Propan-2-ol to 2-methylpropan-2-ol.

Explanation

To convert propan-2-ol to 2-methylpropan-2-ol, we can follow these steps:

### Step 1: Oxidation of Propan-2-ol
- **Reagent**: Use a mild oxidizing agent such as Pyridinium chlorochromate (PCC).
- **Reaction**: Propan-2-ol (a secondary alcohol) is oxidized to acetone (a ketone).

**Chemical Reaction**:
\[ \text{Propan-2-ol} \xrightarrow{\text{PCC}} \text{Acetone} \]
...