N-SUBSTITUTED 4-HYDROXYINDOLE DERIVATIVES AND KERATIN FIBRE DYEING COMPOSITIONS CONTAINING SAME

摘要

A composition for oxidation dyeing keratin fibres, containing at least one N-substituted 4-hydroxyindole derivative as the coupler and at least one oxidation base, is disclosed. Novel N-substituted 4-hydroxyindole derivatives, a synthesis method therefor, the use thereof as couplers for oxidation dyeing keratin fibres in conjunction with at least one oxidation base, and dyeing methods using said derivatives, are also disclosed.