Abstract
An efficient and operationally simple photochemical method has been demonstrated under transition metal-free, photocatalyst-free, and oxidant-free conditions. In recent times, diaryliodonium salts have become one of the most popular arylating sources under photoinduced conditions. Herein, we developed a visible light induced arylation of heterocycles using an EDA complex that is formed in situ from 2,6-lutidine and diaryliodonium triflate. Under light irradiation, the EDA complex generates the aryl radical that undergoes addition with 2-oxo-2H-chromene-3-carbonitriles via an SET process. This method serves as an effective tool to access biologically active and pharmaceutically relevant coumarin scaffolds.
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