What is the major product of the following re | vedclass

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

Question

(A) The reaction is a $Perkin$ condensation. It involves the reaction of an aromatic aldehyde with an acid anhydride in the presence of the correspond

Vedclass · Accepted Answer

Vedclass · Answer

(A) The reaction is a $Perkin$ condensation. It involves the reaction of an aromatic aldehyde with an acid anhydride in the presence of the corresponding carboxylate salt.In this case, $p$-nitrobenzaldehyde reacts with propanoic anhydride $(CH_3CH_2CO)_2O$ in the presence of sodium propionate $(CH_3CH_2COONa)$.The $\alpha$-hydrogen of the propanoic anhydride is abstracted by the propionate ion to form a nucleophilic enolate.This enolate attacks the carbonyl carbon of $p$-nitrobenzaldehyde.Subsequent steps involve the formation of a $\beta$-hydroxy acid derivative, followed by dehydration to form an $\alpha,\beta$-unsaturated acid.The product formed is $2$-methyl-$3$-($4$-nitrophenyl)prop$-2-$enoic acid. The major product is the $(E)$-isomer due to steric considerations, which corresponds to option $A$.

Column-$I$	Column-$II$
$(i)$ Acetic acid	$(a)$ Stephen
$(ii)$ Sodium phenate	$(b)$ Friedel-Crafts
$(iii)$ Methyl cyanide	$(c)$ $HVZ$
$(iv)$ Toluene	$(d)$ Kolbe's

What is the major product of the following reaction?

Similar Questions

Match the reactant in Column-$I$ with the reaction in Column-$II$:
Column-$I$ Column-$II$
$(i)$ Acetic acid $(a)$ Stephen
$(ii)$ Sodium phenate $(b)$ Friedel-Crafts
$(iii)$ Methyl cyanide $(c)$ $HVZ$
$(iv)$ Toluene $(d)$ Kolbe's

The major product in the following reaction is

Product $(A)$ of the reaction is:

Identify the correct option based on the following reaction sequence:
Acetic anhydride $\xrightarrow[(ii) EtOH/H^+/\Delta]{(i) H_3O^+} (A)$ $\xrightarrow[(ii) H_3O^+/\Delta]{(i) NaOEt} (B)$

The conversion of $CH_{3}CH_{2}COOH$ to the product shown below can be accomplished by:
$CH_{3}CH_{2}CH(OCH_{2}CH_{2}O)$

Vedclass Test Series

Exam Paper Generator

Online Exam Module