SEARCH Articles Figures Tables Addition 1,3-cycloadditions Addition reactions Diels-Alder reaction Addition reactions cycloaddition Addition/cycloaddition Alder Cycloaddition Cycloaddition reactions Diels-Alder reaction Diels cycloaddition Diels cycloaddition reactions Diels-Alder addition Diels-Alder addition reaction Diels-Alder cycloaddition Diels-Alder cycloadditions Diels-Alder reaction 2 + 2] cycloaddition Diels-Alder reactions additives