1: With sulfuric acid; acetic acid in water; acetonitrile T=0°C; 2: With sodium nitrite in water; acetonitrile T=0 - 20°C; 0.333333 h; 3: With potassium iodide in water; acetonitrile T=50°C;

nitric acid; acetic anhydride T=-10°C; 2 h;

potassium carbonate in ethanol 24 h; Ambient temperature;

1: With hydrogenchloride; ethanol; water; iron T=110°C; 2 h; 2: in ethanol; water pH=11; Alkaline aqueous solution;