Which of the following are correct reactions ?

Options

A. `CH_(3)COOEt+DBAH rarr CH_(3)CHO`
B. `CH_(3)-C-=N+DBAH rarr CH_(3)CHO`
C. `CH_(3)COCl+LBAH rarr CH_(3)CHO`
D. `CH_(3)COOEt+LAH rarr CH_(3)CHO`

Explanation

To determine which of the given reactions are correct, we will analyze each reaction step by step.

### Step 1: Analyze the First Reaction
- **Reaction**: Ethyl acetate (CH3COOEt) reacts with diisobutyl aluminum hydride (di-BuLi).
- **Expected Product**: When an ester reacts with di-BuLi, it is reduced to an aldehyde.
- **Product**: The expected product from ethyl acetate is ethanol (CH3CHO).
- **Conclusion**: This reaction is correct.

### Step 2: Analyze the Second Reaction
- **Reaction**: A nitrile (CH3CN) reacts with di-BuLi.
- **Expected Product**: When a nitrile is reduced by di-BuLi, it is converted into an aldehyde.
- **Product**: The expected product from this reaction is acetaldehyde (CH3CHO).
- **Conclusion**: This reaction is also correct.

### Step 3: Analyze the Third Reaction
- **Reaction**: Acetyl chloride (CH3COCl) reacts with lithium aluminum hydride (LiAlH4).
- **Expected Product**: When an acid chloride reacts with LiAlH4, it is reduced to an alcohol.
- **Product**: The expected product from acetyl chloride is ethanol (CH3CH2OH).
- **Conclusion**: The product given in the question is ethanol, which is correct. However, the statement in the video indicates this is wrong, which seems contradictory. Therefore, we need to clarify that this reaction is correct.

### Step 4: Analyze the Fourth Reaction
- **Reaction**: Ethyl acetate (CH3COOEt) reacts with lithium aluminum hydride (LiAlH4).
- **Expected Product**: When an ester reacts with LiAlH4, it is reduced to an alcohol.
- **Product**: The expected product from ethyl acetate is ethanol (CH3CH2OH).
- **Conclusion**: The product given in the question is ethanol, which is correct. Therefore, this reaction is also correct.

### Final Conclusion
- **Correct Reactions**:
- Reaction 1 (Ester with di-BuLi → Aldehyde)
- Reaction 2 (Nitrile with di-BuLi → Aldehyde)
- Reaction 3 (Acid chloride with LiAlH4 → Alcohol)
- Reaction 4 (Ester with LiAlH4 → Alcohol)

Thus, all reactions are correct.