A compound, or a salt thereof, represented by the following formula, ##STR1## wherein A is a substituted or unsubstituted phenylene or naphthylene group, B is ##STR2## in which R.sub.3 is a hydrogen atom or a lower alkyl, lower alkoxy, acylamino or ureido group, and R.sub.4 is a hydrogen atom or a lower alkyl or lower alkoxy group, R.sub.1 and R.sub.3 are independently a hydrogen atom or a substituted or unsubstituted lower alkyl group, X is a substituted or unsubstituted amino, lower alkoxy, substituted phenoxy or sulfo group, Y is --SO.sub.2 CH.dbd.CH.sub.2 or --SO.sub.2 CH.sub.2 CH.sub.2 Z, in which Z is a group capable of being split by the action of an alkali, and m is 2 or 3, which is useful for dyeing hydroxyl group- or amide group-containing fiber materials to give dyed products of a brown color having excellent fastness properties with good build-up property.
以下式子所表示的化合物或其盐,其中A是取代或未取代的苯基或
萘基,B是##STR2##其中R.sub.3是氢原子或较低的烷基、烷氧基、酰胺基或
脲基,R.sub.4是氢原子或较低的烷基或烷氧基,R.sub.1和R.sub.3是独立的氢原子或取代或未取代的较低烷基基团,X是取代或未取代的
氨基、较低烷氧基、取代的苯氧基或
磺酸基,Y是--SO.sub.2 CH.dbd.CH.sub.2或--SO.sub.2 CH.sub.2 CH.sub.2 Z,其中Z是能被碱作用分裂的基团,m为2或3。该化合物对含有羟基或酰胺基的纤维材料进行染色,可获得具有良好建立性和优异牢度性能的棕色染色产品。