The final product A in the following reaction | vedclass

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(A) $1$. The reaction of $CH_3CH_2COCH_3$ (butanone) with $HCN$ is a nucleophilic addition reaction,which forms a cyanohydrin: $CH_3CH_2C(OH)(CN)CH_3$

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$CH_3-CH=C(CH_3)-COOH$

Vedclass · Answer

(A) $1$. The reaction of $CH_3CH_2COCH_3$ (butanone) with $HCN$ is a nucleophilic addition reaction,which forms a cyanohydrin: $CH_3CH_2C(OH)(CN)CH_3$.$2$. Treatment of the cyanohydrin with $95\% \ H_2SO_4$ and heat leads to the dehydration of the alcohol group and hydrolysis of the nitrile group (or dehydration followed by hydrolysis),resulting in an $\alpha,\beta$-unsaturated carboxylic acid.$3$. The dehydration of $CH_3CH_2C(OH)(CN)CH_3$ followed by hydrolysis yields $CH_3-CH=C(CH_3)-COOH$ ($2$-methylbut$-2-$enoic acid).

The final product $A$ in the following reaction sequence is:

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