Improved synthesis of cyclic and polymeric phosphazenes based on facile chlorine substitution with phenols promoted by cesium carbonate

In this report we describe a very convenient synthetic method for the preparation in high yields and purity of cyclic [N3P3(OCH2CF3)6] and [N3P3(OC6H4R)6] (R = Br, CN, CHO, COC6H5, COCH3, H, OCH3), and polymeric [NP(OC6H4R)2]n (R = Br, CHO, COC6H5, H, But) phosphazenes from the direct reaction of the trimer [N3P3Cl6] or the high polymer [NPCl2]n and the alcohol HOCH2CF3 or the para‐substituted phenols HOC6H4R, using Cs2CO3 as proton abstractor and acetone or tetrahydrofuran as solvent.