A Domino Palladium-Catalyzed Cyclization: One-Pot Synthesis of 4b-Alkyl-10-phenyl-4b,5-dihydroindeno[2,1‑<i>a</i>]indenes via Carbopalladation Followed by C–H Activation

An effective domino one-pot [Pd]-catalysis for the construction of novel tetracyclic compounds was described. This process involved in the construction of three C–C bonds from simple and readily available 1-bromo-2-isopropenylbenzenes and internal alkynes. A variety of fused tetracyclic dihydroindeno-indenes were accomplished