1: 2 percent / 60percent sodium hydride in mineral oil / tetrahydrofuran / 4 h 2: 70 percent / H2 / Raney nickel / ethanol / 2 h 3: 54 percent / 15M KOH / aq. ethanol / 144 h / 90 °C 4: 74 percent / lithium aluminum hydride / tetrahydrofuran / 5 h / Heating 5: 72 percent / cyclohexene / 20percent Pd(OH)2/C / ethanol / 44 h / Heating View Scheme