds of formula (I), and methods of dyeing hair with these dyeing agents are described.

Abstract: The new N-heteroarylmethyl-p-phenylenediamine derivatives have the general formula (I), Oxidation hair dyeing agents are described based on a combination of developing and coupling substance, which contain at least one N-heteroarylmethyl-phenylenediamine derivative of the formula (I), or a physiologically tolerated salt thereof.