Heating D-altrose with dilute acid produces a nonreducing anhydro sugar (C6H1005). Methylation of the anhydro sugar followed by acid hydrolysis yields 2,3,4-tri-O-methyl-D-altrose. The formation of the anhydro sugar takes place through a chair conformation of ẞ- D-altropyranose in which the -CH2OH group is axial. What is the structure of the anhydro sugar? CH₁ OH HO OH CH3 H,C 0. Ο H H H H HO Он O OH H₂C 0. CH3 H H H H CH₂ -OH OH HO eTextbook and Media Explain how is it formed. The anhydro sugar is formed when the axial -CH2OH group reacts with C to form a cyclic SUPP Because the anhydro sugar is ✓ (i.e., an internal glycoside), it is a sugar. Methylation followed by acid hydrolysis converts the anhydro sugar to 2,3,4-tri-O-methyl-D-altrose.

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Heating D-altrose with dilute acid produces a nonreducing anhydro sugar (C6H1005). Methylation of the anhydro sugar followed by
acid hydrolysis yields 2,3,4-tri-O-methyl-D-altrose. The formation of the anhydro sugar takes place through a chair conformation of ẞ-
D-altropyranose in which the -CH2OH group is axial.
What is the structure of the anhydro sugar?
CH₁
OH
HO
OH
CH3
H,C 0.
Ο
H H
H
H
HO
Он
O
OH
H₂C
0.
CH3
H H
H
H
CH₂
-OH
OH
HO
eTextbook and Media
Explain how is it formed.
The anhydro sugar is formed when the axial -CH2OH group reacts with C
to form a cyclic
SUPP
Because the anhydro sugar is
✓ (i.e., an internal glycoside), it is a
sugar.
Methylation followed by acid hydrolysis converts the anhydro sugar to 2,3,4-tri-O-methyl-D-altrose.
Transcribed Image Text:Heating D-altrose with dilute acid produces a nonreducing anhydro sugar (C6H1005). Methylation of the anhydro sugar followed by acid hydrolysis yields 2,3,4-tri-O-methyl-D-altrose. The formation of the anhydro sugar takes place through a chair conformation of ẞ- D-altropyranose in which the -CH2OH group is axial. What is the structure of the anhydro sugar? CH₁ OH HO OH CH3 H,C 0. Ο H H H H HO Он O OH H₂C 0. CH3 H H H H CH₂ -OH OH HO eTextbook and Media Explain how is it formed. The anhydro sugar is formed when the axial -CH2OH group reacts with C to form a cyclic SUPP Because the anhydro sugar is ✓ (i.e., an internal glycoside), it is a sugar. Methylation followed by acid hydrolysis converts the anhydro sugar to 2,3,4-tri-O-methyl-D-altrose.
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