(E)-3-[3,4-Bis(meth-oxy-methoxy)phen-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):o2300. Epub 2011 Aug 11.

The reaction of 5,6-(2,2-dimethyl-chroman-yl)-2-hy-droxy-4-meth-oxy-acetophenone and 3,4-bis-(meth-oxy-meth-yloxy)benzaldehyde affords the intense orange title chalcone derivative, C(25)H(30)O(8). 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 19.5 (2)° with respect to this unit, whereas the ring with the meth-oxy-meth-yloxy substituent is aligned at 9.3 (3)°. The dihedral angle between the rings is 19.38 (10)°. The hy-droxy group engages in an intra-molecular O-H⋯O hydrogen bond with the carbonyl O atom of the propenone unit, generating an S(5) ring.

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Source
http://scripts.iucr.org/cgi-bin/paper?S160053681103131X
Publisher Site
http://dx.doi.org/10.1107/S160053681103131XDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3200863PMC
September 2011

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