Chapter 18, Problem 18.37P

Interpretation Introduction

Interpretation:

The way by which phenylacetylene is converted into allyl phenylacetate has to be shown.

Concept introduction:

Hydroboration reaction: The reaction involves addition of ${\text{BH}}_{\text{3}}$ over alkene which makes ${\text{BH}}_{\text{2}}$ to bond with less substituted position of carbon-carbon double bonds and $\text{H}$ to more substituted position of carbon-carbon double bonds which finally carbon containing ${\text{BH}}_{\text{2}}$ gets oxidized in order to achieve the product with less substitution.

Acid chlorides are most often prepared by treating a carboxylic acid with thionyl chloride.

Carboxylic acid can be prepared from primary alcohol and aldehyde by oxidation using strong oxidizing agents like chromic acid, $K_{2}C{r}_2{O}_7$

$\begin{array}{l}\text{Primary}\text{alcohol}\stackrel{\text{Oxidation}}{\to }\text{Aldehyde}\stackrel{\text{Oxidation}}{\to }\text{Carboxylic}\text{acid}\\ \text{Secondary}\text{alcohol}\stackrel{Oxidation}{\to }\text{Ketone}\stackrel{\text{Oxidation}}{\to }\text{No product}\end{array}$

Reaction of an acid chloride with an alcohol:

The reaction of an acid chloride with an alcohol gives an ester