Palladium-Catalyzed\nCyclization and Direct Arylation\nof 1‑[2-(2,2-Dibromoethenyl)phenyl]‑1<i>H</i>‑pyrrole with Allenes

A novel\nand efficient palladium-catalyzed highly regioselective\nreaction of 1-[2-(2,2-dibromoethenyl)phenyl]-1<i>H</i>-pyrrole\nwith allenes was realized to synthesize pyrrolo[1,2-<i>a</i>]quinolones. The tandem process involves intermolecular cyclization\nand intramolecular direct arylation, leading to the formation three\nnew C–C bonds and two new rings. Notably, this transformation\nexhibits broad substrate scope and high functional group tolerance.