Abstract: The method for the synthesis of ten new phosphorodiamidoates with a general formula: EtO(R₁,R₂N)P(O)N(CH₂CO₂Et)SO₂C₆H₄X ( I ), (where R₁,R₂ = Hand lower alkyl groups, X = Me, halogen and nitro groups) is described. The structures of ( I ) were confirmed by ¹H NMR and elemental analysis, A one-pot reaction was investigated; the preliminary bioassay shows.that some of these new compounds have a remarkable inhibitory effect on leaf-rust of wheat.

Key words: N-bezenesulfonylamino acetate, O-Ethylphosphoryldichioride, Bezenesul-fonylphosphoro-diamidoate