Described herein are compositions and methods for generating oxidoreductases for enantioselective reactions. Described herein are compositions and methods for generating neomorphic (R)-2-hydroxyacid dehydrogenases capable of enzymatically converting a 1-carboxy-2-ketoacid to a 1-carboxy-(R)-2-hydroxyacid, or the reverse reaction. Illustrative examples include (a) (R)-2-hydroxyadipate dehydrogenase and uses thereof for converting 2-oxoadipate to (R)-2-hydroxyadipate, or the reverse reaction; and (b) (R)-2-hydroxyglutarate dehydrogenase and uses thereof for converting 2-oxoglutarate to (R)-2-hydroxyglutarate, or the reverse reaction. Also described herein are compositions and methods for generating non-natural microbial organisms to enzymatically convert 2-oxoadipate to (E)-2-hexenedioate or adipate, or to enzymatically convert 2-oxoglutarate to (E)-2-pentenedioate or glutarate, or the respective reverse reactions.