1: hydrogenchloride / water; methanol / 2 h / 40 °C 2: hydrogenchloride; trichlorophosphate; phosphorous pentoxide / 2 h / 0 - 30 °C View Scheme

1: With hydrogenchloride; tin in water; acetic acid T=60°C; 3 h; 2: With ammonium hydroxide in water; acetic acid pH=9;