Chapter 18, Problem 43P

Interpretation Introduction

Interpretation:

The key intermediate, compound B formed in the reaction is to be identified and the other compound formed in the reaction is to be shown.

Concept introduction:

Ketal is an organic compound with general formula ${\text{R}}_2\text{C}{\left(\text{OR'}\right)}_2$. In the formula, $2$

alkoxy groups $\left(\text{OR'}\right)$ are bonded with same carbon atom in between the chain. The $\text{R'}$ and $\text{R}$ groups may be same or different.

In intramolecular aldol condensation, the self condensation occurs to form cyclic enone.