| Abstract: The fat-soluble isoflavone derivatives: 5-methyl-7-hydroxy-4′-methoxyisoflavone (L2) were synthesized and their structures were characterized by IR, UV, 1H NMR, single crystal X-ray diffraction and elemental analysis. The scavenging activities of L2 on superoxide anion free radical and 1,1-diphenyl-2-picrylhy-drazyl free radical (DPPH·) were measured by ultraviolet spectrophotometry. The experiment result shows that, the crystal (C17H14O4) belongs to triclinic space group P1 with unit cell constants a=0.822 55(2) nm, b=0.931 23(2) nm, c=1.045 47(2) nm, α=89.043(2)°, β=69.195 0(10)°, γ=66.979 0(10)°, V=0.681 99(3) nm3, Z=2, Dc=1.375 g·cm-3, F(000)=296, R=0.044 4, wR=0.115 6. The compound L2 can scavenge 1,1-diphenyl-2-picrylhy-drazyl free radical (DPPH·) and superoxide anion free radical effectively. CCDC: 821767. |
