Chapter 18, Problem 30P

Interpretation Introduction

Interpretation:

The compound ${\text{CH}}_3\text{OCHP}{\left({\text{C}}_6{\text{H}}_5\right)}_3$ is to be prepared, a mechanism for the given second reaction to produce an aldehyde is to be shown and the preparation of cyclohexane carbaldehyde from cyclohexanone is to be discussed.

Concept Introduction:

▸ The organophosphorus is called the wittig reagent.

▸ In ${\text{S}}_{\text{N}}\text{2}$ reaction, one bond is broken and one bond is formed. In ${\text{S}}_{\text{N}}\text{2}$ reaction, the nucleophile attacks the less sterically hindered carbon.

▸ In the wittig reaction, the wittig reagent reacts with the aldehyde and ketone to give alkenes.