The present invention refers to compounds of the formula (I)
wherein
R1
is (C1-C4)-alkyl, (C1-C4)-alkyl which is substituted by hydroxy, (C1-C4)-alkoxy, hydroxy-(C1-C4)-alkoxy, CN, -COOR5, -CON(R5)2 or -N(R5)2 or is phenyl;
R2
is hydrogen, methyl or ethyl;
R3
is (C1-C4)-alkylsulfonyl, (C1-C4)-alkylsulfonyl which is substituted by hydroxy, halogen, cyano, (C1-C4)-alkoxy or -N(R5)2 or is -SO2-CH=CH2, -SO2N(R5)2 or -PO(OR5)2;
R4
is hydrogen, (C2-C4)-alkyl which is substituted by hydroxy, (C1-C4)-alkoxy or hydroxy-(C1-C4)-alkoxy;
each of R5, independently is hydrogen, (C1-C4)-alkyl or hydroxy-(C2-C4)-alkyl; whereas R3 is not -NHSO2CH3 if R2 and R4 are both hydrogen and R1 is methyl, as well as hair dye compostions containing them.
本发明涉及以下式(I)的化合物其中R1是(C1-C4)-烷基,被羟基取代的(C1-C4)-烷基,(C1-C4)-
氧烷基,羟基-(C1-C4)-
氧烷基,CN,-COOR5,-CON(R5)2或-N(R5)2或是
苯基;R2是
氢,
甲基或乙基;R3是(C1-C4)-烷基磺酰基,被羟基,卤素,
氰基,(C1-C4)-
氧烷基或-N(R5)2取代的(C1-C4)-烷基磺酰基,或是-SO2-CH=
CH2,-SO2N(R5)2或-PO(OR5)2;R4是
氢,被羟基,(C1-C4)-
氧烷基或羟基-(C1-C4)-
氧烷基取代的(C2-C4)-烷基;R5中的每一个独立地是
氢,(C1-C4)-烷基或羟基-(C2-C4)-烷基;其中如果R2和R4都是
氢且R1是
甲基,则R3不是-NHSO2CH3,以及含有它们的染发组合物。