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

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