Abstract
| - New synthetic pathways to the 5H-pyrido[3‘,4‘:4,5]pyrrolo[2,3-b]quinolines 6, the 6H-pyrido[3‘,4‘:4,5]pyrrolo[2,3-b][1,6]naphthyridines 7, and the 11H-pyrido[4‘,3‘:4,5]pyrrolo[2,3-b]quinolines 8 via thermolysis of the pyridannulated enyne−carbodiimides 14, 19, and 23 were established. These novel heteroaromatic systems are structurallyrelated to ellipticine alkaloids and could serve as DNA-intercalating agents.
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