OBTAINING AND USING METHIONYL-METHIONINE AS AN ADDITIVE TO FODDERS FOR FISHES AND CRUSTACEANS Russian patent published in 2016 - IPC C07C319/20 C07C319/28 C07C321/16 C07D241/08 A23K20/142 A23K50/80 

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 R¹ and R² in urea derivatives IIa, IIb, IIc, IIe and IIf have the following values: in compound IIa R¹ denotes COOH, and R² denotes NHCONH₂, in compound IIb R¹ denotes CONH₂, and R² denotes NHCONH₂, in compound IIc R¹ denotes CONH₂, and R² denotes NH₂, in compound IIe R¹ denotes CN, and R² denotes OH, in compound IIf R¹ denotes CN, and R² denotes NH₂, 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