Palladium catalyzed synthesis of pyrrole indole and phenanthridine fused polycyclic aromatic compounds from ortho dihaloarenes Convenient palladium catalyzed syntheses of polycyclic nitrogen heterocycles from ortho dihaloarenes were developed. First syntheses of pyrrole fused derivatives via domino C C C N coupling of ortho dihaloarenes with imines were accomplished. Employment of ortho dihaloarenes for sequential regioselective Suzuki reaction double C N coupling afforded corresponding indole fused structures. Finally syntheses of previously unexplored phenanthridine fused architectures by regioselective Sonogashira reaction followed by domino or one pot C N coupling hydroamination C H arylation were described.<eng>