Synthesis of Indoles Using Visible Light: Photoredox Catalysis for Palladium-Catalyzed C-H Activation

A combined palladium- and photoredox-catalyzed C-H olefination enables the synthesis of indoles. By using visible light, the direct C-H activation of aromatic enamines can be achieved and a variety of indole derivatives can be obtained in good yields under mild reaction conditions.