Received 1 August 2013
In the title compound, C25H20N6O2·0.15H2O, the dihedral angles between the least-squares planes of the indole and pyrrolidine rings and between the oxindole and imidazole rings are 77.66 (7) and 45.31 (7)°, respectively. The pyrrolidine ring and the fused five-membered pyrrolidine ring of the oxindole moiety exhibit twisted conformations. The amide N atom is involved in both intra- and intermolecular hydrogen bonding, having a bifurcated character. The molecular structure is characterized by an intramolecular N-HO hydrogen bond, which generates an S(7) ring motif while an intermolecular N-HO hydrogen bond links the organic and solvent water molecules. In the crystal, N-HN hydrogen bonds generate a zigzag chain running parallel to c-axis direction. The H atoms of the solvent water molecule were not located.
For background to indole derivatives and their biological activity, see: Rudrangi et al. (2011). For puckering parameters, see: Cremer & Pople (1975). For bond-length data, see: Allen et al. (1987). For graph-set notation, see: Bernstein et al. (1995). For a related structure, see: Inglebert et al. (2013).
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: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RK2411 ).
The authors gratefully acknowledge Dr Babu Varghese, SAIF, IIT, Chennai, India, for the data collection.
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