An organic acid $P\left(\mathrm{C}_{11} \mathrm{H}_{12} \mathrm{O}_2\right)$ can easily be oxidized

Question

An organic acid $P\left(\mathrm{C}_{11} \mathrm{H}_{12} \mathrm{O}_2\right)$ can easily be oxidized to a dibasic acid which reacts with ethylene glycol to produce a polymer dacron. Upon ozonolysis, $P$ gives an aliphatic ketone as one of the products. $P$ undergoes the following reaction sequences to furnish $R$ via $Q$. The compound $P$ also undergoes another set of reactions to produce $S$.

Professor PC Thomas Classes · Answer

See detailed solution for explanation.