Abstract
The monoacylhydrazides, as well as hydrazines, react with phosphoallenic derivatives 1 to lead to the δ5-N-2 acyl 3-dimethylamino 3-oxo-1,2,3-diazaphospholine 2 . The reaction of ring opening in δ5-N-2 acyl-3-dimethylamino-3-oxo-1,2,3-diazaphospholine by different alcohols leads to the β-phosphonyl-hydrazide 3 . The structure of products ( 2 and 3 ) is further confirmed by IR, 1H, NMR, 13P NMR, 13C NMR spectra.