7-p-Tolyl-10,11-dihydrobenzo[h]furo[3,4-b]quinolin-8(7H)-one

In the title compound, C22H17NO2, the fused ring system is essentially planar (r.m.s. deviation = 0.021 Å) and the dihedral angle between the dihydropyridine and tolyl rings is 80.98 (11)°. In the crystal, the molecules are linked into chains along the b axis by intermolecular N—H⋯O and C—H⋯O hydrogen bonds. Adjacent chains are linked by π–π interactions [centroid–centroid separation = 3.5748 (15) Å].

In the title compound, C 22 H 17 NO 2 , the fused ring system is essentially planar (r.m.s. deviation = 0.021 Å ) and the dihedral angle between the dihydropyridine and tolyl rings is 80.98 (11) . In the crystal, the molecules are linked into chains along the b axis by intermolecular N-HÁ Á ÁO and C-HÁ Á ÁO hydrogen bonds. Adjacent chains are linked byinteractions [centroid-centroid separation = 3.5748 (15) Å ].
The author thanks the Scientific Research Item of Xuzhou Institute of Technology (grant No. XKY2009114) for financial support.

Special details
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.
Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > σ(F 2 ) is used only for calculating Rfactors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 )
x y z U iso */U eq O1