(6bS*,14R*,14aR*)-Methyl 14-(4-methyl-phen-yl)-7-oxo-6b,6c,7,12b,14,14a-hexa-hydro-1H-pyrano[3,2-c:5,4-c']dichromene-14a-carboxyl-ate.

S Aravindhan,G Sivakumar,M Bakthadoss,R Ponnusamy,V Sabari

doi:10.1107/s1600536813001244

S Aravindhan, G Sivakumar + Show 3 more

Open Access

https://doi.org/10.1107/s1600536813001244

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Abstract

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)°. 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)°. These aromatic rings are inclined to the 4-methylphenyl ring by 52.67 (9) and 66.63 (10)°, respectively. In the crystal, molecules are linked via C—H⋯O hydrogen bonds, forming a two-dimensional network parallel to the bc plane.

Highlights

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)
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)

Summary

Structure Reports

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). 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). These aromatic rings are inclined to the 4-methylphenyl ring by. Molecules are linked via C—H O hydrogen bonds, forming a two-dimensional network parallel to the bc plane

Data collection

Mo K radiation

Graphite monochromator ω and φ scans

Special details