Chapter 9, Problem 53P

Interpretation Introduction

Interpretation: A stepwise detailed mechanism for the given intramolecular reaction is to be drawn.

Concept introduction: Alcohols form cyclic ethers when they undergo intramolecular ${\text{S}}_{\text{N}}\text{2}$ reaction. The reaction is carried out in the presence of strong acid like ${\text{H}}_{\text{2}}{\text{SO}}_{\text{4}}$ or $\text{TsOH}$. The mechanism of the reaction involves four steps.