Use of 4-nitro-2,1,3,-benzoxadiazole derivatives as dyes in coloring agents for keratin fibres

   
   

The object of the present invention is the use of 4-nitro-2,1,3-benzoxadiazole derivatives of general formula (I) as dye in colorants for keratin fibers such as, for example, wool, silk, furs or hair and particularly human hair ##STR1## In formula (I) X denotes oxygen, sulfur or NR.sup.a, R.sup.a standing for hydrogen, a (C.sub.1 -C.sub.4)-alkyl group, a monohydroxy-(C.sub.1 -C.sub.4)-alkyl group, a polyhydroxy-(C.sub.2 -C.sub.4)-alkyl group or a mono-(C.sub.1 C.sub.4)-alkoxy-(C.sub.1 -C.sub.4)-alkyl group, R1 and R2 can be equal or different and independently of each other denote hydrogen, a halogen atom, a (C.sub.1 -C.sub.4)-alkyl group, a halogen-substituted (C.sub.1 -C.sub.4)-alkyl group, a (C.sub.1 -C.sub.4)-alkoxy group, a nitro group or an NR.sup.b R.sup.c group, the R.sup.b and R.sup.c groups being equal or different and independently of each other denoting hydrogen, a (C.sub.1 -C.sub.4)-alkyl group, an optionally substituted aromatic carbon ring or a (C.sub.1 -C.sub.4)-alkanecarbonyl group, or R.sup.b and R.sup.c together with the nitrogen atom forming a heterocyclic (C.sub.3 -C.sub.6) group, and Q denotes hydrogen, an aliphatic group, an aromatic isocyclic group or an aromatic heterocyclic group.

O objeto da invenção atual é o uso dos derivatives 4-nitro-2,1,3-benzoxadiazole da fórmula geral (I) como a tintura nos colorants para fibras do keratin como, para o exemplo, lãs, seda, peles ou cabelo e particularmente ## do ## STR1 do cabelo humano na fórmula (I) X denota o oxigênio, o enxôfre ou o NR.sup.a, R.sup.a que está para o hidrogênio, a (C.sub.1 - grupo de C.sub.4)-alkyl, um monohydroxy-(C.sub.1 - grupo de C.sub.4)-alkyl, um polyhydroxy-(C.sub.2 - grupo de C.sub.4)-alkyl ou um mono-(C.sub.1 C.sub.4)-alkoxy-(C.sub.1 - grupo de C.sub.4)-alkyl, R1 e R2 pode ser igual ou diferente e independentemente de se denote o hidrogênio, um átomo do halogênio, a (C.sub.1 - grupo de C.sub.4)-alkyl, halogênio-substituído (C.sub.1 - o grupo de C.sub.4)-alkyl, a (C.sub.1 - grupo de C.sub.4)-alkoxy, um grupo nitro ou um grupo de NR.sup.b R.sup.c, os grupos de R.sup.b e de R.sup.c que são iguais ou diferentes e independentemente de se que denota o hidrogênio, a (C.sub.1 - grupo de C.sub.4)-alkyl, um anel aromatic opcionalmente substituído do carbono ou a (C.sub.1 - o grupo de C.sub.4)-alkanecarbonyl, ou R.sup.b e R.sup.c junto com o átomo do nitrogênio que dá forma (C.sub.3 - C.sub.6) a um grupo heterocyclic, e a Q denotam o hidrogênio, um grupo aliphatic, um grupo isocyclic aromatic ou um grupo heterocyclic aromatic.

 
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