How will you convert acetaldehyde into the following compounds ?
Butan-1-ol

Explanation

To convert acetaldehyde (CH3CHO) into butan-1-ol (C4H10O), we can follow these steps:

### Step 1: Formation of Ethanol from Acetaldehyde
1. **Reagent**: Use a Grignard reagent, specifically ethylmagnesium bromide (C2H5MgBr).
2. **Reaction**: The Grignard reagent acts as a nucleophile and attacks the carbonyl carbon of acetaldehyde. This results in the formation of a tertiary alcohol intermediate.
- **Equation**:
\[
\text{CH}_3\text{CHO} + \text{C}_2\text{H}_5\text{MgBr} \rightarrow \text{CH}_3\text{CH(OH)C}_2\text{H}_5
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