1: With hydrogen; nickel in ethyl acetate P=2844.39 Torr; 5 h; 2: With hydrogenchloride in diethyl ether; ethyl acetate 1 h;

1: With hydrogenchloride in water; acetonitrile T=5°C; 0.166667 h; 2: With sodium nitrite in water; acetonitrile T=-5°C; 0.25 - 0.333333 h; 3: With sulfur dioxide; copper dichloride in water; acetic acid; acetonitrile T=0 - 20°C; 1.5 h;