Which of the following amines undergo acylation reaction ?

Options

A. `CH_(3)CH_(2)NH_(2)`
B. `C_(6)H_(5)NH_(2)`
C. `(CH_(3)CH_(2))_(2)NH`
D. `(CH_(3))_(3)N`

Answer

To determine which amines undergo acylation reactions, we need to analyze the structure of the amines provided in the options and understand the requirements for acylation.

### Step 1: Understand Acylation Reaction
Acylation is a reaction where an acyl group (R-C=O) is introduced into an amine. The nitrogen atom in the amine acts as a nucleophile and attacks the electrophilic carbon of the acyl group. For this reaction to occur, the nitrogen must have at least one hydrogen atom available for the reaction.

### Step 2: Identify the Structure of Amines
Let's denote the amines as follows:
- Option A: R1-NH2 (primary amine)
- Option B: R2-NH (secondary amine)
- Option C: R3-N (tertiary amine)
- Option D: R4-NH2 (another primary amine)

### Step 3: Analyze Each Option
1. **Option A (R1-NH2)**: This is a primary amine with two hydrogen atoms on nitrogen. It can undergo acylation.
2. **Option B (R2-NH)**: This is a secondary amine with one hydrogen atom on nitrogen. It can also undergo acylation.
3. **Option C (R3-N)**: This is a tertiary amine with no hydrogen atoms on nitrogen. It cannot undergo acylation because there are no hydrogen atoms available for the reaction.
4. **Option D (R4-NH2)**: This is another primary amine with two hydrogen atoms on nitrogen. It can undergo acylation.

### Step 4: Conclusion
Based on the analysis:
- **Amines that undergo acylation**: Option A (R1-NH2), Option B (R2-NH), and Option D (R4-NH2).
- **Amine that does not undergo acylation**: Option C (R3-N).

### Final Answer
The amines that undergo acylation reactions are **Option A, Option B, and Option D**.

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