| 摘要 |
The invention relates to the use of specific heterocyclic couplers which are cationic 7-amino-1,2,3,4-tetrahydroquinoline derivatives of formula (I) for dyeing keratin fibres such as the hair: in which formula (I): R1 to R6, CAT+, An−, and Ra to Rb are as defined in the description.; |
| 主权项 |
1. Use of specific heterocyclic couplers which are cationic 7-amino-1,2,3,4-tetrahydroquinoline derivatives of formula (I), for dyeing keratin fibres; compound of formula (I) and also the salts thereof with an organic or inorganic acid or base, the optical or geometric isomers thereof and/or the solvates thereof such as the hydrates: in which formula (I):
R1, R2, R3, R4, R5 and R6, which may be identical or different, represent i) a hydrogen or halogen atom; ii) a linear or branched C1-C6 alkyl radical optionally substituted with one or more hydroxyl groups, preferably with a single hydroxyl group; iii) a carboxyl radical; iv) a (C1-C6)alkoxycarbonyl radical —C(O)—O—R with R representing a linear or branched C1-C6 alkyl radical; or v) an alkylcarbonyloxy radical —O—C(O)—R with R being as defined previously;Ra, Rb and Rc, which may be identical or different, represent a hydrogen or halogen atom or a C1-C6 alkyl radical;L represents a saturated or unsaturated, linear or branched C1-C30, divalent hydrocarbon-based chain, optionally interrupted with one or more divalent groups or combinations thereof chosen from —N(Rd)—, —O—, —S—, —C(O)— and —S(O)2— with Rd chosen from a hydrogen, and a C1-C6 alkyl, hydroxy(C1-C6)alkyl or amino(C1-C6)alkyl radical;CAT+ represents a cationic radical;An− represents one or more anionic counterions, it being understood that there are as many anionic counterion(s), which may be identical or different, as there are cationic charge(s) in order to ensure electroneutrality of the molecule of formula (I). |
