Synthesis and evaluation of antioxidant and antibacterial activities of new substituted bis(1,3,4-oxadiazoles), 3,5-bis(substituted) pyrazoles and isoxazoles
作者:Ebraheem Abdu Musad、Riyaz Mohamed、Bahjat Ali Saeed、Bannikuppe S. Vishwanath、K.M. Lokanatha Rai
DOI:10.1016/j.bmcl.2011.04.142
日期:2011.6
4-oxadiazole) derivatives 2(a–h) and 3,5-bis(substituted)pyrazoles, isoxazoles 3(a,b,d–i), 4(a–c) were synthesized via oxidative cyclization of some diaroylhydrazones using chloramine-T and cyclocondensation reaction with hydrazine hydrate and hydroxylamine hydrochloride, respectively. The newly synthesized compounds were screened for antioxidant and anti-microbial activities. Compounds 2(b), 3(b), and 4(a) showed
两个系列的五元杂环双(1,3,4-恶二唑)衍生物2(a – h)和3,5-双(取代)吡唑,异恶唑3(a,b,d – i),4(a – c)是通过使用氯胺-T对某些二芳酰基hydr进行氧化环化,并分别与水合肼和盐酸羟胺进行环缩合反应而合成的。筛选了新合成的化合物的抗氧化剂和抗微生物活性。化合物2(b),3(b)和4(a)在10μg/ ml时显示出较高的抗氧化活性,而化合物2(a),3(a),3(f)和4(a)在100μg/ ml下显示出比标准维生素更好的抗微生物活性分别为C和环丙沙星。通过元素分析和光谱IR,1 H NMR和13 C NMR数据确认了新合成化合物的结构。