Chapter 23.12, Problem 11P

Interpretation Introduction

Interpretation:

The product obtained in the Claisen rearrangement of ${\text{C}}_{\text{6}}{\text{H}}_{\text{5}}{\text{OCH}}_{\text{2}}\text{CH}={\text{CHCH}}_{\text{3}}$ is to be determined.

Concept introduction:

Allyl phenyl ethers undergo Claisen rearrangement to form $o$-allyl phenols.

In this type of rearrangement, the allyl group migrates from the oxygen atom in the ring to the carbon atom which is at an ortho position to it.

The transition state formed in the first step of the Claisen rearrangement is similar to that in the Diels-Alder cycloaddition.