The major product H in the given reaction seq | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) $1$. The reaction of butan$-2-$one $(CH_3-CH_2-CO-CH_3)$ with $CN^-$ (cyanide ion) is a nucleophilic addition reaction,which forms a cyanohydrin i

Vedclass · Accepted Answer

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

Vedclass · Answer

(A) $1$. The reaction of butan$-2-$one $(CH_3-CH_2-CO-CH_3)$ with $CN^-$ (cyanide ion) is a nucleophilic addition reaction,which forms a cyanohydrin intermediate $(G)$: $CH_3-CH_2-C(OH)(CN)-CH_3$.$2$. Treatment of the cyanohydrin $(G)$ with concentrated $95\% \ H_2SO_4$ and heat leads to two simultaneous processes: hydrolysis of the nitrile $(-CN)$ group to a carboxylic acid $(-COOH)$ group and dehydration of the alcohol $(-OH)$ group to form a double bond.$3$. The dehydration follows $Saytzeff$ rule,forming the more substituted alkene. The resulting product $H$ is $CH_3-CH=C(CH_3)-COOH$ ($2$-methylbut$-2-$enoic acid).

The major product $H$ in the given reaction sequence is:
$CH_3-CH_2-CO-CH_3$ $\xrightarrow{CN^-} G$ $\xrightarrow{95\% \ H_2SO_4, \Delta} H$

Similar Questions

$CH_3COOH + C_2H_5^{18}OH \xrightarrow{Conc. H_2SO_4} (X)$
$CH_3COOH + (CH_3)_3C^{18}OH \xrightarrow{Conc. H_2SO_4} (Y)$
In the above reaction $(X)$ and $(Y)$ are respectively:

Which of the following is used in perfumery?

The product of the Perkin reaction is:

Identify $A, B$ and $C$ in the following reactions:
$CH_3 Cl$ $\xrightarrow{KCN} A$ $\xrightarrow{H_3 O^{\oplus}} B$ $\xrightarrow{C_2 H_5 OH / H^{+}, \Delta} C$

The refluxing of $(CH_3)_2NCOCH_3$ with acid gives

Vedclass Test Series

Exam Paper Generator

Online Exam Module

The major product $H$ in the given reaction sequence is:$CH_3-CH_2-CO-CH_3$ $\xrightarrow{CN^-} G$ $\xrightarrow{95\% \ H_2SO_4, \Delta} H$