Chapter 22.SE, Problem 60AP

Interpretation Introduction

a)

Interpretation:

What is wrong with the synthetic route given is to be stated.

Concept introduction:

Aldehydes and ketones get brominated at α-carbon when treated with Br₂ in acetic acid. Dehydrohalogenation occurs when an alkyl hakide is treated with alc.KOH or when heated with pyridine.

To state:

What is wrong with the synthetic route given?

Interpretation Introduction

b)

Interpretation:

What is wrong with the synthetic route given is to be stated.

Concept introduction:

Acetoacetic ester when treated with sodium ethoxide yields an enolate anion. The enolate ion will undergo a S_N² displacement reaction with primary alkyl halides. Hydrolysis of the diester and decarboxylation of the dicarboxylic acid produced will yield a monocarboxylic acid.

To state:

What is wrong with the synthetic route given?

Interpretation Introduction

c)

Interpretation:

What is wrong with the synthetic route given is to be stated.

Concept introduction:

Acetoacetic ester synthesis can be used to prepare methyl ketones. Carboxylic acids can be prepared by malonic ester synthesis.

To state:

What is wrong with the synthetic route shown?