Question

Predict the major product.

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

The reaction proceeds mainly in three steps.
Step 1: Addition of Mg metal (in dry ether) to the given alkyl bromide produces grignard reagent having $2^o$ carbanion.

Step 2: Rearrangement of $2^o$ carbanion through opening of cyclopropane ring to generate $1^o$ carbanion.

Step 3: Abstraction of proton from water molecule.