Chloroform, when treated with a primary amine in presence of $ NaOH $ , gives a bad-smelling compound isocyanide. The reaction is known as carbyl-amine reaction. $ \underset{\begin{smallmatrix} \text{Primary} \\ \,\,\,\text{amine} \end{smallmatrix}}{\mathop{R-N{{H}_{2}}}}\,+CHC{{l}_{3}}+3KOH\xrightarrow{{}} $ $ \underset{\begin{smallmatrix} \,\,\,\,\,\,\,Alkyl \\ isocyanide \end{smallmatrix}}{\mathop{R-NC}}\,\,\,+3KCl+3{{H}_{2}}O $