Visible-Light-Promoted C2 Selective Arylation of Quinoline and Pyridine -Oxides with Diaryliodonium Tetrafluoroborate.

A protocol of visible-light-promoted C2 selective arylation of quinoline and pyridine -oxides, with diaryliodonium tetrafluoroborate as an arylation reagent, using eosin Y as a photocatalyst for the construction of -heterobiaryls was presented. This methodology provided an efficient way for the synthesis of 2-aryl-substituted quinoline and pyridine -oxides. This strategy has the following advantages: specific regioselectivity, simple operation, good functional group tolerance, and high to moderate yields under mild conditions.