Question

Question: Draw the products of each Diels–Alder reaction, and indicate the stereochemistry.

a.

b.

c.

Short answer

Answer

a.

b.

c.

Step-by-step solution

Diels-Alder reaction

The Diels-Alder reaction occurs between a conjugated diene and an alkene called the dienophile.

The diene in a Diels-Alder reaction will be electron-rich, whereas the diene must be electron-poor alkenes and alkynes.

Example of Diels-Alder reaction

An example of Diels-Alder reaction is shown:

Example for Diels-Alder reaction

To find the product and stereochemistry

A cis dienophile will always form cis-substituted cyclohexene, and a trans dienophile will always form trans-substituted cyclohexene.

Representation of product of A

Here the dienophile is in cis position, combining with a diene to form a cis-substituted product.

Representation of product of B