Patent ID: 6749645
Filing Date: 2004-06-15
Classification: A61K,A61Q

Abstract:
Cosmetic preparation for dyeing keratin fibers, said cosmetic preparation containing at least one 4-nitro-2,1,3-benzoxadiazole derivative of formula (I). whereinX denotes oxygen, sulfur or NRa, Ra standing for hydrogen, a(C1-C)-alkyl group, a monohydroxy-(C1-C4)-alkyl group, a polyhydroxy-(C2-C4)-alkyl group or a mono-(C1-C4-alkoxy-(C1-C4)-alkyl group, R1 and R2 can be equal or different and, independently of each other, denote hydrogen, a halogen atom, a (C1-C4)-alkyl group, a halogen-substituted (C1-C4)-alkyl group, a (C1-C4)-alkoxy group, a nitro group or an NRbRc group, the Rb and Rc groups being equal or different and, independent of each other, denoting hydrogen, a (C1-C4)-alkyl group, an optionally substituted aromatic carbon ring or a (C1-C4)-alkane carbonyl group, or Rb and Rc together with a nitrogen atom forming a heterocyclic (C3-C8) group; and Q denotes hydrogen, an aliphatic group, an aromatic isocyclic group or an aromatic heterocyclic group; with the proviso that, if R1, R2 and Q each denote hydrogen, then X is not oxygen.