1: 96 percent / aq. HCl / tetrahydrofuran / 12 h / 20 °C 2: 66 percent / NH2OH*HCl; pyridine / ethanol / Heating 3: 54 percent / pyridine / CH2Cl2 / 4 h 4: 90 percent / Me3SiOTf / CH2Cl2 / 4 h / 0 °C 5: 59 percent / DIBAl / hexane / 2.5 h / 20 °C 6: 98 percent / H2 / Pd/C / ethyl acetate / 20 °C 7: 67 percent / TiCl4 / CH2Cl2 / 1 h / -78 °C 8: 74 percent / Et3N / CH2Cl2 / 1 h / 0 °C 9: 67 percent / LiAlH4 / diethyl ether / Heating View Scheme