1: tetrahydrofuran / 0.17 h / -78 °C 2: tetrapropylammonium perruthenate, NMO, molecular sieves / CH2Cl2 / 0.25 h / 25 °C 3: 1.) t-BuOK, 2.) benzeneseleninic anhydride, 3.) t-BuOK 4: pyridine, DMAP / 20 h / 25 °C 5: 94 percent / TASF / tetrahydrofuran / 1 h / 25 °C 6: 1.) LHMDS / 1.) THF, 2.) THF, 0 deg C, 1 h 7: HF, pyridine / acetonitrile / 1 h / 0 °C 8: H2 / Pd/C / ethanol / 1 h View Scheme