Respuesta :
Answer:
Cyclic dienes in s-cis conformation can give Diels Alder reaction producing bicycles, as in the reaction below.
The ENDO approach, which is our case, leaves the substituents of the ENDO dienophile (away from the bridge) in the final bicycle.
The reaction of a conjugated diene with an olefin results in a cyclohexene. It is a reaction where two sigma C-C links are formed at the cost of two π links. The double bonds C = C of the conjugated diene cooperate to react with the olefin as if they were a clamp.
The reaction is shown in the added image.
Explanation:
Diels-Alder is a reaction between a conjugated diene and an alkene also called dienophile. It is a concerted reaction, bonds are broken at the same time as new ones are formed and it takes place in a single stage.

Answer:
See explanation below
Explanation:
First, you are not puttting the product and the starting materials to do the diels alder reaction. However, I will explain to you the general mechanism, and an example of a diels alder reaction.
The diels alder reactions are a 2,4 - cycloadition of a conjugated diene and a dienophyle (This can be another alkene, a cycloalkene, an alkine, etc); the general mechanism is as follow in picture 1 (See attached picture)
Now, following this general mechanism, we can do almost any diels alder reaction between an conjugate diene and a dienophyle.
Let's see the following example in picture 2. You can see you have a conjugated diene and dienophyle (Remember that a conjugated diene, is a carbonated chain with two double bonds, but conjugated means that you these double bonds are right next to carbon with a single bond, like the trick, of "Love me, love me not, Love me. That's the love me conjugated)
Stereochemistry refers as how are the bonds, and if the carbons have R, S configurations. See picture 2.

