1: 73.6 percent / HCOOH, 30percent aq. H2O2 / 3.5 h / 0 - 5 °C 2: 95.5 percent / K2CO3 / dimethylformamide / 12.5 h / 60 - 70 °C 3: 96.6 percent / POCl3 / CH2Cl2 / 6 h / Ambient temperature 4: 92.7 percent / H2 / 5percent Pd/C / methanol / 760 Torr / Ambient temperature 5: 45.7 percent / AcONa / 120 h / Heating 6: 96.5 percent / H2SO4 / acetic acid / 2.5 h / Heating 7: 96.8 percent / K2CO3 / acetone / 7 h / Heating 8: 57.6 percent / CsF / various solvent(s) / 3 h / 190 - 195 °C / Heating 9: 1.) (CF3CO)2O, 30percent aq. H2O2, 2.) NaIO4, 3.) 1percent aq NaHCO3 View Scheme

1: 94.6 percent / K2CO3 / dimethylformamide / 6 h / 60 - 65 °C 2: 73.6 percent / HCOOH, 30percent aq. H2O2 / 3.5 h / 0 - 5 °C 3: 95.5 percent / K2CO3 / dimethylformamide / 12.5 h / 60 - 70 °C 4: 96.6 percent / POCl3 / CH2Cl2 / 6 h / Ambient temperature 5: 92.7 percent / H2 / 5percent Pd/C / methanol / 760 Torr / Ambient temperature 6: 45.7 percent / AcONa / 120 h / Heating 7: 96.5 percent / H2SO4 / acetic acid / 2.5 h / Heating 8: 96.8 percent / K2CO3 / acetone / 7 h / Heating 9: 57.6 percent / CsF / various solvent(s) / 3 h / 190 - 195 °C / Heating 10: 1.) (CF3CO)2O, 30percent aq. H2O2, 2.) NaIO4, 3.) 1percent aq NaHCO3 View Scheme

1: 95.5 percent / K2CO3 / dimethylformamide / 12.5 h / 60 - 70 °C 2: 96.6 percent / POCl3 / CH2Cl2 / 6 h / Ambient temperature 3: 92.7 percent / H2 / 5percent Pd/C / methanol / 760 Torr / Ambient temperature 4: 45.7 percent / AcONa / 120 h / Heating 5: 96.5 percent / H2SO4 / acetic acid / 2.5 h / Heating 6: 96.8 percent / K2CO3 / acetone / 7 h / Heating 7: 57.6 percent / CsF / various solvent(s) / 3 h / 190 - 195 °C / Heating 8: 1.) (CF3CO)2O, 30percent aq. H2O2, 2.) NaIO4, 3.) 1percent aq NaHCO3 View Scheme

1: 96.6 percent / POCl3 / CH2Cl2 / 6 h / Ambient temperature 2: 92.7 percent / H2 / 5percent Pd/C / methanol / 760 Torr / Ambient temperature 3: 45.7 percent / AcONa / 120 h / Heating 4: 96.5 percent / H2SO4 / acetic acid / 2.5 h / Heating 5: 96.8 percent / K2CO3 / acetone / 7 h / Heating 6: 57.6 percent / CsF / various solvent(s) / 3 h / 190 - 195 °C / Heating 7: 1.) (CF3CO)2O, 30percent aq. H2O2, 2.) NaIO4, 3.) 1percent aq NaHCO3 View Scheme

1: 92.7 percent / H2 / 5percent Pd/C / methanol / 760 Torr / Ambient temperature 2: 45.7 percent / AcONa / 120 h / Heating 3: 96.5 percent / H2SO4 / acetic acid / 2.5 h / Heating 4: 96.8 percent / K2CO3 / acetone / 7 h / Heating 5: 57.6 percent / CsF / various solvent(s) / 3 h / 190 - 195 °C / Heating 6: 1.) (CF3CO)2O, 30percent aq. H2O2, 2.) NaIO4, 3.) 1percent aq NaHCO3 View Scheme

1: 45.7 percent / AcONa / 120 h / Heating 2: 96.5 percent / H2SO4 / acetic acid / 2.5 h / Heating 3: 96.8 percent / K2CO3 / acetone / 7 h / Heating 4: 57.6 percent / CsF / various solvent(s) / 3 h / 190 - 195 °C / Heating 5: 1.) (CF3CO)2O, 30percent aq. H2O2, 2.) NaIO4, 3.) 1percent aq NaHCO3 View Scheme

1: 96.5 percent / H2SO4 / acetic acid / 2.5 h / Heating 2: 96.8 percent / K2CO3 / acetone / 7 h / Heating 3: 57.6 percent / CsF / various solvent(s) / 3 h / 190 - 195 °C / Heating 4: 1.) (CF3CO)2O, 30percent aq. H2O2, 2.) NaIO4, 3.) 1percent aq NaHCO3 View Scheme

1: 57.6 percent / CsF / various solvent(s) / 3 h / 190 - 195 °C / Heating 2: 1.) (CF3CO)2O, 30percent aq. H2O2, 2.) NaIO4, 3.) 1percent aq NaHCO3 View Scheme