Acta Cryst. (2009). E65, o1324  [ doi:10.1107/S160053680901753X ]

Ethyl 2-amino-4-(3-chlorophenyl)-5,10-dioxo-5,10-dihydro-4H-benzo[g]chromene-3-carboxylate

X. Hu, S. Lei and C.-S. Yao

Abstract: The title molecule, C₂₂H₁₆ClNO₅, was obtained by the reaction of (E)-ethyl 3-(3-chlorophenyl)-2-cyanoacrylate and 2-hydroxynaphthalene-1,4-dione catalysed by triethylamine in ethanol. In the crystal structure, the chlorobenzene ring makes a dihedral angle of 88.63 (4)° with the fused ring system. The six-membered ring formed by an intramolecular N-HO hydrogen bond is almost planar. The crystal packing is stabilized by N-HO hydrogen bonds.

Online 20 May 2009

Copyright © International Union of Crystallography
IUCr Webmaster