A compound having the formula (I): ##STR1## wherein D is a radical of a heterocyclic or aromatic component selected from the group of aniline, anthraquinone, phthalimide or aminobenzene radicals, wherein the radical is unsubstituted or is substituted by fluorine, chlorine, bromine, nitro, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, trifluoromethyl, cyano, C.sub.1 -C.sub.4 -alkylsulfonyl, carboxylic acid ester groups, carbamyl, sulfamyl, 1,3,4- or 1,2,4-oxadiazolyl or acylamino groups; X is CO-- or --SO.sub.2 --; and R is an aliphatic, aromatic or heterocyclic radical selected from the group of C.sub.1 -C.sub.20 alkyl which is unsubstituted or is substituted by chlorine, bromine, cyano or dialkylamino groups; or phenyl or methyl groups unsubstituted or substituted by fluorine, bromine, methyl, ethyl, methoxy, ethoxy, cyano, carbamyl, sulfamyl or acylamino groups; or amino group; or a radical of the formula: ##STR2## wherein ring a is unsubstituted or is substituted by nitro, fluro, bromine or methoxy groups; and ring b is unsubstituted or is substituted by chlorine, bromine or nitro groups.The majority of the compounds of the formula (I) have yellow hues and are used as pigments in printing inks and finishes, and as disperse dyes for synthetic fibers.