in which of the following reaction, Amine is obtained as a product.

Options

A. `CH_(3)-overset(O)overset(||)C-NH_(2) overset(Br_(2)+KOH)to `
B. `CH_(3)-overset(O)overset(||)C-Cl underset((ii)H_(2)O)overset((i) NaN_(3))to`
C. `CH_(3)-overset(O)overset(||)C-OH underset((ii) H_(2)O)overset((i)N_(3)H//H^(+)) to `
D. `CH_(3)-overset(O)overset(||)C-NH-OH underset((ii)H_(2)O) overset((i)H^(+))to `

Answer

To determine in which of the given reactions amines are obtained as products, we will analyze each reaction step by step.

### Step-by-Step Solution:

1. **First Reaction:**
- We start with ethanamide (CH3CONH2).
- When ethanamide is treated with bromine (Br2) in the presence of a base (OH-), the nitrogen atom attacks the bromine, leading to the formation of a nitrene intermediate.
- This nitrene undergoes rearrangement to form isocyanate (CH3N=C=O).
- When isocyanate is reacted with water, it forms carbamic acid (CH3NHCOOH).
- Upon heating, carbamic acid decomposes to release carbon dioxide (CO2) and yields methylamine (CH3NH2).
- **Conclusion:** The first reaction produces an amine.

2. **Second Reaction:**
- The starting compound is acetyl chloride (CH3COCl).
- It reacts with sodium azide (NaN3), which acts as a nucleophile, substituting the chlorine atom and forming acyl azide (CH3CON3).
- Upon heating, acyl azide decomposes to form a nitrene.
- This nitrene again rearranges to form isocyanate.
- The isocyanate reacts with water to form carbamic acid, which upon heating releases CO2 and yields methylamine.
- **Conclusion:** The second reaction also produces an amine.

3. **Third Reaction:**
- The starting compound is acetic acid (CH3COOH).
- When acetic acid reacts with sodium azide (NaN3), it undergoes nucleophilic substitution, leading to the formation of acyl azide.
- Heating this compound leads to the formation of a nitrene.
- As before, the nitrene rearranges to form isocyanate, which then reacts with water to produce carbamic acid.
- The heating of carbamic acid releases CO2 and yields methylamine.
- **Conclusion:** The third reaction produces an amine as well.

4. **Fourth Reaction:**
- The starting compound is a compound with both an amine and hydroxyl group (likely a hydroxyamide).
- In the presence of acid (H+), the lone pairs on nitrogen and oxygen facilitate the formation of a nitrene.
- This nitrene undergoes rearrangement to form isocyanate.
- The isocyanate reacts with water to form carbamic acid, which upon heating releases CO2 and yields an amine.
- **Conclusion:** The fourth reaction also produces an amine.

### Final Answer:
All four reactions yield amines as products.

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