Chapter 21, Problem 43P

Interpretation Introduction

(a)

Interpretation: The given carboxylic acids is to be prepared by using malonic ester synthesis.

Concept introduction: The malonic ester synthesis is a method which is used to convert diethyl malonate into a carboxylic acid. $\text{NaOEt}$ is a strong base. It abstracts a proton from the alpha carbon of an ester molecule to forms an enolate.

Interpretation Introduction

(b)

Interpretation: The given carboxylic acids are to be prepared by using malonic ester synthesis.

Concept introduction: The malonic ester synthesis is a method which is used to convert diethyl malonate into a carboxylic acid. $\text{NaOEt}$ is a strong base. It abstracts a proton from the alpha carbon of an ester molecule to forms an enolate.