1: 86 percent / ethanol; H2O / 0.75 h / Heating 2: 91 percent / sulfuric acid / H2O / 4 h / Heating 3: 84 percent / LiAlH4 / diethyl ether / 1 h / Heating 4: 72 percent / 48percent HBr, H2SO4 / 3 h / Heating 5: 63 percent / NaOEt / 7 h / Heating 6: 98 percent / KOH / ethanol; H2O / 6 h / Heating 7: 95 percent / 170 °C 8: thionyl chloride / 0.75 h / Heating 9: 85 percent / AlCl3 / CS2 / 3 h / Heating 10: 89 percent / NaBH4 / ethanol; tetrahydrofuran 11: 96 percent / p-toluenesulfonic acid / benzene / Heating View Scheme

1: 98 percent / NiCl2<dppp>2 / diethyl ether / Heating 2: 99 percent / H2 / PtO2 / tetrahydrofuran / 1034.3 Torr View Scheme

1: 98 percent / NiCl2<dppp>2 / diethyl ether / Heating 2: 97 percent / H2 / PtO2 / tetrahydrofuran / 1034.3 Torr View Scheme

1: 97 percent / NiCl2<dppp>2 / diethyl ether / Heating 2: 98 percent / H2 / PtO2 / tetrahydrofuran / 1034.3 Torr View Scheme