Oxidizing hair coloring agents containing 2,5-diamino-1-phenylbenzene derivatives and novel 2,5-diamino-1-phenylbenzene derivatives

Coloring agent for the oxidative coloring of keratinic fibers based on a developer/coupler comibination, characterized in that it contains as the developer a 2,5-diamino-1-phenylbenzene derivative of general formula (I)

• wherein
• R1, R2, R3 and R4 independently of each other denote hydrogen, a C1-C6 alkyl, C1-C4 hyroxyalkyl, C2-C4 dihydroxyalkyl or C1-C4 alkoxy-(C1-C4) alkyl group, or R1 and R2 or R3 and R4 form a four-membered to eight-membered aliphatic ring, with at least two of the R1 to R4 groups denoting hydrogen;
• R5 denotes hydrogen, a hydroxyl group, a halogen atom or a C1-C4 alkyl, C1-C4 hyroxyalkyl or C1-C4 alkoxy group;
• R6, R7, R8, R9 and R10 independently of each other denote hydrogen, a halogen atom or a cyano, hydroxyl, C1-C4 alkoxy, C1-C6 alkyl, C1-C4 alkyl thioether, mercapto, nitro, amino, alkylamino, dialkylamino, trifluoromethane, —C(OH), —C(O)CH3, —C(O)CF3, —Si(CH)3, C1-C4 hydroxyalkyl, C3-C4 dihydroxyalkyl, —CH═CHR11 or —(CH2)p-CO2R12 group or a —(CH2)p—R13 group, where p=1, 2, 3 or 4, or a —C(R14)═NR15 group or a C(R17)H—NR18R19 group, or two adjacent R6 to R10 groups form a —O—CH2—O bridge;
• with the proviso that at least one of R6 and R9 is not an amino group if R1, R2, R3 and R4 are hydrogen;
• R11 denotes hydrogen, a hydroxyl, nitro, amino, CO2R12 or —C(O)CH3 group;
• R12, R14 and R17 independently of each other denote hydrogen or a C1-C4 alky group;
• R13 denotes an amino or nitrile group;
• R15, R18 and R19 independently of each other denote hydrogen, a hydroxyl, C1-C4 alkyl, C1-C6 hydroxyalkyl or C3-C4 dihydroxyalkyl group or a radical of formula
• and
• R16 denotes hydrogen, an amino group or a hydroxyl group or a physiologically acceptable, water-soluble salt thereof.