Regio- and stereoselective nucleophilic additions of amines, thiols and aminophosphanes to the CC bond of P,P-diphenyl-P-(2-phenylethynyl)-λ5-phosphazenes

Nitrogen and sulfur nucleophiles, such as amines, thiophenols, and aminophosphanes, add to the triple bond of P-ethynyl-λ5-phosphazenes to give regio and diastereoselectively P-ethenyl-λ5-phosphazenes. An equally selective substitution reaction, occurring by an addition–elimination pathway, on bis(iminophosphoranyl)ethenes has been also achieved.