Rhodium-catalyzed multiple C-H activation/highlymeta-selective C-H amination between amidines and alkynes

摘要

A tandem process of multiple C-H activation and intermolecular highlymeta-selective C-H amination between amidines and alkynes has been developed. Mechanistic studies demonstrate that the reaction is proposed to proceed through two different Rh(i)-Rh(iii) catalytic cycles, whereinRhodium-complex IandRhodacycle intermediate IIwere isolated for the first time.