CYCLIC ORGANOPHOSPHORUS COMPOUNDS .X. SYNTHESIS OF N-(2-AMINOETHYL)PHOSPHORAMIDIC ACIDS,CYCLIC PHOSPHORODIAMIDATES,AND RELATED COMPOUNDS

Reaction between ethylenediamine and aryl phosphorodichloridates yields aryl hydrogen N-(2-aminoethyl)-phosphoramidates and not cyclic phosphorodiamidates as reported earlier, l.r. spectroscopy distinguishes between such acids and true cyclic phosphorodiamidates made from trimethylenediamine. 1,2-, 1,3-, and 1,4-Diaminoalkanes cyclise with phenyl phosphorodichloridothionate. o-Phenylenediamine behaves analogously to ethylenediamine.