1: 1.) methanol, HCl (gas) / 1.) room temperature, overnight, 2.) 90 deg C, 24 h 2: 66 percent / pyridine / 48 h / -15 °C 3: LiAlH4 / tetrahydrofuran / 1.) 0 deg C, 2.) reflux, 1 h 4: diethyl ether View Scheme