Received 22 April 2013
In the title compound, C15H9Br2NO3, the chromene unit is not quite planar (r.m.s. deviation from planarity = 0.0888 Å). The dihydropyran ring adopts an envelope conformation with the phenyl-substituted C atom fused to the dihydropyran ring as the flap. The dihedral angle between the plane defined by this C atom and the adjacent C and O atoms and the mean plane of the dihydropyran ring excluding the phenyl-substituted C atom is 25.1 (3)°. The dihedral angle between the mean plane of the chromene unit and the phenyl ring is 85.7 (1)°. The crystal structure features C-HO hydrogen bonds and BrO contacts [3.289 (3) Å] involving the nitro O atoms.
For the preparation of analogs of the title compound, see: Yan et al. (2001); Pateliya et al. (2009). For synthetic uses of the analogs and bioactive derivatives of the title compound, see: Furuta et al. (2007); Pateliya et al. (2009).
Data collection: APEX2 (Bruker, 2008); cell refinement: SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: ZL2545 ).
We thank the Natural Science Foundation of China (grant No. 21172262) for financial support.
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