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Acta Cryst. (2013). E69, o717
[ doi:10.1107/S1600536813009719 ]

3-Acetyl-2-methyl-4-(pyridin-3-yl)-1,4-dihydroindeno[1,2-b]pyridin-5-one

I. Bisenieks, A. Mishnev, I. Bruvere, B. Vigante and Z. Andzans

Abstract: In the title compound, C20H16N2O2, the condensed tricyclic fragment is near to planar, with an r.m.s. deviation of 0.0531 Å. The 1,4-dihydropyridine (1,4-DHP) ring adopts a slightly puckered boat-like conformation. The N and opposite C atoms deviate from the least-squares plane of the four other ring atoms by 0.039 (3) and 0.141 (3) Å, respectively. The C=O group located at the tricyclic fragment is fixed in an s-trans orientation, while the second C=O group adopts an s-cis orientation with respect to the double bonds of the 1,4-DHP ring. The pyridine ring has a pseudo-axial orientation with respect to the 1,4-DHP ring. The dihedral angle between the tricyclic system and the pyridine ring is 77.3 (3)°. In the crystal, the pyridine N atom accepts a hydrogen bond from the N-H group of the 1,4-DHP ring. The hydrogen bonds link the molecules into infinite C(8) chains along the b-axis direction.


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