Copper-Catalyzed Synthesis of Multisubstituted Indoles through Tandem Ullmann-Type C–N Formation and Cross-dehydrogenative Coupling Reactions

Multisubstituted indoles were synthesized via a one-pot tandem copper-catalyzed Ullmann-type C–N bond formation/intramolecular cross-dehydrogenative coupling process at 130 °C in DMSO. The methodology allows practical and modular assembly of indoles in good to excellent yields from readily available aryl iodides and enamines