Question

Gabriel?s phthalimide synthesis can be used to prepare

• A. ethanamine
• B. N-methylmethanamine
• C. benzeneamine
• D. N,N-dimethylmethanamine

Answer 1

Answer: (A)

ethanamine

Answer 2

Only aliphatic primary $\left(1^{\circ}\right)$ amines (amines having the formula $R- NH _{2}$ where $R \neq C _{6} H _{5}$ ) are synthesised by Gabriel's phthalimide synthesis.

The structures of the given compounds are as follows.

(a) $C _{2} H _{5} NH _{2}$ ethanamine. $\left(1^{\circ}\right.$ amine)

(b) $CH_3NHCH_3 \,N$ -methylmethanamine ($2^{\circ}$amine)

Thus, only ethanamine can be obtained from Gabriel's phthalimide synthesis among the given compounds.