1: 44.5 percent / conc.HCl / methanol / 0.17 h / 100 °C 2: 39.4 percent / aq.KOH / methanol / 3 h / Ambient temperature 3: 1.) LiAlH4, 2.) DDQ / 1.) benzene, ether, reflux, 30 min, 2.) dioxane, room temperature, 40 h 4: 81.3 percent / pyridine / 18.5 h 5: 83.8 percent / pyridinium chlorochromate / CH2Cl2 / 2 h 6: 10 percent / trimethyl orthoformate, O2, toluene-p-sulphonic acid / dioxane 7: 39.8 percent / ethanol / 2.5 h / Irradiation 8: 75 percent / H2 / Pd-CaCO3 / pyridine 9: 28.5 mg / potassium hydrogen carbonate, H2O / ethanol / 1 h / Heating 10: 28 mg / HCl / 18 h / Ambient temperature 11: POCl3-pyridine 12: 60percent acetic acid / 91 h / Ambient temperature 13: 1 mg / H2 / Pd-C / dioxane / 6 h View Scheme