Chapter 21, Problem 21.61P

Interpretation Introduction

(a)

Interpretation: The two different methods to carry out the given transformation; a one-step method using a Wittig reaction, and a two-step method using a Grignard reagent are to be stated and the preferred route is to be identified.

Concept introduction: The Wittig reaction is always preferred for the synthesis of alkene rather than other elimination reactions. The mostly elimination methods generally gives mixture of constitutional isomers, through $\text{E1}$ reaction.

Interpretation Introduction

(b)

Interpretation: The two different methods to carry out the given transformation; a one-step method using a Wittig reaction, and a two-step method using a Grignard reagent are to be stated and the preferred route is to be identified.

Concept introduction: The Wittig reaction is always preferred for the synthesis of alkene rather than other elimination reactions. The mostly elimination methods generally gives mixture of constitutional isomers, through $\text{E1}$ reaction.