(E)-3-(2H-1,3-Benzodioxol-5-yl)-1-(7-hy-droxy-5-meth-oxy-2,2-dimethyl-chroman-8-yl)prop-2-en-1-one.

Acta Crystallogr Sect E Struct Rep Online 2011 Sep 11;67(Pt 9):o2301. Epub 2011 Aug 11.

The reaction of 5,6-(2,2-dimethyl-chromane)-2-hy-droxy-4-meth-oxy-acetophenone and 3,4-methlene-dioxy-benzaldehyde affords the title chalcone derivative, C(22)H(22)O(6). The two benzene rings are connected through a -C(=O)-CH=CH- (propenone) unit, which is in an E conformation; the ring with the hy-droxy substitutent is aligned at 6.2 (1)° with respect to this unit, whereas the ring with the methyl-enedi-oxy substituent is aligned at 8.2 (1)°. The dihdral angle between the rings is 14.32 (7)°. The hy-droxy group engages in an intra-molecular hydrogen bond with the carbonyl O atom of the propenone unit, generating an S(5) ring.

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Source
http://dx.doi.org/10.1107/S1600536811031321DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200850PMC
September 2011

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