in benzene Ambient temperature;

1: 64.6 percent / Br2 / CCl4 / 2.25 h / Heating; Irradiation 2: 99 percent / cc. H2SO4 / 7 h / Ambient temperature 3: 98percent N2H4*H2O / ethanol / 6 h / Ambient temperature 4: 93 percent / benzene / Ambient temperature View Scheme

1: 98percent N2H4*H2O / ethanol / 6 h / Ambient temperature 2: 93 percent / benzene / Ambient temperature View Scheme