c
$\mathrm{R}-\mathrm{X}+\mathrm{NH}_{3} \rightarrow \mathrm{R}-\mathrm{NH}_{2}$
${\text{RCH}} = {\text{NOH}}\xrightarrow[{Na\,/\,{C_2}H{O_4}}]{{[4H]}}RC{H_2}N{H_2}$
$R - C \equiv N + {H_2}O\xrightarrow{{{H^ \oplus }}}$ $\begin{array}{*{20}{c}}
{O\,\,\,} \\
{||\,\,\,\,} \\
{R - C - OH}
\end{array}$
$\begin{array}{*{20}{c}}
{O\,\,\,\,\,} \\
{||\,\,\,\,\,\,} \\
{R - C - N{H_2}}
\end{array}$ $ + \,[4H]\,\xrightarrow{{LiAl{H_4}}}$ $R - C{H_2} - NH{ _2}$