phosphoric acid trimethyl ester; ammonium hydroxide; trichlorophosphate T=0 - 5°C; 1.5 h;

1: 47 percent / NH3 / methanol / 8 h / 130 °C / high pressure 2: 41 percent / POCl3, trimethylphosphate; NH4OH / 1.5 h / 0 - 5 °C View Scheme

1: 37 percent / 60percent NaH / dimethylformamide / 0.5 h / Ambient temperature 2: 47 percent / NH3 / methanol / 8 h / 130 °C / high pressure 3: 41 percent / POCl3, trimethylphosphate; NH4OH / 1.5 h / 0 - 5 °C View Scheme