AIIMS 2019 Chemistry Reactions of Aldehydes and Ketones MCQ Question
Suitable reagent for following conversion
Correct Answer
Detailed Explanation
The conversion of 3-vinylbenzaldehyde to 3-(2-bromoethyl)benzoic acid requires a Grignard reagent like CH₃MgBr to form an alcohol intermediate, followed by acid workup with H₃O⁺ to yield the corresponding carboxylic acid. The reagents I₂/NaOH can facilitate the formation of the bromoethyl group through a haloform reaction, while H–Br/R₂O₂ is not suitable for this transformation as it does not effectively introduce the bromoethyl moiety in this context. Therefore, option A correctly identifies the necessary reagents for the synthesis pathway.
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