| 摘要 |
FIELD: chemistry.SUBSTANCE: invention refers to using DL-methionyl-DL-methionine and its salts as a fodder additive in fodder mixtures for animals bred and grown in aquaculture farms. Invention also relates to a method of producing DL-methionyl-DL-methionine of formula (I), where residues Rand Rin urea derivatives IIa, IIb, IIc, IIe and IIf have the following values: in compound IIa Rdenotes COOH, and Rdenotes NHCONH, in compound IIb Rdenotes CONH, and Rdenotes NHCONH, in compound IIc Rdenotes CONH, and Rdenotes NH, in compound IIe Rdenotes CN, and Rdenotes OH, in compound IIf Rdenotes CN, and Rdenotes NH, in DL-methionyl-DL-methionine (I), by transformation of urea derivative of general formula (II), when the pH value of solution containing urea derivative is set to a value ranging from 8 to 14, and the reaction is carried out at a temperature from 50 to 200°C.EFFECT: technical result is the novel method of producing DL-methionyl-DL-methionine, which is applicable as a fodder additive in fodder mixtures for animals bred and grown in aquaculture farms.26 cl, 11 dwg, 7 tbl, 26 ex |
