Process for preparing optically pure...

Details Process for preparing optically pure... Process for preparing optically pure...

C - Chemistry, Metallurgy

12

P

C12P 41/00 (2006.01) C07C 51/00 (2006.01) C07D 307/33 (2006.01) C12P 7/42 (2006.01) C12P 17/04 (2006.01) C12P 19/14 (2006.01) C12P 19/22 (2006.01)

Patent

CA 2338527

The present invention relates to a process for preparing optically pure (S)-3- hydroxy-.gamma.-butyrolactone expressed by the 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 amylopectin which is easily available from natural product with enzyme under a specific condition; and (b) performing oxidation, esterification and cyclization sequentially under a specific condition.

La présente invention concerne un procédé de préparation de (S)-3-hydroxy-.gamma.-butyrolactone optiquement pure exprimée par la formule (1) et plus particulièrement un procédé permettant de préparer une (S)-3-hydroxy-.gamma.-butyrolactone optiquement pure de façon économique en grandes quantités et consistant (a) à préparer un oligosaccharide à liaison .alpha.-(1,4) avec une distribution adéquate de sucre par réaction d'amylopectine facilement disponible à partir d'un produit naturel avec une enzyme dans une condition spécifique, et (b) à procéder à une oxydation, une estérification et une cyclisation de façon séquentielle dans une condition spécifique.

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