Cationic quinoxaline thiazole azo dye-containing colorants

1. An agent for the nonoxidative coloring of keratin fibers, comprising from 0.01% to 10% by weight of at least one cationic quinoxaline thiazole azo dye of the general formula (I),

in which

R1 is a hydrogen atom, an amino group, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a hydroxyl group, a nitro group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group or a carboxylic acid group (—COOH);

R2 is a group of the general formulae (II) to (VI),

where R1′ is a hydrogen atom, an amino group, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a hydroxyl group, a nitro group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group or a carboxylic acid group (—COOH);

R4′ is hydrogen, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylcarboxamide group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group, a C 1 -C 6 -alkylsulfonamide group or a phenyl group;

R4 and R5, independently of one another, are hydrogen, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylcarboxamide group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group, a C 1 -C 6 -alkylsulfonamide group or a phenyl group, or R4 and R5, together with the nitrogen atom to which they are bonded, form a saturated, unsaturated or aromatic heterocycle with at least four ring members; and

R6 and R7, independently of one another, are hydrogen, an amino group, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -N,N-(dihydroxyalkyl)amino group, fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 6 -alkylcyano group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -hydroxyalkyloxy group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylcarboxamide group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group, a C 1 -C 6 -alkylsulfonamide group, a phenyl group or a sulfonic acid group;

R3 is a C 1 -C 6 -alkyl group, a C 2 -C 4 -hydroxyalkyl group or a C 4 -C 6 -polyhydroxyalkyl group;

where the alkyl groups may in each case be branched or linear, and

X— is an anion.

2. The agent as claimed in claim 1 , further comprising at least one natural polymer, synthetic polymer or modified polymer of natural origin customary for cosmetic agents, and is in the form of a setting tint or setting color.

3. An agent for the simultaneous lightening and coloring of keratin fibers comprising: (i) an oxidizing agent and (ii) at least one cationic quinoxaline thiazole azo dye of the general formula (I),

in which

R1 is a hydrogen atom, an amino group, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a hydroxyl group, a nitro group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group or a carboxylic acid group (—COOH);

R2 is a group of the general formulae (II) to (VI),

where R1′ is a hydrogen atom, an amino group, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a hydroxyl group, a nitro group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group or a carboxylic acid group (—COOH);

R4′ is hydrogen, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylcarboxamide group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group, a C 1 -C 6 -alkylsulfonamide group or a phenyl group;

R4 and R5, independently of one another, are hydrogen, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylcarboxamide group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group, a C 1 -C 6 -alkylsulfonamide group or a phenyl group, or R4 and R5, together with the nitrogen atom to which they are bonded, form a saturated, unsaturated or aromatic heterocycle with at least four ring members; and

R6 and R7, independently of one another, are hydrogen, an amino group, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -N,N-(dihydroxyalkyl)amino group, fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 6 -alkylcyano group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -hydroxyalkyloxy group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylcarboxamide group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group, a C 1 -C 6 -alkylsulfonamide group, a phenyl group or a sulfonic acid group;

R3 is a C 1 -C 6 -alkyl group, a C 2 -C 4 -hydroxyalkyl group or a C 4 -C 6 -polyhydroxyalkyl group;

where the alkyl groups may in each case be branched or linear, and

X— is an anion.

4. The agent as claimed in claim 3 , wherein the oxidizing agent is chosen from hydrogen peroxide or its addition compounds onto urea, melamine, sodium borate or sodium carbonate.

5. An agent for the oxidative coloring of keratin fibers based on oxidation dye precursors, comprising at least one cationic quinoxaline thiazole azo dye of the general formula (I),

in which

R1 is a hydrogen atom, an amino group, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a hydroxyl group, a nitro group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group or a carboxylic acid group (—COOH);

R2 is a group of the general formulae (II) to (VI),

where R1′ is a hydrogen atom, an amino group, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a hydroxyl group, a nitro group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group or a carboxylic acid group (—COOH);

R4′ is hydrogen, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylcarboxamide group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group, a C 1 -C 6 -alkylsulfonamide group or a phenyl group;

R4 and R5, independently of one another, are hydrogen, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -alkylcyano group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylcarboxamide group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group, a C 1 -C 6 -alkylsulfonamide group or a phenyl group, or R4 and R5, together with the nitrogen atom to which they are bonded, form a saturated, unsaturated or aromatic heterocycle with at least four ring members; and

R6 and R7, independently of one another, are hydrogen, an amino group, a C 1 -C 6 -alkylamino group, a C 1 -C 6 -N,N-dialkylamino group, a C 1 -C 6 -N,N-(dihydroxyalkyl)amino group, fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 6 -alkylcyano group, a methoxymethyl group, a tert-butyl group, an isopropyl group, a C 1 -C 6 -alkyl group, a C 1 -C 6 -alkyloxy group, a C 1 -C 6 -hydroxyalkyl group, a C 1 -C 6 -hydroxyalkyloxy group, a C 1 -C 6 -alkylcarboxylic acid group, a C 1 -C 6 -alkylcarboxylic acid ester group, a C 1 -C 6 -alkylcarboxamide group, a C 1 -C 6 -alkylsulfonic acid group, a C 1 -C 6 -alkylsulfonic acid ester group, a C 1 -C 6 -alkylsulfonamide group, a phenyl group or a sulfonic acid group;

R3 is a C 1 -C 6 -alkyl group, a C 2 -C 4 -hydroxyalkyl group or a C 4 -C 6 -polyhydroxyalkyl group;

where the alkyl groups may in each case be branched or linear, and

X— is an anion.

6. The agent as claimed in claim 5 , characterized in that it comprises 0.01 to 12% by weight of at least one oxidation dye precursor.

7. The agent as claimed in claim 1 , wherein the cationic quinoxaline thiazole azo dye of the general formula (I) is chosen from 6-carboxy-2-{(E)-[4-(diethylamino)phenyl]azo}-3-methyl[1,3]thiazolo[4,5-b]quinoxal-in-3-ium methylsulfate, 6-carboxy-2-((E)-{4-[(2-hydroxyethyl)amino]phenyl}azo)-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 2-((E)-{4-[bis(2-hydroxyethyl)amino]phenyl}azo)-6-carboxy-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-carboxy-2-((E)-{4-[(2-hydroxyethyl)(methyl)amino]phenyl}azo)-3-methyl-[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-carboxy-2-((E)-{4-[ethyl(2-hydroxyethyl)amino]phenyl}azo)-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-carboxy-2-((E)-{4-[cyano(ethyl)amino]phenyl}azo)-3-methyl-[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-nitro-2-{(E)-[4-(diethylamino)phenyl]azo}-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-methoxy-2-((E)-{4-[(2-hydroxyethyl)amino]phenyl}azo)-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-hydroxy-2-((E)-{4-[bis(2-hydroxyethyl)amino]phenyl}azo)-6-carboxy-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-nitro-2-((E)-{4-[(2-hydroxyethyl)(methyl)amino]phenyl}azo)-3-methyl-[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-methoxy-2-((E)-{4-[ethyl(2-hydroxyethyl)amino]phenyl}azo)-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate and 6-carboxy-2-{(E)-[4-dimethylamino)phenyl]azo}-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methyl-sulfate.

8. The agent as claimed in claim 3 , wherein the cationic quinoxaline thiazole azo dye of the general formula (I) is present in a total amount of from 0.01 to 10% by weight.

9. The agent as claimed in claim 1 , wherein the agent is a hair colorant.

10. The agent as claimed in claim 3 , wherein the cationic quinoxaline thiazole azo dye of the general formula (I) is chosen from 6-carboxy-2-{(E)-[4-(diethylamino)phenyl]azo}-3-methyl[1,3]thiazolo[4,5-b]quinoxal-in-3-ium methylsulfate, 6-carboxy-2-((E)-{4-[(2-hydroxyethyl)amino]phenyl}azo)-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 2-((E)-{4-[bis(2-hydroxyethyl)amino]phenyl}azo)-6-carboxy-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-carboxy-2-((E)-{4-[(2-hydroxyethyl)(methyl)amino]phenyl}azo)-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-carboxy-2-((E)-{4-[ethyl(2-hydroxyethyl)amino]phenyl}azo)-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-carboxy-2-((E)-{4-[cyano(ethyl)amino]phenyl}azo)-3-methyl-[1,3]thiazol[4,5-b]quinoxalin-3-ium methylsulfate, 6-nitro-2-{(E)-[4-(diethylamino)phenyl]azo}-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-methoxy-2-((E)-{4-[(2-hydroxyethyl)amino]phenyl}azo)-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-hydroxy-2-((E)-{4-[bis(2-hydroxyethyl)amino]phenyl}azo)-6-carboxy-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-nitro-2-((E)-{4-[(2-hydroxyethyl)(methyl)amino]phenyl}azo)-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate, 6-methoxy-2-((E)-{4-[ethyl(2-hydroxyethyl)amino]phenyl}azo)-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methylsulfate and 6-carboxy-2-{(E)-[4-(dimethylamino)phenyl]azo}-3-methyl[1,3]thiazolo[4,5-b]quinoxalin-3-ium methyl-sulfate.

11. The agent as claimed in claim 1 , wherein the anion X − is selected from the group consisting of: a sulfate anion, a phosphate anion, a hydrogen phosphate anion, an oxalate anion, a formate anion, an acetate anion, a citrate anion, a tartrate anion, a malonate anion, a pyruvate anion, an iodide anion, a chloride anion, a bromide anion, and a methylsulfate anion.

12. The agent as claimed in claim 3 , wherein the anion X − is selected from the group consisting of: a sulfate anion, a phosphate anion, a hydrogen phosphate anion, an oxalate anion, a formate anion, an acetate anion, a citrate anion, a tartrate anion, a malonate anion, a pyruvate anion, an iodide anion, a chloride anion, a bromide anion, and a methylsulfate anion.

13. The agent as claimed in claim 5 , wherein the anion X − is selected from the group consisting of: a sulfate anion, a phosphate anion, a hydrogen phosphate anion, an oxalate anion, a formate anion, an acetate anion, a citrate anion, a tartrate anion, a malonate anion, a pyruvate anion, an iodide anion, a chloride anion, a bromide anion, and a methylsulfate anion.