Received 30 January 2013
aDepartment of Physics, P.T. Lee Chengalvaraya Naicker College of Engineering and Technology, Kancheepuram 631 502, India,bDepartment of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India, and cPostgraduate and Research Department of Physics, Agurchand Manmull Jain College, Chennai 600 114, India
Correspondence e-mail: email@example.com
The title compound, C30H30O5, is the Diels-Alder adduct from 1,3-diphenylbenzo[c]furan and diethyl maleate. The molecule comprises a fused tricyclic system containing two five-membered rings, which are in envelope conformations with the O atom at the flap, and a six-membered ring adopting a boat conformation. The dihedral angle between the 4-methylphenyl substituents in the 1- and 8-positions is 62.1 (1)°. The ethyl group of one ester group and the ethoxy group of the other ester group are disordered over two sets of sites, with occupancy ratios of 0.43 (2):0.57 (2) and 0.804 (7):0.196 (7), respectively. In the crystal, inversion dimers are formed through pairs of C-HO interactions.
For background to Diels-Alder reactions, see: Akio & Toshiki (2010). For related structures, see: Bailey et al. (1995); Takahashi et al. (2003); Simpson et al. (2004); Toze et al. (2010). For puckering and asymmetry parameters, see: Cremer & Pople (1975); Nardelli (1983).
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); 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) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97, PLATON and publCIF (Westrip, 2010).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IM2419 ).
The authors thank Dr Babu Varghese, SAIF, IIT-Madras, India, for his help with the data collection.
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