Chapter 20.3, Problem 20.8P

Interpretation Introduction

Interpretation:

The cyclic structure of D-idose has to be converted into Fischer projection structure.

Concept Introduction:

• Haworth projection is used to represent sugars in their cyclic forms.
• Conversion of Haworth projection to Fischer projection for aldohexose,
• Break the bond between oxygen of anomeric carbon $C1$ and $C5$ carbon.
• Make $C1$ as carbonyl group.
• Add $–OH$ group on right side of $C5$ carbon for D-sugars.
• The down side and upward $–OH$ groups of chiral carbons in Haworth projection are drawn as right side and left side in Fisher projection respectively.