$CH_3CHO$ $ +$ $CH_3Mgl $ $\xrightarrow {\,\,\,\,}$ $X$ $\xrightarrow {H_2O/H^+}$ $Y$
\(\xrightarrow{{{H_2}O/{H^ + }}} \,\) \(\begin{array}{*{20}{c}}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \,\,\,{OH} \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, | \\
{C{H_3} - CH} \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,| \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{C{H_3}} \\
{(Y)}
\end{array} \,\,+ \,Mg < \begin{array}{*{20}{c}}
{OH} \\
I
\end{array}\)
$R - C \equiv N\xrightarrow[{(2)\,{H_2}O}]{{(1)\,AlH\,{{(i - Bu)}_2}}}$ ?