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NEET levelSingle correct optionDifficulty 1 of 3co058

Benzaldehyde is heated with ethanoic anhydride and sodium ethanoate, and the mixture is then acidified. The main product (Perkin reaction) is

A3-phenylprop-2-enoic acid
B3-phenylpropanoic acid
Cbenzoic acid
D2-phenylpropanoic acid

Answer: A

Perkin reaction condenses an aromatic aldehyde with the enolate of an anhydride, then eliminates water.

C X_{6} H X_{5} CHO

with

(CH X_{3} CO) X_{2} O

gives

C X_{6} H X_{5} CH = CHCOOH

, cinnamic acid, 3-phenylprop-2-enoic acid.

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