Patent ID: 8021438

Claim:
Agent for dyeing and simultaneously lightening keratinic fibers comprising in a cosmetic carrier: at least one oxidation dye precursor, and at least one cationic acylpyridinium derivative according to the following Formula (I), wherein R1 is a C 1 -C 6 alkyl group, a C 2 -C 6 alkenyl group, a C 2 -C 6 hydroxyalkyl group, a C 1 -C 6 alkoxy C 2 -C 6 alkyl group, a carboxy C 2 -C 6 alkyl group, an aryl C 1 -C 6 alkyl group, a heteroaryl C 1 -C 6 alkyl group, an aryl group or a heteroaryl group; R2 is an acyl group according to the formula R′C(O) in which R′ is a C 1 -C 6 alkyl group, a C 2 -C 6 hydroxyalkyl group, a C 1 -C 6 alkoxy C 2 -C 6 alkyl group, a carboxy C 1 -C 6 alkyl group, an aryl C 1 -C 6 alkyl group, or a heteroaryl C 1 -C 6 alkyl group; R3, R4 and R5 are, independently of one another, a hydrogen atom, a hydroxyl group, an amino group, a di-(C 1 -C 6 alkyl)amino group, a C 1 -C 6 alkyl group, a C 1 -C 6 alkoxy group, a C 1 -C 6 alkoxy C 2 -C 6 alkyl group, a halogen, a nitro group, a carboxy group, a nitrile group, an optionally substituted aryl group, a C 2 -C 6 alkenyl group, an optionally substituted heteroaryl group; and X − is a physiologically acceptable anion.