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Acta Cryst. (2013). E69, o40-o41
[ doi:10.1107/S1600536812047976 ]

Ethyl 2,7,7-trimethyl-4-(1-methyl-1H-indol-3-yl)-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate

S. Öztürk Yildirim, R. J. Butcher, M. G. Gündüz, A. El-Khouly, R. Simsek and C. Safak

Abstract: In the title molecule, C24H28N2O3, the cyclohexene ring is in a sofa conformation and the 1,4-dihydropyridine ring is in a slight boat conformation. In the indole ring system, the pyrrole and benzene rings form a dihedral angle of 2.63 (7)°. In the crystal, N-H...O hydrogen bonds connect the molecules into C(6) chains parallel to the b axis and pairs of weak C-H...O hydrogen bonds link inversion-related chains into a ladder motif through R22(18) rings. A weak intramolecular C-H...O hydrogen bond is also observed.

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