Patent ID: 7105032

Claim:
A composition for dyeing keratin-containing fibers comprising at least one 1,2-dihydropyrimidinium derivative (component A) according to Formula I and/or its enamine form wherein R 1 and R 2 independently of one another are a linear or cyclic C 1 –C 6 alkyl group, a C 2 –C 6 alkenyl group, an optionally substituted aryl group, an optionally substituted heteroaryl group, an aryl C 1 –C 6 alkyl group, a C 1 –C 6 hydroxyalkyl group, a C 2 –C 6 polyhydroxyalkyl group, a C 1 –C 6 alkoxy-C 1 –C 6 alkyl group, a group R I R II N—(CH 2 ) m — in which R I and R II independently of one another stand for a hydrogen atom, a C 1 –C 4 alkyl group, a C 1 –C 4 hydroxyalkyl group or an aryl C 1 –C 6 alkyl group, wherein R I and R II together with the nitrogen atom can form a 5-, 6-, or 7-membered ring, and m stands for a number 2, 3, 4, 5 or 6. R 3 and R 4 independently of one another are a hydrogen atom or an alkyl group, wherein at least one of the radicals R 3 and R 4 means a C 1 –C 6 alkyl group, R 5 is a hydrogen atom, a C 1 –C 6 alkyl group, a C 1 –C 6 hydroxyalkyl group, a C 2 –C 6 polyhydroxyalkyl group, a C 1 –C 6 alkoxy group, a C 1 –C 6 hydroxyalkoxy group, a group R III R IV N—(CH 2 ) q —, in which R III and R IV stand independently of one another for a hydrogen atom, a C 1 –C 6 alkyl group, a C 1 –C 6 hydroxyalkyl group or an aryl C 1 –C 6 alkyl group, and q stands for a number 1, 2, 3, 4, 5 or 6, wherein the radical R 5 together with one of the radicals R 3 or R 4 can form a 5- or 6-membered aromatic or aliphatic ring that can be optionally substituted with a halogen atom, a C 1 –C 6 alkyl group, a C 1 –C 6 hydroxyalkyl group, a C 2 –C 6 polyhydroxyalkyl group, a C 1 –C 6 alkoxy group, a C 1 –C 6 hydroxyalkoxy group, a nitro group, a hydroxyl group, a group R V R VI N—(CH 2 ) s —, in which R V and R VI independently of one another stand for a hydrogen atom, a C 1 –C 6 alkyl group, a C 1 –C 6 hydroxyalkyl group or an aryl C 1 –C 6 alkyl group, and s stands for a number 0, 1, 2, 3, 4, 5 or 6, Y is an oxygen atom, a sulfur atom or a group NR VII , in which R VII stands for a hydrogen atom, an aryl group, a heteroaryl group, a C 1 –C 6 alkyl group or a C 1 –C 6 arylalkyl group, X − is a halide, benzenesulfonate, p-toluenesulfonate, C 1 –C 4 alkanesulfonate, trifluoromethanesulfonate, perchlorate, 0.5 SO 4 −2 , hydrogen sulfate, tetrafluoroborate, hexafluorophosphate or tetrachlorozincate, and at least one compound with a reactive carbonyl group (component B).