1: 79 percent / conc. H2SO4, HNO3(D=1.4) / 0.5 h / 60 - 70 °C 2: 95 percent / PCl3 / CHCl3 / 1 h / Heating 3: 92 percent / 100percent N2H4 / ethanol / Heating 4: 28 percent / CH3COOAg / 1 h / Heating View Scheme

1: 79 percent / conc. H2SO4, HNO3(D=1.4) / 0.5 h / 60 - 70 °C 2: 79 percent / CH3COCl / 1 h / Ambient temperature 3: 51 percent / 100percent N2H4 / ethanol / 1.) 1 h, room temperature; 2.) 12 h, 0 deg C 4: 65 percent / CH3COOAg / H2O / 1 h / Heating View Scheme

1: 73 percent / 2 h / Heating 2: 84 percent / H2O / 120 - 130 °C 3: 73 percent / PCl3 / CHCl3 / 22 h / Heating View Scheme

1: 73 percent / 2 h / Heating 2: 84 percent / H2O / 120 - 130 °C 3: 73 percent / PCl3 / CHCl3 / 22 h / Heating 4: 76 percent / benzene / 0.5 h / 25 °C View Scheme

1: 73 percent / 2 h / Heating 2: 84 percent / H2O / 120 - 130 °C 3: 73 percent / PCl3 / CHCl3 / 22 h / Heating 4: 81 percent / benzene / 17 h / 25 °C View Scheme