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Free keywords:
single-crystal X-ray study; T = 294 K; mean (C–C) = 0.004 A°;
disorder in main residue; R factor = 0.050; wR factor = 0.136; data-to-parameter ratio = 18.8.
Abstract:
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-H...O 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-H...O interactions, forming chains parallel to [101]. There are no significant C-H...[pi] or [pi]-[pi] interactions in the crystal structure.
