1: diphenylphosphoroazidate, triethylamine / toluene 2: 8.2 g / pyridine / Ambient temperature 3: pyridine / benzene / 6 h / Ambient temperature 4: water / 1 h / Heating 5: benzene View Scheme

1: 8.2 g / pyridine / Ambient temperature 2: pyridine / benzene / 6 h / Ambient temperature 3: water / 1 h / Heating 4: benzene View Scheme

1: pyridine / benzene / 6 h / Ambient temperature 2: water / 1 h / Heating 3: benzene View Scheme

in benzene