The reaction of aliphatic and aromatic primary amines with chloroform in the presence of ethanolic potassium hydroxide to produce compound with fouling smell, is known as
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Carbylamine reaction
Primary amines when heated with chloroform ($CHCl_3$) and alcoholic KOH produce isocyanides (carbylamines), which have a very foul smell.
General reaction:
$R-NH_2+ CHCl_3 + 3KOH → R-NC + 3KCl + 3H_2O$
This reaction is used as a test for primary amines and is known as the Carbylamine reaction.
Option 1: Rosenmund reaction
Used for conversion of acid chloride to aldehyde using $Pd/BaSO_4$. Not related to amines.
Option 2: Carbylamine reaction
Primary amines react with $CHCl_3$ and alcoholic KOH to give isocyanides with foul smell. Correct.
Option 3: Fittig reaction
Coupling of aryl halides using sodium in dry ether. Not related to amines.
Option 4: Etard reaction
Oxidation of toluene to benzaldehyde using chromyl chloride. Not related to amines.
