thionyl chloride; ammonia 1) -10 deg C, 30 min; 2) room temperature, 1 h; 40 deg C, 6 h; 3) CHCl3, 0 deg C, 15 min; room temperature, 15 min; Yield given. Multistep reaction;

1: With sodium periodate in water T=20°C; 2 h; 2: With sodium hydroxide in water T=20°C; 24 h;

hydrogenchloride

hydrogenchloride