Synthesis and Antioxidant Activity of a Novel Series of Pyrazolotriazine, Coumarin, Oxoazinone, and Pyrazinopyrimidine Derivatives
作者:Moustafa A. Gouda
DOI:10.1002/ardp.201300128
日期:2013.8
afforded the corresponding coumarins 21–23, respectively. Finally, compound 1 reacted with 1‐nitrosonaphthalen‐2‐ol (26) and 6‐amino‐5‐nitroso‐2‐thioxo‐2,3‐dihydropyrimidin‐4(1H)‐one (28) to give 3‐oxo‐3H‐naphtho[2,1‐b][1,4]oxazine‐2‐carbonitrile (25) and pyridazinopyrimidine (29), respectively. The newly synthesized compounds were screened for their ABTS antioxidant activity. Compounds 7 (90.39%), 10
通过将 3-(3,5-二甲基-1H-吡唑-1-基)-3-氧代丙腈 (1) 与 3-吡唑重氮氯化物 2-4 偶联,然后加热,获得一系列吡唑并三酮衍生物 8-10分别在乙酸中形成的腙5-7。此外,1与芳基重氮盐15a-c的偶联反应得到腙16a-c。此外,用 2-羟基-1-醛 18-20 处理 1 分别得到相应的香豆素 21-23。最后,化合物 1 与 1-nitrosonaphthalen-2-ol (26) 和 6-amino-5-nitroso-2-thioxo-2,3-dihydropyrimidin-4(1H)-one (28) 反应得到 3-oxo- 3H-萘并[2,1-b][1,4]恶嗪-2-甲腈(25)和哒嗪并嘧啶(29)。筛选新合成的化合物的 ABTS 抗氧化活性。化合物 7 (90.39%)、10 (85.88%) 和 16a (91. 95%) 表现出有希望的活动。最有效的化合物