Abstract
Enzymatic synthesis of α-glucosyl-sucrose through the transglucosidase action of immobilized buckwheat α-glucosidase was attempted in a reaction system containing maltose and sucrose. Three kinds of nonreducing trisaccharides were produced, and a large portion of the trisaccharide was 4G-α-d-glucosyl-sucrose (erlose). Another was a new trisaccharide, O-α-d-glucopyranosyl-(l → 3)-O-α-d-glucopyranosyl-(l → 2)-O-d-fructofuranoside (3G-α-d-glucosyl-sucrose; [α]d+120°, in water), and the other was 6G-α-d-glucosyl-sucrose (theanderose; [α]d+107°, in water). The new trisaccharide was named “esculose.”
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