Synthesis of Isoxazoles via 1,3-Dipolar Cycloaddition Reactions: Pharmacological Screening for Their Antioxidant and Antimicrobial Activities
作者:Devirammanahalli Mahadevaswamy Lokeshwari、Kariyappa Ajay Kumar
DOI:10.14233/ajchem.2017.20781
日期:——
In the present study, we report the synthesis of series of novel substituted isoxazoles via 1,3-dipolar cycloaddition reaction. Nitrile oxides generated by the catalytic dehydrogenation of aldoximes by chloramine-T, were trapped in situ by 4-(furan-2-yl)but-3-en-2-one to obtain an isomeric mixture of isoxazoles. The structure of the new isoxazoles were elucidated by spectral and elemental analyses. The synthesized isoxazoles have been screened in vitro for their DPPH radical scavenging abilities and antimicrobial activities. Amongst the synthesized series, compound 1-(3-(4-chlorophenyl)-4-(furan-2-yl)-4,5-dihydroisoxazol-5-yl)ethanone (4f) exhibited excellent radical scavenging and antimicrobial susceptibilities.
在本研究中,我们报道了通过1,3-偶极环加成反应合成一系列新型取代异恶唑。通过氯胺-T催化脱氢反应生成的腈氧化物,原位被4-(呋喃-2-基)丁-3-烯-2-酮捕获,得到异构体混合物的异恶唑。新合成的异恶唑的结构通过光谱和元素分析得到了阐明。合成的异恶唑已在体外筛选其DPPH自由基清除能力和抗微生物活性。在合成的系列中,化合物1-(3-(4-氯苯基)-4-(呋喃-2-基)-4,5-二氢异恶唑-5-基)乙酮(4f)表现出优异的自由基清除作用和抗微生物敏感性。