triethylamine; trichlorophosphate in dichloromethane T=10°C; 2 h;

1: 98.4 percent / toluene / 8 h / Heating 2: 85 percent / phosphoryl chloride, triethylamine / CH2Cl2 / 2 h / 10 °C View Scheme

1: toluene-4-sulfonic acid / toluene / 5 h / |Reflux 2: acetic anhydride / formic acid / 5 h / 20 °C 3: trichlorophosphate; triethylamine / tetrahydrofuran / 2 h / -78 - 20 °C / |Inert atmosphere View Scheme

1: toluene-4-sulfonic acid / toluene / 5 h / |Reflux 2: acetic anhydride / formic acid / 5 h / 20 °C 3: trichlorophosphate; triethylamine / tetrahydrofuran / 2 h / -78 - 20 °C / |Inert atmosphere View Scheme

1: acetic anhydride / formic acid / 5 h / 20 °C 2: trichlorophosphate; triethylamine / tetrahydrofuran / 2 h / -78 - 20 °C / |Inert atmosphere View Scheme