sulfuric acid T=130°C; 2.5 h;

1: 1.) H2SO4, H2O2 (28percent w/v), 2.) NaOH / 1.) 40 deg C, 8 h, 2.) MeOH, water, reflux, 5 h 2: 52.5 g / 5percent methanolic HCl / 48 h / Ambient temperature 3: 38 g / NaIO4 / ethanol; H2O / 1 h / 35 °C 4: 101 g / pyridine / 1.) RT, 24 h, 2.) reflux, 4 h 5: 40 g / 10percent aq. NaOH / 4 h / Heating 6: 55 percent / 60percent H2SO4 / 2.5 h / 130 °C View Scheme

1: 52.5 g / 5percent methanolic HCl / 48 h / Ambient temperature 2: 38 g / NaIO4 / ethanol; H2O / 1 h / 35 °C 3: 101 g / pyridine / 1.) RT, 24 h, 2.) reflux, 4 h 4: 40 g / 10percent aq. NaOH / 4 h / Heating 5: 55 percent / 60percent H2SO4 / 2.5 h / 130 °C View Scheme

1: 38 g / NaIO4 / ethanol; H2O / 1 h / 35 °C 2: 101 g / pyridine / 1.) RT, 24 h, 2.) reflux, 4 h 3: 40 g / 10percent aq. NaOH / 4 h / Heating 4: 55 percent / 60percent H2SO4 / 2.5 h / 130 °C View Scheme

1: 101 g / pyridine / 1.) RT, 24 h, 2.) reflux, 4 h 2: 40 g / 10percent aq. NaOH / 4 h / Heating 3: 55 percent / 60percent H2SO4 / 2.5 h / 130 °C View Scheme

1: 40 g / 10percent aq. NaOH / 4 h / Heating 2: 55 percent / 60percent H2SO4 / 2.5 h / 130 °C View Scheme

1: 70 percent / polyphosphoric acid / 2.5 h / 100 °C 2: 22.5 g / 15percent methanolic HCl / 30 h / Ambient temperature View Scheme

1: 70 percent / polyphosphoric acid / 2.5 h / 100 °C 2: 22.5 g / 15percent methanolic HCl / 30 h / Ambient temperature 3: 9.62 g / NaBH4 / methanol / 2 h / Ambient temperature 4: 9.8 g / pyridine 5: 7.8 g / NaOH/85percent aq. MeOH / 2.5 h / Heating 6: 6.2 g / Jones' reagent / acetone / 0.5 h / 0 - 5 °C 7: 0.18 g / diethyl ether View Scheme

1: 70 percent / polyphosphoric acid / 2.5 h / 100 °C 2: 22.5 g / 15percent methanolic HCl / 30 h / Ambient temperature 3: 9.62 g / NaBH4 / methanol / 2 h / Ambient temperature 4: 35 percent / t-butyl chromate / CCl4 / 24 h / Heating 5: 3.25 g / aluminium isopropoxide / propan-2-ol / 6 h / Heating 6: 3.2 g / POCl3 / benzene / 2.5 h / Ambient temperature 7: 1.86 g / NaOH / methanol; H2O / 2 h / Heating 8: 1.6 g / Jones' reagent / acetone / 0.17 h / -10 °C 9: 0.96 g / diethyl ether 10: 0.28 g / AcOH-water-THF (60:25:15) / 8 h / Ambient temperature View Scheme

1: 70 percent / polyphosphoric acid / 2.5 h / 100 °C 2: 22.5 g / 15percent methanolic HCl / 30 h / Ambient temperature 3: 9.62 g / NaBH4 / methanol / 2 h / Ambient temperature 4: 35 percent / t-butyl chromate / CCl4 / 24 h / Heating 5: 3.25 g / aluminium isopropoxide / propan-2-ol / 6 h / Heating 6: 3.2 g / POCl3 / benzene / 2.5 h / Ambient temperature 7: 1.86 g / NaOH / methanol; H2O / 2 h / Heating 8: 1.6 g / Jones' reagent / acetone / 0.17 h / -10 °C 9: 0.96 g / diethyl ether View Scheme