Compound A, C5H10O5, given a tetraacetate with Ac2O and oxidation of A with Br2-H2O gives an acid, C5H10O6. Reduction…
Biomolecules · Class 12 · JEE Main Previous Year Question
Compound , given a tetraacetate with and oxidation of with gives an acid, . Reduction of with gives isopentane. The possible structure of is:
- a✓
Option a
- b
Option b
- c
Option c
- d
Option d
Option a
Step 1: Chain Structure — Since reduction with gives isopentane (a branched five-carbon alkane), the carbohydrate must have a branched carbon skeleton.
Step 2: Identification — The formation of a tetraacetate and an aldopentose structure confirms it has four groups and one group.
Step 3: Selection — Structure (a) matches the isopentyl arrangement and the functional groups described.
Key Point: reduction is a powerful tool to identify the carbon backbone of sugars.
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