Chapter 19, Problem 27P

Interpretation Introduction

Interpretation: In the Dieckmann condensation of diethyl succinate, the product formed has molecular formula ${\text{C}}_{\text{12}}{\text{H}}_{\text{16}}{\text{O}}_{\text{6}}$. The structure of the compound is to be determined.

Concept introduction:

Dieckmann condensations are also known as intermolecular Claisen condensationsthatareuseful for the synthesis of five or six membered ring.

Due to angle strain, the ring smaller than five membered ring are disfavored.