Organic Chemistry 354 Quiz - November 30, 2000

Dr. Sundin

1. Optically active aldopentose A was oxidized with nitric acid to give optically inactive diacid B. Degradation of A gave optically active aldotetrose C. Degradation of C gave L-glyceraldehyde. Nitric acid oxidation of C gave optically active diacid D. Give Fischer projections of A, B, C, D, and L-glyceraldehyde. Answer

2. Encircle the acetal functional group(s) and draw a square around the hemiacetal functional group(s) in the molecule below. Answer

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