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

Which one of the following statements is false?

The molecular formula of the first member of the family of alkenynes and its name is given by the set:

The most acidic hydrogen is present in:

Acetylene molecules contain

What is the type and number of bonds between carbon atoms in calcium carbide?

Vedclass Test Series

Exam Paper Generator

Online Exam Module