What is the role of pyridine in the acelation reaction of amines?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Reaction**: The acetylation of amines involves the reaction of an amine (like aniline) with an acylating agent (such as an acid chloride or acetic anhydride) to form an acetylated product (like acetanilide).

2. **Identifying the Role of Pyridine**: Pyridine is used in this reaction primarily as a base. Its structure is similar to benzene but contains a nitrogen atom, which gives it basic properties.

3. **Formation of By-products**: During the acetylation reaction, a side product, hydrochloric acid (HCl), is generated. This occurs when the acid chloride reacts with the amine.

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