1: 90 percent / sodium hydride / tetrahydrofuran / 1.) 0 deg C, 2.) 23 deg C, 24 hr 2: 100 percent / 1 N hydrochloric acid / tetrahydrofuran / 0.25 h / 23 °C 3: 95 percent / anhydrous potassium carbonate / methanol / 0.25 h / 23 °C View Scheme