| 简介 |
PROBLEM TO BE SOLVED : To provide a novel disaccharide containing a rare saccharide as a constituent monosaccharide; and its synthetic method. SOLUTION : The novel disaccharide containing a rare saccharide as a constituent monosaccharide is α-D-glucopyranosyl-(1→2)-β-D-psicofuranoside with a molecular weight of 342.30. The novel disaccharide is synthesized by using sucrose as a starting material and by the coupled reaction of sucrose phosphorylase with D-tagatose 3-epimerase in the presence of an inorganic phosphoric acid. Another synthetic method is also provided, by which the novel disaccharide is synthesized by causing sucrose phosphorylase to act on α-glucose-1-phosphoric acid and a ketohexose selected from rare saccharides. The ketohexose selected from rare saccharides is at least one ketohexose selected from the group consisting of D-psicose, D-tagatose, D-sorbose, L-fructose, L-psicose, L-tagatose, and L-sorbose. COPYRIGHT : (C)2007, JPO&INPIT |
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