The reaction , `RNH_2+CHCl_3+underset(("Ethanolic"))(3KOH)rarrR-overset(+)N-=overset(-)C+ 3KCl+3H_2O` is called

Options

A. Cope reaction
B. Curtius reaction
C. Hoffmann - brmamide reaction
D. Carbylamine reaction

Answer

To solve the question regarding the reaction of primary amine with chloroform and potassium hydroxide, we will analyze the reaction step by step.

### Step-by-Step Solution:

1. **Identify the Reactants**:
The reactants in the given reaction are:
- RNH₂ (a primary amine)
- CHCl₃ (chloroform)
- 3 KOH (potassium hydroxide)

2. **Understand the Reaction Conditions**:
The reaction is carried out in ethanolic conditions, which means that ethanol is the solvent used. This can influence the reaction pathway.

3. **Recognize the Products**:
The products of the reaction are:
- RNC (alkyl isocyanide)
- 3 KCl (potassium chloride)
- 3 H₂O (water)

4. **Determine the Type of Reaction**:
The reaction involves the formation of an isocyanide from a primary amine. This transformation is characteristic of a specific type of reaction known as the carbylamine reaction.

5. **Final Conclusion**:
Based on the analysis, the reaction of a primary amine with chloroform and potassium hydroxide leading to the formation of an isocyanide is called the **carbylamine reaction**.

### Final Answer:
The reaction is called the **carbylamine reaction**.

---