1: 35 percent / Pd(PPh3)4, Et3N / tetrahydrofuran / 5 h / Heating 2: 25 percent / toluene / 5 h / 220 - 230 °C / in sealed tube 3: 90 percent / OsO4, Me3NO, pyridine / 2-methyl-propan-2-ol; H2O / 18 h / Heating 4: 81 percent / SO3-pyridine, Et3N / 20 h / 20 °C 5: 85 percent / NaTeH / ethanol / 0.5 h / 23 °C 6: 87 percent / t-BuNH3-BH3 / methanol / 21 h / 23 °C 7: 95 percent / TsOH / benzene / 1 h / 23 °C 8: 94 percent / MCPBA / CH2Cl2 / 0.5 h / -25 °C 9: 68 percent / CaCO3 / toluene / 70 h / Heating 10: 92 percent / LiOMe / tetrahydrofuran / 72 h / 23 °C 11: 89 percent / LiAlH4 / diethyl ether / 1 h / Heating 12: 90 percent / DMAP / 1,2-dichloro-ethane / 6 h / Heating 13: 83 percent / 1.) OsO4, 2.) H2S / 1.) pyridine, 20 deg C, 30 h, 2.) chloroform - dioxane, 23 deg C, 0.5 h 14: 91 percent / NaH / hexamethylphosphoric acid triamide; tetrahydrofuran / 3 h / 23 °C 15: 95 percent / TsOH / CHCl3; methanol / 0.67 h / 20 °C 16: 96 percent / pyridine / 2 h / 20 °C 17: 95 percent / TsOH / 0.25 h / 20 °C 18: 95 percent / LiAlH4 / diethyl ether / 0.17 h / 0 °C 19: 78 percent / SO3-pyridine, Et3N / dimethylsulfoxide / 16 h / 23 °C 20: 80 percent / tetrahydrofuran / 2 h / -78 - 20 °C 21: 79 percent / MnO2 / benzene / 3 h / 23 °C 22: 93 percent / diethyl ether / 0.25 h / -78 °C 23: 95 percent / 1.) 3 N HCl - THF, 23 deg C, 1 h, then 0.2 N KOH - THF - MeOH, 23 deg C, 20 min 24: 78 percent / 1.) PhSeCl, 2.) Ra-Ni(W-2) / 1.) CH2Cl2, 0 deg C, 38 h, 2.) EtOH, reflux, 5 min 25: 97 percent / n-Bu4NF / tetrahydrofuran / 5 h / 23 °C 26: 89 percent / n-Bu3P / tetrahydrofuran / 0.5 h / 23 °C 27: 84 percent / 30percent H2O2 / CH2Cl2 / 20 h / 18 °C 28: 96 percent / 1.) DDQ, 2.) K2CO3 / 1.) CH2Cl2 - H2O, 23 deg C, 48 h, 2.) MeOH, 23 deg C, 40 min 29: 77 percent / aq. HClO4; tetrahydrofuran / 60 h / 23 °C 30: 85 percent / pyridine / 9 h / 0 °C View Scheme