Question

In a Claisen condensation reaction (when an ester is treated with a strong base)

• A. A proton is removed from the \( \alpha \)-carbon to form a resonance stabilized carbanion of the ester.
• B. Carbanion acts as a nucleophile in a nucleophilic acyl substitution reaction with another ester molecule.
• C. A new \( C-C \) bond is formed.
• D. All of the above statements are correct.

Hint:

Claisen condensation is a key reaction for the formation of carbon-carbon bonds in organic synthesis.

Answer 1

The Correct Option is D

Step 1: Understanding the Claisen condensation mechanism.
In a Claisen condensation, a strong base removes a proton from the \( \alpha \)-carbon of an ester. The resulting carbanion acts as a nucleophile and forms a new \( C-C \) bond with another ester molecule.

Step 2: Conclusion.
All the statements provided are correct, corresponding to option (4).