Popis: |
The substrate specificity of the heat-stable stereospecific amidase from Klebsiella oxytoca was investigated. In addition to the original substrate, 3,3,3-trifluoro-2-hydroxy-2-methylpropanamide, the amidase accepted 2-hydroxy-2-(trifluoromethyl)-butanamide and 3,3,3-trifluoro-2-amino-2-methylpropanamide as substrates. Compounds with larger side chains and compounds where the hydroxyl group was substituted with a methoxy group, or in which the CF 3 group was substituted by CCl 3 , were not accepted. The biotransformation is a new synthetic route to ( R )-(+)-3,3,3-trifluoro-2-amino-2-methylpropanoic acid, and its related ( S )-(−)-amide, and to ( R )-(+)-2-hydroxy-2-(trifluoromethyl)-butanoic acid and its related ( S )-(−)-amide. |