Chapter 20, Problem 20.13P

Interpretation Introduction

(a)

Interpretation:

Major product and detailed mechanism for the following reaction is to be proposed.

Concept introduction:

Hydride ions from sources such as ${\text{NaBH}}_{\text{4}}$ and ${\text{LiAlH}}_{\text{4}}$ are excellent nucleophiles but not practical leaving groups. These kinds of nucleophiles can still react with acid derivatives in nucleophilic addition-elimination reactions.

Interpretation Introduction

(b)

Interpretation:

Major product and detailed mechanism for the following reaction is to be proposed.

Concept introduction:

Hydride ions from sources such as ${\text{NaBH}}_{\text{4}}$ and ${\text{LiAlH}}_{\text{4}}$ are excellent nucleophiles but not practical leaving groups. These kinds of nucleophiles can still react with acid derivatives in nucleophilic addition-elimination reactions.