Received 2 July 2012
aDepartment of Physics, Dr MGR Educational and Research Institute, Dr MGR University, Chennai 600 095, India,bDepartment of Physics, RKM Vivekananda College (Autonomous), Chennai 600 004, India, and cDepartment of Organic Chemistry, University of Madras, Maraimalai Campus, Chennai 600 025, India
Correspondence e-mail: firstname.lastname@example.org
In the title compound, C34H35NO7S, the acenaphthylene unit is essentially planar (r.m.s. deviation = 0.0335 Å). The pyrrolothiazole ring system is folded about the bridging N-C bond; the thiazolidine and pyrrolidine rings adopt S- and C-envelope conformations, respectively, with a `butterfly' angle between the mean planes of 51.38 (10)°. The dioxolane and tetrahydrofuran rings adopt O- and a C-envelope conformations, respectively, with a `butterfly' angle between the mean planes of 57.12 (10)°. Two C atoms are each disordered over two positions with site-occupancy factors of 0.450 (7) and 0.550 (7). The crystal packing is stabilized by C-HO interactions, generating an R22(14) graph-set ring motif.
For the biological properties of spiroheterocycles, see: Kilonda et al. (1995); Ferguson et al. (2005). For a related structure, see: Jagadeesan et al. (2012). For graph-set notation, see: Bernstein et al. (1995).
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 (Farrugia, 1997); 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: PV2565 ).
The authors thank Dr Babu Varghese, SAIF, IIT, Chennai, India, for the data collection.
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