Question

A molecule (P) on treatment with acid undergoes rearrangement and gives (Q). (Q) on ozonolysis followed by reflux under alkaline condition gives (R). The structure of (R) is given below. The structure of (P) is: 

• A.
• B.
• C.
• D.

Hint:

In ozonolysis reactions, identify the possible cleavage sites and backtrack to the most probable structure that would result in the given products under the specified conditions.

Answer 1

The Correct Option is A

The structure (R) is a cleavage product indicative of the original molecule (P) having specific structural features that, when rearranged and ozonized, lead to the ketone and methyl groups in the positions shown in (R). Structure 1 best fits this transformation sequence.