SEARCH Articles Figures Tables 1,3-cycloaddition intramolecular Imine 2+2] cycloaddition Imines cycloadditions Imines intramolecular Nitrile imine Nitrile imines cycloaddition Nitrile imines cycloadditions Nitriles cycloaddition Nitriles cycloadditions Nitriles intramolecular Stereoselectivity nitrile imine intramolecular cycloadditions