in N,N-dimethyl-formamide T=160°C; 18 h;

hydrogenchloride; sodium nitrite in water; sodium hydrogencarbonate; acetic acid

1: 2-Amino-5-nitrotrifluoromethylbenzene With sulfuric acid in water 2: With sodium nitrite in water T=0°C; 0.333333 h; 3: potassium cyanide With sodium carbonate; copper(II) sulfate more than 3 stages;

1: aqueous H2SO4 / 182 °C 2: iron; aqueous NH4Cl View Scheme

sulfuric acid; water T=165°C; 2 h;