Cationic dyes comprising a 2-oxo-tetrahydrothiophen-3-ylamino substituent for dyeing keratin-containing fibres

摘要

Dyes of formula (1): ```wherein D is a cationic radical consisting or comprising an anthraquinone, acridine, azo, azomethine, hydrazomethine, benzodifuranone, coumarine, diketopyrrolopyrrole, dioxazine, diphenylmethane, formazan, indigoid, indophenol, naphthalimide, naphthaquinone, nitroaryl, merocyanine, methine, oxazine, perinone, perylene, pyrenequinone, phthalocyanine, phenazine, quinoneimine, quinacridone, quinophthalone, stilbene, styryl, triphenylmethane, xanthene, thiazine, thioxanthene or direct dye; may be used for dyeing keratin-containing fibres.