Samil Isik

Synthesis, Anticonvulsant and Antimicrobial Activities of Some New [1-(2-Naphthyl)-2-(pyrazol-1-yl)ethanone]oxime Ethers

In this study, 12 new oxime ether derivatives, which were expected to show anticonvulsant and antimicrobial activities, were synthesized. Oxime ether derivatives were synthesized by the reaction of various alkyl halides with 1-(2- naphthyl)-2-(pyrazol-1-yl)ethanone oxime. Anticonvulsant activity of the compounds was determined by maximal electroshock (MES) and subcutaneous metrazol (ScM) seizure tests, while neurological disorders were evaluated using rotorod toxicity test according to the ASP of NIH. Compound 1, 6 and 7 showed anticonvulsant activity at 300 mg/kg dose at 4 h, but compounds 1 and 7 showed toxicity at 300 mg/kg dose at half an hour. Antimicrobial activities of the compounds were also determined using agar microdilution method. Compound 1 and 5 were found to have the highest antifungal activity among the other compounds.

6-(2-Fluorobenzylidene)-2-[1-(2-fluoro-4-biphenyl)ethyl]thiazolo[3,2-b][1,2,4]triazol-5(6H)-one

The title compound, C(25)H(17)F(2)N(3)OS, was synthesized from 6-(benzylidene)thiazolo[3,2-b][1,2,4]triazol-5(6H)-one. The fused thiazolo[3,2-b][1,2,4]triazole system is essentially planar, and bifurcated C-H.O, C-H.N and C-H.F interactions are present between molecules.

Synthesis and Structural and Biochemical Activity Studies of Dioxime Ligand and its Mononuclear Cu(II), Ni(II), and Co(II) Complexes

A new tetradentate ligand incorporating dioxime moities has been synthesized. Its copper(II), nickel(II), and cobalt(II) complexes have been prepared and characterized by spectral methods. Elemental analyses and spectroscopic data of the metal complexes are consistent with the formation of the mononuclear copper(II), nickel(II) and cobalt(II) complexes. The crystal structure of the (2E, 2′E)-butane-2,3-dione 2,2′-{O 2,O 2′-[1,2-phenylenebis(methylene)]oxime compound (3) was determined by single-crystal x-ray diffraction technique. The free ligand and copper(II), nickel(II), and cobalt(II) complexes (5–7) were tested against the morphology of series bacteria. The Cu(II), Ni(II), and Co(II) complexes exhibit higher activity than dioxime ligand under identical experimental conditions.

Two N-substituted 3,5-diphenyl-2-pyrazoline-1-thiocarboxamides

The structures of N-ethyl-3-(4-fluorophenyl)-5-(4-methoxyphenyl)-2-pyrazoline-1-thiocarboxamide, C19H20FN3OS, (I), and 3-(4-fluorophenyl)-N-methyl-5-(4-methylphenyl)-2-pyrazoline-1-thiocarboxamide, C18H18FN3S, (II), have similar geometric parameters. The methoxy/methyl-substituted phenyl groups are almost perpendicular to the pyrazoline (pyraz) ring [interplanar angles of 89.29 (8) and 80.39 (10) degrees for (I) and (II), respectively], which is coplanar with the fluorophenyl ring [interplanar angles of 5.72 (9) and 10.48 (10) degrees]. The pyrazoline ring approximates an envelope conformation in both structures, with the two-coordinate N atom involved in an intramolecular N-H...N(pyraz) interaction. In (I), N-H...O and C-H...S intermolecular hydrogen bonds are the primary interactions, whereas in (II), there are no intermolecular hydrogen bonds.

The Crystal and Molecular Structure of 2-((3,4-dimethoxybenzylidene)amino)adamantane

The crystal structure of the title compound, C 19 H 25 NO 2 was determined by single crystal X-ray diffraction technique. The crystal data are Orthorombic, space group Pbca, with a = 9.2119(4), b = 9.5555(4), c = 37.6049(5) A, Z = 8, T = 293(2) K, MoKa radiation, λ = 0.71073 A, M r = 299.40, R = 0.0839 for 1945 reflections with I>2σ(I). The title compound shows intermolecular C-H...O type interactions.

Synthesis of (2E,3E,10E,12E)-3,11-dimethyl-5,9-dioxa-4,10-diazatrideca-3,10-diene-2,12-dione dioxime and its Cu(II), Ni(II), and Co(II) complexes

A new tetradentate ligand incorporating dioximes has been synthesized. The dioxime, (H2L) was characterized by elemental analysis, 1H-NMR, 13C-NMR, IR, and mass spectral data. In addition, its copper(II), nickel(II), and cobalt(II) complexes have been prepared and characterized by physical and spectral methods. Elemental analyses and spectroscopic data of the metal complexes are consistent with the proposed structures. The crystal structure of the Co(II) complex (7) was determined by single-crystal X-ray diffraction technique. The inhibitory activities of compounds were examined. Biological activities of the ligand and its metal complexes were tested and the ligand and its metal complexes had inhibitory activity against G(–) Staphylococcus aureus and Pseudomonas aeruginosa.

Synthesis, characterization and anti-inflammatory activity of new 5-(3,4-dichlorophenyl)-2-(aroylmethyl) thio-1,3,4-oxadiaxoles.

Several 5-(3,4-dichlorophenyl)-2-(aroylmethyl)thio-1,3,4-oxadiazoles were synthesized and characterized by elemental analyses, IR and nuclear magnetic resonance spectra. All compounds were evaluated for anti-inflammatory activity by determining their ability to provide protection against carregeenan-induced edema in rat paw. In addition, ulcerogenic activity was determined. The anti-inflammatory data scoring showed that compounds 5e, 5f and 5g, at the dose of 100 mg/kg, exhibited anti-inflammatory activity, which for compound 5f was comparable to that of the reference drug indometacin (CAS 53-86-1).