نتایج جستجو برای: 4 arylmethylenebis1h pyrazol 5 ols
تعداد نتایج: 2068383 فیلتر نتایج به سال:
3-((2E)-3(aryl)prop-2-enoyl)-2H-chromen-2-one 3 was synthesized from 4-hydroxy coumarin by refluxing 3-acetyl-4-hydroxy coumarin with aromatic aldehydes in chloroform in the presence of a catalytic amount of piperidine. 3 was converted to pyrazoles 4, 5 by treatment with hydrazine and phenylhydrazine in toluene, respectively. The structures of the new compounds were confirmed by elemental analy...
Objectives. The paper is devoted to the crystal structure characterization of 5-methyl-2-phenyl4H-pyrazol-3-one (compound I) and 2-(4-chlorophenyl)-5-methyl-4H-pyrazol-3-one II). Methods . Single-crystal X-ray diffraction studies theoretical calculations: Density functional theory quantum atoms in molecules. Results In solid state, compound I characterized by alternation OH NH tautomers connect...
(pyrazol-3-yl)pyridmium group at the C-3' position as a combination of the pyridine moiety of ceftazidime2) and the pyrazole moiety of cefoselis3) to attain a synergic effect in activity. As we expected, those compoundsexhibited wellbalanced and broad spectrum of activity against Grampositive and Gram-negative bacteria. Of them, 7-[(Z)-2-(2aminol ,3-thiazol-4-yl)-2-(methoxyimino)acetamido]-3[(3...
Reactions of [(η(6)-cymene)Ru(μ-Cl)Cl]2 with acylpyrazolone ligands HQ' (HQ' in general; in detail, HQ(CH2Cl) = 2-chloro-1-(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)ethanone), HQ(hex) = 1-(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)heptan-1-one), HQ(nPe) = 1-(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)-3,3-dimethylbutan-1-one)), in the presence of base, gave the corresponding [(η(6)-cymene...
A series of novel N-(3-substituted aryl/alkyl-4-oxo-1,3-thiazolidin-2-ylidene)-4-[5-(4-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamides 2a-e were synthesized by the addition of ethyl a-bromoacetate and anhydrous sodium acetate in dry ethanol to N-(substituted aryl/alkylcarbamothioyl)-4-[5-(4-methylphenyl)-3-(trifluoro-methyl)-1H-pyrazol-1-yl]benzene sulfonamides 1a-e, which...
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