SEARCH Articles Figures Tables 1,3-cycloaddition intramolecular 1.7- Dienes intramolecular Cycloaddition reaction intramolecular Cycloaddition reactions diene Cycloaddition reactions intramolecular cycloadditions Diene Cycloaddition Diene reaction Dienes 3-1-4 cycloadditions Dienes cycloaddition Dienes cycloaddition reactions Dienes, reactions