FIELD: organic chemistry. SUBSTANCE: product: dimethyl-N-(4-methylphenyl)carbamoylphosphonate, empirical formula is C10H14NO4P, yield is 60%, m. p. is 98-100 C; dimethyl-N-(4-chlorophenyl)carbamoylphosphonate, empirical formula is C9H11ClNO4P, yield is 70%, m. p. is 97-99 C. Reagent 1: (CH3O)2P(O)H. Reagent 2: compound of the formula (I) 
where R - CH3 or Cl. Reaction conditions: in the presence of catalytic quantities of triethylamine, at 50 C. EFFECT: improved method of synthesis. 5 tbl
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