Compounds of the formula ##STR1## wherein R.sub.1 is chloro, bromo, cyano, nitro, alkylsulfonyl, substituted alkylsulfonyl, phenylsulfonyl or substituted phenylsulfonyl,R.sub.2 is hydrogen, chloro or bromo,R.sub.3 is hydrogen, chloro, bromo or acylamino, with the proviso that at least one of R.sub.2 and R.sub.3 is hydrogen,R.sub.4 is hydrogen, alkyl, substituted alkyl, alkoxy or substituted alkoxy,Each of R.sub.5 and R.sub.6 is independently alkyl or substituted alkyl, wherein each substituent of substituted alkyl is independently chloro, bromo, cyano, hydroxy, alkoxy, chloroalkoxy, bromoalkoxy, cyanoalkoxy, formyloxy, alkylcarbonyloxy, substituted alkylcarbonyloxy, benzoyloxy, substituted benzoyloxy, alkoxycarbonyl, substituted alkoxycarbonyl, phenoxycarbonyl, substituted phenoxycarbonyl, alkoxycarbonyloxy, substituted alkoxycarbonyloxy, phenoxycarbonyloxy or substituted phenoxycarbonyloxy,R.sub.7 is alkyl or substituted alkyl,X is --CO--, --CO.sub.2 -- or --SO.sub.2 --, and n is 2, 3 or 4.These compounds are highly suitable for use as disperse dyes. As such they are employed for dyeing high molecular weight synthetic and regenerated organic fibers, either in loose form, as yarn or in the various textile forms. The dyes are of high tinctorial strength, have good affinity, are resistant to sublimation, and give dyeings of notably good light and wet fastness.