TOPIC: 22. Carbohydrates

SUBTOPIC: 220. Monosaccharides

1. Which is the most stable and which is the least stable aldohexose?

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2. Draw the β-pyranose form of the following aldohexose derivative in Haworth and most stable chair conformation.

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3. The following sugar derivative is written in Haworth projection. Draw a Fischer projection of the open form of this compound.

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4. D-Allose is the aldohexose with all stereogenic centers having the R configuration. Draw a chair representation of β-D-allose showing all hydroxyl groups.

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5. Give the R,S configuration of each stereogenic center in the following Fischer projection. Is this a D or L sugar?

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