Process for preparing optically pure (S)-3-hydroxy-gamma-butyrolactone

摘要

The present invention relates to a process for preparing optically pure (S)-3-hydroxy-gamma-butyrolactone expressed by the following Formula 1 and more particularly, to a process that enables preparing optically pure (S)-3-hydroxy-gamma-butyrolactone economically in large quantities, by: (a) Preparing alpha-(1,4) linked oligosaccharide with adequate sugar distribution by reacting starch which is easily available from natural product with enzyme under a specific condition; and (b) Performing oxidation and cyclization sequentially under a specific condition.