(E)-3-[3,4-Bis(methoxymethoxy)phenyl]-1-(7-hydroxy-5-methoxy-2,2-dimethylchroman-8-yl)prop-2-en-1-one

Abstract

The reaction of 5,6-(2,2-dimethyl­chroman­yl)-2-hy­droxy-4-meth­oxy­acetophenone and 3,4-bis­(meth­oxy­meth­yloxy)benzaldehyde affords the intense orange title chalcone derivative, C25H30O8. The two benzene rings are connected through a —C(=O)—CH=CH— (propenone) unit, which is in an E conformation; the ring with the hy­droxy substitutent is aligned at 19.5 (2)° with respect to this unit, whereas the ring with the meth­oxy­meth­yloxy substituent is aligned at 9.3 (3)°. The dihedral angle between the rings is 19.38 (10)°. The hy­droxy group engages in an intra­molecular O—H⋯O hydrogen bond with the carbonyl O atom of the propenone unit, generating an S(5) ring.