sulfuric acid; nitric acid T=0°C; 2 h;

1: CF3COOH; aq. H2O2 / 6.5 h / Heating 2: HNO3; H2SO4 / 160 °C 3: AcOH; Fe / Heating 4: HNO3; H2SO4 / 20 °C View Scheme

1: HNO3; H2SO4 / 160 °C 2: AcOH; Fe / Heating 3: HNO3; H2SO4 / 20 °C View Scheme

1: AcOH; Fe / Heating 2: HNO3; H2SO4 / 20 °C View Scheme

1: lithium hydroxide hydrate / tetrahydrofuran; water / 0.33 h / 25 °C 2: oxalyl dichloride / dichloromethane; tetrahydrofuran / 4 h / 25 °C 3: sodium azide / water; acetone / 0.03 h / 25 °C 4: trifluoroacetic acid / benzene / 21 h / 90 °C 5: potassium carbonate / methanol / 7.5 h / 25 °C 6: sulfuric acid; nitric acid / -5 °C View Scheme

1: trichlorophosphate / 24 h / 130 °C 2: lithium hydroxide hydrate / tetrahydrofuran; water / 0.33 h / 25 °C 3: oxalyl dichloride / dichloromethane; tetrahydrofuran / 4 h / 25 °C 4: sodium azide / water; acetone / 0.03 h / 25 °C 5: trifluoroacetic acid / benzene / 21 h / 90 °C 6: potassium carbonate / methanol / 7.5 h / 25 °C 7: sulfuric acid; nitric acid / -5 °C View Scheme

1: oxalyl dichloride / dichloromethane; tetrahydrofuran / 4 h / 25 °C 2: sodium azide / water; acetone / 0.03 h / 25 °C 3: trifluoroacetic acid / benzene / 21 h / 90 °C 4: potassium carbonate / methanol / 7.5 h / 25 °C 5: sulfuric acid; nitric acid / -5 °C View Scheme

1: sodium azide / water; acetone / 0.03 h / 25 °C 2: trifluoroacetic acid / benzene / 21 h / 90 °C 3: potassium carbonate / methanol / 7.5 h / 25 °C 4: sulfuric acid; nitric acid / -5 °C View Scheme

1: trifluoroacetic acid / benzene / 21 h / 90 °C 2: potassium carbonate / methanol / 7.5 h / 25 °C 3: sulfuric acid; nitric acid / -5 °C View Scheme

1: potassium carbonate / methanol / 7.5 h / 25 °C 2: sulfuric acid; nitric acid / -5 °C View Scheme