SEARCH Articles Figures Tables 2-Methylene-1,3-dithiolane-1,3dioxides, cycloaddition 3- Methoxy-5-methylene-2 -furanone cycloaddition with butadiene 3-Bromo-5-methylene-2 -furanone cycloaddition with butadiene Carbenes. Methylene. Cycloaddition Metallacyclobutane, 2-methylene cycloaddition reactions Methylene, triplet, cycloaddition Methylene, triplet, cycloaddition reactions