Preparation of N-phosphorylated and silylated 1,3,2-oxaza(diaza)phospholanes and phosphorinanes

Conclusions 1.The reaction of N-phenyl(benzyl)ethylenediamine with the full amides of phosphorous acid gave a number of N-phosphorylated 1,3,2-diazaphospholanes.2.The reaction of alkanolamines with the diamides of alkylphosphorous acids, followed by treatment with trimethylsilyldiethylamine in the presence of catalytic amounts of ammonium sulfate, gave N-silylated 1,3,2-oxazaphospholanes and phosphorinanes.