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Updated: Jan 11, 2026

A Two-Step Protocol for Umpolung Functionalization of Ketones Via Enolonium Species
Published on: August 16, 2018
2-Oxo-2H-chromen-7-yl penta-noate
A J N'Gouan1, H Bazié2, S D Goulizan Bi1
1Laboratory of Material, Sciences, Environnement and Solar Energy, Research Team: Crystallography and Molecular Physics, University Félix Houphouêt-Boigny, 22 BP 582 Abidjan 22, Côte d'Ivoire.
None:
In the title compound, C14H14O4, the dihedral angle between the coumarin nucleus and the penta-noate moiety is 62.20 (7)°. The coumarin moiety is planar as usual, with a maximum deviation from the least-squares plane of 0.081 (2) Å. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds into centrosymmetric dimers with an R 2 2(8) graph-set motif, and the cohesion of the crystal is also supported by π-π inter-actions with a centroid-centroid distance of 3.9342 (8) Å. A Hirshfeld surface analysis revealed that 44.6% of the inter-molecular inter-actions are from H⋯H contacts, 28.2% are from ⋯O/O⋯H contacts and 16.3% are from H⋯C/C⋯H.
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