Synthesis, In-Vitro Antibacterial, Antifungal, and Molecular Modeling of Potent Anti-Microbial Agents with a Combined Pyrazole and Thiophene Pharmacophore
作者:Yahia Mabkhot、Nahed Kaal、Seham Alterary、Salim Al-Showiman、Assem Barakat、Hazem Ghabbour、Wolfgang Frey
DOI:10.3390/molecules20058712
日期:——
Ethyl 5-acetyl-4-methyl-2-(phenylamino)thiophene-3-carboxylate (2) and there derivatives 3a–c, 4, 6a–c and 9a–f were synthesized. The structure of compound 2 was deduced by 1H-NMR, 13C-NMR, FT-IR, MS, microanalysis, and single-crystal X-ray crystallography. The compound crystallized in the monoclinic system, with space group P21/c and cell coordinates a = 8.5752(16) Å, b = 21.046(4) Å, c = 8.2941(12) Å, β = 101.131(6)°, V = 1468.7(4) Å3, and Z = 4. Compounds 2, 3a–c, 4, 5a–c and 9a–f were subjected into in vitro antimicrobial activity tests. Compounds 3a and 3c were more potent than standard drug amphotericin B, showing MIC values of 23.8 ± 0.42 and 24.3 ± 0.68, respectively, against Aspergillus fumigatus while the standard drug MIC was 23.7 ± 0.1. Compound 3c was also more potent (MIC 24.8 ± 0.64) than the standard drug amphotericin B (MIC 19.7 ± 0.2) against Syncephalastrum racemosum. Compounds 4 and 9f also showed promising anti-microbial activity. Molecular modeling was performed for the most active compounds.
合成了 5-乙酰基-4-甲基-2-(苯基氨基)噻吩-3-羧酸乙酯(2)及其衍生物 3a-c、4、6a-c 和 9a-f。化合物 2 的结构是通过 1H-NMR、13C-NMR、FT-IR、MS、显微分析和单晶 X 射线晶体学推导出来的。化合物呈单斜晶系,空间群为 P21/c,晶胞坐标为 a = 8.5752(16) Å, b = 21.046(4) Å, c = 8.2941(12) Å, β = 101.131(6)°, V = 1468.7(4) Å3, Z = 4。对化合物 2、3a-c、4、5a-c 和 9a-f 进行了体外抗菌活性测试。化合物 3a 和 3c 比标准药物两性霉素 B 更有效,对烟曲霉的 MIC 值分别为 23.8 ± 0.42 和 24.3 ± 0.68,而标准药物的 MIC 值为 23.7 ± 0.1。与标准药物两性霉素 B(MIC 为 19.7 ± 0.2)相比,化合物 3c 的药效(MIC 24.8 ± 0.64)也更强。化合物 4 和 9f 也显示出良好的抗微生物活性。对最具活性的化合物进行了分子建模。