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Acta Cryst. (2013). E69, o272
[ doi:10.1107/S1600536813000743 ]

14-Ethoxy-4,6,9-trimethyl-8,12-dioxa-4,6-diazatetracyclo[8.8.0.02,7.013,18]octadeca-2(7),13,15,17-tetraene-3,5,11-trione

G. Jagadeesan, D. Kannan, M. Bakthadoss and S. Aravindhan

Abstract: In the title compound, C19H20N2O6, the pyrone and pyran rings adopt envelope conformations with the same common C atom as the flap, the dihedral angle between the planes of the remaining ring atoms being 68.27 (4)°. The planar atoms of the pyran ring and the diazacyclic ring are almost coplanar, the dihedral angle between their mean planes being 3.29 (7)°. Moreover, the planar atoms of the pyrone ring and benzene ring of the coumarin unit are also close to coplanar, the dihedral angle between their mean planes being 8.03 (9)°. The methoxy group lies in the plane of the benzene ring, with a dihedral angle between their mean planes of 9.4 (2)°. In the crystal, the molecules are linked by C-H...O hydrogen bonds resulting in sheets of molecules in the ac plane.


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