Abstract:
Diels-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