Chapter 20, Problem 20.22P

Interpretation Introduction

(a)

Interpretation:

The product formed when $\text{2, 2-dimethyl-3-oxo-3-phenylpropanoic}\text{acid}$ reacts with acid is to be stated.

Concept introduction:

Decarboxylation reaction occurs when a $\text{β-keto}\text{}\text{acid}$ is heated. When $\text{β-keto}\text{}\text{acid}$ is heated, an enol intermediate is formed with the release of carbon dioxide. The enol tautomerises into a ketone.

Interpretation Introduction

(b)

Interpretation:

The product formed when malonic acid is heated in acidic medium is shown below.

Concept introduction:

Decarboxylation reaction occurs when a $\text{β-keto}\text{}\text{acid}$ is heated. When $\text{β-keto}\text{}\text{acid}$ is heated, an enol intermediate is formed with the release of carbon dioxide. The enol tautomerises into a ketone.

Interpretation Introduction

(c)

Interpretation:

The product formed when carbonic acid derivative is heated in acidic medium is to be stated.

Concept introduction:

Decarboxylation reaction occurs when a $\text{β-keto}\text{}\text{acid}$ is heated. When $\text{β-keto}\text{}\text{acid}$ is heated, an enol intermediate is formed with the release of carbon dioxide. The enol tautomerises into a ketone.