1: 10percent aq. NaOH / 2 h / Heating 2: SOCl2, DMF / toluene / 2.5 h / 55 - 60 °C 3: NaN3 / acetone; H2O / 0.17 h / 0 °C 4: toluene / 0.5 h / Heating 5: AlCl3 / tetrachloroethene / 3 h / 70 - 75 °C 6: 1M BH3 / tetrahydrofuran / 18 h / Heating View Scheme

sodium hydroxide 2 h; Heating; Yield given;