Fig. 2: Development of 1,2-diheteroarylation of alkenes via photoredox catalysis.
From: Visible light-induced chemoselective 1,2-diheteroarylation of alkenes
a Effect of Brønsted acid additives on model reaction. b Systematic evaluation of various photocatalysts. c UV-vis absorption spectroscopy. d Stern-Volmer quenching studies. e Evaluation of other reaction parameters. aPredicted pKa value. MCAA chloroacetic acid. bReaction conditions: 1a (0.20 mmol), 2a (0.50 mmol), 3a (0.10 mmol), PC [Ir-I] (2.0 mol%), AcOH (0.10 mmol), TFE (2.0 mL), blue LEDs (λmax = 456 nm), room temperature, N2 atmosphere, 20 h, yields were determined by GC-FID analysis of the crude reaction mixture using 1,3,5-trimethoxybenzene as internal standard. cYields were calculated based on 1a.
