| 摘要 |
Hydrazone dyestuffs of the formula <IMAGE> I <IMAGE> in which R denotes optionally substituted alkyl, R1 denotes alkyl and the two radicals can form a closed ring, R2 denotes optionally substituted alkyl, R3 denotes alkyl, alkoxy or halogen, R4 denotes alkyl, halogen, alkoxy, phenoxy, benzyloxy, benzyl, carboxyl, alkyl carboxylate, carboxamide, sulphonamide, alkylsulphonyl, phenylsulphonyl, cyano, nitro, trifluoromethyl, acetyl or benzoyl, B denotes <IMAGE> +TR <IMAGE> D denotes alkylene, phenylene or naphthylene, E denotes halogen, hydroxyl, alkoxy or <IMAGE> Z and Z1 denote hydrogen or -Y-Z2, Y denotes alkylene, Z2 denotes hydrogen, hydroxyl, pyridinium, <IMAGE> Z3, Z4 and Z5 denote hydrogen or optionally substituted alkyl, Z3 also denotes phenyl, benzyl or <IMAGE> Y1 denotes alkylene and s denotes 1-8, or Z and Z1 as well as Z3 and Z4 form a closed ring, G denotes alkylene, phenylene or G denotes alkylene, phenylene or <IMAGE> m and n denote 0, 1 or 2 and X(-) denotes an anion, are used in particular for dyeing paper.
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