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Question

(A) The isocyanide test (carbylamine reaction) is given only by primary amines ($R-NH_2$ or $Ar-NH_2$).In reaction $(A)$,benzamide $(C_6H_5CONH_2)$ is

Vedclass · Accepted Answer

$C_6H_5CONH_2 \xrightarrow{LiAlH_4} C_6H_5CH_2NH_2$

Vedclass · Answer

(A) The isocyanide test (carbylamine reaction) is given only by primary amines ($R-NH_2$ or $Ar-NH_2$).In reaction $(A)$,benzamide $(C_6H_5CONH_2)$ is reduced by $LiAlH_4$ to benzylamine $(C_6H_5CH_2NH_2)$,which is a primary amine and gives a positive isocyanide test.In reaction $(B)$,$NaBH_4$ does not reduce amides.In reaction $(C)$,$N$-acetylaniline $(C_6H_5NHCOCH_3)$ is reduced to $N$-ethylaniline $(C_6H_5NHCH_2CH_3)$,which is a secondary amine and does not give the isocyanide test.In reaction $(D)$,$NaBH_4$ does not reduce amides.

Find out the reaction in which the obtained product gives a positive isocyanide test.

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