SEARCH Articles Figures Tables 1,3-oxabutadiene 1-Oxabutadiene electron-donating 1-Oxabutadiene electron-withdrawing 1-Oxabutadiene hetero 1-Oxabutadiene intramolecular reaction 1-Oxabutadiene simple system 2- Aza-l-oxabutadiene Hetero-1-oxabutadienes Hetero-l-oxabutadienes Oxabutadiene Diels-Alder Reactions Oxabutadiene cationic Oxabutadienes, Cycloadditions Reactions of Chiral Oxabutadienes with Achiral Vinylethers Reactions of Oxabutadienes