Rh(III)-Catalyzed Oxidative C-2 Coupling of -Pyridinylindoles with Benzo[]thiophene 1,1-Dioxides via C-H Bond Activation.

An efficient Rh(III)-catalyzed cross-dehydrogenative coupling of -pyridinylindoles with benzo[]thiophene 1,1-dioxides has been developed through directing-group-assisted C-H activation. This transformation constructs a new C-C bond from two inert C-H bonds in a one-pot reaction. The present reaction is compatible with various functional groups with respect to indoles and benzothiophene[] 1,1-dioxides. Furthermore, the emission properties of synthesized compounds have been explored.