The subject of the invention is novel pyrazolo[3,2-c]-1,2,4-triazoles of formula (I) which are useful for the oxidation dyeing of keratinous fibers, in particular human hair, the compositions containing these compounds and the dyeing method using them.
1
in which
R1 represents a hydroxyl group or a C1-C4 alkyl group substituted with at least one hydroxyl radical, and
R2 represents an aryl group which may be substituted with at least one radical chosen from the group consisting of halogen, nitro, cyano, alkyl, hydroxyl, alkoxy, amino, alkylamino, dialkylamino, acylamino, sulfonamido, alkylthio, alkoxycarbonyl, carboxy and sulfo radicals.
本发明的主题是可用于角质纤维(尤其是人类头发)氧化染色的新型式(I)
吡唑并lsqb;3,2-c并rsqb;-
1,2,4-三唑、含有这些化合物的组合物以及使用它们的染色方法。
1
其中
R1 代表羟基或被至少一个羟基取代的 C1-C4 烷基,以及
R2 代表芳基,可被至少一个选自卤素、硝基、
氰基、烷基、羟基、烷氧基、
氨基、烷基
氨基、二烷基
氨基、酰
氨基、磺酰
氨基、烷
硫基、烷氧羰基、羧基和磺基的基团取代。