Abstract: Novel cationic 4,5-diaminopyrazole derivatives of general formula (I) the colorants for keratin fibers containing these compounds and a process for producing the compounds of formula (I).

Abstract: A process for the preparation of 4-hydroxyalkylamino-2-nitro-anisoles of the general formula (I) wherein m is 2 or 3; by reaction of a 4-halogeno-3-nitro-aniline of formula (II) with a chloroalkyl-chloroformate of formula (III), alkaline ring closure of the resulting carbamate and nucleophilic replacement of the halogeno atom by a methoxy group to form a derivative of formula (IV), and finally ring opening of the resulting cyclic carbamate by treatment with methanolic alkali metal hydroxide, followed by neutralization with inorganic or organic acids, wherein the complete reaction is executed in a non-aqueous medium; as well as process for the preparation of 2-amino-4-hydroxyalkylamino-anisoles of formula (V)

Abstract: The present invention relates to novel m-diaminobenzenes of formula (I) to the use thereof in colorants and to the oxidative hair colorants containing said m-diaminobenzenes.

Abstract: A process for the preparation of 4-hydroxyalkylamino-2-nitro-anisoles of the general formula (I) wherein m is 2 or 3; by reaction of a 4-halogeno-3-nitro-aniline of formula (II) with a chloroalkyl-chloroformate of formula (III), alkaline ring closure of the resulting carbamate and nucleophilic replacement of the halogeno atom by a methoxy group to form a derivative of formula (IV), and finally ring opening of the resulting cyclic carbamate by treatment with methanolic alkali metal hydroxide, followed by neutralization with inorganic or organic acids, wherein the complete reaction is executed in a non-aqueous medium; as well as process for the preparation of 2-amino-4-hydroxyalkylamino-anisoles of formula (V).

Abstract: N-Aryl-4,5-diaminopyrazole of formula (I) or a physiologically compatible salt thereof of an organic or inorganic acid wherein R1 and R2 independently of each other denote a hydrogen atom, a straight-chain or branched C1–C6-alkyl group, a hydroxyl group, a straight-chain or branched C1–C6-monohydroxyalkyl group, a straight-chain or branched C3–C6-dihydroxyalkyl group, a straight-chain or branched C1–C6-alkoxy group, a straight-chain or branched C1–C6-hydroxyalkoxy group, a straight-chain or branched C3–C6-dihydroxyalkoxy group, an amino group, a C1–C4-monoalkylamino group, a di(C1–C4)-alkylamino group, a halogen atom, a difluoromethyl group or a trifluoromethyl group; Y stands for a nitrogen atom or a C-R3 group, wherein C is a carbon atom of the aromatic ring and R3 is a hydrogen atom, a halogen atom, a straight-chain or branched C1–C6-alkyl group, a straight-chain or branched C1–C6-hydroxyalkyl group, a straight-chain or branched C1–C6-alkoxy group, a straight-chain or branched C2-C6-hydroxyalkoxy grou

Abstract: Novel cationic 4,5-diaminopyrazole derivatives of general formula (I) the colorants for keratin fibers containing these compounds and a process for producing the compounds of formula (I).

Abstract: The present invention relates to novel m-diaminobenzenes of formula (I) to the use thereof in colorants and to the oxidative hair colorants containing said m-diaminobenzenes.

Abstract: N-Aryl-4,5-diaminopyrazole of formula (I) or a physiologically compatible salt thereof of an organic or inorganic acid wherein R1 and R2 independently of each other denote a hydrogen atom, a straight-chain or branched C1-C6-alkyl group, a hydroxyl group, a straight-chain or branched C1-C6-monohydroxyalkyl group, a straight-chain or branched C3-C6-dihydroxyalkyl group, a straight-chain or branched C1-C6-alkoxy group, a straight-chain or branched C1-C6-hydroxyalkoxy group, a straight-chain or branched C3-C6-dihydroxyalkoxy group, an amino group, a C1-C4-monoalkylamino group, a di(C1-C4)-alkylamino group, a halogen atom, a difluoromethyl group or a trifluoromethyl group; Y stands for a nitrogen atom or a C—R3 group, wherein C is a carbon atom of the aromatic ring and R3 is a hydrogen atom, a halogen atom, a straight-chain or branched C1-C6-alkyl group, a straight-chain or branched C1-C6-hydroxyalkyl group, a straight-chain or branched C1-C6-alkoxy group, a straight-chain or branched C2-C6-hydroxyalkoxy gr

Abstract: The new diaminopyrazole compounds are bridged 4,5-diaminopyrazole compounds or salts thereof.

Abstract: The new diaminopyrazole compounds are bridged 4,5-diaminopyrazole compounds or salts thereof.