METHOD FOR PRODUCING LOWER ALKYL ESTER OF (R)-4-CYANO-3- HYDROXYBUTYRIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a method for efficiently producing a lower alkyl ester of (R)-4-cyano-3-hydroxybutyric acid in high purity. SOLUTION: This method relates to a method for producing the lower alkyl ester of the (R)-4-cyano-3-hydroxybutyric acid, and comprises carrying out the distillation after filtering an organic solvent phase obtained by extracting and separating the lower alkyl ester of the (R)-4-cyano-3-hydroxybutyric acid from a reaction liquid after cyanation.