| 摘要 |
The invention relates to the use of 4-nitro-benzo-2,1,3-oxadiazol derivatives of general formula (I) as dyes in colouring agents for keratin fibres, for example, wool, silk, fur or hair and particularly human hair. In formula (I) X represents oxygen, sulphur or NR<a>, R<a> represents hydrogen, an (C1-C4) alkyl group, a monohydroxy (C1-C4) alkyl group, a polyhydroxy (C2-C4) alkyl group, a mono (C1-C4) alkoxy (C1-C4) alkyl group; R1 and R2 can be identical or different and represent independently from each other hydrogen, a halogen atom, an (C1-C4) alkyl group, an (C1-C4) alkyl group substituted by a halogen atom, an (C1-C4) alkoxy group, a nitro group or a NR<b>R<c> group, wherein the radicals R<b> and R<c> can be identical or different and represent independently from each other hydrogen, a (C1-C4) alkyl group, an optionally substituted aromatic carbocycle or an (C1-C4) alkane carbonyl group, or R<b> and R<c> together with the nitrogen atom form a heterocyclic (C3-C6) group; Q represents hydrogen, an aliphatic group, an aromatic isocyclic group or an aromatic heterocyclic group.
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