N-(triphenylphosphoranylidene)sulphamoyl pseudohalides. Part I. Preparation of the azide and its reaction with phosphites and thiophosphites

Abstract

The preparation of N-(triphenylphosphoranylidene)sulphamoyl azide. Ph₃P:N·SO₂N₃, by reduction of the hydrazide with nitrous acid or by reaction of sodium azide with the chloride in methyl ethyl ketone, is described. The azide reacts with phosphites and thiophosphites to produce compounds of the type Ph₃P:N·SO₂·N:P(OR)₃(R = Me, Et, Prⁿ, Buⁿ, or Ph), and Ph₃P:N·SO₂·N:P(SR)₃(R = Et or Prⁿ), respectively.