Reductive colorant for keratin fibres

An agent for colouring keratin-containing fibres, comprising a) ascorbic acid, b) at least one oxime compound of the formula A1-A23;

• in which
• R1 is a cyano group, a substituted or unsubstituted aryl group or a substituted or unsubstituted, saturated or unsaturated heterocycle or a group —C—(O)—R3, where R3 is a hydrogen atom or a C1-C6-alkyl group;
• R2 is a cyano group, a substituted or unsubstituted C1-C6-alkyl group, a C3-C6-cycloalkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted aminoaryl group or a substituted or unsubstituted, saturated or unsaturated heterocycle;
• R4 is a cyano group, a substituted or unsubstituted aryl group, a substituted or unsubstituted, saturated or unsaturated heterocycle or a group —C—(O)—R6, where R6 is a hydrogen atom or a C1-C6-alkyl group;
• R5 is a substituted or unsubstituted C2-C6-alkyl group, a C3-C6-cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aminoaryl group, a substituted or unsubstituted, saturated or unsaturated heterocycle;
• in which R7 and R8 may be identical or different and, independently of one another, are a substituted or unsubstituted aryl group, an aryl-C1-C4-alkyl group, a substituted or unsubstituted, saturated or unsaturated heterocycle, a substituted or unsubstituted C1-C6-alkyl group, an acetyloxy group, a C3-C6-cycloalkyl group, a substituted or unsubstituted aminoaryl group, where R7 may be a C1-C6-alkoxy group;
• R9 is a hydrogen atom or a substituted or unsubstituted C1-C6-alkyl group;
• R10 and R11 may be identical or different and, independently of one another, are a substituted or unsubstituted aryl group, an aryl-C1-C4-alkyl group, a C1-C6-alkyl group, a C3-C6-cycloalkyl group, a C2-C6-alkylene group or a bicycle bonded via the radicals R10 and R11;
• X is an oxygen atom or a sulphur atom;
• D is an oxygen atom, a sulphur atom, a sulphoxyl group, a sulphonyl group or a group N—R12a, where R12a is a hydrogen atom or a substituted or unsubstituted C1-C6-alkyl group;
• and R12 and R13, independently of one another, are a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a hydroxyl group, a nitro group, a C1-C6-alkyl group, a C1-C6-alkoxy group, a carboxamide group, a sulphonamide group, a carboxyl group, a C1-C4-acyl group, a cyano group or an amino group —NR14R15. where R14 and R15, independently of one another, are a hydrogen atom or a C1-C6-alkyl group;
• E is an oxygen atom, a sulphur atom or a group 1NR7, where R17 is a hydrogen atom or a substituted or unsubstituted C1-C6-alkyl group;
• R16 is a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a hydroxyl group, a nitro group, a C1-C6-alkyl group, a C1-C6-alkoxy group, a carboxamide group, a sulphonamide group, a carboxyl group, a C1-C4-acyl group, a cyano group or an amino group —NR18R19, where R18 and R19, independently of one another, are a hydrogen atom or a C1-C6-alkyl group;
• R20 is a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, a C1-C6-alkoxy group or a substituted or unsubstiturted C1-C6-alkyl group;
• R21 is a hydrogen atom or a C1-C4-alkyl group;
• R22 is a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, a C1-C6-alkyl group, a C1-C6-alkoxy group, a carboxyl group, a carboxamide group, a cyano group or an amino group —NR23R24, where R23 and R24, independently of one another, are a hydrogen atom or a C1-C6-alkyl group;
• Z is an oxygen atom or a group —NR26, where R26 is a hydrogen atom or a C1-C6-alkyl group;
• Z′ is a sulphur atom or a group —NR27, where R27 is a hydrogen atom or a C1-C6-alkyl group;
• R25 is a hydrogen atom, a C1-C6-alkyl group or a C1-C4-carboxyalkyl group;
• R28 and R29 may be identical or different and, independently of one another, are a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a hydroxyl group, a nitro group, a C1-C6-alkyl group, a C1-C6-alkoxy group, a carboxamide group, a sulphonamide group, a carboxyl group, a C1-C4-acyl group, a cyano group or an amino group —NR30R31, where R30 and R31, independently of one another, are a hydrogen atom or a C1-C6-alkyl group;
• R32 and R33 may be identical or different and, independently of one another, are a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a hydroxyl group, a nitro group, a C1-C6-alkyl group, a C1-C6-alkoxy group, a carboxamide group, a sulphonamide group, a carboxyl group, a C1-C4-acyl group, a cyano group or an amino group —NR35R36, where R35 and R36, independently of one another, are a hydrogen atom or a C!-C6-alkyl group:
• R34 is a hydrogen atom or a C1-C6-alkyl group;
• R37 and R38 may be identical or different and, independently of one another, are a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a hydroxyl group, a nitro group, a C1-C6-alkyl group, a C1-C6-alkoxy group, a carboxamide group, a sulphonamide group, a carboxyl group, a C1-C4-acyl group, a cyano group or an amino group —NR39R40, where R39 and R40, independently of one another, are a hydrogen atom or a C1-C6-alkyl group;
• G is a fused, substituted or unsubstituted aromatic or heteroaromatic ring to which a further aromatic or heteroaromatic ring may additionally be fused;
• R41 and R42 may be identical or different and, independently of one another, are a hydrogen atom or a substituted or unsubstituted C1-C6-alkyl group;
• M1 is an oxygen atom, a sulphur atom or an NH group;
• and M2 and M3 may be identical or different and, independently of one another, are an oxygen atom or an NH group;
• R43 is a substituted or unsubstituted C1-C6-alkyl group;
• R44 is a substituted or unsubstituted aryl group or an aryl-C1-C4-alkyl group, a substituted or unsubstituted, saturated or unsaturated heterocycle, a substituted or unsubstituted C1-C6-alkyl group, an acetyloxy group, a C3-C6-cycloalkyl group, a C1-C6-alkoxy group or a substituted or unsubstituted aminoaryl group;
• and
• X− is a counterion;
• and c) at least one reactive carbonyl compound of the formula B1-B17;
• in which
• R45 is a substituted or unsubstituted aryl group to which a further aromatic ring may optionally also be fused, a substituted or unsubstituted, saturated or unsaturated heterocycle;
• n is 0, 1,2 or 3;
• R46 is a C1-C6-alkyl group, a substituted or unsubstituted aryl radical or a substituted or unsubstituted, saturated or unsaturated heterocycle;
• R47 is a pyrrole radical, an imidazole radical, a pyrazole radical, a indole radical, a pyrrolidine radical, a morpholine radical, a dimethylamine radical, a phenol radical or a thiophenol radical, where these radicals are in each case bonded to the general formula B2 via the heteroatom;
• R48 and R49 may be identical or different and, independently of one another, are a substituted or unsubstituted aryl group, an aryl-C1-C4-alkyl group, a substituted or unsubstituted, saturated or unsaturated heterocycle, a substituted or unsubstituted C1-C6-alkyl group, an acetyloxy group, a C3-C6-cycloalkyl group or a substituted or unsubstituted aminoaryl group, and R48 may be a C1-C6-alkoxy group;
• D has the abovementioned meaning;
• R50 and R51 may be identical or different and, independently of one another, are a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a hydroxyl group, a nitro group, a C1-C6-alkyl group, a C1-C6-alkoxy group, a carboxamide group, a sulphonamide group, a carboxyl group, a C1-C4-acyl group, a cyano group or an amino group —NR52R53, where R52 and R53, independently of one another, are a hydrogen atom or a C1-C6-alkyl group;
• E has the abovementioned meaning;
• R54 is a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a hydroxyl group, a nitro group, a C1-C6-alkyl group, a C1-C6-alkoxy group, a carboxamide group, a sulphonamide group, a carboxyl group, a C1-C4-acyl group, a cyano group or an amino group —NR55R56, where R55 and R56, independently of one another, are a hydrogen atom or a C1-C6-alkyl group;
• R57 is a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, a C1-C6-alkoxy group or a substituted or unsubstituted C1-C6-alkyl group;
• R58 is a hydrogen atom or a C1-C4-alkyl group;
• R59 is a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, a C1-C6-alkyl an amino group —NR60R61, where R60 and R61, independently of one another, are a hydrogen atom or a C1-C6-alkyl group;
• R62 and R63 may be identical or different and, independently of one another, are a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a hydroxyl group, a nitro group, a C1-C6-alkyl group, a C1-C6-alkoxy group, a carboxamide group, a sulphonamide group, a carboxyl group, a C1-C4-acyl group, a cyano group or an amino group —NR64R65, where R64 and R65, independently of one another, are a hydrogen atom or a C1-C6-alkyl group;
• in which G has the abovementioned meaning;
• R66 and R67 may be identical or different and, independently of one another, are a C1-C6-alkyl group or a substituted or unsubstituted aryl group;
• and
• R68 is a substituted or unsubsituted C1-C6-alkyl group, a C1-C6-alkylene group or a substituted or unsubstituted aryl group.