Chapter 18, Problem 18.113EP

(a)

Interpretation Introduction

Interpretation: The structure for $\alpha$-D-glucosamine has to be drawn.

Concept introduction: In a monosaccharide, the replacement of one of the hydroxyl groups with an amino group results in the formation of an amino sugar.  In naturally occurring amino sugars, the hydroxyl group of carbon 2 is replaced by an amino group.

(b)

Interpretation Introduction

Interpretation: The structure for N-acetyl-$\alpha$-D-glucosamine has to be drawn.

Concept introduction: In a monosaccharide, the replacement of one of the hydroxyl groups with an amino group results in the formation of an amino sugar.  In naturally occurring amino sugars, the hydroxyl group of carbon 2 is replaced by an amino group. N-acetyl-$\alpha$-D-glucosamine is the acetyl derivative of D-glucosamine.