| 摘要 |
Composition (A) for dyeing keratin fibers comprises, in a cosmetic medium, at least one diheteroarylmethane compound (X) in quinoid or reduced form. Composition (A) for dyeing keratin fibers comprises, in a cosmetic medium, at least one diheteroarylmethane compound (X) in quinoid or reduced form, of formulae (I), (Ibis), (II) or (IIbis), or their tautomers or addition salts. A = oxygen, NH or N-(hydroxy)alkyl; HET1 and HET2 = heterocycle, optionally substituted by one or more Z'; R1 to R6 and Z' = halo, NHSO3H, hydroxy, alkyl, alkoxy, alkylthio, amino (optionally substituted by 1 or 2 alkyl, optionally fused to form a ring that may be interrupted by one or more atoms of nitrogen, oxygen or sulfur), heterocycles, nitro, aryl, acyl, alkoxycarbonyl, carboxamido, cyano, carboxy, SO3H, PO3H2 or PO4H2; A' = hydroxy, amino (optionally substituted by 1 or 2, same or different alkyl and/or hydroxyalkyl, optionally forming a ring as above); R = hydrogen, halo, hydroxy, alkoxy or alkylthio.
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