Chapter 24.18, Problem 23P

Interpretation Introduction

Interpretation:

The structure of the $\text{β-pyranose}$ form of $\text{D-glucuronic acid}$ is to be drawn.

Concept introduction:

A pyranose is a six-membered ring form of a monosaccharide.

For the $\text{D}$ series of carbohydrates, if the hydroxyl group at anomeric carbon is down, the configuration at that carbon is $\text{α}$, and if the hydroxyl group is up, the configuration at anomeric carbon is $\text{β}$.

The ${\text{CH}}_{\text{2}}\text{OH}$ group of monosaccharides (Aldose) oxidizes to carboxylic group and forms uronic acid.

The anomeric carbon which is aldehyde carbon in the noncyclic form does not oxidize along with ${\text{CH}}_{\text{2}}\text{OH}$ in $\text{β-pyranose}$.