Chapter 24, Problem 24.24P

Interpretation Introduction

Interpretation:

In Equation 24-51, the $\text{buta-1, 3-diene}$ reacts selectively with the $\text{C=C}$ double bond attached to the ${\text{CH}}_3$ group instead of the one attached to the ${\text{OCH}}_3$ group. The reason for it is to be explained.

Concept introduction:

The standard Diels-Alder reaction is favored when the dienophile is electron poor. That means the Diels alder reaction is favored when electron withdrawing groups are present on dienophile.