1: 9.8 g / pyridine 2: 7.8 g / NaOH/85percent aq. MeOH / 2.5 h / Heating 3: 6.2 g / Jones' reagent / acetone / 0.5 h / 0 - 5 °C 4: 8.7 g / Br2 / CCl4 / 2 h / Ambient temperature 5: 6.1 g / NaOH / H2O / 6 h / Heating 6: 22.5 g / 15percent methanolic HCl / 30 h / Ambient temperature View Scheme

1: 9.8 g / pyridine 2: 7.8 g / NaOH/85percent aq. MeOH / 2.5 h / Heating 3: 6.2 g / Jones' reagent / acetone / 0.5 h / 0 - 5 °C 4: 0.18 g / diethyl ether View Scheme

1: 9.8 g / pyridine 2: 7.8 g / NaOH/85percent aq. MeOH / 2.5 h / Heating 3: 6.2 g / Jones' reagent / acetone / 0.5 h / 0 - 5 °C 4: 8.7 g / Br2 / CCl4 / 2 h / Ambient temperature View Scheme

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

1: 35 percent / t-butyl chromate / CCl4 / 24 h / Heating 2: 3.25 g / aluminium isopropoxide / propan-2-ol / 6 h / Heating 3: 3.2 g / POCl3 / benzene / 2.5 h / Ambient temperature 4: 1.86 g / NaOH / methanol; H2O / 2 h / Heating 5: 1.6 g / Jones' reagent / acetone / 0.17 h / -10 °C 6: 0.96 g / diethyl ether View Scheme

1: 9.8 g / pyridine 2: 7.8 g / NaOH/85percent aq. MeOH / 2.5 h / Heating 3: 6.2 g / Jones' reagent / acetone / 0.5 h / 0 - 5 °C 4: 8.7 g / Br2 / CCl4 / 2 h / Ambient temperature 5: 6.1 g / NaOH / H2O / 6 h / Heating View Scheme