β-Glucosidase Catalyzed Syntheses of Pyridoxine Glycosides
作者:Rajachristu Einstein CHARLES、Soundar DIVAKAR
DOI:10.1271/bbb.80463
日期:2009.1.23
Enzymatic syntheses of pyridoxine glycosides were carried out in di-isopropyl ether organic medium using β-glucosidase isolated from sweet almond. Optimum conditions determined for the reaction with d-glucose were 40% (w/w d-glucose) β-glucosidase at 0.18 mm (1.8 ml) of pH 5 acetate buffer over a 72 h incubation period. Of 11 carbohydrates employed, β-glucosidase gave 7-O-(α-d-glucopyranosyl)pyridoxine 5a, 7-O-(β-d-glucopyranosyl)pyridoxine 5b, 6-O-(α-d-glucopyranosyl)pyridoxine 5c, 7-O-(α-d-galactopyranosyl)pyridoxine 6a, 7-O-(β-d-galactopyranosyl)pyridoxine 6b, 6-O-(α-d-galactopyranosyl)pyridoxine 6c, 7-O-(α-d-mannopyranosyl)pyridoxine 7a, 7-O-(β-d-mannopyranosyl)pyridoxine 7b, and 6-O-(α-d-mannopyranosyl)pyridoxine 7c in yields ranging from 23 to 40%.