Seven compounds (1–7) based on gallate were synthesized and characterized by elemental analysis, 1H NMR, and MS spectra. 2-(3,5-Dibenzyloxy-4-methoxy)phenyl-2-propanol (6) was a new compound. Methyl 3,5-dihydroxy-4-methoxybenzoate (3), methyl 3,5-dibenzyloxy-4-methoxybenzoate (4), 3,5-dibenzyloxy-4-methoxybenzyl alcohol (5), and compound 6 were structurally determined by single-crystal X-ray diffraction for the first time. Crystallographic data for 3: space group P212121; a = 4.0750(8) Å, b = 7.5880(15) Å, c = 29.802(6) Å; V = 921.5(3) Å3; Z = 4. 4: space group P-1; a = 10.068(2) Å, b = 10.499(2) Å, c = 11.388(2) Å; α = 76.84(3)°, β = 66.79(3)°, γ = 64.10(3)°; V = 993.0(3) Å3, Z = 2. 5: space group P-1; a = 8.1410(16) Å, b = 8.7590(18) Å, c = 12.879(3) Å; α = 91.66(3)°, β = 94.69(3)°, γ = 91.73(3)°; V = 914.4(3) Å3; Z = 2. 6: space group P21/c; a = 5.8100(12) Å, b = 15.778(3) Å, c = 23.237(5) Å; β = 96.09(3)°; V = 2118.1(7) Å3; Z = 4. All of the seven compounds were evaluated for the inhibition of growth of human hepatoma (HepG2) cells. Comparison with the positive-control 5-fluorouracil (IC50 51.6 µmol/L), 5 showed stronger cytotoxic activity with an IC50 around 15.3 µmol/L, while IC50 value of 3 was 90.3 µmol/L. The effect of slight structural variations in this series of compounds was found to cause a marked change in their activity against HepG2 cells.Key words: gallates, benzyl alcohol, human hepatoma cells, crystal structure, anti-cancer activities.
合成了七种基于没食子酸酯的化合物(1-7),并通过元素分析、1H NMR 和 MS 光谱对其进行了表征。2-(3,5-二苄氧基-4-甲氧基)苯基-2-丙醇(6)是一种新化合物。首次通过单晶 X 射线衍射测定了 3,5-二羟基-4-甲氧基苯甲酸甲酯(3)、3,5-二苄氧基-4-甲氧基苯甲酸甲酯(4)、3,5-二苄氧基-4-甲氧基苯甲醇(5)和化合物 6 的结构。3 的晶体数据:空间群 P212121;a = 4.0750(8) Å,b = 7.5880(15) Å,c = 29.802(6) Å;V = 921.5(3) Å3;Z = 4。4:空间群 P-1;a = 10.068(2)埃,b = 10.499(2)埃,c = 11.388(2)埃;α = 76.84(3)°,β = 66.79(3)°,γ = 64.10(3)°;V = 993.0(3) Å3,Z = 2。5:空间群 P-1;a = 8.1410(16) Å,b = 8.7590(18) Å,c = 12.879(3) Å;α = 91.66(3)°,β = 94.69(3)°,γ = 91.73(3)°;V = 914.4(3) Å3;Z = 2。6:空间群 P21/c;a = 5.8100(12)埃,b = 15.778(3)埃,c = 23.237(5)埃;β = 96.09(3)°;V = 2118.1(7)埃3;Z = 4。对所有七种化合物抑制人肝癌(HepG2)细胞生长的能力进行了评估。与阳性对照 5-氟尿嘧啶(IC50 51.6 µmol/L)相比,5 显示出更强的细胞毒性活性,IC50 约为 15.3 µmol/L,而 3 的 IC50 值为 90.3 µmol/L。在这一系列化合物中,发现轻微的结构变化会导致它们对 HepG2 细胞的活性发生显著变化。