Quaternary Carbon Center Forming [3+2] Cyclization Reaction through Adjusting the Substituents of Substrates

Herein, we describe a variety of chiral hybrid pyrroidine–indole polycyclic derivatives with quaternary and continuous chiral centers were synthesized in good yields with excellent stereoselectivities through an asymmetric, intermolecular, and formal [3 + 2] cyclization reaction catalyzed by a bifunctional catalyst. In addition, the selection of substituents of substrates is the key to success, and both the hydroxyl group and the trifluoromethyl group play essential roles in the reaction.