Question:
What is the major product Y in the following reaction sequence?
What is the major product Y in the following reaction sequence?
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Carboxylic acid is a meta-directing group in electrophilic substitution; bromination with Br\(_2\)/FeBr\(_3\) adds Br at the meta position.
Updated On: Jun 6, 2025
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The Correct Option is A
Solution and Explanation
Step 1: The given reaction involves **protection of an amide group** using benzene sulfonyl chloride in the presence of pyridine, forming a sulfonamide intermediate.
Step 2: On hydrolysis, the intermediate converts back to the **corresponding acid**, benzoic acid.
Step 3: The benzoic acid then undergoes **electrophilic aromatic substitution** with Br\(_2\)/FeBr\(_3\), and bromine substitutes the meta-position due to the electron-withdrawing effect of the carboxylic group.
Step 4: Therefore, the final product Y is **3-bromobenzoic acid**.
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