Scheme 1. Evaluation of substrate scope. Reaction conditions: styrene 1 (0.3 mmol), RAE 2 (0.45 mmol, 1.5 equiv.), potassium organotrifluoroborate salt 3 (0.6 mmol, 2 equiv.), Ir(ppy)3 (3 mol%) in MeCN (3.0 mL, 0.1 M), 24 h irradiation with blue LEDs (λmax = 456 nm). a[Ir(dtbbpy)(ppy)2]PF6 (3 mol%) was used instead Ir(ppy)3. bGram scale reaction: styrene 1 (6.2 mmol).
