1: 80 percent / Cu(acac)2 / 70 h / 60 °C 2: ([Bu]2Sn(Cl))2O / ethanol / 24 h / Heating 3: 90 percent 4: 73 percent / NaBH3CN / acetic acid 5: HCO2NH4 / 10 percent Pd/C / acetic acid / 3 h / 20 °C 6: aq. NaHCO3 / 3 h / 20 °C 7: 87 percent / DEAD; PPh3 / 1 h / 0 °C 8: DMAP / pyridine 9: 0.1 N HCl / methanol / 3 h / 60 °C View Scheme