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

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