| 摘要 |
Dyes of the formula <IMAGE> in which F is the radical of an indigoid dye, of a benzothioxanthene or of an aromatic dye which contains at least 4 alicyclic and/or heterocyclic, fused six-membered rings and at least two ring keto groups and is not water-soluble, R1 is a substituted or unsubstituted C1-4-alkyl radical, a substituted or unsubstituted cycloalkyl radical, a substituted or unsubstituted aryl radical or a radical of the formula -A-Q where A is a substituted or unsubstituted C1-4-alkylene radical and Q is a basic radical, which may be quaternised, and R2 is hydrogen or a substituted or unsubstituted C1-4-alkyl radical, or in which R1 and R2 together with the <IMAGE> group are a phthalimide radical, and R3 is hydrogen, a substituted or unsubstituted C1-4-alkyl radical, a substituted or unsubstituted aryl radical, a C1-4-alkoxycarbonyl radical or a N,N-di-C1-4-alkylcarboxamide radical and n is 1, 2, 3 or 4. The novel dyes are suitable as vat dyes for dyeing natural or regenerated cellulose and as cationic dyes for dyeing paper.
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