SEARCH Articles Figures Tables 1.3- Dienes singlet oxygen Cycloaddition singlet oxygen Diene Cycloaddition Diene oxygenation Dienes 3-1-4 cycloadditions Dienes cycloaddition Oxygen 1,4-cycloaddition Oxygenation singlet oxygen Singlet 4+2]-cycloaddition Singlet oxygen Singlet oxygen cycloaddition with dienes Singlet oxygenation