| 摘要 |
SYNTHESIS AND APPLICATIONS OF 2-OXO-4-METHYLTHIOBUTYRIC ACID, ITS SALTS AND ITS DERIVATIVES The invention relates to a process for preparing 2-oxo-4-methylthiobutyric acid (I), its salts and its derivatives in which R represents a group chosen from COOH, COOR', NH2, NHR' or NR'R", where R' and R" are chosen, independently of one another, from the group of linear or branched alkyl radicals having from 1 to 12 carbon atoms and cycloalkyl radicals having from 3 to 12 carbon atoms, according to which process but-3-ene-1,2-diol (II) is catalytically and selectively oxidized to give 2-oxobut-3-enoic acid (III) and methyl mercaptan is selectively condensed with 2-oxobut-3-enoic acid (III). 2-Oxo-4-methylthiobutyric acid (1), its salts and its derivatives are used as food supplement, in particular in animal nutrition. |
