We report here the synthesis of a novel series of pyrazole analogs involving the condensation reaction between 5-amino-1H-pyrazole-4-carbonitrile derivatives and carbonyl compounds. The reactions proceeded in acidic media, and were catalyzed by copper oxide nanoparticles (CuO- NPs) which were synthesized under green condition. The tea leaves extract served as green reducing agent for the conversion of copper nitrate to CuO-NPs. The developed methodology afforded the desired products up to 90% yields in 6 h. The newly synthesized compounds were tested for antioxidant properties. Out of 15 newly developed pyrazole compounds, 11 showed better antioxidant activity than the standard antioxidant drug Trolox.
我们在此报告了一系列新型
吡唑类似物的合成,这些类似物是通过5-
氨基-1H-
吡唑-4-碳腈衍
生物与羰基化合物的缩合反应得到的。这些反应在酸性介质中进行,并由绿色合成的
氧化铜纳米颗粒(CuO-NPs)催化。茶叶
提取物作为绿色还原剂,将
硝酸铜转化为CuO-NPs。开发的方法学在6小时内提供了高达90%的目标产率。新合成的化合物经过了抗氧化性质的测试。在15种新开发的
吡唑化合物中,有11种显示出比标准抗氧化药物Trolox更好的抗氧化活性。