Abstract
The title compound, C23H24O6, crystallizes with two independent molecules (A and B) in the asymmetric unit. The dihedral angles between the benzopyran ring and the α,β-unsaturated ketone unit and between the α,β-unsaturated ketone group and the benzene ring are 9.4 (10) and 12.96 (13)°, respectively, in molecule A and 1.40 (17) and 4.44 (17)°, respectively, in molecule B. The two methoxy groups at the meta positions of the benzene ring are close to being coplanar with the ring [C—O—C—C = 6.2 (3) and −1.4 (3)° in molecule A and −4.2 (4) and 3.7 (3)° in molecule B], whereas the third methoxy group, at the para position, is (+)-anticlinal with respect to the benzene ring [C—O—C—C = 81.7 (3)°] in molecule A and is (−)-synclinal with respect to the benzene ring [C—O—C—C = −103.2 (3)°] in molecule B. In both independent molecules, the hydroxy group is involved in an intramolecular O—H⋯O hydrogen bond.
Highlights
The title compound, C23H24O6, crystallizes with two independent molecules (A and B) in the asymmetric unit
The dihedral angles between the benzopyran ring and the, -unsaturated ketone unit and between the, -unsaturated ketone group and the benzene ring are 9.4 (10) and 12.96 (13), respectively, in molecule A and 1.40 (17) and 4.44 (17), respectively, in molecule B
The dihedral angles between the benzopyran ring and the α,β-unsaturated ketone unit and between the α,β-unsaturated ketone group and the benzene ring are 9.42 (99) and 12.96 (13)°
Summary
University, Chengdu 610041, People’s Republic of China, and bDepartment of Pharmaceutical and Bioengineering, School of Chemical Engineering, Sichuan. The dihedral angles between the benzopyran ring and the , -unsaturated ketone unit and between the , -unsaturated ketone group and the benzene ring are 9.4 (10) and 12.96 (13) , respectively, in molecule A and 1.40 (17) and 4.44 (17) , respectively, in molecule B. The two methoxy groups at the meta positions of the benzene ring are close to being coplanar with the ring [C—. 3.7 (3) in molecule B], whereas the third methoxy group, at the para position, is (+)-anticlinal with respect to the benzene ring [C—O—C—C = 81.7 (3) ] in molecule A and is ( )-synclinal with respect to the benzene ring [C—O—C—C. The authors thank Mr Zhi-Hua Mao of Sichuan University for the X-ray data collection. Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FL2342)
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