CHEM 313 Chapter Notes -Wohl Degradation, Cyanohydrin, Specific Rotation
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E) convert the reeves projection into a closed fischer projection. Fill in the fischer projection for l-glucose and draw its cyclic form in a chair projection: draw the fischer projection for beta-l-glucofuranose and its respective beta-furan. Provide the structure of the product of the following reactions: Show the steps and products of the kiliani-fischer procedure, starting from. Problem 4. alpha-d-mannose has a specific rotation of +29. 3 . beta-d-mannose has a specific rotation of -17. 0 . Over time, a sample of either the alpha or beta anomer in water will have a specific rotation of +14. 5 . Write a mechanism to explain what is happening. The wohl degradation of carbohydrates works in an opposite fashion to the. Instead of lengthening the chain of hexoses/pentoses ect. , it serves to shorten the chain. One step in the synthesis involves the addition of acetic anhydride to a preformed hydroxylammonium ion, under basic conditions, to produce the cyanohydrin.
