[EN] The invention relates to the use of compounds of formula (I) in which one of the groups R<1> or R<2> is a nitro group while the second is hydrogen, a halogen, an amino group, a mono or dialkylamino group wtih 1 to 4 carbon atoms, an alkyl or alkoxy group with 1 to 4 carbon atoms, R<3> and R<4> are independently hydrogen or an alkyl group with 1 to 4 carbon atoms, A is a >CHR<6> or a >C=O group, R<6> is hydrogen or an alkyl group with 1 to 4 carbon atoms, and R<5> is hydrogen or an alkyl group with 1 to 4 carbon atoms, and their salts as direct colouring agents in hair dyes. [FR] On utilise comme colorants à action directe dans des teintures pour cheveux des composés ayant la formule (I), ou leurs sels, dans laquelle un des groupes R1 ou R2 est un groupe nitro, alors que l'autre groupe est hydrogène, halogène, un groupe amine, un groupe monoalkylamine ou dialkylamine avec des groupes alkyle ayant entre 1 et 4 atomes de carbone, R3 et R4 sont indépendamment l'un de l'autre de l'hydrogène ou un groupe alkyle ayant entre 1 et 4 atomes de carbone, A est un groupe >CHR6 ou >C=O-, R6 étant de l'hydrogène ou un groupe alkyle ayant entre 1 et 4 atomes de carbone, et R5 est de l'hydrogène ou un groupe alkyle ayant entre 1 et 4 atomes de carbone.
Hair dye compositions and certain 1,2,3,4-tetrahydronitroquinoxalines
申请人:Henkel Kommanditgesellschaft auf Aktien
公开号:US05089025A1
公开(公告)日:1992-02-18
The invention relates to the use of compounds corresponding to formula (I) ##STR1## in which one of the substituents R.sup.1 or R.sup.2 is a nitro group while the other is hydrogen, halogen, an amino group, a mono- or dialkylamino group containing C.sub.1-4 alkyl groups, a C.sub.1-4 alkyl or alkoxy group, R.sup.3 and R.sup.4 independently of one another represent hydrogen or a C.sub.1-4 alkyl group, A is a >CHR.sup.6 - or a >C.dbd.O- group, where R.sup.6 is hydrogen or a C.sub.1-4 alkyl group, and R.sup.5 is hydrogen or a C.sub.1-4 alkyl group, or salts thereof as substantive dyes in hair-dyeing compositions. When the substituent groups in formula I represent one of the combinations I-IV shown in the table below, the compounds are novel and are useful in hair-dyeing compositions. ______________________________________ R.sup.1 R.sup.2 R.sup.3 R.sup.4 R.sup.5 A ______________________________________ I: H NO.sub.2 H CH.sub.3 H CH.sub.2 II: H NO.sub.2 CH.sub.3 CH.sub.3 H CH.sub.2 III: NH.sub.2 NO.sub.2 H H H CH.sub.2 IV: H NO.sub.2 H H CH.sub.3 CH.sub.2. ______________________________________