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,S Aravindhan

doi:10.1107/s1600536813000743

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.

Highlights

The planar atoms of the pyrone ring and benzene ring of the coumarin unit are 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)
The molecules are linked by C—H O hydrogen bonds resulting in sheets of molecules in the ac plane

Summary

Introduction

Absorption correction: multi-scan (SADABS; Bruker 2004) H-atom parameters constrained max = 0.31 e Å3 Key indicators: single-crystal X-ray study; T = 293 K; mean (C–C) = 0.002 Å; R factor = 0.049; wR factor = 0.151; data-to-parameter ratio = 22.9. Atom as the flap, the dihedral angle between the planes of the remaining ring atoms being 68.27 (4) .

Results

Conclusion