Palladium-Catalyzed Oxidative Annulation Leading to Substituted Pyrrolo[3,2,1-]carbazoles by Sequential C-N and C-C Bond Formation.

A novel regioselective annulation of propargylic alcohols with simple carbazoles for the construction of [3,2,1-]carbazole scaffolds is described to be the first example of intermolecular synthesis of [3,2,1-]carbazoles from simple carbazoles. synthesis of propargyl alcohols from simple, cheap, and easily accessible ketones has also been developed during the one-pot synthesis of [3,2,1-]carbazoles.