Intermolecular [2+2+1] cycloaddition which incorporates an alkyne, an isocyanate, and an alkene into a γ-butyrolactam proceeds with nickel catalyst.

Visible light driven decarbonylation of [(mu(2)-alkyne)Co(2)(CO)(6)] complexes enables the formation of cyclopentenones in good yields at ambient temperatures.

The reaction of hydrazones with iodine/base leads to diazo intermediates that can be trapped by an internal alkene or alkyne.

Enantioselective nickel-catalyzed reactions of (hetero)arylboronic acids or alkenylboronic with substrates containing an alkyne tethered to various acyclic electron-deficient alkenes are described.

The interface as a "screw clamp": the copper-free 1,3-dipolar azide-alkyne cycloaddition at the interface of nanodroplets in miniemulsions was studied in detail by NMR spectroscopic methods. The reaction at the oil-water interface proved to exhibit higher rate constants, increased molecular weights and high regioregularity compared to the reaction in solution.

The clusters Ti(6)O(4)(OPr)(8)(OOC(CH(2))(2)C[triple bond]CH)(8) and [Zr(6)O(4)(OH)(4)(OOC(CH(2))(3)C[triple bond]CH)(12)](2) with acetylenic carboxylate ligands were prepared and structurally characterized in solution and in the crystalline state. Model reactions showed that they are suitable candidates for the formation of cluster-based inorganic-organic hybrid materials by alkyne-azide click...

Despite the tremendous impact of alkene ring-opening metathesis polymerization (ROMP) on the design and the synthesis of polymers and functional materials, examples for the analogous alkyne ROMP remain scarce. This imbalance can be rationalized by the limited availability of commercially available catalysts and the lack of alkyne metathesis monomers. We present here the synthesis and a systemat...