JEE MainChemistryAmines
Consider the following reaction sequence: Benzyl chloride KCN A LiAlH ₄ B CHCl ₃, KOH , C The major product C is:
Options
- ANo reaction occurs in the last step
- BBenzyl isocyanide
- C2-Phenylethyl isocyanide
- D2-Phenylethyl cyanide
Correct answer
C. 2-Phenylethyl isocyanide
Step-by-step solution
Step 1: Benzyl chloride reacts with KCN to undergo nucleophilic substitution, forming benzyl cyanide (phenylacetonitrile) as product A. C ₆ H ₅ CH ₂ Cl + KCN C ₆ H ₅ CH ₂ CN (A) Step 2: Reduction of benzyl cyanide with LiAlH ₄ yields a primary amine, 2-phenylethanamine, as product B. C ₆ H ₅ CH ₂ CN LiAlH ₄ C ₆ H ₅ CH ₂ CH ₂ NH ₂ (B) Step 3: 2-Phenylethanamine is a primary amine, which undergoes the carbylamine reaction when treated with chloroform and KOH, forming 2-phenylethyl isocyanide as the major product C. C