Monoazo pigments and process for their production

Abstract From the Canadian patent

Monoazo pigments of the formula wherein, A represents an aromatic radical in particular 2 benzene, radical, containing a 5- or 6-membered heterocyclic ring which contains a cyclically bonded -CONH-group. Z represents a -CO-or -SO2-group R represents an aromatic radical. for example a naphthyl radical, but especially a phenyl radical a chloroalkyl, group or an alkoxyethyl group X represents a hydrogen or halogen atom an alkyl, alkoxy. alkoxycarbonyl, aryloxycarbonyl. azyloxy or nitro group Q represents a hydrogen atom, a bromine atom or an alkyl group, for colouring high molecular organic materials in orange to brown shades having especially good fastness properties.