Question

What is the name of the following reaction?
$PhCHO+{\left(C{H}_{3}CO\right)}_{2}O\stackrel{Na(OAc{)}_2}{\to }PhCH=CHC{O}_{2}H$

• A. Oxymercuration demercuration reaction
• B. Cannizzaro reaction
• C. Knoevenagel’s reaction
• D. Perkin reaction

Answer 1

Answer: (D)

The name of the following reaction
$PhCHO+{\left(C{H}_{3}CO\right)}_{2}O\stackrel{Na(OAc{)}_2}{\to }PhCH=CHCOOH$ is Perkin reaction.
The product is cinnamic acid, an $\alpha ,\beta$-unsaturated aromatic acid.
It is obtained by the aldol condensation of benzaldehyde and acetic anhydride,
in the presence of sodium acetate.