1: pyridine / benzene / 0.5 h / Ambient temperature 2: benzene / Irradiation View Scheme

1: CH2Cl2 / 0.33 h / 0 °C 2: NH3 / CH2Cl2 / 0.33 h / 0 °C 3: aq. NaHCO3 / CH2Cl2 / 0.17 h / Ambient temperature 4: 1) Hg(TFA)2, 2) NaBH4 / 1) CH2Cl2, room temperature, 20 min, 2) CH3CN, 0 deg C, 30 min 5: 80 percent / aq. HCl / methanol / 24 h / Heating View Scheme

1: pyridine / benzene / 0.5 h / Ambient temperature 2: benzene / Irradiation View Scheme

1: AgCN / benzene / 4 h / Heating 2: 1.) CuI*P(Bu)3; 2.) Et2O*BF3 / 1.) -78 deg C, 30 min, Et2O; 2.) Et2O-THF (4:1) -78 to -40 deg C, 20 h 3: 1N NaOH / aq. ethanol / Heating View Scheme

aluminium trichloride; acetyl chloride 1.) CH2Cl2, 30 min, 2.) CH2Cl2, reflux, 5 h; Yield given. Multistep reaction;