complete account of the intermolecular and intramolecular Pauson–Khandreactions of N-(2-alkynoyl) derivatives of chiral 2-oxazolidinones is presented. The intermolecularPauson–Khandreactions with norbornene or norbornadiene take place under mild conditions and in high yields. Phenyl- or trimethylsilylpropiolate derivatives lead to the exclusive formation of 1,4-dicarbonyl regioisomers, while mixtures