SEARCH Articles Figures Tables 3 -Furanon 3- Methoxy-5-methylene-2 -furanone 3- Methoxy-5-methylene-2 -furanone cycloaddition with butadiene 3-Bromo-5-methylene-2 -furanone 3-Bromo-5-methylene-2 -furanone cycloaddition with butadiene 5-Methylene-2 -furanone, formation 5-Methylene-2 -furanone, formation as a dienophile 5-Methylene-2 -furanones Diels-Alder reactions 5-Methylene-2-furanone