Rhodium-Catalyzed Direct Bis-cyanation of Arylimidazo[1,2-α]pyridine via Double C–H Activation

An
efficient Cp*Rh­(III)-catalyzed selective bis-cyanation of aryl­imidazo­[1,2-α]­pyridines
with N-cyano-N-phenyl-p-methyl­benzene­sulfonamide via N-directed ortho double C–H activation has been developed. The
reaction proceeds with broad functional group tolerance to furnish
various cyanated imidazo­pyridines in high yields. The current
methodology exhibits unique characteristics, including high bis-cyanation
selectivity, operational convenience, and gram-scale production.