2-(5,6-Dihydrobenzimidazo[1,2-c]quinazolin-6-yl)-5-methylphenol

In the title compound, C21H17N3O, the imidazole ring is essentially planar, with a maximum deviation of 0.009 (1) Å. The molecule is disordered over two sites corresponding to a rotation of approximately 180° with a refined occupancy ratio of 0.9180 (14):0.0820 (14). The central pyrimidine ring makes dihedral angles of 5.02 (5), 3.97 (5) and 6.28 (5)°, respectively, with the planes of the imidazole and the terminal phenyl rings for the major component; the values for the minor component are 5.8 (7), 5.0 (6) and 8.5 (6)°, respectively. Part of the observed planarity is accounted for in terms of an intramolecular N—H⋯O hydrogen bond. In the crystal, molecules of the major component are connected by O—H⋯N hydrogen bonds, forming supramolecular chains along the c axis.

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