\[\ce{\underset{\text{Acetonitrile}}{CH3 – C ≡ N} + 4[H] ->[Na/Ethanol] \underset{\text{Ethanamine}}{CH3 – CH2 – NH2}}\]

\[\ce{\underset{\text{Nitroethane}}{CH3 – CH2 – NO2} ->[LiAlH4/ether]\underset{\text{Ethanamine}}{CH3 – CH2 – NH2}}\]

\[\begin{array}{cc}\\ \ce{O}\phantom{………………………………………………….}\\ ||\phantom{………………………………………………….}\\ \ce{\underset{\text{Propionamide}}{CH3 – CH2 – C – NH2} + Br2 – 4KOH ->[\Delta] \underset{\text{Ethanamine}}{CH3 – CH2 – NH2} + K2CO3 + 2KBr + 2H2O}\\ \phantom{………….} \end{array}\]