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Salicylic acid: spot the wrong reaction class

Single question

One-step carboxylation of phenol to salicylic acid. The atoms and the bond being formed are right. Look at the reaction class label and the reagents the step claims to use.

Kolbe-Schmitt carboxylation
Phenoxide chemistry vs Friedel-Crafts on phenol
CO2 reactivity under different activations

Find the flaw

Click the step that contains the flaw, or pick “No flaw” if you think every step is correct.

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