Chapter 22, Problem 22.63P

Interpretation Introduction

Interpretation:

Synthesis of the stilbene by using benzene and any carboxylic acid is to be determined.

Concept introduction:

${\text{SOCl}}_{\text{2}}$ is used for the conversion of acid into acyl chloride. By using this reaction bad leaving group $\left(\text{-OH}\right)$ is converted into a good leaving group.

Friedel-crafts acylation is an electrophilic aromatic substitution reaction. In this reaction, acyl halide is reacted with benzene in the presence of Lewis acid ${\text{AlCl}}_{\text{3}}$. In this reaction, a new $\text{C-C }$ bond is formed between electrophile and nucleophile.

The reducing agent ${\text{NaBH}}_{\text{4}}$ in the presence of ethanol used for the reduction of aldehyde or ketone in alcohol. ${\text{NaBH}}_{\text{4}}$ reduce carbonyl group into a hydroxyl group $\left(\text{-OH}\right)$.

Elimination of water is taking place in the presence of ${\text{H}}_{\text{3}}{\text{PO}}_{\text{4}}$ and heat results in the formation of the alkene.