trichlorophosphate T=95°C; 5 h;

1.1: triethylamine; 4-Acetylaminobenzenesulfonyl Azide / acetonitrile / 1 h / 0 - 20 °C 2.1: triphenylphosphine / diethyl ether / 24 h / 20 °C 2.2: 10 h / |Reflux 3.1: trichlorophosphate / 5 h / 95 °C View Scheme

1.1: triphenylphosphine / diethyl ether / 24 h / 20 °C 1.2: 10 h / |Reflux 2.1: trichlorophosphate / 5 h / 95 °C View Scheme

in tetrahydrofuran; methanol T=0 - 20°C;