1: 70 percent / lithium, tert-butanol / tetrahydrofuran / 15 h / Heating 2: 90 percent / 6 N hydrochloric acid / diethyl ether / 12 h / Ambient temperature 3: 65 percent / tetrahydrofuran; hexane / 1.) 0 deg C, 1 h, 2.) reflux, 16 h View Scheme