$CH_3CH_2C \equiv N \,+$ ઈથેનોલ $+ \,H_2O$ સાંદ્ર
(Figure) $\xrightarrow[FeB{{r}_{3}}]{B{{r}_{2}}}B\xrightarrow{Sn\,/\,HCl}C$ $\xrightarrow[HCl]{NaN{{O}_{2}}}D\xrightarrow[HBr]{CuBr}E$
$\begin{gathered} {C_2}{H_5}MgBr\,\,\xrightarrow{{ClCN}}\,\mathop {{C_2}{H_5}}\limits_{(a)} CN\,\xrightarrow{{{H_3}O{\,^ + }}}\,\,B \hfill \\ C{H_3}COC{H_3}\,\mathop {\xrightarrow[{NaOH}]{}}\limits^{{I_2}} \,X\,\,\mathop + \limits_{} \,\,CH{I_3}\,\mathop {\xrightarrow{{Ag}}}\limits_{} \,\,\,Y\, \hfill \\ \,{C_6}{H_5}N{H_2}\,\,\mathop {\xrightarrow[{HCL}]{}}\limits^{NaN{O_2}} \,\,P\,\,\,\xrightarrow{{CuCN}}\,\,Q\,\,\,\xrightarrow{{ + 4H}}\,\,R \hfill \\ \end{gathered} $