1: 82 percent / H2 / Ru-Alox / ethyl acetate / 24 h / 60 °C 2: 97 percent / TMSCl; NaI / acetonitrile / 40 °C 3: pig liver esterase / 35 °C / pH 8.0 4: 81 percent / DPPA; Et3N / CH2Cl2 / 40 °C 5: DMAP / 20 °C 6: NaH / toluene / Heating 7: pyridine / CH2Cl2 / -10 °C 8: NaN3 / acetone; H2O / 20 °C 9: H2 / Ra-Co 10: Et3N 11: HBr; AcOH View Scheme