SEARCH Articles Figures Tables 1,3-cycloaddition intramolecular Alkyne intramolecular Alkynes 2+2]-cycloadditions Alkynes cycloaddition Azomethine ylide cycloaddition Azomethine ylide cycloadditions Azomethine ylide cycloadditions intramolecular Azomethine ylides cycloaddition Azomethine ylides intramolecular cycloadditions Azomethine ylides, cycloaddition alkynes Azomethines, cycloaddition Ylides cycloaddition