1: 1-amino-2-nitro-4-methylbenzene With hydrogenchloride in water T=80°C; Meerwein method; 0.5 h; 2: With sodium nitrite in water T=-10 - 0°C; 0.666667 h; 3: furfural With copper dichloride in water; acetone T=20°C; 12 h;