SEARCH Articles Figures Tables Addition reactions Diels-Alder reaction Addition reactions imines Diels hetero Diels-Alder addition Diels-Alder addition reaction Diels-Alder reactions additives Hetero addition Hetero imines Hetero-Diels-Alder Hetero-Diels-Alder reaction Imine additions Imine additions Diels-Alder reaction Imine reaction Imines, Diels-Alder reaction Imines, additions Imines, reactions