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专利名称：Dyestuffs and process for preparing them发明人：FUCHS OTTO,TROSTER HELMUT申请号：US53135966申请日：19660303公开号：US3356687A公开日：19671205
摘要：The invention comprises compounds of the formula wherein R1 and R2 arehydrogen, halogen, alkyl, aryl, alkoxy, carbalkoxy, acyloxy or nitro, and wherein thebenzanthrone nucleus may contain further substituents, for example, halogen atoms oralkyl, aryl, hydroxy, alkoxy or nitro groups. The compounds are prepared by heating adiazonium salt of a compound of the formula in the presence of copper or a copper salt.
申请人：FARBWERKE HOECHST AKTIENGESELLSCHAFT VORMALS MEISTER LUCIUS &BRUNING
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