1: aniline With hydrogenchloride; sodium nitrite in water T=0 - 5°C; 2: 2,3-Difluoro-phenol With sodium hydroxide in water 3: With hydrogenchloride more than 3 stages;

hydrogen; palladium 10 on activated carbon in ethanol T=20°C; P=750.075 Torr; 18 h;