Organic Chemistry III
Professor Carl C. Wamser
1. (5 points) D-Lyxose is the aldopentose that differs from D-ribose at C2 and C3.
Write structures for D-lyxose in all of the following forms.
c) beta-pyranose (Haworth form)
d) beta-pyranose (two equilibrating chair forms)
2. (2 points) Write a disaccharide formed from
alpha-D-ribopyranose alpha-1 joined to C-6 of beta-D-fructofuranose
3. (3 points) Complete the following reactions by adding the appropriate structures as requested.