Question

3. Given the chemical information below, determine the structure of the saccharide i. It is a non-reducing sugar, and does not undergo mutarotation. ii. Upon acidic hydrolysis, one mole each of (D)-mannose, (L)-galactose, (D)-xylose, and (D) threitol (the alditol formed from threose) are produced. iii. Upon exhaustive methylation with dimethylsulfate and hydroxide, followed by acidic hydrolysis, 2,4-di-O-methyl-(D)-mannose, 2,3,4,6-tetra-O-methyl-(L)-galactose, 2,3,4-tri-o methyl-(D)-xylose, and 1,2,3-tri-O-methyl-(D)-threitol are formed iv. When all o-glycosidic linkages are enzymatically hydrolyzed, (L)-galactose, (D)-threitol, and a reducing disaccharide are formed v. When the reducing disaccharide formed above is oxidized by Br/H20, methylated with dimethylsulfate in basic water, then hydrolyzed by acidic water, it forms 2,3,4,5-tetra-O- methyl-(D)-mannonic acid and 2,3,4-tri-O-methyl-(D)-xylose

Answer 1

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CHD CH 아! Нон) (C H10H uose aua) locindi cates monic eid A Hede has gKoup n aomau Carbon

Peker tmkoge c-Im kage DM D Xylose L-3 aledi双 oH CHHD to pH 1 o-i tho 0 버 OHt Mannese Xylose galactose tbwease eMuese