Organic Chemistry 354 Quiz - December 1, 1999

Dr. Sundin

1. Optically active aldopentose A was strongly oxidized with nitric acid to give optically active 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 D-glyceraldehyde. Answer

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

3. Consider the following disaccharide.

a. Is this "disaccharide" a reducing sugar? Answer

b. Is the "hexose" portion of this "disaccharide" an aldose or ketose? Answer

c. Is the "pentose" portion of this "disaccharide" an aldose or ketose? Answer

d. Is either the "pentose" or the "hexose" portion of this "disaccharide" a deoxy monosaccharide? Answer

| Chemistry Home | Dr. Sundin Home | Chemistry 354 | Sample Exams and Quizzes | sundin@uwplatt.edu |