oxygen; methylene blue in methanol; chloroform 0.25 h; Ambient temperatureIrradiation;

1: K2CO3 / acetone / 0.5 h / Heating 2: 92 percent / O2 / methylene blue / CHCl3; methanol / 0.25 h / Ambient temperature; Irradiation View Scheme

1: 85 percent / neat (no solvent) / 12 h / 170 °C 2: K2CO3 / acetone / 0.5 h / Heating 3: 92 percent / O2 / methylene blue / CHCl3; methanol / 0.25 h / Ambient temperature; Irradiation View Scheme