Patent ID: 7304148
Filing Date: 2007-12-04
Classification: C08B,C12P

Abstract:
1. A process for preparing an asparagine-linked α2,3-monosialooligosaccharide derivative having nonasaccharide and represented by the formula (14) given below, wherein one of R 1 and R 2 is a group represented by the formula (2), wherein R, R′ and R″ are in the following combinations (a) R═F, R′═OH, R″═OH, (b) R═OH, R′═F, R″═OH, (c) R═OH, R′═OH, R″═F, and (d) R═OH, R′═OH, R″═OH, and the other thereof is a group represented by the formula (4), the process being characterized by hydrolyzing an asparagine-linked monosialooligosaccharide derivative represented by the formula (13) using a galactosidase wherein one of R 1 and R 2 is a group represented by the formula (2), and the other is represented by formula (3),