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Abstract Experimental facts on the mechanism of the direct oxidative photocatalytic C H/C H coupling of azines with (hetero)aromatic nucleophiles, proceeding in the presence of TiO2 as a photocatalyst, have… Click to show full abstract
Abstract Experimental facts on the mechanism of the direct oxidative photocatalytic C H/C H coupling of azines with (hetero)aromatic nucleophiles, proceeding in the presence of TiO2 as a photocatalyst, have been obtained by using EPR spectroscopy and 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), N-(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl)-2-methylpropanamide (TMT-H), as spin trap reagent and spin probe, respectively. The formation of the superoxide radical anion (O2 −) and N-centered radicals has been detected for the first time for the SNH transformations.
Journal Title: Journal of Photochemistry and Photobiology A: Chemistry
Year Published: 2019
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