1: 3-pentafluorosulfuraniline With sulfuric acid; sodium nitrite in water; acetic acid T=0°C; 0.0333333 h; 2: potassium cyanide With CuSO4‵5H2O; sodium hydrogencarbonate in water; acetic acid; benzene T=0 - 20°C; 2.5 h;

1.1: hydrogenchloride; iron / ethanol; water / 1.5 h / 20 °C 2.1: sulfuric acid; sodium nitrite / water; acetic acid / 0.03 h / 0 °C 2.2: 2.5 h / 0 - 20 °C View Scheme

water; sodium hydroxide in 1,4-dioxane Reflux;