Synthesis of Novel and Highly Functionalized 4-hydroxycoumarin Chalcone and their Pyrazoline Derivatives as Anti-Tuberculosis Agents
作者:Mohammad Asad、Farzana Beevi、Suresh Pandian Ganesan、Chuan-Wei Oo、Raju Suresh Kumar、Venu Laxmipathi、Hasnah Osman、Mohamed Ashraf Ali
DOI:10.2174/15701808113109990055
日期:2013.12.31
Condensation of ketones 1a-b with deferent aldehydes 2a-e gives chalcones 3a-j. These chalcones on
cyclization with hydrazine hydrate/ phenylhydrazine in the presence of glacial acetic acid give the corresponding
pyrazolines 4a-t. The structures of new compounds have been established by extensive IR, NMR and X-ray crystallographic
studies and were assayed for their antitubercular activity against M. tuberculosis H37Rv and INH resistant M. tuberculosis
strains using agar dilution method. Among the both derivative compounds, 4-hydroxy-3-(5-(4-
trifluoromethyl)phenyl)-4,5-dihydro-1H-pyrazol-3-yl-2H-chromen-2-one 4m produced the highest efficacy, exhibited
90% inhibition against MTB at a concentration of 4.94 µM and against INHR-MTB at 14.78 µM.
酮1a-b与不同的醛2a-e缩合得到查尔酮3a-j。这些查耳酮
在冰醋酸存在下,与水合肼/苯肼环化,得到相应的
吡唑啉4a-t。新化合物的结构已通过广泛的 IR、NMR 和 X 射线晶体学确定
研究并测定了它们对结核分枝杆菌 H37Rv 和 INH 耐药结核分枝杆菌的抗结核活性
菌株采用琼脂稀释法。在这两种衍生化合物中,4-羟基-3-(5-(4-
三氟甲基)苯基)-4,5-二氢-1H-吡唑-3-基-2H-苯并吡喃-2-酮 4m 产生最高功效,表现出
浓度为 4.94 µM 时,对 MTB 的抑制率为 90%;浓度为 14.78 µM 时,对 INHR-MTB 的抑制率为 90%。