CuO-NPs/TFA: a New Catalytic System to Synthesize a Novel Series of Pyrazole Imines with High Antioxidant Properties
作者:Hanan Mohamed Fathy Elnagdy、Nishi Gandha Gogoi、Jyotirekha G. Handique、Diganta Sarma
DOI:10.1007/s12668-021-00888-5
日期:2021.12
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.
Synthesis of novel pyrazolo[3,4-d]pyrimidine derivatives as potential anti-breast cancer agents
作者:Mohammed K. Abd El Hamid、Marko D. Mihovilovic、Hala B. El-Nassan
DOI:10.1016/j.ejmech.2012.09.031
日期:2012.11
A series of new 1-aryl-4-benzylidenehydrazinyl-3-methylsulphanyl-pyrazolo[3,4-d]pyrimidines 6a–p was synthesized. The cytotoxic activity of the newly synthesized compounds against human breast cancer cell line, MCF7 was investigated. Most of the test compounds showed potent antitumor activity comparable to that of doxorubicin. The 1-phenyl series (6a–i) exhibited better antitumor activity than 1-(4-methoxyphenyl)
合成了一系列新的1-芳基-4-亚苄基肼基-3-甲基磺酰基-吡唑并[3,4- d ]嘧啶6a – p。研究了新合成的化合物对人乳腺癌细胞MCF7的细胞毒活性。大多数测试化合物显示出与阿霉素相当的有效抗肿瘤活性。1-苯基系列(6a – i)表现出比1-(4-甲氧基苯基)系列(6j – p)更好的抗肿瘤活性。4- [2-(4-氟亚苄基)肼基] -3-(甲基磺酰基)-1-苯基-1 H-吡唑并[3,4- d ]嘧啶(6d)是本研究中活性最高的化合物50等于7.5 nM。