1.1: lithium diisopropylamide / tetrahydrofuran / 0.08 h / -78 °C 1.2: trimethylchlorosilane / tetrahydrofuran / 3 h / Heating 1.3: methanol / 0.17 h / 20 °C 2.1: 97 percent / diethyl ether 3.1: 91 percent / DIBAL-H / toluene / 1 h / 20 °C 4.1: 90 percent / pyridine 5.1: 84 percent / dimethylsulfoxide / 2 h / 80 °C 6.1: 79 percent / 20percent KOH / bis-(2-hydroxy-ethyl) ether / 1 h / Heating 7.1: 97 percent / diethyl ether 8.1: 80 percent / DIBAL-H / toluene / 1 h / 20 °C 9.1: 98 percent / pyridine 10.1: 69 percent / ozone; triphenylphosphane / CH2Cl2; methanol 11.1: hydroxylamine hydrochloride; sodium acetate / ethanol 12.1: 1.19 g / sodium acetate / acetic anhydride / Heating 13.1: potassium hydroxide / methanol / 2 h / Heating 14.1: 95 percent / triphenylphosphane / CCl4 / 2 h / Heating 15.1: 91 percent / 1 h / 130 °C View Scheme

1.1: lithium diisopropylamide / tetrahydrofuran / 0.08 h / -78 °C 1.2: trimethylchlorosilane / tetrahydrofuran / 3 h / Heating 1.3: methanol / 0.17 h / 20 °C 2.1: 97 percent / diethyl ether 3.1: 91 percent / DIBAL-H / toluene / 1 h / 20 °C 4.1: 90 percent / pyridine 5.1: 84 percent / dimethylsulfoxide / 2 h / 80 °C 6.1: 79 percent / 20percent KOH / bis-(2-hydroxy-ethyl) ether / 1 h / Heating 7.1: 97 percent / diethyl ether 8.1: 80 percent / DIBAL-H / toluene / 1 h / 20 °C 9.1: 98 percent / pyridine 10.1: 69 percent / ozone; triphenylphosphane / CH2Cl2; methanol 11.1: hydroxylamine hydrochloride; sodium acetate / ethanol 12.1: 1.19 g / sodium acetate / acetic anhydride / Heating 13.1: potassium hydroxide / methanol / 2 h / Heating 14.1: 96 percent / triphenylphosphane / CCl4 / 2 h / Heating 15.1: 92 percent / 1 h / 130 °C View Scheme