Do the following conversions: o-cresol to salicyclic acid

Explanation

To convert ortho-cresol to salicylic acid, we will follow these steps:

### Step 1: Identify the Structures
- **Ortho-Cresol**: It has a hydroxyl group (-OH) and a methyl group (-CH3) on adjacent carbon atoms in a benzene ring.
- **Salicylic Acid**: It has a hydroxyl group (-OH) and a carboxylic acid group (-COOH) on adjacent carbon atoms in a benzene ring.

### Step 2: Protect the Hydroxyl Group
To prevent the hydroxyl group from being oxidized during the reaction, we need to protect it. We can use **tosyl chloride (TsCl)** for this purpose.
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