Chapter 21, Problem 21.42P

Interpretation Introduction

(a)

Interpretation: The carbonyl compound, and diol needed to prepare the given compound are to be stated.

Concept introduction: Both aldehydes and ketones yield acetal, when they are treated with diols in the presence of aqueous acidic media. Acetals are the groups in which carbon atom is bonded to two $\text{OR}$ groups through single bonds. They are used as protecting groups as they are stable enough in neutral to strong basic condition.

Interpretation Introduction

(b)

Interpretation: The carbonyl compound, and diol needed to prepare the given compound are to be stated.

Concept introduction: Both aldehydes and ketones yield acetal, when they are treated with diols in the presence of aqueous acidic media. Acetals are the groups in which carbon atom is bonded to two $\text{OR}$ groups through single bonds. They are used as protecting groups as they are stable enough in neutral to strong basic condition.