A-LevelChemistryOrganic synthesis9701/12 · May/June 2021 · Q211 Mark

Hexadeca-10,12-dien-1-ol is produced by silk moths from hexadecanoic acid in a three-step enzymic process. [Reaction scheme from hexadecanoic acid to hexadeca-10,12-dien-1-ol] Which row contains correct descriptions of the three steps?

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Astep 1: elimination, step 2: elimination, step 3: dehydration

Bstep 1: elimination, step 2: reduction, step 3: reduction

Cstep 1: oxidation, step 2: elimination, step 3: oxidation

Dstep 1: oxidation, step 2: oxidation, step 3: reduction

✓ Correct answer

D: step 1: oxidation, step 2: oxidation, step 3: reduction

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Topic: Organic synthesis, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2021 Paper 1 Variant 2, question 21.

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