Abstract: o-Aminophenol derivatives of the general formula (I) or physiologically compatible, water-soluble salts thereof, in which X is oxygen, sulfur or N—R4; R1, R2, R3 may be identical or different and, independently of one another, are hydrogen, a halogen atom, a cyano group, a C1-C4-alkoxy group, a C1-C6-alkyl group, a C1-C4-alkyl thioether group, a mercapto group, a nitro group, a trifluoromethane group, a —C(O)H group, a —C(O)CH3 group, a —C(O)CF3 group, an —Si(CH3)3 group, a C1-C4-hydroxyalkyl group or an aminomethyl group; R4 is hydrogen, a C1-C6-alkyl group, a C1-C4-hydroxy-alkyl group, a phenyl group or an acetyl group; and colorants containing said compounds for keratin fibers.

Abstract: The object of the present patent application are agents for the oxidative coloring of keratin fibers, particularly hair, based on a developer substance-coupler substance combination, characterized in that they contain at least one meta-aminophenol derivative of general formula (I) wherein R1 denotes hydrogen, a C1-C6 alkyl group, a C2-C4 hydroxyalkyl group, a C2-C4 dihydroxyalkyl group, a C1-C4 alkoxy group or a halogen atom; and R2 denotes hydrogen, a hydroxy group, a carboxylic group, an aminocarbonyl group or a hydroxymethyl group.

Abstract: 4-(Pyrazol-4-ylimino)-2,5-cyclohexadienylidene-ammonium salts of the general formula(I) and colorants comprising these compounds for keratin fibres.

Abstract: o-Aminophenol derivatives of the general formula (I) or physiologically compatible, water-soluble salts thereof, in which X is oxygen, sulfur or N—R4; R1, R2, R3 may be identical or different and, independently of one another, are hydrogen, a halogen atom, a cyano group, a C1-C4-alkoxy group, a C1-C6-alkyl group, a C1-C4-alkyl thioether group, a mercapto group, a nitro group, a trifluoromethane group, a —C(O)H group, a —C(O)CH3 group, a —C(O)CF3 group, an —Si(CH3)3 group, a C1-C4-hydroxyalkyl group or an aminomethyl group; R4 is hydrogen, a C1-C6-alkyl group, a C1-C4-hydroxy-alkyl group, a phenyl group or an acetyl group; and colorants containing said compounds for keratin fibers.

Abstract: 4-(Pyrazol-4-ylimino)-2,5-cyclohexadienylidene-ammonium salts of the general formula (I) and colorants comprising these compounds for keratin fibres.

Abstract: p-Diaminobenzene derivatives of the general Formula (I) or their physiologically compatible, water-soluble salts, as well as dyes for keratin fibers that contain these compounds.

Abstract: The object of the present patent application are agents for the oxidative coloring of keratin fibers, particularly hair, based on a developer substance-coupler substance combination, characterized in that they contain at least one meta-aminophenol derivative of general formula (I) wherein R1 denotes hydrogen, a C1-C6 alkyl group, a C2-C4 hydroxyalkyl group, a C2-C4 dihydroxyalkyl group, a C1-C4 alkoxy group or a halogen atom; and R2 denotes hydrogen, a hydroxy group, a carboxylic group, an aminocarbonyl group or a hydroxymethyl group.

Abstract: Pro-dyes of direct dyes having an enzymatically-labile functionality, e.g. glutaramide derivatives of direct dyes of formula (I) or their physiologically acceptable salts, are described, as well as compositions for dyeing keratinous fibers containing these pro-dyes, as well as compositions for dyeing keratinous fibers containing a combination of at least one pro-dye and at least one enzyme capable of cleaving the glutaramide functionality in the pro-dye. A method for dyeing keratinous fibers with the aforementioned dyeing compositions is also described.

Abstract: 1,3-Dihydroxybenzene derivatives of general formula (I) or (Ia) or physiologically tolerated, water-soluble salts thereof wherein R?1 denotes a substituted pyridyl group, a pyrimidyl group, a group of formula (IIa) or (IIIa) and the dyeing agents for keratin 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 C1–6-hydroxyalkyl group or R1 and R2 together form an —O—CH2—O— bridge.

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 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: 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: 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 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.

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: 1,4-Diamino-2-(thiazol-2-yl)benzene derivatives of general formula (I) and the physiologically tolerated, water-soluble salts thereof: and agents containing these compounds, for oxidative dyeing of keratin fibers.

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