1: 95 percent / diethyl ether / 0.67 h / 0 °C 2: 90 percent / LiAlH4 / diethyl ether / 51 h / Heating 3: m-chloroperbenzoic acid / CHCl3 4: 5 percent / 85 - 105 °C / 0.5 Torr View Scheme

1: triethylamine / diethyl ether / 0.83 h / Heating 2: 29 percent / diethyl ether / Heating 3: 73 percent / KOH / aq. ethanol / 13 h / 25 °C View Scheme

oxalyl dichloride in benzene 1.) 5 deg C 2.) 25 deg C, 4 h;