2-Oxo-2H-chromen-7-yl 3-methyl-butano-ate
Akoun Abou1, Hypolite Bazié2, Ludovic Akonan3
1Joint Research and Innovation Unit for Engineering Sciences and Techniques, (UMRI STI), Research Team: Instrumentation, Image and Spectroscopy, Félix Houphouet-Boigny National Polytechnic Institute, BP 1093 Yamoussoukro, Côte d'Ivoire.
Abstract:
The title compound, C14H14O4, was synthesized by O-acyl-ation of umbelliferone with isovaleryl chloride in the presence of diethyl ether as a solvent and pyridine as a base. The side chain moiety i.e. the acetate fragment linking to the methyl-ethyl group is almost orthogonal to the almost planar (r.m.s deviation = 0.020 Å) coumarin ring system, making an angle of 76.26 (7)°. In the crystal, the mol-ecules form centrosymmetric dimers through pairwise C-H⋯O hydrogen bonds, generating R 2 2(8) and R 2 2(18) loops that lie within the crystallographic ac plane and propagate along the [001] direction.
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