Question

Complete the drawing of the product of the Diels-Alder reaction, ignoring stereochemistry.

Complete the drawing of the product of the Diels-Alder reaction, ignoring stereochemistry.

Answer 1

Concepts and reason

Diels-Alder reaction is an example of cycloaddition reaction. In which two different molecules containing ${\rm{\pi }}$ bonds react with each other in a concerted manner and a new cyclic compound is formed.

Fundamentals

The Diels-Alder reaction also known as $\left[ {4 + 2} \right]$ cyclo-addition. In this reaction, two things are important, one is diene and another is dienophile. The diene is a conjugated system and the dienophile can be an alkene or an alkyne. The diene is an electron rich species and the dienophile is an electrophile (electron deficient species).

The diene must be in S-cis conformation. A decrease in the electron density in dienophile increases its reactivity towards the reaction. It is a concerted reaction, that is, bond breaking and bond forming occurs simultaneously. The general mechanism of Diels-Alder reaction is as follows:

In the first step, marked the diene and dienophile.

The diene and dienophile is as follows:

The reaction between diene and dienophile is as follows:

Ans: