Chapter 21, Problem 21.50P

Interpretation Introduction

Interpretation: The lettered intermediates in the given reaction sequence are to be identified.

Concept introduction: An electrophilic aromatic substitution reaction is catalyzed by some lewis acid such as ${\text{FeBr}}_{\text{3}}$ and ${\text{AlCl}}_{\text{3}}$. A Grignard reagent is organometallic compound formed by the reaction of an alkyl halide and magnesium metal. The full form of PCC is pyridiniumchlorochromate. It acts as a mild oxidizing agent. It oxidizes primary alcohols into aldehyde and secondary alcohol into ketones.