Synthesis of N-Vinylcarbazoles via Dehydrogenative Coupling of N-H Carbazoles with Alkenes under Palladium Catalysis

The synthesis of N-vinylcarbazoles was achieved by the palladium-catalyzed aza-Wacker reaction of N-H carbazoles with styrenes. In this reaction, Markovnikov adducts were exclusively produced. In contrast, the reaction with electron-deficient alkenes such as acrylates and acrylamides gave only anti-Markovnikov adducts.