Synthesis, molecular docking and anti-inflammatory screening of novel quinoline incorporated pyrazole derivatives using the Pfitzinger reaction II
作者:Said A.H. El-Feky、Zakaria K. Abd El-Samii、Nermine A. Osman、Jasmine Lashine、Mohamed A. Kamel、Hamdy Kh. Thabet
DOI:10.1016/j.bioorg.2014.12.003
日期:2015.2
In continuation of our study of novel quinolines with anti-inflammatory activity using the Pfitzingerreaction, several new quinolinederivatives were synthesized and tested for their anti-inflammatory and ulcerogenic effect. A docking study on the COX-2 binding pocket was carried out for the target compounds to rationalize the possible selectivity of them against COX-2 enzyme. The most active compounds
A series of novel 4,5-dihydropyrazole derivatives containing niacinamide moiety as potential V600E mutant BRAF kinase (BRAF(V600E)) inhibitors were designed and synthesized. Results of the bioassays against BRAF(V600E) and WM266.4 human melanoma cell line showed several compounds to be endowed potent activities with IC50 and GI(50) value in low micromolar range, among which compound 27e, (5-(4-Chlorophenyl)-3-(4-methoxyphenyl)-4,5-dihydro-1H-pyrazol-1-yl)6-methylpyridin-3-yl methanone (IC50 = 0.20 mu M, GI(50) = 0.89 mu M) was bearing the best bioactivity comparable with the positive control Sorafenib. Docking simulation was performed to determine the probable binding model and 3D-QSAR model was built to provide more pharmacophore understanding that could use to design new agents with more potent BRAF(V600E) inhibitory activity. (C) 2012 Published by Elsevier Ltd.
Synthesis and antiviral activity of new pyrazole and thiazole derivatives
作者:Osama I. El-Sabbagh、Mohamed M. Baraka、Samy M. Ibrahim、Christophe Pannecouque、Graciela Andrei、Robert Snoeck、Jan Balzarini、Adel A. Rashad
DOI:10.1016/j.ejmech.2009.03.038
日期:2009.9
New N-acetyl (5-8) and N-thiocarbamoyl (9-12) derivatives of 4,5-dihydropyrazole were synthesized starting from alpha,beta-unsaturated ketones under the effect of hydrazine hydrate and thiosemicarbazide, respectively. N-Thiocarbamoylpyrazole derivatives (9-12) were cyclized using either ethyl bromoacetate or phenacyl bromides to afford the novel pyrazolothiazol-4(5H)-ones (13-16) or pyrazolothiazoles (1724). The antiviral activity for such novel compounds against a broad panel of viruses in different cell cultures revealed that N-acetyl 4,5-dihydropyrazole 7 was the only active one at subtoxic concentrations against vaccinia virus (Lederle strain) in HEL cell cultures with a 50% effective concentration (EC(50)) value of 7 mu g/ml. (C) 2009 Elsevier Masson SAS. All rights reserved.
Design, synthesis and preliminary antiviral screening of new N-phenylpyrazole and dihydroisoxazole derivatives
作者:Adel A. Rashad、Osama I. El-Sabbagh、Mohamed M. Baraka、Samy M. Ibrahim、Christophe Pannecouque、Graciela Andrei、Robert Snoeck、Jan Balzarini、Ahmed Mostafa
DOI:10.1007/s00044-009-9248-y
日期:2010.12
A new series of N-phenylpyrazoles and dihydroisoxazles was synthesized starting from alpha,beta-unsaturated ketones in basic media using phenyl hydrazine and hydroxylamine HCl, respectively. Antiviral evaluation of the target compounds revealed that the dihydroisoxazole derivatives have promising antiviral activity against hepatitis A virus and herpes simplex virus type 1.