1: 70 percent / CsF, N,N-diethylaniline / 3 h / Heating 2: 94 percent / 10percent NaOH / ethanol / Ambient temperature 3: 87 percent / acetic acid / 2-ethoxy-ethanol; H2O / 0.08 h / 110 - 120 °C 4: 91 percent / NaOH / H2O; ethanol / 4 h / Heating 5: 94 percent / H2, 1percent aq.PdCl2, Norit / acetic acid / 760 Torr / Ambient temperature 6: 86 percent / POCl3, K2CO3 / acetonitrile / 2.5 h / 55 - 60 °C 7: 1.) TiCl4, 2.) NaBH4 / 1.) CHCl3, a) RT, 2.5 h, b) reflux, 30 min, 2.) MeOH, RT, overnight 8: 91 percent / CHCl3 / 3 h / Heating 9: 89 percent / DDQ / benzene / 2 h / Heating 10: 77 percent / OsO4, pyridine / 2 h / Ambient temperature 11: 70 percent / HIO4*2H2O / H2O; dioxane / 2 h / Ambient temperature 12: 92 percent / K2CO3 / dimethylformamide / 2 h / Ambient temperature 13: 49 percent / 1.) p-toluenesulfonic acid, 2.) aq. 10percent HCl / xylene / 7.5 h / Heating View Scheme

1: CsF 2: acid treatment 3: OH(1-) 7: 2.) p-toluenesulfonic acid / 1.) xylene, 2.) reflux View Scheme

1: 70 percent / CsF, N,N-diethylaniline / 3 h / Heating 2: 94 percent / 10percent NaOH / ethanol / Ambient temperature 3: 87 percent / acetic acid / 2-ethoxy-ethanol; H2O / 0.08 h / 110 - 120 °C 4: 91 percent / NaOH / H2O; ethanol / 4 h / Heating 5: 94 percent / H2, 1percent aq.PdCl2, Norit / acetic acid / 760 Torr / Ambient temperature 6: 86 percent / POCl3, K2CO3 / acetonitrile / 2.5 h / 55 - 60 °C 7: 1.) TiCl4, 2.) NaBH4 / 1.) CHCl3, a) RT, 2.5 h, b) reflux, 30 min, 2.) MeOH, RT, overnight 8: 91 percent / CHCl3 / 3 h / Heating 9: 89 percent / DDQ / benzene / 2 h / Heating 10: 77 percent / OsO4, pyridine / 2 h / Ambient temperature 11: 70 percent / HIO4*2H2O / H2O; dioxane / 2 h / Ambient temperature 12: 92 percent / K2CO3 / dimethylformamide / 2 h / Ambient temperature 13: 49 percent / 1.) p-toluenesulfonic acid, 2.) aq. 10percent HCl / xylene / 7.5 h / Heating 14: 76 percent / NaBH4 / methanol / 0.5 h / Ambient temperature View Scheme