Question

When undergoes intramolecular aldol condensation, the major product formed is:

• A.
• B.
• C.
• D.

Hint:

Aldol condensations in the intramolecular form lead to the formation of cyclic products, often resulting in rings such as lactones or lactams depending on the structure of the reactants. Pay attention to the position of $\alpha$-hydrogens and the size of the cyclic product.

Answer 1

The Correct Option is C

In intramolecular aldol condensation, two molecules of the same compound react to form a cyclic product.
The compound given here contains a $\alpha$-hydrogen adjacent to a carbonyl group, making it a suitable candidate for the aldol reaction.
Upon condensation, the compound undergoes an intramolecular aldol reaction, leading to the formation of a six-membered cyclic $\beta$-lactone.
Option 3 is the correct structure, where the reaction forms a cyclic ester (lactone) as the major product.