SEARCH Articles Figures Tables Acetylene 2+4]-cycloaddition Acetylenes cycloadditions Cycloaddition Reactions of Acetylenes Cycloaddition and Heterocyclization Reactions of Acetylenic Compounds with Electron-Withdrawing Substituents Dimerization, Intermolecular Cycloaddition, and Reactions of Acetylenes Dipolar cycloaddition, of acetylenic The Pauson-Khand reaction cycloadditions of olefins, acetylenes, and CO