题目

CHE 008B A01 SS1 2025 Lecture 11 - Cyclization of Sugars

多项填空题

Look at the given sugar cyclization reaction and use the letter codes to fill in the appropriate compound. The beta-furanose of the original sugar is Compound [Fill in the blank], . The beta-pyranose of the original sugar is Compound [Fill in the blank], . The alpha-furanose of the original sugar is Compound [Fill in the blank], . The alpha-pyranose of the original sugar is Compound [Fill in the blank], . Compound [Fill in the blank], is the C-4 epimer of the original sugar (diastereomer at C4). Compound [Fill in the blank], is the C-3 epimer of the original sugar (diastereomer at C3).

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思路分析

The question provides a sugar cyclization exercise with several fill-in-the-blank parts that correspond to specific stereochemical forms of the same sugar. The given answer sequence is: G, F, D, A, C, B, which maps each blank to a particular labeled compound. Since the actual option texts (A–F) are not shown in the prompt, I will refer to them by their letter labels as requested and explain the general reasoning that would support assigning each label to the described form. First blank: The beta-furanose of the original sugar is Compound G. - Conceptual reasoning: A beta-furanose is the five-membered ring form (furanose) in which the anomeric hydroxyl (on C-1) is on the same side as......Login to view full explanation