Assembly of Diverse [60]Fullerene-Fused Tricyclic Scaffolds via a Palladium-Catalyzed Cascade [2+2+2] Annulation Reaction

Herein, a concise and robust approach for the highly efficient assembly of [60]fullerene-fused tricyclic scaffolds has been developed through a palladium-catalyzed cascade [2 + 2 + 2] annulation process. Diverse tricyclic scaffolds incorporating various ring sizes (6-19 membered) and types (carbocycles and N- and O- heterocycles) can be expediently constructed in a single-step trans-formation.