1. When D-glucose is treated with sodium borohydride, optically active glucitol results. When optically active D-galactose is reduced, however, the product is optically inactive. Explain this loss of optical activity.
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2. Draw the expected product of the reaction of the following sugars with methyl iodide and silver oxide.
(a) α-D-fructofuranose (b) , β -D-galactopyranose
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3. The mechanism of glycoside formation is the same as the second part of the mechanism for acetal formation. Propose a mechanism for the formation of methyl f3 -D-glucopyranoside.
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