Isatin derivatives for coloring keratin-containing fibers

A composition for coloring keratin-containing fibers comprising:

• (a) at least one isatin derivative corresponding to formula I:
• ##STR8## wherein R.sup.1 is hydrogen, a C.sub.1-4 alkyl group, C.sub.2-4 hydroxyalkyl group, C.sub.2-20 acyl group, a benzyl or phenyl group, R.sup.2 is hydrogen, a C.sub.1-4 alkyl group, C.sub.1-4 alkoxy group, a hydroxy, halogen or nitro group, X is a sulfo group --SO.sub.3 H or a carboxyl group --COOH and n is an integer from 0 to 3, including water-soluble salts thereof;
• and
• (b) a compound selected from the group consisting of (i) at least one amino acid, (ii) an oligopeptide having from 2 to 9 amino acids, (iii) an aromatic amine corresponding to formula II:
• ##STR9## wherein R.sup.3, R.sup.4 and R.sup.5 are hydrogen, C.sub.1-4 alkyl groups, hydroxy groups, carboxyl groups, sulfo groups, C.sub.1-4 aminoalkyl groups or NR.sup.6 R.sup.7 groups, wherein R.sup.6 and R.sup.7 independently of one another are hydrogen, C.sub.1-4 alkyl groups, aryl groups or C.sub.2-4 hydroxyalkyl groups, with the proviso that at most two of the groups R.sup.3, R.sup.4 and R.sup.5 are simultaneously hydrogen or C.sub.1-4 alkyl groups;
• and wherein two of the groups R.sup.3, R.sup.4 and R.sup.5 together may also form a fused benzene ring optionally substituted by a C.sub.1-4 alkyl group, hydroxy group, carboxyl group, sulfo group, C.sub.1-4 aminoalkyl group or amino group, (iv) an aromatic amine corresponding to formula III:
• ##STR10## wherein R.sup.8 and R.sup.9 independently of one another represent hydrogen, C.sub.1-4 alkyl groups, hydroxy groups or amino groups, n is an integer of 2 to 4 and m is an integer of 1 to 4, (v) at least one aminopyrimidine corresponding to formula (IV):
• ##STR11## wherein R.sup.10, R.sup.11, R.sup.12, R.sup.13, R.sup.14 and R.sup.15 independently of one another are hydrogen, C.sub.1-4 alkyl groups or C.sub.2-4 hydroxyalkyl groups and Z is hydrogen, an OH group or an NR.sup.16 R.sup.17 group, wherein R.sup.16 and R.sup.17 independently of one another are hydrogen, C.sub.1-4 alkyl groups or C.sub.2-4 hydroxyalkyl groups, (vi) at least one indole derivative corresponding to general formula (V):
• ##STR12## wherein R.sup.18 is hydrogen, a C.sub.1-4 alkyl group or C.sub.2-4 acyl group, R.sup.19 is hydrogen or a carboxyl group and R.sup.20, R.sup.21 and R.sup.22 are hydrogen, C.sub.1-4 alkyl groups, C.sub.2-4 acyloxy groups, hydroxy groups, amino groups or C.sub.1-4 alkoxy groups, with the proviso that at most two of the groups R.sup.20, R.sup.21 and R.sup.22 are simultaneously hydrogen C.sub.1-4 alkyl groups, and (vii) at least one indoline derivative corresponding to general formula (VI):
• ##STR13## wherein R.sup.23 is hydrogen, a C.sub.1-4 alkyl group or C.sub.2-4 acyl group, R.sup.24 is hydrogen or a carboxyl group and R.sup.25, R.sup.26 and R.sup.27 are hydrogen, C.sub.1-4 alkyl groups, C.sub.2-4 acyloxy groups, hydroxy groups, amino groups or C.sub.1-4 alkoxy groups, with the proviso that at most two of the groups R.sup.25, R.sup.26 and R.sup.27 are simultaneously hydrogen C.sub.1-4 alkyl groups.