Perera K. Sarath D2025-02-222025-02-222023-06https://dr.ichemc.ac.lk/handle/123456789/27350,51Diels-Alder (D-A) reaction is a (4π+2π) cycloaddition reaction. It is used to generate six-membered rings by combining two π-systems. The key components of this reaction are a conjugated diene (an alkene with two π-bonds) and a dienophile (simple alkene or alkyne). During this concerted reaction, two new sigma bonds are formed and change of two π-bonds into sigma bonds takes place.enDiels-Alder ReactionArticle