Which of the following will be dehydrated mos | vedclass

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

Question

(B) In an alkaline medium,the dehydration of $\beta$-hydroxy carbonyl compounds (aldol products) occurs via an $E1cB$ mechanism. First,the base abstra

Vedclass · Accepted Answer

$4-$hydroxy$-2-$pentanone

Vedclass · Answer

(B) In an alkaline medium,the dehydration of $\beta$-hydroxy carbonyl compounds (aldol products) occurs via an $E1cB$ mechanism. First,the base abstracts the acidic $\alpha$-proton to form an enolate ion. Then,the hydroxide ion $(-OH)$ at the $\beta$-position is eliminated to form an $\alpha,\beta$-unsaturated carbonyl compound. For this to occur,the molecule must have both a carbonyl group and a hydroxyl group at the $\beta$-position relative to each other,and an $\alpha$-hydrogen must be available. Option $(B)$,$4$-hydroxy$-2-$pentanone,is a $\beta$-hydroxy ketone with an $\alpha$-hydrogen,which readily undergoes dehydration to form pent$-3-$en$-2-$one.

Which of the following will be dehydrated most readily in alkaline medium?

Similar Questions

$CaOCl_2 + H_2O \longrightarrow Ca(OH)_2 + X$
$X + CH_3CHO \longrightarrow Y$
$Y + Ca(OH)_2 \longrightarrow CHCl_3$
What is '$Y$'?

Metaformaldehyde is:

$n$-hexane $\xrightarrow{Al_2O_3/\Delta} (A)$ $\xrightarrow{(CO + HCl)/AlCl_3} (B)$. Select the incorrect statement among the following:

The active ion in Tollen's reagent is

The major product formed in the following reaction is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module