Do the following conversion. ( Try to minimize the steps involved )
2-butanol to 2-methylbutanoic acid

Explanation

To convert 2-butanol to 2-methylbutanoic acid, we can follow these steps:

### Step 1: Convert 2-butanol to 2-bromobutane
- **Reaction**: Treat 2-butanol (CH3-CH(OH)-CH2-CH3) with phosphorus pentachloride (PCl5).
- **Mechanism**: PCl5 will convert the alcohol (-OH) group into a bromine (-Br) leaving group, resulting in the formation of 2-bromobutane (CH3-CH(Br)-CH2-CH3).

### Step 2: Prepare the Grignard Reagent
- **Reaction**: React 2-bromobutane with magnesium (Mg) in dry ether.
...