FIELD: organophosphate compounds. SUBSTANCE: product: mono- or diacylphosphine oxides of the formula: R1R2P(O)-C(O)-R3 where R1 - C1-C8-alkyl substituted with alkoxy-group or phenyl; R2 or -C(O)-R3 and OR4 means residue: R1, or R2 together with P form mono-, di- or tricyclic ring with 4-15 carbon atoms; R3 - alkyl, C5-C10 - cycloalkyl, phenyl; R4 - alkyl. Reagent 1: R1P(OR4)2 and R1PH2. Reagent 2: R3C(O)Cl. Reagent 3: oxidizing agent. Reaction conditions: in solvent medium, at 20-120 C. EFFECT: improved method of synthesis. 10 cl, 5 tbl
