1: 71 percent / acetic anhydride, 90percent nitric acid / 0.25 h / Ambient temperature 2: 80 percent / 1 N aq. NaOH, 10percent aq. hydrogen peroxide / ethanol / 0.33 h / 40 °C 3: 73 percent / conc. sulfuric acid, aq. sodium nitrite / 70 °C 4: 75 percent / conc. sulfuric acid / Heating 5: 66 percent / NO2BF4 / acetonitrile 6: 73 percent / ethanol / 1 h / -78 deg C to room temperature 7: 88 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr 8: 78 percent / pyridine / dimethylformamide / 4 h / Ambient temperature 9: 67 percent / conc. sulfuric acid / acetic acid / 5 h / 100 °C 10: 72 percent / BBr3 / benzene / 7 h / Heating 11: 85 percent / LiCl, (dimethylamino)pyridine, methanesulfonyl chloride / dimethylformamide / 6 h / Ambient temperature View Scheme

1: 71 percent / acetic anhydride, 90percent nitric acid / 0.25 h / Ambient temperature 2: 80 percent / 1 N aq. NaOH, 10percent aq. hydrogen peroxide / ethanol / 0.33 h / 40 °C 3: 81 percent / H2 / 5percent Pd on carbon / methanol / 3 h / 2585.7 Torr 4: 78 percent / acetic acid / 4.5 h / 40 °C 5: 78 percent / 10percent aq. sodium hydroxide / ethanol / 24 h / Heating View Scheme

1: 71 percent / acetic anhydride, 90percent nitric acid / 0.25 h / Ambient temperature 2: 80 percent / 1 N aq. NaOH, 10percent aq. hydrogen peroxide / ethanol / 0.33 h / 40 °C 3: 73 percent / conc. sulfuric acid, aq. sodium nitrite / 70 °C 4: 75 percent / conc. sulfuric acid / Heating 5: 66 percent / NO2BF4 / acetonitrile 6: 73 percent / methanolic ammonia / 12 h / Ambient temperature 7: 97 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr 8: 77 percent / triethylamine / benzene / 4 h / Ambient temperature 9: 71 percent / conc. sulfuric acid / acetic acid / 4 h / Heating View Scheme

1: 71 percent / acetic anhydride, 90percent nitric acid / 0.25 h / Ambient temperature 2: 80 percent / 1 N aq. NaOH, 10percent aq. hydrogen peroxide / ethanol / 0.33 h / 40 °C 3: 73 percent / conc. sulfuric acid, aq. sodium nitrite / 70 °C 4: 75 percent / conc. sulfuric acid / Heating 5: 66 percent / NO2BF4 / acetonitrile 6: 73 percent / ethanol / 1 h / -78 deg C to room temperature 7: 88 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr 8: 78 percent / pyridine / dimethylformamide / 4 h / Ambient temperature 9: 67 percent / conc. sulfuric acid / acetic acid / 5 h / 100 °C 10: 72 percent / BBr3 / benzene / 7 h / Heating View Scheme

1: 71 percent / acetic anhydride, 90percent nitric acid / 0.25 h / Ambient temperature 2: 80 percent / 1 N aq. NaOH, 10percent aq. hydrogen peroxide / ethanol / 0.33 h / 40 °C 3: 73 percent / conc. sulfuric acid, aq. sodium nitrite / 70 °C 4: 75 percent / conc. sulfuric acid / Heating 5: 66 percent / NO2BF4 / acetonitrile 6: 73 percent / ethanol / 1 h / -78 deg C to room temperature 7: 88 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr 8: 53 percent / pyridine / dimethylformamide / 6 h / Ambient temperature 9: 69 percent / conc. sulfuric acid / acetic acid / 9.5 h / 100 °C View Scheme

1: 71 percent / acetic anhydride, 90percent nitric acid / 0.25 h / Ambient temperature 2: 80 percent / 1 N aq. NaOH, 10percent aq. hydrogen peroxide / ethanol / 0.33 h / 40 °C 3: 73 percent / conc. sulfuric acid, aq. sodium nitrite / 70 °C 4: 75 percent / conc. sulfuric acid / Heating 5: 66 percent / NO2BF4 / acetonitrile 6: 73 percent / methanolic ammonia / 12 h / Ambient temperature 7: 97 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr 8: 77 percent / triethylamine / benzene / 4 h / Ambient temperature 9: 71 percent / conc. sulfuric acid / acetic acid / 4 h / Heating 10: 71 percent / BBr3 / benzene; CH2Cl2 / 5 h / Heating View Scheme

With  nitric acid; acetic anhydride 0.25 h;  Ambient temperature;