1: 71 percent / diethyl ether / 1.) -70 deg C -> 0 deg C, 1 h, 2.) 23 deg C, 1 h 2: 25 percent / conc. sulfuric acid, acetic anhydride / acetic acid / 2.25 h / 23 °C View Scheme

1: 71 percent / diethyl ether / 1.) -70 deg C -> 0 deg C, 1 h, 2.) 23 deg C, 1 h 2: 53 percent / conc. sulfuric acid, acetic anhydride / acetic acid / 2.25 h / 23 °C View Scheme

1: lithium aluminum hydride / diethyl ether / 23 h / Ambient temperature 2: 29 percent / conc. sulfuric acid / acetic acid / 96 h / 23 °C View Scheme

1: lithium aluminum hydride / diethyl ether / 23 h / Ambient temperature 2: 27 percent / conc. sulfuric acid / acetic acid / 96 h / 23 °C 3: 37 percent / CrO3 / acetic acid / 3 h / Heating View Scheme