Chapter 21, Problem 21.65P

Interpretation Introduction

(a)

Interpretation: A synthesis of given compound from $\text{5}-\text{hydroxy}-\text{2}-\text{pentanone}$ $\left({\text{CH}}_{\text{3}}{\text{COCH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}\text{OH}\right)$ as starting material is to be devised.

Concept introduction: When a compound has more than one function groups that can undergo a reaction with the same reagent then a protecting group is introduced in that compound to protect one functional group. Diols can be used as protecting group of carbonyl group.

Interpretation Introduction

(b)

Interpretation: A synthesis of given compound from $\text{5}-\text{hydroxy}-\text{2}-\text{pentanone}$ $\left({\text{CH}}_{\text{3}}{\text{COCH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}\text{OH}\right)$ as starting material is to be devised.

Concept introduction: Wittig reaction is an organic chemical reaction that is used to synthesize alkene. In the Wittig reaction, an aldehyde or ketone reacts with a Wittig reagent to form alkene and triphenylphosphine oxide. The Wittig reagent is also known as triphenyl phosphonium ylide.