Chapter 21, Problem 49P

Interpretation Introduction

Interpretation:

The reaction that shows the formation of the given compounds by taking $3-\text{pentanone}$ as a starting reagent is to be determined.

Concept Introduction:

The $\text{γ-lactones}$ are formed by the intramolecular cyclization of the carboxylic esters.

Epoxides are the cyclic compounds which provide a route for the preparation of $\text{γ-lactones}$.

The compounds containing carbonyl groups are attacked by these epoxides which cause the alkylation at the alpha position of the carbonyl compound.