Chapter 26, Problem 26.21P

Interpretation Introduction

(a)

Interpretation: Organic halide needed to convert lithium divinylcuprate to compound is to be predicted.

Concept introduction: Organocuprate reagents $\left({\text{R}}_{\text{2}}\text{CuLi}\right)$ react with halides of organic compounds $\text{RX}$ to form coupling products. Only one alkyl group of the organocuprate reagent is transferred to form the product, while the other becomes part of reaction’s by-product.

Interpretation Introduction

(b)

Interpretation: Organic halide needed to convert lithium divinylcuprate to compound is to be predicted.

Concept introduction: Organocuprate reagents $\left({\text{R}}_{\text{2}}\text{CuLi}\right)$ react with halides of organic compounds $\text{RX}$ to form coupling products. Only one alkyl group of the organocuprate reagent is transferred to form the product, while the other becomes part of reaction’s by-product.

Interpretation Introduction

(c)

Interpretation: Organic halide needed to convert lithium divinylcuprate to compound is to be predicted.

Concept introduction: Organocuprate reagents $\left({\text{R}}_{\text{2}}\text{CuLi}\right)$ react with halides of organic compounds $\text{RX}$ to form coupling products. Only one alkyl group of the organocuprate reagent is transferred to form the product, while the other becomes part of reaction’s by-product.

Interpretation Introduction

(d)

Interpretation: Organic halide needed to convert lithium divinylcuprate to compound is to be predicted.

Concept introduction: Organocuprate reagents $\left({\text{R}}_{\text{2}}\text{CuLi}\right)$ react with halides of organic compounds $\text{RX}$ to form coupling products. Only one alkyl group of the organocuprate reagent is transferred to form the product, while the other becomes part of reaction’s by-product.