1: 99 percent / O2, methylene blue / methanol / 3 h / 0 °C / Irradiation 2: NaBH4, NaHCO3 / H2O / 2 h / Ambient temperature 3: p-TsOH / benzene / Heating 4: 90 percent / H2, quinoline / 5percent Pd/BaSO4 / benzene View Scheme

1: 99 percent / O2, methylene blue / methanol / 3 h / 0 °C / Irradiation 2: NaBH4, NaHCO3 / H2O / 2 h / Ambient temperature 3: p-TsOH / benzene / Heating View Scheme