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27 a) Mannobiose is a disaccharide of two units of D-mannose, shown below. Mannobiose consists of...
27. a) Mannobiose is a disaccharide of two units of D-mannose,
shown below. Mannobiose consists of a a(1®6) linkage. Draw the
structure of mannobiose.
b) Prepare the following compound from the starting material given
and any necessary organic and/or inorganic reagents:
from benzene and 1-propanol as the only source of carbon.
27. a) Mannobiose is a disaccharide of two units of D-mannose, shown below. Mannobiose consists of a a(1-6) linkage. Draw the structure of mannobiose. CHO НО. H HO -H...
CARBOHYDRATES POST-LAB QUESTIONS [52] 19. Review the Fischer structures of D-galactose, D-glucose, and D-mannose Identify each structure. [12 pts) CHO CHO CHO Н. -OH HO -H H -OH HO -H HO H HO -H Н. OH H OH HO -H H -OH H ОН Н. ОН CH2OH CH2OH CH2OH D-Glucose D-Mannose TD-Galactose 20. Would either D-galactose or D-mannose form an osazone identical to the glucose osazone? [5 pts] 21. Explain: [5 pts) [5 pts] 22. What structural feature do all...
Show the structure of a disaccharide in Haworth projection with two D-glucose units connected with a beta-1,4'-glucosidic-linkage. H H OH HO H H OH H OH CH2OH
b) Show how you would prepare the following molecule from
1-propanol, formaldehyde, and ethylamine as the only source of
carbon and nitrogen, using any necessary organic or
inorganic reagents.
b) Show how you would prepare the following molecule from 1-propanol, formaldehyde, and ethylamine as the only source of carbon and nitrogen, using any necessary organic or inorganic reagents. он H H NH2
Chemistry help please 3 easy
questions
3. Which are the correct configurations of the two chirality centers (stereocenters) in the following Fischer projection? CHO H HO ОН H CH2OH A. 2R, 3R B. 2R, 3S C. 2S, 3R D. 2S, 3S 4. When a sugar was treated with warm nitric acid it gave an optically active compound. Wohl degradation of the same sugar gave L-glyceraldehyde. The structure of the sugar is CHO -ОН H HO H CHO HO -H HO...
3) Draw the disaccharide that is formed when the following two mon joined by a B (1-3) glycosidic linkage. (2 pts) two monosaccharides are CH₂OH онон - он снон, 9 w OH 3 OH CH, OH OH OH OR 0 Y 4) Consider the disaccharide sophorose, a product of the caramelization of glucose, answer the following questions: CH,OH Мон OH ОН a) Classify the glycosidic linkage as a or B, and use the numbers to designate its location. (1 pt)...
23. a) Write a reasonable mechanism, using good curved arrow
notation, for the aldol condensation of propanal.
b) Show how you would prepare the following molecule from
1-propanol, formaldehyde, and ethylamine as the only source of
carbon and nitrogen, using any necessary organic or
inorganic reagents
23. a) Write a reasonable mechanism, using good curved arrow notation, for the aldol condensation of propanal. i H NaOH H2O heat b) Show how you would prepare the following molecule from 1-propanol, formaldehyde,...
6. (18 points total) Synthesis: Devise a synthesis of the following compound from the given starting materials. You may use any other organic or inorganic reagents you deem necessary but you must use the given starting materials as your only source of carbon in the final compound OH several steps OH MeOH HO
оо 15. HỌN _C02 1) (CH3)3COCOCOC(CH3)3 Ph 2) -N: C: NH- CHO HO+H PhNHNH | 16. H+OH (3 equiv.) н+он HOHH CH2OH 17. Use ANY needed reagents to effect the following transformation. (30 points) Br ÇO2Et ON starting material product
3:45 INFO Done Attachment H, Pt (excess) MY HO 2. Outline a synthesis starting from the compound below and any other organic/inorganic compounds. Fill in the missing reagents and compound. Los OH PBr3 COOH 3. Propose how you could make the following compounds starting with benzene and any other organic or inorganic compounds.