The best sequence of reactions to prepare 2-h | vedclass

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

Question

(C) To prepare $2$-heptanone $(CH_{3}COCH_{2}CH_{2}CH_{2}CH_{2}CH_{3})$,we need a terminal alkyne that,upon hydration,yields the ketone at the $C-2$ p

Vedclass · Accepted Answer

$1$-hexyne $\xrightarrow{NaNH_{2}} X$ $\xrightarrow{CH_{3}Br} Y$ $\xrightarrow{H_{2}O, H_{2}SO_{4}, Hg^{2+}}$

Vedclass · Answer

(C) To prepare $2$-heptanone $(CH_{3}COCH_{2}CH_{2}CH_{2}CH_{2}CH_{3})$,we need a terminal alkyne that,upon hydration,yields the ketone at the $C-2$ position. $1$-hexyne $(CH_{3}CH_{2}CH_{2}CH_{2}C \equiv CH)$ reacts with $NaNH_{2}$ to form the acetylide ion $(CH_{3}CH_{2}CH_{2}CH_{2}C \equiv C^-)$. This ion reacts with $CH_{3}Br$ via an $S_{N}2$ mechanism to form $2$-heptyne $(CH_{3}CH_{2}CH_{2}CH_{2}C \equiv C-CH_{3})$. Finally,the acid-catalyzed hydration of $2$-heptyne using $H_{2}O, H_{2}SO_{4}, Hg^{2+}$ follows Markovnikov's rule to produce $2$-heptanone. Thus,option $C$ is the correct sequence.

The best sequence of reactions to prepare $2$-heptanone is

Similar Questions

The compound $C_3H_4$ has a triple bond,which is indicated by its reaction with

Identify the alkyne in the following sequence of reactions:
Alkyne $\xrightarrow{\text{H}_2, \text{Lindlar's catalyst}} A$ $\xrightarrow{\text{Ozonolysis}} B \text{ (only)}$
Given that $B$ is obtained from $\text{CH}_2=\text{CH}_2$ via the Wacker process.

The reaction of silver powder with chloroform produces $....$.

Which of the following organic compounds has the same hybridization as its combustion product $(CO_2)$?

What will be $X$ in the following reaction?
${C_2}{H_2} \xrightarrow[{HgSO_4 / H_2SO_4, 60^{\circ}C}]{{H_2O}} X \rightleftharpoons CH_3CHO$

Vedclass Test Series

Exam Paper Generator

Online Exam Module