5499-67-2Relevant academic research and scientific papers
A novel synthetic method of organoselenum compounds
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Paragraph 0122-0126; 0127-0132; 0157-0162, (2021/09/07)
The present application can synthesize a selenopyrano pyrazolone derivative, one of an organic selenium compound, in a simple and excellent yield. Provided is a synthesis method of an organic selenium compound which is eco-friendly at low temperature and
Synthesis of Selenopyrano[2,3- c ]pyrazol-4(1 H)-ones and Their C-H Activation
Choi, In-Hui,Jalani, Hitesh B.,Jeong, Jin-Hyun
supporting information, p. 321 - 325 (2020/12/01)
We disclose the synthesis of selenopyrano[2,3- c ]pyrazol-4(1 H)-ones and their aryl derivatives for the first time by using selenopyran ring formation via an in situ-generated selenide that reacts directly with α-halo-β-ynone-bearing substituted pyrazole
New hydrazone derivatives of pyrazole-4-carboxaldehydes exhibited anti-inflammatory properties
Chen, Qiuyan,Deng, Xianqing,He, Shihui,Li, Sifan,Liang, Yuqiu,Liu, Bing,Song, Mingxia,Yu, Shengwang
, p. 501 - 510 (2020/04/17)
Background: Several series of hydrazone derivatives of pyrazole-4-carboxaldehydes (4-11) were designed and synthesized to screen their inflammatory activity. Methods: The products were characterized by1H NMR,13C NMR and HRMS. In vitro LPS-induced TNF-α model and in vivo xylene-induced ear-edema model were used to evaluate their anti-inflammatory activity. Results and Conclusion: Bioassays indicated that most of the compounds markedly inhibited the expression of TNF-α at the concentration of 10 μg/mL. Compounds 7b and 11c, two of the most potent compounds, exhibited TNF-α inhibitory ability in a dose-dependent manner with IC50 values of 5.56 and 3.69 μM, respectively. In vivo, intraperitoneal administration with 7b and 11c markedly inhibited the ear edema at the doses of 20 and 50 mg/kg. Compound 11c, inhibited edema by 49.59 % at the dose of 20 mg/kg, was comparable to the reference drug dexamethasone at the same dose (with an inhibition of 50.49 %). To understand the binding pattern, molecular docking of representa-tive 7b and 11c was performed, which demonstrated that both compounds have a forceful binding with the TNF-α, and that the phenyl and hydrazide moieties of them play a significant role in binding with the target site.
PyrazoIoquinoline derivative, and preparation method and application thereof
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Paragraph 0056; 0057; 0058; 0059, (2017/07/22)
The invention relates to a pyrazoloquinoline derivative, and a preparation method and an application thereof. The pyrazoloquinoline derivative provided by the invention can be used as an electron/hole transporting material and a illuminant, has strong fluorescence in a liquid and a solid film, can form good amorphous film, and has pretty good heat and light stabilities at the same time.
Green method for the synthesis of chromeno[2,3- C ]pyrazol-4(1 H)-ones through ionic liquid promoted directed annulation of 5-(aryloxy)-1 H -pyrazole-4-carbaldehydes in aqueous media
Li, He,Liu, Chenjiang,Zhang, Yonghong,Sun, Yadong,Wang, Bin,Liu, Wenbo
supporting information, p. 932 - 935 (2015/03/30)
The first classical heterocyclic ionic liquid (IL) promoted C-H bond oxidant cross-coupling reaction for the intramolecular annulation of 5-(aryloxy)-1H-pyrazole-4-carbaldehydes to chromeno[2,3-c]pyrazol-4(1H)-ones has been disclosed. The promoter 1,3-dibutyl-1H-benzo[d][1,2,3]triazol-3-ium bromide can be easily recycled and reused with the same efficacies for at least five cycles in aqueous medium. The strategy works smoothly and provides an applicable protocol to construct a wide range of products.
Synthesis of some novel pyrazolopyridooxazine, pyrazoloquinolizines, pyrazoloindolizine and pyrazolopyranopyrimidinone derivatives
Al-Tilasi, Hissah H.,El-Baih, Fatma E.M.
, p. 3896 - 3902 (2014/08/05)
Different pyrazolone derivatives were prepared as starting materials for the synthesis of pyrazolopyridooxazine, pyrazoloquinolizines, pyrazoloindolizine, 1,4-oxazinopyrazolines and pyrazolopyranopyrimidinone derivatives via reactions with different reagents applying the one pot multicomponent reaction using microwave and ultrasound irradiation in some cases.
Synthesis and antibacterial activity of some novel pyrazolopyridine derivatives
Panda,Karmakar,Jena
experimental part, p. 1500 - 1508 (2012/01/05)
Eight pyrazolo[3,4-b]pyridine derivatives have been synthesized by Friedlaender condensation of 5-aminopyrazole-4-carbaldehyde with active methylene compounds in basic medium. These compounds have been screened for their antibacterial activity against two Gram-negative and two Gram-positive bacterium. Pyrazolopyridines having the carboxamide group at the 5-position showed moderate to good activity against P. aeruginosa, E. coli, S. pneumoniae, and B. cereus.
Synthesis of some 3-(5-chloro-1,3-diaryl-1Hpyrazol-4-yl)-1-arylprop-2-en-1- ones and 1,5-bis(5-chloro-1,3-diaryl-1H-pyrazol-4-yl)pent-1,4-diene-3-ones and their antimicrobial activity
Rani, Archna,Jain, Sapna,Dureja, Prem,Kumar, Rita,Kumar, Anil
, p. 1524 - 1531 (2011/12/02)
New 3-(5-chloro-1, 3-diaryl-1H-pyrazol-4-yl)-1-arylprop-2-en-1-ones (4a-n) and 1, 5-bis(5-chloro-1, 3-diaryl-1H-pyrazol-4-yl)pent-1, 4-diene-3-ones (4o-r) have been synthesized by using aryl-5-chloro-4-formyl-1, 2-pyrazoles (2a-d) as key intermediate, prepared by Vilsmeir-Haack reaction of pyrazolones. The compounds have been screened against multihost plant pathogenic fungi Macrophomina phaseolina and Sclerotium rolfsii and human pathogenic bacteria MTCCB 96 Staphylococcus aureus, MTCCB 1610 Escherichia coli, clinical isolate Citrobacter Sp. And Enterococcus faecium. Some compounds have shown promising activity against these microbes. Regression analysis has also been done for relationship between antifungal activity and oncentration of compounds.
A new route to 5-chloropyrazole-4-carbaldehydes and their behaviour in the Baylis-Hillman reaction
Zhong, Weihui,Chen, Xiao,Shen, Yanyan
experimental part, p. 370 - 374 (2010/11/03)
5-Chloropyrazole-4-carbaldehydes were efficiently prepared via Vilsmeier reaction of 1H-pyrazol-5(4H)-ones with bis(trichloromethyl) carbonate-DMF instead of the traditional POCl3-DMF system. The Baylis-Hillman reaction of these aldehydes with
