INDIGO DERIVATIVES

摘要

The invention relates to agents for colouring keratin fibres. Said agents contain at least one derivative of benzo[b]furane-3-one and/or at least one derivative of benzo[b]thiophene-3-one and/or their keto-enol tautomers as a dye starting product, in a cosmetically acceptable medium. The invention also relates to novel derivatives of benzo[b]furane-3-one and benzo[b]thiophene-3-one. Said novel dye starting products produce intensive colorations of keratin fibres with excellent colour fastness.