Acta Crystallographica Section E: Crystallographic Communications (Apr 2021)

Synthesis and crystal structure of allyl 7-(diethylamino)-2-oxo-2H-chromene-3-carboxylate

  • Vanessa Nowatschin,
  • Christian Näther,
  • Ulrich Lüning

DOI
https://doi.org/10.1107/S2056989021002218
Journal volume & issue
Vol. 77, no. 4
pp. 331 – 334

Abstract

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The title compound, C17H19NO4, was synthesized by the reaction of 7-(diethylamino)-2-oxo-2H-chromene-3-carboxylic acid with allyl bromide and purified by flash column chromatography on silica gel. Crystals suitable for single-crystal X-ray diffraction were obtained by recrystallization from acetone. The aromatic core of the molecule is not planar with the diethylamino group and with the carboxyl group that are rotated out of the 2-oxo-2H-chromene plane by 6.7 (2)° and 11.4 (2)°. The NC2 unit of the diethylamino group is planar with an angle sum close to 360°. Intermolecular Car—H...Ocarbonyl interactions lead to the formation of chains parallel to the b axis. X-ray powder diffraction analysis proves that the title compound was obtained as a pure phase.

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