Respuesta :

The Diels–Alder reaction is an organic chemicalreaction (specifically, a [4+2] cycloaddition) between a conjugated diene and a substituted alkene, commonly termed the dienophile, to form a substituted cyclohexene system.

We should look out for a conjugated diene and the dienophile being a  substututed alkene.

The diels - alder reaction occurs basically between a conjugated diene and a substituted alkene. The substituted alkene is referred to as a dienophile. The reaction occurs by a 4 + 2 cycloadition.

The question is incomplete hence we can't see the diene and the dienophile. However, we should look out for a conjugated diene and the dienophile being a  substututed alkene.

Learn more about diels–alder reaction:https://brainly.com/question/1301963