28. Carbohydrates

Draw the Haworth Projection that would be expected from cyclization of D-Fructose into α-D-Fructofuranose

Draw the following sugar in the α-pyranose form.

Draw the Haworth projection for the cyclic structure of D-mannose by laying down the Fischer projection.

Draw the following sugars using Haworth projections:

a. β-D-galactopyranose

Draw the following sugars using Haworth projections:

b. α-D-tagatopyranose

Using the Haworth projection, draw the furanose ring that would form between the C₅ hydroxyl group and the ketone at C₂ for the molecule shown.

Using the Haworth projection, draw the furanose ring that would form between the C₄ hydroxyl group and the aldehyde at C₁ for the molecule shown.

Draw the anomers of D-erythrofuranose.

Glucose is the most abundant monosaccharide. From memory, draw glucose in

(a) the Fischer projection of the open chain.

(b) the most stable chair conformation of the most stable pyranose anomer.

(c) the Haworth projection of the most stable pyranose anomer.

D-Glucose most often exists as a pyranose, but it can also exist as a furanose. Draw the Haworth projection of α-D-glucofuranose