[Open access]

[Contents scheme]

Acta Cryst. (2013). E69, o180
[ doi:10.1107/S1600536812051720 ]

Methyl 6-ethoxy-3-phenyl-3a,4-dihydro-3H-chromeno[4,3-c]isoxazole-3a-carboxylate

G. Suresh, J. Srinivasan, M. Bakthadoss and S. Aravindhan

Abstract: In the title compound, C20H19NO5, the dihedral angle between the mean plane of the pyran ring (which has a half-chair conformation) and the benzene ring of the chromeno ring system is 7.21 (7)°. The dihedral angle between the mean plane of the chromeno ring system and the isoxazole ring is 21.78 (6)°, while the isoxazole ring forms a dihedral angle of 72.60 (8)° with the attached phenyl ring. In the crystal, molecules are linked via pairs of C-H...O hydrogen bonds, forming inversion dimers with an R22(10) ring motif. These dimers are linked via C-H...N hydrogen bonds, forming chains along [001].


Copyright © International Union of Crystallography
IUCr Webmaster