oxygen; sodium hydrogencarbonate; manganese (II) chloride in methanol; water 0.75 h;

1: sodium bicarbonate, manganous chloride, O2 / methanol; H2O / 0.75 h 2: 71.3 percent / 1) ceric ammonium nitrate / acetone / 2.5 h / 1) -10 degC, 2.5 h, 2) room temperature, ca. 45 min 3: benzene-d6 / 2 h / 5 °C / Irradiation View Scheme