$C{H_3}C{H_2}OH\xrightarrow{{P + {I_2}}}A\xrightarrow[{ether}]{{Mg}} $ $B\xrightarrow{{HCHO}}C\xrightarrow{{{H_2}O}}D$
\((2)\) \(\left(C H_{3}\right)_{3}-C-O H \frac{20^{\prime \prime} \cdot H_{2} S O_{4}}{363 \,K}\) \(\left(C H_{3}\right)_{2}-C=C H_{2}+H_{2} O\)
$\left. \begin{gathered}
(A)\,\,\xrightarrow{{PB{r_3}}}\,(C)\,\xrightarrow{{Mg\,,\,ether}}Grignard\,\,reagent \hfill \\
(A)\,\,\xrightarrow[{{H_2}S{O_4}}]{{N{a_2}C{r_2}{O_7}}}\,(B) \hfill \\
\end{gathered} \right\}$ $ \to \,(D)\xrightarrow{{{H_3}{O^ \oplus }}}$ $(3,4-$ ડાયમિથાઇલ $3-$ હેકઝાનોલ l$)$
${{C}_{6}}{{H}_{5}}-O-C{{H}_{3}}+HI\xrightarrow{\text{heat}}$

