Synthesis and Anti-tubercular Activity of 6-(<i>4</i>-Chloro/Methyl-phenyl)-4- Arylidene-4,5-dihydropyridazin-3(2<i>H</i>)-one Derivatives Against Mycobacterium tuberculosis
作者:Mohammad Asif、Anita Singh
DOI:10.2174/157018081206150507130832
日期:2015.5.7
Two series of 6-(4-Cl-Phenyl)-4-arylidene-4,5-dihydropyridazin-3(2H)-one (3a-e) and 6-
(4-CH3-Phenyl)-4-arylidene-4,5-dihydropyridazin-3(2H)-one derivatives (3f-j) were synthesized and
evaluated as antitubercular agents against Mycobacterium tuberculosis H37Rv strain by using Microplate
Alamar Blue Assay (MABA) method. These compounds (3a-e & 3f-j) were synthesized from
6-(4-Cl-Phenyl)-4,5-dihydropyridazin-3(2H)-one (2a) and 6-(4-CH3-Phenyl)-4,5-dihydropyridazin-
3(2H)-one (2b) compounds by reacting with appropriate aldehydes respectively. All title compounds
(3a-e & 3f-j) were characterized on the basis of IR, 1HNMR, mass spectral and elemental analysis
data. All title compounds (3a-e & 3f-j) were used at 0.2µg/mL to 100µg/mL dose levels for antitubercular activity. Result
showed that all the title compounds (3a-e & 3f-j) exhibited less antitubercular activity as compared to the reference
drugs streptomycin (MIC value of 6.25µg/mL) and pyrizinamide (MIC value of 3.125µg/mL), except compound 3e,
which was equally effective as streptomycin but less effective than pyrazinamide.
合成了两系列6-(4-氯苯基)-4-芳亚甲基-4,5-二氢哒嗪-3(2H)-酮(3a-e)和6-(4-甲基苯基)-4-芳亚甲基-4,5-二氢哒嗪-3(2H)-酮衍生物(3f-j),并采用微量板Alamar蓝法(MABA)对其抗结核活性进行了评价,以耐酸分枝杆菌H37Rv株为模型。这些化合物(3a-e和3f-j)分别由6-(4-氯苯基)-4,5-二氢哒嗪-3(2H)-酮(2a)和6-(4-甲基苯基)-4,5-二氢哒嗪-3(2H)-酮(2b)与适当醛类反应合成。所有目标化合物(3a-e和3f-j)均根据IR、1HNMR、质谱和元素分析数据进行了表征。所有目标化合物(3a-e和3f-j)在0.2µg/mL至100µg/mL剂量水平下用于抗结核活性。结果显示,除化合物3e以外,所有目标化合物(3a-e和3f-j)的抗结核活性均低于参考药物链霉素(MIC值为6.25µg/mL)和吡嗪酰胺(MIC值为3.125µg/mL),化合物3e与链霉素效果相当,但低于吡嗪酰胺。