| 摘要 |
<p>New water-soluble monoazo compounds had been found which, in the form of the free acid, correspond to the formula <IMAGE> in which A represents a phenyl radical of the formula <IMAGE> or <IMAGE> in which THE SUBSTITUENTS R1 are the same or different and each is hydrogen, chlorine, lower alkyl or alkoxy, R2 is hydrogen, halogen, a sulfo group, a sulfonamide or a lower alkoxy group, R is hydrogen or lower alkyl, R' is hydrogen, a lower alkyl group or an optionally substituted phenyl group, and X is a vinyl group or a radical of the formula -CH2-CH2-Z wherein Z is an inorganic or organic radical capable of being split off by an alkaline agent. These compounds can be prepared by coupling of the corresponding phenyl diazo compounds with the corresponding aminonaphthalene coupling compounds in an acid to neutral medium. The novel compounds can be utilized as very valuable dyestuffs, especially as fibre-reactive dyestuffs, for the dyeing of, for example, wool, silk, leather, polyurethane and polyamide fibres and of regenerated or native cellulose and yield dyeings and prints of excellent color build-up and tinctorial strength which are distinguished by several very good fastness properties.</p> |
