SEARCH Articles Figures Tables Diels-Alder Cycloadditions pericyclic reactions Pericyclic Pericyclic reactions Pericyclic reactions Diels-Alder reaction Pericyclic reactions Diels-Alder reaction Pericyclic reactions hetero-Diels-Alder reaction Pericyclic retro-Diels-Alder reaction The Diels-Alder as an Example of a Pericyclic Reaction