%0 Journal Article
%T (6bS*,14R*,14aR*)-Methyl 14-(4-methylphenyl)-7-oxo-6b,6c,7,12b,14,14a-hexahydro-1H-pyrano[3,2-c:5,4-c¡ä]dichromene-14a-carboxylate
%A R. Ponnusamy
%A V. Sabari
%A G. Sivakumar
%A M. Bakthadoss
%J Acta Crystallographica Section E
%D 2013
%I International Union of Crystallography
%R 10.1107/s1600536813001244
%X In the title compound, C28H22O6, the chromeno ring system is almost planar, with a dihedral angle between the mean planes of the pyran and benzene rings of 1.87 (8)¡ã. The pyran ring bearing the methylphenyl substituent has a half-chair conformation while the other pyran ring has an envelope conformation with the tetrasubstituted C atom as the flap. The benzene ring of the chromeno ring system is inclined to the benzene ring fused to the latter pyran ring by 74.66 (9)¡ã. These aromatic rings are inclined to the 4-methylphenyl ring by 52.67 (9) and 66.63 (10)¡ã, respectively. In the crystal, molecules are linked via C¡ªH...O hydrogen bonds, forming a two-dimensional network parallel to the bc plane.
%U http://scripts.iucr.org/cgi-bin/paper?S1600536813001244