Chapter 21, Problem 5PP

Interpretation Introduction

Interpretation:

The alternative mechanism suggested for Claisen rearrangement of allyl phenyl ether is to be explained.

Concept introduction:

Claisen rearrangement is the reaction in which allyl phenyl ether is heated at $200°\text{C}$, and rearrangement of the allyl group takes place on the phenyl ring. An unstable intermediate is formed in the reaction.

Friedel-Crafts alkylation is the reaction in which a phenyl ring reacts with an alkyl halide to form alkyl benzene as product. This reaction is an electrophilic aromatic substitution reaction.