Crystal Structure of 3-Hydroxy-3′,4′-Methylenedioxy Flavone-6-Carboxylic Acid Dimethylformamide Solvate.

The optically pure 3-hydroxy-3′,4′-methylenedioxy flavone-6-carboxylic acid was obtained through the chalcone route. The structure of 3-hydroxy-3′,4′-methylenedioxy flavone-6-carboxylic acid was first elucidated by single crystal X-ray analysis: triclinic, space group, triclinic ( P-1) with a = 8.1379(13) Å, b = 8.9831(14) Å, c = 13.198(2) Å, α = 88.413(2)°, β = 74.908(2)°, γ = 72.987(2)°. V = 889.5(2) Å3, Z = 2. The structure was solved by direct methods and refined to a final R = 0.0413 for 1630 reflections with I > 2 σ( I). The crystal structure is stabilized by O–H···O and C–H···O hydrogen bondings and π–π stacking interactions. The titled compound, 3-hydroxy-3′,4′-methylenedioxy flavone-6-carboxylic acid dimethylformamide solvate, was linked to one-dimensional molecular ribbons via intermolecular O–H···O and C–H···O hydrogen bondings.[Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]