1: 54.1 percent / AlCl3 / toluene / 20 h / Ambient temperature 2: 90.3 percent / H2SO4 / 48 h / Heating 3: 90.7 percent / LiAlH4 / diethyl ether / 15 h / Heating View Scheme

aluminium trichloride in toluene 20 h; Ambient temperature;