Efficient Synthesis of 5H-Cyclopenta[c]quinoline Derivatives via Palladium-Catalyzed Domino Reactions of o-Alkynylhalobenzene with Amine

A novel and efficient route for the synthesis of 5H-cyclopenta[c]quinoline derivatives via a palladium-catalyzed domino reaction of o-alkynylhalobenzene with amine is described. The starting materials are easily available, and the reaction proceeds smoothly with high efficiency, which shows broad scope with good functional group tolerance.