1: 92 percent / pyridine 2: 85 percent / dimethylsulfoxide / 2 h / 80 °C 3: 81 percent / 20percent KOH / bis-(2-hydroxy-ethyl) ether / 1 h / Heating 4: 98 percent / diethyl ether 5: 84 percent / DIBAL-H / toluene / 1 h / 20 °C 6: 98 percent / pyridine 7: 68 percent / ozone; triphenylphosphane / CH2Cl2; methanol 8: hydroxylamine hydrochloride; sodium acetate / ethanol 9: 1.52 g / sodium acetate / acetic anhydride / Heating 10: potassium hydroxide / methanol / 2 h / Heating 11: 95 percent / triphenylphosphane / CCl4 / 2 h / Heating 12: 91 percent / 1 h / 130 °C View Scheme

1: 92 percent / pyridine 2: 85 percent / dimethylsulfoxide / 2 h / 80 °C 3: 81 percent / 20percent KOH / bis-(2-hydroxy-ethyl) ether / 1 h / Heating 4: 98 percent / diethyl ether 5: 84 percent / DIBAL-H / toluene / 1 h / 20 °C 6: 98 percent / pyridine 7: 68 percent / ozone; triphenylphosphane / CH2Cl2; methanol 8: hydroxylamine hydrochloride; sodium acetate / ethanol 9: 1.52 g / sodium acetate / acetic anhydride / Heating 10: potassium hydroxide / methanol / 2 h / Heating 11: 96 percent / triphenylphosphane / CCl4 / 2 h / Heating 12: 92 percent / 1 h / 130 °C View Scheme