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Diazomethane is capable of transferring a methyl group to certain functional groups. Compound IV contains an enolic —OH group, so it can undergo methylation by CH₂N₂. Which of the following is correct?

1. Diazomethane transfers a methyl group to acidic functional groups.
2. Diazomethane transfers a methyl group to enolic —OH groups.
3. Diazomethane transfers a methyl group to both acidic and enolic —OH groups.
4. None of these statements are correct.

Correct answer: Diazomethane transfers a methyl group to enolic —OH groups.

Solution

Diazomethane is capable of transferring a methyl group to certain functional groups, and since compound IV contains an enolic —OH group, it can undergo methylation by CH2N2, making option B the correct choice.

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