METHOD FOR PRODUCING 2-HYDROXY-4-METHYLESETRIC OIL ACID AS AN INDIVIDUAL SUBSTANCE OR AS A MIXTURE WITH ITS SURFOR ANALOGUE, ITS APPLICATION IN FOOD, IN PARTICULAR IN ANIMAL

摘要

1. The method of obtaining 2-hydroxy-4-methylselenobutyric acid, characterized in that it comprises the steps! interactions of 3-methylselenopropionaldehyde of the formula (I)! ! with an alkali metal cyanide of the formula M + CN-, preferably in the presence of an alkali metal bisulfite salt of the formula M + HSO3 -, where M represents an alkali metal atom in a polar protic solvent,! to get the compound 2-hydroxy-4-methylselenobutyronitrile of the formula (II)! ! which is hydrolyzed in a hot concentrated strong acid medium, in a polar protic solvent, to obtain the expected compound of formula (IV):! ! which can be converted into one of its salts after the addition of a physiologically acceptable base. ! 2. The method according to claim 1, characterized in that the compound of formula (II) is hydrolyzed in a medium of hot concentrated sulfuric acid in a polar protic solvent to obtain a compound of formula (III)! ! which itself is hydrolyzed in a medium of concentrated concentrated strong acid to obtain a compound of formula (IV). ! 3. The method according to claim 1, characterized in that the alkali metal cyanide is selected from sodium cyanide, potassium cyanide and lithium cyanide. ! 4. The method according to claim 2, characterized in that the alkali metal cyanide is selected from sodium cyanide, potassium cyanide and lithium cyanide. !5. The method according to claim 1, characterized in that the polar protic solvent is water. ! 6. The method according to claim 2, characterized in that the polar protic solvent is water. ! 7. The method according to claim 3, characterized in that the polar protic solvent is water. ! 8. The method according to claim 4, characterized in that the polar proton solvent