Received 4 March 2013
aDepartment of Organic Chemistry, Baku State University, Baku, Azerbaijan,bDepartment of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran, and cStructural Dynamics of (Bio)Chemical Systems, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
Correspondence e-mail: firstname.lastname@example.org
In the title compound, C21H24BrNO4, the dihedral angle between the heterocyclic ring and the pendant aromatic ring is 80.20 (13)°. The hexahydroquinone [i.e. the one with the C=O group] ring adopts a sofa conformation. An intramolecular O-HO hydrogen bond generates an S(6) ring motif. The ethyl group is disordered over two sets of sites with a refined site occupancy ratio of 0.633 (10):0.366 (10). In the crystal, molecules are linked by N-HO interactions, forming chains parallel to . There are no significant C-H or - interactions in the crystal structure.
For standard bond lengths, see: Allen et al. (1987). For hydrogen-bond motifs, see: Bernstein et al. (1995). For background to hexahydroquinoline compounds and their applications, see: Sausins & Duburs (1988); Nakayama & Kasoaka (1996); Klusa (1995). For the synthesis of related compounds, see: Kumar et al. (2008); Song et al. (2012).
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RZ5051 ).
The authors thank the Chemistry Department, Baku State University, for providing the X-ray diffraction facility.
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