$\mathrm{PhCHOHCH}_{3}+4 \mathrm{I}_{2}+6 \mathrm{NaOH} \stackrel{\Delta}{\longrightarrow} $$\mathrm{CHI}_{3}+\mathrm{PhCOONa}+5 \mathrm{NaI}+5 \mathrm{H}_{2} \mathrm{O}$
$\begin{array}{*{20}{c}} {C{H_2}OH} \\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {C{H_2}OH} \end{array}$ $+$ ઓક્ઝેલિક ઍસિડ $\xrightarrow{{{{210}^o}C}}$ $\quad\quad X$
$\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad$(મુખ્ય નીપજ)