Respuesta :
Answer:
See explanation below
Explanation:
First of all, a Diels Alder reaction is very useful to synthetize rings of 6 carbons. In order to do this, we need two reactants. A dienophile and a conjugate diene.
The conjugate diene, is usually a 4 or 5 carbons, with two double bonds, both conjugate and the dienophile, usually have one double bond and an withdrawing atractor group on 1 carbon.
We already have the product here, which is a ring of 6 carbons, with a double bond and chlorine in two carbons. The only way to do this is putting a conjugate diene of 4 carbons, and a dienophile with 3 carbons and 2 chlorines.
The mechanism of reaction is in the attached picture.
Hope this helps

A Diels - Alder reaction involves a diene and dineophile.
The Diels - Alder reaction is of essence in chemistry because it is used to make compounds of five or more rings. Usually, a Diels - Alder reaction involves a diene and dineophile.
From the full question shown in the image attached to the answer, we can see tat structures 1 and 3 in the image are required to make the ring of six carbons with a double bond between carbons 1 and 2 and a chlorine on both carbons 4 and 5.
Learn more about diens: https://brainly.com/question/1195122
