sulfuric acid Heating;

1: 18-crown-6 / acetonitrile / 20 °C 2: KOH / ethanol; H2O / Heating 3: 67 percent / H2SO4 / Heating View Scheme

1: HMPA; thionyl chloride / tetrahydrofuran / 20 °C 2: 18-crown-6 / acetonitrile / 20 °C 3: KOH / ethanol; H2O / Heating 4: 67 percent / H2SO4 / Heating View Scheme

1: 86 percent / H2SO4 / toluene / 7 h / Heating 2: LiAlH4 / diethyl ether / Heating 3: HMPA; thionyl chloride / tetrahydrofuran / 20 °C 4: 18-crown-6 / acetonitrile / 20 °C 5: KOH / ethanol; H2O / Heating 6: 67 percent / H2SO4 / Heating View Scheme

1: 86 percent / NaOH; Ag2O / H2O / 20 - 50 °C 2: 86 percent / H2SO4 / toluene / 7 h / Heating 3: LiAlH4 / diethyl ether / Heating 4: HMPA; thionyl chloride / tetrahydrofuran / 20 °C 5: 18-crown-6 / acetonitrile / 20 °C 6: KOH / ethanol; H2O / Heating 7: 67 percent / H2SO4 / Heating View Scheme

1: POCl3 / 1,2-dichloro-ethane / 17 h / Heating 2: 86 percent / NaOH; Ag2O / H2O / 20 - 50 °C 3: 86 percent / H2SO4 / toluene / 7 h / Heating 4: LiAlH4 / diethyl ether / Heating 5: HMPA; thionyl chloride / tetrahydrofuran / 20 °C 6: 18-crown-6 / acetonitrile / 20 °C 7: KOH / ethanol; H2O / Heating 8: 67 percent / H2SO4 / Heating View Scheme

1.1: AlCl3 / CS2 / 2.5 h / 20 °C 2.1: dimethylformamide / 22 h / 5 °C 3.1: H2SO4 / methanol / 1 h / Heating 3.2: chloranil / benzene / 2 h / Heating 4.1: POCl3 / 1,2-dichloro-ethane / 17 h / Heating 5.1: 86 percent / NaOH; Ag2O / H2O / 20 - 50 °C 6.1: 86 percent / H2SO4 / toluene / 7 h / Heating 7.1: LiAlH4 / diethyl ether / Heating 8.1: HMPA; thionyl chloride / tetrahydrofuran / 20 °C 9.1: 18-crown-6 / acetonitrile / 20 °C 10.1: KOH / ethanol; H2O / Heating 11.1: 67 percent / H2SO4 / Heating View Scheme

1.1: dimethylformamide / 22 h / 5 °C 2.1: H2SO4 / methanol / 1 h / Heating 2.2: chloranil / benzene / 2 h / Heating 3.1: POCl3 / 1,2-dichloro-ethane / 17 h / Heating 4.1: 86 percent / NaOH; Ag2O / H2O / 20 - 50 °C 5.1: 86 percent / H2SO4 / toluene / 7 h / Heating 6.1: LiAlH4 / diethyl ether / Heating 7.1: HMPA; thionyl chloride / tetrahydrofuran / 20 °C 8.1: 18-crown-6 / acetonitrile / 20 °C 9.1: KOH / ethanol; H2O / Heating 10.1: 67 percent / H2SO4 / Heating View Scheme

1: KOH / ethanol; H2O / Heating 2: 67 percent / H2SO4 / Heating View Scheme

1: LiAlH4 / diethyl ether / Heating 2: HMPA; thionyl chloride / tetrahydrofuran / 20 °C 3: 18-crown-6 / acetonitrile / 20 °C 4: KOH / ethanol; H2O / Heating 5: 67 percent / H2SO4 / Heating View Scheme