Synthesis and antibacterial activity of some 5-hydroxy-5-trifluoromethyl-4,5-dihydropyrazol-1-thiocarboxamides, 3-trifluoromethylpyrazol-1-thiocarboxamides and 4-aryl-2-(5(3)-trifluoromethyl-1-pyrazolyl)thiazoles
作者:Ranjana Aggarwal、Rajiv Kumar、Sunil Kumar、Gaurav Garg、Ritu Mahajan、Jitender Sharma
DOI:10.1016/j.jfluchem.2011.07.029
日期:2011.11
4-aryl-(5-trifluoromethyl-pyrazol-1-yl)thiazoles 6 and 4-aryl-(3-trifluoromethyl-pyrazol-1-yl)thiazoles 7, respectively. Five 4,5-dihydropyrazoles (3a–e) and two pyrazolylthiazoles (6a and 6c) were tested against one Gram-positive and one Gram-negative bacteria to assess their in vitro antibacterial activity. Compounds 3a, 3b and 3e showed moderate antibacterial activity against Gram-positive bacterium,
5-羟基-5-三氟甲基-4,5-二氢吡唑-1-硫代羧酰胺3和3-三氟甲基吡唑-1-硫代羧酰胺4通过在中性和酸性条件下三氟甲基-β-二酮与硫代氨基脲的缩合反应选择性地合成得到用苯甲酰溴5,分别得到4-芳基-(5-三氟甲基-吡唑-1-基)噻唑6和4-芳基-(3-三氟甲基-吡唑-1-基)噻唑7。测试了五种4,5-二氢吡唑(3a – e)和两种吡唑基噻唑(6a和6c)对一种革兰氏阳性细菌和一种革兰氏阴性细菌的体外作用抗菌活性。化合物3a,3b和3e显示出对革兰氏阳性细菌短小芽孢杆菌的中等抗菌活性。