Rh-Catalyzed regioselective C–H activation and C–C bond formation: synthesis and photophysical studies of indazolo[2,3-a]quinolines

Abstract

Rh(III)-Catalyzed regioselective C–H functionalization of 2-aryl-2H-indazoles with alkynes is reported to furnish indazoloquinolines utilizing Cu(OAc)₂·H₂O as an oxidant, which facilitates the reductive elimination step. Kinetic isotope studies suggest that C–H activation is presumably the product determining step. The products display a strong blue emission with high quantum yields.