Question

Identify the final product [Y] in the following reaction.

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Hint:

Etard reaction converts methyl group to aldehydeClaisen-Schmidt condensation forms \( \alpha,\beta \)-unsaturated ketones from aldehydes and ketones.

Answer 1

The Correct Option is D

Step 1: First reaction (Etard reaction).
The given compound is p-nitrotoluene.
Treatment with \( CrO_2Cl_2 \) in \( CS_2 \) followed by hydrolysis converts the methyl group into an aldehyde group.
Thus, intermediate [X] is p-nitrobenzaldehyde.

Step 2: Second reaction (Claisen-Schmidt condensation).
p-nitrobenzaldehyde reacts with acetophenone \( (C_6H_5COCH_3) \) in presence of base \( (OH^-) \).
This is an aldol condensation forming an \( \alpha,\beta \)-unsaturated ketone.

Step 3: Formation of product.
The product formed is a conjugated system:
\[ O_2N-C_6H_4-CH=CH-CO-C_6H_5 \]

Step 4: Match with options.
This corresponds to option (D).

Step 5: Conclusion.
Thus, the final product is:
\[ \boxed{\text{Option D}} \]