title: (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.
abstract: 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.
authors: Farediah
authors: F
authors: Ahmad
authors: Nur Athirah
authors: NA
authors: Hashim
authors: Norazah
authors: N
authors: Basar
authors: Khalijah
authors: K
authors: Awang
authors: Seik Weng
authors: SW
authors: Ng