1: With N-chloro-succinimide; water; acetic acid T=20°C; 3 h; 2: With sodium hydrogencarbonate in water

1: With hydrogenchloride; sodium nitrite in water T=0°C; 0.166667 h; 2: With hydrogenchloride; sodium hydrogensulfite; copper(II) sulfate in water T=0 - 20°C; 0.5 h;