20. Carbohydrates

D-Fructose can also form a six-membered ring. Draw the β anomer of D-fructose in the six-membered ring form.

Identify the following carbohydrates as the ⍺ or β anomer:

(a)

Draw the ⍺ and β anomer of D-talose in pyranose ring form:

Pentoses also exist in a ring form, but they most commonly occur as furanose rings. D-Ribose exists in its furanose ring form in the nucleic acid RNA. Using the structure of D-ribose from Table 6.1, draw the furanose form of β-D-ribose.

Identify the following carbohydrates as the ⍺ or β anomer:

(a)