The conversion of phenol to salicylic acid can be accomplished by
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The Reimer-Tiemann reaction is a useful method for introducing a formyl group (-CHO) to the aromatic ring, which can then be oxidized to a carboxyl group.
The conversion of phenol to salicylic acid is typically achieved by the Reimer-Tiemann reaction, where phenol undergoes electrophilic substitution in the presence of chloroform and a base (usually sodium hydroxide) to form salicylic acid.