1: 66 percent / NO2BF4 / acetonitrile 2: 73 percent / ethanol / 1 h / -78 deg C to room temperature 3: 88 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr 4: 78 percent / pyridine / dimethylformamide / 4 h / Ambient temperature 5: 67 percent / conc. sulfuric acid / acetic acid / 5 h / 100 °C 6: 72 percent / BBr3 / benzene / 7 h / Heating 7: 85 percent / LiCl, (dimethylamino)pyridine, methanesulfonyl chloride / dimethylformamide / 6 h / Ambient temperature View Scheme

1: 66 percent / NO2BF4 / acetonitrile 2: 73 percent / methanolic ammonia / 12 h / Ambient temperature 3: 97 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr 4: 77 percent / triethylamine / benzene / 4 h / Ambient temperature 5: 71 percent / conc. sulfuric acid / acetic acid / 4 h / Heating View Scheme

1: 66 percent / NO2BF4 / acetonitrile 2: 73 percent / ethanol / 1 h / -78 deg C to room temperature 3: 88 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr 4: 78 percent / pyridine / dimethylformamide / 4 h / Ambient temperature 5: 67 percent / conc. sulfuric acid / acetic acid / 5 h / 100 °C 6: 72 percent / BBr3 / benzene / 7 h / Heating View Scheme

1: 66 percent / NO2BF4 / acetonitrile 2: 73 percent / ethanol / 1 h / -78 deg C to room temperature 3: 88 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr 4: 53 percent / pyridine / dimethylformamide / 6 h / Ambient temperature 5: 69 percent / conc. sulfuric acid / acetic acid / 9.5 h / 100 °C View Scheme

1: 66 percent / NO2BF4 / acetonitrile 2: 73 percent / methanolic ammonia / 12 h / Ambient temperature 3: 97 percent / H2 / 5percent Pd/C / methanol / 4 h / 2585.7 Torr 4: 77 percent / triethylamine / benzene / 4 h / Ambient temperature 5: 71 percent / conc. sulfuric acid / acetic acid / 4 h / Heating 6: 71 percent / BBr3 / benzene; CH2Cl2 / 5 h / Heating View Scheme