Would it be possible to convert camphor (2) to isoborneol (1)? If so, what type of reaction would this be and what reagent will you use?
The correct answer and explanation is :
Yes, it is possible to convert camphor (2) to isoborneol (1). This transformation is a reduction reaction.
🔁 Reaction Type:
Reduction of a ketone (camphor) to a secondary alcohol (isoborneol).
🧪 Reagents Used:
A selective reducing agent is used for this reaction. Two common options:
- Sodium borohydride (NaBH₄) — the most typical reagent for this reaction.
- Alternatively, LiAlH₄ (lithium aluminum hydride) can reduce camphor, but NaBH₄ is preferred due to better control and selectivity.
⚗️ Details of the Reaction:
Camphor is a bicyclic ketone. When it is reduced by NaBH₄, the carbonyl group is converted to an alcohol. There are two possible stereoisomers of the resulting alcohol:
- Isoborneol (exo-alcohol): Major product due to steric effects — this is where the hydroxyl group adds on the less hindered face.
- Borneol (endo-alcohol): Minor product.
The preference for isoborneol formation comes from steric hindrance during hydride attack — NaBH₄ delivers hydride from the less hindered exo face.
🧬 Summary:
- Yes, camphor can be converted to isoborneol.
- Reaction Type: Reduction.
- Reagent: Sodium borohydride (NaBH₄) in a solvent like ethanol or methanol.
- Product Preference: Isoborneol is favored due to stereoselectivity.