1.1: 93 percent / KOH / methanol 2.1: propionic acid / 140 °C 2.2: 85 percent / NaOH / ethanol / Heating 3.1: 72 percent / LiAlH4 / tetrahydrofuran 4.1: p-TsCl; pyridine 4.2: 67 percent / LiAlH4 / tetrahydrofuran / Heating 5.1: O3 / methanol; CH2Cl2 / -78 °C 5.2: 79 percent / NaBH4 / methanol; CH2Cl2 / -78 °C 6.1: p-TsCl; pyridine 6.2: NaN3 / aq. ethanol / 10 h / Heating 7.1: LiAlH4 / diethyl ether / Heating View Scheme