Chapter 26, Problem 26.39P

Interpretation Introduction

(a)

Interpretation: The stepwise mechanism that illustrates the formation of E is to be drawn.

Concept introduction: The treatment of an organic halide with an alkene in the presence of $\text{Pd}$ catalyst to form an alkene that is highly substituted with a new $\text{C}-\text{C}$ bond is known as Heck reaction. Generally, $\left[\text{Pd}{\left(\text{OAc}\right)}_2\right]$ in the presence of $\left[\text{P}{\left(o\text{-tolyl}\right)}_3\right]$ is utilized as a catalyst. The reaction is carried out in the presence of organic base, like ${\text{Et}}_{\text{3}}\text{N}$.

Interpretation Introduction

(b)

Interpretation: The suggestion made by the formation of E about the stereochemistry of elimination reaction is to be stated.

Concept introduction: The treatment of an organic halide with an alkene in the presence of $\text{Pd}$ catalyst to form an alkene that is highly substituted with a new $\text{C}-\text{C}$ bond is known as Heck reaction. Generally, $\left[\text{Pd}{\left(\text{OAc}\right)}_2\right]$ in the presence of $\left[\text{P}{\left(o\text{-tolyl}\right)}_3\right]$ is utilized as a catalyst. The reaction is carried out in the presence of organic base, like ${\text{Et}}_{\text{3}}\text{N}$.