Chapter 24, Problem 24.39P

Interpretation Introduction

Interpretation:

The given molecules are to be ranked in order from slowest to fastest rate of reaction in a Diels–Alder reaction with $\text{buta-1, 3-diene}$.

Concept introduction:

In a standard Diels–Alder reaction, the diene is electron rich and the dienophile is electron poor. Electron-donating substituents bonded directly to the diene carbons facilitate standard Diels–Alder reactions. Electron-withdrawing substituents bonded directly to the dienophile carbons facilitate standard Diels–Alder reactions.