Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 4 (April 2013)


organic compounds



ff2099 scheme

Acta Cryst. (2013). E69, o484    [ doi:10.1107/S1600536813005734 ]

1-(5-Hydroxy-2,2,8,8-tetramethyl-2H,8H-pyrano[2,3-f]chromen-6-yl)-3-(4-methoxyphenyl)prop-2-en-1-one

S. Pawar, K. Gopaul, T. Moodley, B. Omondi and N. Koorbanally

Abstract: In the biologically active title compound, C26H26O5, the pyran ring of the chromene unit adopts a half-chair conformation. The C=C double bond of the propenone unit exhibits a trans conformation and the carbonyl group is syn conformation to the double bond. The dihedral angle between the benzene ring and the benzopyranone moiety is 31.54 (4)°. The molecular structure is stabilized by an intramolecular C=O...H-O hydrogen bond.


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