- Design, synthesis and mechanistic study of novel diarylpyrazole derivatives as anti-inflammatory agents with reduced cardiovascular side effects
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Novel diarylpyrazole (5a-d, 6a-e, 12, 13, 14, 15a-c and 11a-g) derivatives were designed, synthesized and evaluated for their dual COX-2/sEH inhibitory activities via recombinant enzyme assays to explore their anti-inflammatory activities and cardiovascular safety profiles. Comprehensively, the structures of the synthesized compounds were established via spectral and elemental analyses, followed by the assessment of both their in vitro COX inhibitory and in vivo anti-inflammatory activities. The most active compounds as COX inhibitors were further evaluated for their in vitro 5-LOX and sEH inhibitory activities, alongside with their in vivo analgesic and ulcerogenic effects. Compounds 6d and 11f showed excellent inhibitory activities against both COX-2 and sEH (COX-2 IC50 = 0.043 and 0.048 μM; sEH IC50 = 83.58 and 83.52 μM, respectively). Moreover, the compounds demonstrated promising results as anti-inflammatory and analgesic agents with considerable ED50 values and gastric safety profiles. Remarkably, the most active COX inhibitors 6d and 11f possessed improved cardiovascular safety profiles, if compared to celecoxib, as shown by the laboratory evaluation of both essential cardiac biochemical parameters (troponin-1, prostacyclin, tumor necrosis factor-α, lactate dehydrogenase, reduced glutathione and creatine kinase-M) and histopathological studies. On the other hand, docking simulations confirmed that the newly synthesized compounds displayed sufficient structural features required for binding to the target COX-2 and sEH enzymes. Also, in silico ADME studies prediction and drug-like properties of the compounds revealed favorable oral bioavailability results. Collectively, the present work could be featured as a promising future approach towards novel selective COX-2 inhibitors with declined cardiovascular risks.
- Abdel-Fattah, Maha M.,Abusabaa, Ahmed H. A.,Amin, Noha H.,El-Saadi, Mohammed T.,Hamed, Mohammed I. A.
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- Synthesis, cyclooxygenase inhibition and anti-inflammatory evaluation of new 1,3,5-triaryl-4,5-dihydro-1H-pyrazole derivatives possessing methanesulphonyl pharmacophore
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A new series of 1,3,5-triaryl-4,5-dihydro-1H-pyrazole derivatives 13a–p were synthesized via aldol condensation of 3/4-nitroacetophenones with appropriately substituted aldehydes followed by cyclization of the formed chalcones with 4-methanesulfonylphenylhydrazine hydrochloride. All the synthesized compounds were evaluated for their cyclooxygenase (COX) inhibition, anti-inflammatory activity and ulcerogenic liability. All compounds were more potent inhibitors for COX-2 than COX-1. While most compounds showed good anti-inflammatory activity, compounds 13d, 13f, 13k and 13o were the most potent derivatives (ED50 = 66.5, 73.4, 79.8 and 70.5 μmol/kg, respectively) in comparison with celecoxib (ED50 = 68.1 μmol/kg). Compounds 13d, 13f, 13k and 13o (ulcer index = 3.89, 4.86, 4.96 and 3.92, respectively) were 4–6 folds less ulcerogenic than aspirin (ulcer index = 22.75) and showed approximately ulceration effect similar to celecoxib (ulcer index = 3.35). In addition, molecular docking studies were performed for compounds 13d, 13f, 13k and 13o inside COX-2 active site which showed acceptable binding interactions (affinity in kcal/mol ?2.1774, ?6.9498) in comparison with celecoxib (affinity in kcal/mol ?6.5330).
- Abdellatif, Khaled R. A.,Elsaady, Mohammed T.,Abdel-Aziz, Salah A.,Abusabaa, Ahmed H. A.
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p. 1545 - 1555
(2016/10/09)
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- Synthesis, characterization and biological evaluation of some new isoxazoline derivatives
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Isoxazoline represents a unique class of nitrogen- and oxygen-containing five-membered heterocycles, a class of compounds of great importance in biological chemistry. Isoxazoline is considered as one of the most potent antimicrobial compound. Isoxazoline
- Jain, Dinesh K.,Goyal, Neeraj,Bhadoriya, Upendra
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p. 789 - 792
(2013/05/22)
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- Effect of ring A and ring B substitution on the cytotoxic potential of pyrazole tethered chalcones
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Chalcone is an aromatic ketone that forms the central core for a variety of important biological compounds, which are collectively known as chalcones. The cytotoxic potential of chalcones which consists of C6-C 3-C6 units gets enhanced by the incorporation of pyrazole ring as proved by our earlier studies. Thus in the present work, pyrazoles of chalcones with ring A substituted by furan, naphthalene and variety of substituted phenyl rings has been prepared and evaluated for in vitro cytotoxic activity against PC-3, OVCAR, IMR-32, HEP-2 human cancer cell lines. Springer Science+Business Media, LLC 2011.
- Nepali, Kunal,Kadian, Kanika,Ojha, Ritu,Dhiman, Rajni,Garg, Atul,Singh, Gagandip,Buddhiraja, Abhishek,Bedi, Preet Mohinder Singh,Dhar, Kanaya Lal
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p. 2990 - 2997
(2012/10/29)
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- Synthesis and characterization of 4,6-diaryl-4,5-dihydro-2H-indazol-3-ols and 4,6-diaryl-2-phenyl-4,5-dihydro-2H-indazol-3-ols - A new series of fused indazole derivatives
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A novel class of 4,6-diaryl-4,5-dihydro-2H-indazol-3-ols and 4,6-diaryl-2-phenyl-4,5-dihydro-2H-indazol-3-ols is synthesized and characterized by melting point, elemental analysis, MS, FT-IR, 1H and 13C NMR, D2O exchanged 1H NMR, and two-dimensional HSQC spectra.
- Gopalakrishnan,Thanusu,Kanagarajan
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p. 950 - 955
(2009/04/16)
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- Synthesis and antimicrobial activity of some 1-(2,4-dinitrophenyl)-3-(3- nitrophenyl)-5-(4-substituted phenyl)-4-bromo-2-pyrazolines and 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-2-pyrazolin-4- ones
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A series of 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-2-pyrazolin-4-ones (4ae) have been synthesized by the oxidation of 1-(2,4-dinitrophenyl)-3-(3-nitrophenyl)-5-(4-substituted phenyl)-4-bromo-2- pyrazolines (3a-e) with dimethylsulfoxide. The structure has been established on the basis of spectral data (IR,1H NMR). The synthesized compounds have been screened in vitro for their possible antimicrobial activity.
- Mishra, Sagar K.,Sahoo, Sabuj,Panda, Prasana K.,Mishra, Satya R.,Mohanta, Raj K.,Ellaiah, Poluri,Panda, Chandra S.
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p. 359 - 364
(2008/09/19)
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- Synthesis and antimicrobial activity of 1-(4-chlorophenyl)-3-(4-methoxy/3,4-dimethoxyphenyl)propan-1,3-diones and their 2-analogs
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The condensation of substituted acetophenones 1-5 with 4-methoxy- or 3,4-dimethoxy-benzaldehyde (6,7) in ethanolic NaOH gives the corresponding substituted 2-propen-1-ones (8-17) which on bromination yields substituted propan-1-ones (18-27).Refluxing of 1
- Singh, Rajvir,Malik, Om Parkash
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p. 455 - 459
(2007/10/02)
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