Received 29 June 2011
The title pyrrole derivative, C12H17NO4, consists of a pyrrole ring with two diagonally attached methoxycarbonyl groups and two diagonally attached ethyl groups. The two carbonyl groups are approximately in the same plane as the pyrrole ring, making dihedral angles of 3.50 (19) and 6.70 (19)°. In the crystal, adjacent molecules are assembled into dimers in a head-to-head mode by pairs of intermolecular N-HO hydrogen bonds.
For applications of polysubstituted pyrroles, see: Brockmann & Tour (1995); Guilard et al. (2001); Trofimov et al. (2004). For related structures, see: Takaya et al. (2001). For background to complexes of pyrrole derivatives, see: Fan et al. (2008); Ou et al. (2009); Paixão et al. (2003); Yamamoto et al. (1986).
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: PK2335 ).
This work was supported by the Natural Science Foundation of China (No. 21001054) and the Natural Science Fund for Colleges and Universities in Jiangsu Province (No. 10KJB150003)
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