Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 2 (February 2013)

organic compounds

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].

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