Question:
Name the following reaction.
Name the following reaction.
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The scheme is the ortho carboxylation of sodium phenoxide with carbon dioxide under heat and pressure to give salicylic acid.
Updated On: Nov 12, 2026
- Kolbe reaction
- Reimer - Tiemann reaction
- Wolff reaction
- Clemmensen reaction
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
Sodium phenoxide is heated with carbon dioxide under pressure to give sodium salicylate. Acidification then gives salicylic acid (2-hydroxybenzoic acid).
Step 2: Identify the reaction
Introducing a carboxyl group ortho to the OH group of phenoxide using \(\text{CO}_2\) is the Kolbe (Kolbe-Schmitt) reaction.
Step 3: Compare the options
Reimer-Tiemann uses \(\text{CHCl}_3\)/NaOH to give salicylaldehyde. The Wolff-Kishner and Clemmensen reactions reduce a C=O group to \(\text{CH}_2\).
Final Answer:
The reaction is the Kolbe reaction. \[ \boxed{\text{(A) }\text{Kolbe reaction}} \]
Sodium phenoxide is heated with carbon dioxide under pressure to give sodium salicylate. Acidification then gives salicylic acid (2-hydroxybenzoic acid).
Step 2: Identify the reaction
Introducing a carboxyl group ortho to the OH group of phenoxide using \(\text{CO}_2\) is the Kolbe (Kolbe-Schmitt) reaction.
Step 3: Compare the options
Reimer-Tiemann uses \(\text{CHCl}_3\)/NaOH to give salicylaldehyde. The Wolff-Kishner and Clemmensen reactions reduce a C=O group to \(\text{CH}_2\).
Final Answer:
The reaction is the Kolbe reaction. \[ \boxed{\text{(A) }\text{Kolbe reaction}} \]
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