METHOD FOR PREPARING N-SUBSTITUTED ETHYL-(2-DIALKOXYPHOSPHORYL-4-CYANO)-BUTANEIMIDATES

FIELD: chemistry of organophosphorus compounds, chemical technology. ^ SUBSTANCE: invention relates to a novel method for preparing N-substituted phosphorylated imidates bearing cyanoethyl-group in structure. Invention describes a method for preparing N-substituted ethyl-(2-dialkoxyphosphoryl-4-cyano)butaneimidates of the formula: wherein R means (C3-C4)-alkyl or isoalkyl; R' means C(O)CH3, C(O)C6H5, Si(CH3)3. Method involves interaction of N-substituted ethyl-(2-dialkoxyphosphoryl)ethaneimidates with acrylonitrile in the presence of sodium ethylate as a catalyst in dioxane medium in the mole ratio N-substituted ethyl-(2-dialkoxyphosphoryl)ethaneimidate : acrylonitrile : sodium ethylate = 1:(1.05-1.15):(0.1-0.15), respectively, at temperature 40-60oC. Invention provides preparing new chemical compounds that are perspective for preparing biologically active compounds used in medicine and agriculture. ^ EFFECT: improved preparing method. ^ 4 ex