ASCORBATE DERIVATIVES HAVING STRONG ANTIOXIDATIVE EFFECT AND HIGHER STABILITY AND PREPARATION METHOD THEREOF

摘要

PURPOSE: Ascorbate derivatives having strong antioxidative effect and higher stability and a preparation method thereof are provided, thereby high quality of ascorbate derivatives can be prepared. CONSTITUTION: The ascorbate derivatives, α-1,6-maltosyl ascorbate, having strong antioxidative effect and higher stability is represented by the formula(1). The method for preparing the α-1,6-maltosyl ascorbate comprises converting maltose to asborbate by glycosyl-transferring amylase, wherein the glycosyl-transferring amylase is selected from the group consisting of Bacillus stearothermophillus amylase(BSMA), Bacillus licheniformis amylase and Thermus sp. amylase(ThMA); and the maltose is prepared from a substrate selected from starch, maltotriose and maltodextrin by the glycosyl-transferring amylase.