FIELD: organic chemistry. SUBSTANCE: products: phosphorylated serines of the formula RP(O)(OH)-OCH2)COOH where R - saturated or unsaturated aliphatic hydrocarbon residue with direct or branched chain containing from 6 to 30 carbon atoms which can be substituted with halogen, OR′,-SR′ or -NR′R″-group where R′ and R″ are lower alkyls. Reagent 1: RP(O)(OH) where R as indicated above. Reagent 2: HOCH2CH(NHY)-C(O)-OX where X - benzyl, tert. -butyl, phthalimidomethyl, isopropyl, benzhydryl; Y - N-benzoylcarbonyl, N- tert. -butoxycarbonyl, N-phthaloyl. Reaction conditions: in the presence of condensing agent followed by protective groups desplitting. EFFECT: improved method of synthesis. 4 cl, 1 tbl
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