1: 100 percent / (DHQD)2AQN, K2Fe3(CN)6, K2CO3, K2OsO2(OH)4 / 2-methyl-propan-2-ol; H2O / 12 h / 0 °C 2: 19 percent / pyridine / 10 h / Ambient temperature 3: 79 percent / NaH / tetrahydrofuran / 2 h / Ambient temperature 4: 1.) BF3*OEt2 / 1.) THF, -78 deg C, 10 min, 2.) THF, 20 min 5: i-Pr2NEt / CH2Cl2 / 12 h / Ambient temperature 6: TBAF / tetrahydrofuran / 6 h / 40 °C 7: 2,6-lutidine / tetrahydrofuran / 0.33 h 8: 1.) Pd(PPh3)4, H2O, 2.) AgNO3/SiO2 / 1.) THF, 1.7 h, 2.) CH2Cl2, hexane, 2 h 9: 67 percent / PPTS / ethanol / 16 h / 40 °C View Scheme