Received 9 November 2008
In the title compound, C19H19BrN2O2S, the central thienopyrimidine ring system is essentially planar, with a maximum displacement of 0.068 (3) Å. The attached cyclohexene ring adopts a half-chair conformation. The molecular conformation and crystal packing are stabilized by three intramolecular C-HO hydrogen bonds and two C-H interactions.
For background to the use of pyrimidine derivatives as drugs, see: Ding et al. (2004). For a description of the Cambridge Structural Database, see: Allen (2002). For a related structure, see: Zeng et al. (2006).
Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2001); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: AT2674 ).
We gratefully acknowledge financial support of this work by the Research Foundation for Students and Teachers of Yunyang Medical College (grant Nos. 2007QDJ15, 2007ZQB19, 2007ZQB20).
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