Question

Show how each of the following compound can be converted to benzoic acid?

$A$: Ethylbenzene

$B$: Acetophenone

$C$: Bromobenzene

$D$: Phenylenthene(Styrene)

Answer 1

$A$:

Strong oxidising agents like potassium permanganate in the presence of $\text{KOH}$ followed by protonation gives benzoic acid.


$B$:

Strong oxidising agents like potassium permanganate in the presence of $\text{KOH}$ followed by protonation gives benzoic acid.


$C$:

Grignard reagents generally reacts with dry ice (solid $C{O}_2$) and followed by an aqueous solution of acid work-up produce carboxylic acids.
The reaction can be given below-

$D$:

Phenylethene (Styrene) on strong oxidation with potassium permanganate $\left(KMn{O}_4\right)$ in the presence of strong alkali $\text{KOH}$ convert alkenes into carboxylic acids.
The reaction can be given below-