Received 25 November 2012
In the title compound, C20H15ClIN3O3, the dihedral angle between the quinazolinone ring system [r.m.s. deviation = 0.047 (2) Å] and the pendant benzene ring is 82.63 (11)°. The molecular conformation is stabilized by intramolecular C-HO interactions. In the crystal, the molecules are linked by N-HO hydrogen bonds into chains along the a-axis direction. Another set of chains propagating along  is formed due to intermolecular ICl short contacts of 3.427 (1) Å, thus giving layers parallel to (010). The layers are connected by C-H and - interactions, the shortest distance between the centroids of aromatic rings being 3.8143 (16) Å.
For crystal structures of dihydropyrimidines, see: Nayak et al. (2010, 2011a,b,c); Venugopala et al. (2012). For applications of dihydropyrimidines, see: Kappe (2000). For halogen-involving interactions, see: Nayak et al. (2011b).
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) and Mercury (Macrae et al., 2008); software used to prepare material for publication: PLATON (Spek, 2009) and PARST (Nardelli, 1995).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: YK2082 ).
The authors thank Durban University of Technology for facilities. KNV thanks the NRF South Africa for a DST/NRF Innovation Postdoctoral Fellowship.
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