SEARCH Articles Figures Tables Diels-Alder dienes Diels-Alder synthesis Diels’ diene synthesis Diene Diels-Alder reaction Diene reaction Diene synthesis Dienes Diels Alder reactions Dienes, reactions Dienes, synthesis Nitrogen synthesis Retro Diels-Alder reaction Retro-Diels-Alder Retro-reaction Synthesis Diels-Alder reaction