From Amides and Phosphorus v Halides

From Amides and Phosphorus(v) Halides.—Aminodifluorophosphine, FgP NHz, which was only recently reported, has been shown to undergo the Kirsanov reaction, giving an iV-phosphinophosphazene, of which there are few examples known  

A surprising feature of the n.m.r. spectrum of this derivative was the apparent absence of P-N-P spin-spin coupling, since previous derivatives of this type have been characterized by relatively large coupling constants (cfl. 100 Hz). A new and convenient route to the A-phosphinylphosphazene, Cl2P(0) N=PCl3, has been reported  

The reaction is general for ammonium salts, but for optimum yields ammonium sulphate is preferred. Further details of the stepwise synthesis of linear oligomeric phosphazenes have appeared. The introduction of each phosphazene unit is accomplished by reaction of a F-chlorophosphazene with hexamethyldisilazane, (Me3Si)2NH, and, subsequently, phosphorus pentachloride. The reactions with A-phosphinothioylphosphazenes are thus  

The possibility of obtaining compounds with useful physiological activity still prompts investigations into the properties of phosphazenyl-triazines such as (3), which was characterized as its trianilino- and triphenoxy-derivatives. Full experimental details of the reaction of sulphamic acid with phosphorus pentachloride to give the phosphazenyl 

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A. From Amides and Phosphorus(v) Halides.—The Kirsanov reaction remains one of the most important routes to acyclic phosphazenes some recent examples of this reaction are summarized below ... 

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