2-DICHLOROMETHYL-NAPHTHIMIDAZOLE QUINONES .4. HETEROCYCLIC 1,4-NAPHTHOQUINONE DERIVATIVES

rylamino-3-dichloroacetylamino-1,4-naphthoquinones 4 show in ethanolic hydrochloric acid the same reactivity as the corresponding 3-monochlo roacetylamino-1,4-naphthoquinone 3. After cyclisation from 4 to 6, 6 d ehydrates to give ro-1-phenyl-1H-naphth-[2,3-d-]imidazole-4,9-diones 8 . Elimination of dichloromethane from 6 to 9 is not observed. The reac tion of 4c in alkaline DMSO solution indicates, that ring closure to 3 -hydroxy-benzo[g]quinoxalinetriones 2 is possible. The microbiological activity from 7 and 8 has been proved.