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- 1 (11)
- 2 (9)
- Antimicrobial activity (8)
- 3 (5)
- 4-triazole (4)
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- 4-oxadiazole (3)
- Mannich base (3)
- Michael addition (3)
- N-isocyaniminotriphenylphosphorane (3)
- Synthesis (3)
- 2-oxo-2-phenylacetaldehyde (2)
- 4-thiadiazole (2)
- Amines (2)
- Aromatic carboxylic acid (2)
- Cadmium (2)
- Cyclic voltammetry (2)
- Indole (2)
- Isocyanide (2)
- Nanoparticles (2)
- Preconcentration (2)
- Secondary amine (2)
- Silica nanoparticles (2)
- Tropolone (2)
- 1'-(Naphthalene-1 (1)
- 1-(2-pyridylazo)-2-naphthol (1)
- 1-hexyl-3-methylimidazolium hexafluorophosphate (1)
- 2'-bipyridine (1)
- 2(3H)-benzoxazolone (1)
- 2-(2-styrylcyclopent-3-enyl)benzo-[d]thiazole (1)
- 2-(2-thiazolylazo)-p-cresol (1)
Articles 61 - 75 of 75
Full-Text Articles in Physical Sciences and Mathematics
Synthesis And Antimicrobial Activity Of Some Novel 4-Hydroxyquinolin-2(1h)-Ones And Pyrano[3,2-C] Quinolinones From 3-(1-Ethy1-4-Hydroxy-2-Oxo-1,2-Dihydroquinolin-3-Yl)-3-Oxopropanoic Acid, Hany Mohamed Hassanin, Magdy Ahmed Ibrahim, Youssef Abdel-Salam Alnamer
Synthesis And Antimicrobial Activity Of Some Novel 4-Hydroxyquinolin-2(1h)-Ones And Pyrano[3,2-C] Quinolinones From 3-(1-Ethy1-4-Hydroxy-2-Oxo-1,2-Dihydroquinolin-3-Yl)-3-Oxopropanoic Acid, Hany Mohamed Hassanin, Magdy Ahmed Ibrahim, Youssef Abdel-Salam Alnamer
Turkish Journal of Chemistry
Chlorination, bromination, and condensation reactions of 3-(1-ethy1-4-hydroxy-2-oxo-1,2-dihydroquinolin-3-yl)-3-oxopropanoic acid (3) were studied. Some novel 4-hydroxyquinolin-2(1H)-ones and pyrano[3,2-c]quinolin-2(1H)-ones were also prepared. The structures of the novel compounds were established by elemental analyses and spectral data. All the products were also screened in vitro for their antimicrobial activity.
Preparation Of Porphyrinated Polyacrylonitrile Fiber Mat Supported Tio_2 Photocatalyst And Its Photocatalytic Activities, Linjun Shao, Ji Chen, Luyao He, Guiying Xing, Weixi Lv, Zaina Chen, Chenze Qi
Preparation Of Porphyrinated Polyacrylonitrile Fiber Mat Supported Tio_2 Photocatalyst And Its Photocatalytic Activities, Linjun Shao, Ji Chen, Luyao He, Guiying Xing, Weixi Lv, Zaina Chen, Chenze Qi
Turkish Journal of Chemistry
Fe(III)meso-tetraphenylporphyrinated polyacrylonitrile fiber mat supported TiO_2 photocatalyst (PANC/ TiO_2 mat) was prepared via copolymerization and electrospinning. SEM images showed that well-defined fibers with diameters around 1.47 \pm 0.26 \mu m were fabricated from Fe(III)meso-tetraphenylporphyrin (FeTPP)-acrylonitrile copolymer (PANC) and TiO_2 mixture. The XRD characterizations demonstrated that the electrospinning process had no effect on the anatase structure of TiO_2. The photocatalytic activity of the PANC/TiO_2 mat was examined for the photodegradation of methyl red in aqueous solution under the irradiation of visible light. The results showed that this PANC/TiO_2 fiber mat was very efficient for the photodegradation of methyl red, with a …
Preparation, Morphology, And Thermal And Optical Properties Of Thin Films Of Ferric Chloride/Polyethylene Oxide Composites, Sabiha Sultana, Muhammad Saleem Khan, Muhammad Humayun
Preparation, Morphology, And Thermal And Optical Properties Of Thin Films Of Ferric Chloride/Polyethylene Oxide Composites, Sabiha Sultana, Muhammad Saleem Khan, Muhammad Humayun
Turkish Journal of Chemistry
Pure poly (ethylene oxide) (PEO) films and PEO-FeCl_3 films of various concentration were prepared and studied for thermal and optical properties. Various analytical techniques like XRD, EDX, SEM, TGA, and UV were used to examine the structural properties of PEO and PEO-FeCl_3 systems. X-ray scans (XRD) revealed the existence of some crystalline part in the PEO matrix. The concentration of FeCl_3 has a great effect on the crystallinity of PEO. Thermogravimetric analysis (TGA) data established that accumulation of FeCl_3 to PEO films enhanced the thermal stability of PEO. The optical properties of these systems were also studied in the UV-Visible …
Synthesis Of Antipyrine/Pyridazinone Hybrids And Investigation Of Their In Vivo Analgesic And Anti-Inflammatory Activities, Sultan Baytaş, Nazan İnceler, Khatereh Fattahpour Mavaneh, Meci̇t Orhan Uludağ, Nuretti̇n Abacioğlu, Mehtap Gökçe
Synthesis Of Antipyrine/Pyridazinone Hybrids And Investigation Of Their In Vivo Analgesic And Anti-Inflammatory Activities, Sultan Baytaş, Nazan İnceler, Khatereh Fattahpour Mavaneh, Meci̇t Orhan Uludağ, Nuretti̇n Abacioğlu, Mehtap Gökçe
Turkish Journal of Chemistry
Eleven antipyrine/pyridazinone hybrids were synthesized and evaluated for their in vivo analgesic and anti-inflammatory activities by p-benzoquinone-induced writhing test and carrageenan-induced paw edema model, respectively. The test results indicated that compounds 6a, 6c, and 6d were equally or more potent analgesic and anti-inflammatory agents than aspirin and indomethacin, respectively. Side effects of the compounds were examined on gastric mucosa. Most of the compounds were found to be non-ulcerogenic under test conditions.
Substituent Effects On The Regioselectivity Of Maleamic Acid Formation And Hydrogen Chloride Addition To N-Aryl Maleimides, Yeli̇z Faturaci, Necdet Coşkun
Substituent Effects On The Regioselectivity Of Maleamic Acid Formation And Hydrogen Chloride Addition To N-Aryl Maleimides, Yeli̇z Faturaci, Necdet Coşkun
Turkish Journal of Chemistry
Itaconic anhydride reacts with aryl amines to give a substituent controlled equilibrium mixture of regioisomeric (Z)-2-methyl- and (Z)-3-methyl-4-oxo-4-(arylamino)but-2-enoic acids. Electron-donating groups favor nucleophilic attack on C-5 carbonyl, while the presence of electron-withdrawing groups enhances the bias for attack on C-2 carbonyl. The treatment of (Z)-2-methyl- and (Z)-3-methyl-4-oxo-4-(arylamino)but-2-enoic acids with SOCl_2-Et_3N in THF provided the corresponding maleimides in high yields while under the same conditions the maleic anhydride aryl amine addition products gave predominately the corresponding 3-chloro-1-arylpyrrolidine-2,5-diones and maleimides in substituent dependent ratio.
Synthesis And Structural X-Ray Analysis Of 1,1'-(Naphthalene-1,8-Diyl)-3,3'-Dibenzoyl-Bisthiourea And Its Use As Anion-Binding Receptor, Fatma Aydin, Nazan Tunoğlu, Doğan Aykaç, Nahi̇de Burcu Arslan, Canan Kazak
Synthesis And Structural X-Ray Analysis Of 1,1'-(Naphthalene-1,8-Diyl)-3,3'-Dibenzoyl-Bisthiourea And Its Use As Anion-Binding Receptor, Fatma Aydin, Nazan Tunoğlu, Doğan Aykaç, Nahi̇de Burcu Arslan, Canan Kazak
Turkish Journal of Chemistry
A novel artificial receptor, 1,1'-(naphthalene-1,8-diyl)-3,3'- dibenzoyl-bisthiourea, based on a 1,8-naphthalene skeleton bearing bisthiourea groups was prepared and characterized by IR and ^1H-NMR, ^{13}C-NMR, and MS spectroscopic techniques. The compound proved to be an efficient and selective naked-eye detector for the fluoride, cyanide, and hydroxide ions in DMSO. The crystal structure of the title compound was examined by using X-ray crystallographic techniques and found to be crystallized in the monoclinic space group P -1 with the unit cell parameters: a = 8.1556(8) Å, b = 12.0127(11) Å, c = 13.2081(11) Å, \alpha = 109.510(7)°, \beta = 95.390(7)°, \gamma = 103.660(7)°, Z …
Preparation Of 2-(N,N-Dialkylamino)-2,4,6- Cycloheptatrien-1-One Derivatives From An Isocyanide, A Primary Amine, Propionaldehyde, And Tropolone Via Ugi-Smiles Coupling Reaction In The Presence Of Silica Nanoparticles, Abdolhossain Massoudi, Issa Amini, Ali Ramazani, Fatemeh Zeinali Nasrabadi
Preparation Of 2-(N,N-Dialkylamino)-2,4,6- Cycloheptatrien-1-One Derivatives From An Isocyanide, A Primary Amine, Propionaldehyde, And Tropolone Via Ugi-Smiles Coupling Reaction In The Presence Of Silica Nanoparticles, Abdolhossain Massoudi, Issa Amini, Ali Ramazani, Fatemeh Zeinali Nasrabadi
Turkish Journal of Chemistry
The use of Smiles rearrangement in Ugi-type couplings with tropolone allows very straightforward multicomponent formation of 2-(N,N-dialkylamino)-2,4,6-cycloheptatrien-1-one derivatives. The 4-component reaction of isocyanides, tropolone (2-hydroxy-2,4,6- cycloheptatrien-1-one), primary amines, and propionaldehyde in the presence of silica nanoparticles (silica NPs, ca. 42 nm) proceeds easily in methanol to form the title compounds in a new Ugi--Smiles-type reaction.
Bifunctionalized Linked Bis-Spiro[Furo[2,3-D]Pyrimidine-6,5'- Pyrimidine]2,2',4,4',6'(3h,3'H,5h)-Pentaones Derived From One-Pot Reaction Of (Thio)Barbituric Acids With Aromatic Dialdehydes And Brcn In The Presence Of Et_3n, Nader Noroozi Pesyan, Mohammad Jalilzadeh
Bifunctionalized Linked Bis-Spiro[Furo[2,3-D]Pyrimidine-6,5'- Pyrimidine]2,2',4,4',6'(3h,3'H,5h)-Pentaones Derived From One-Pot Reaction Of (Thio)Barbituric Acids With Aromatic Dialdehydes And Brcn In The Presence Of Et_3n, Nader Noroozi Pesyan, Mohammad Jalilzadeh
Turkish Journal of Chemistry
Reaction of pyrimidine-(1H,3H,5H)-2,4,6-trione (barbituric acid), 1,3-dimethyl pyrimidine-(1H,3H,5H)-2,4,6-trione (1,3-dimethyl barbituric acid), and 1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)- dione (1,3-diethyl thiobarbituric acid) with cyanogen bromide and aromatic dialdehydes in the presence of triethylamine leads to the selective and efficient formation of a novel class of bifunctionalized stable heterocyclic bis-spiro[furo[2,3-d]pyrimidine-6,5'-pyrimidine] 2,2',4,4',6'(3H,3'H,5H)pentaones and their sulfur analogues, which are dimeric forms of barbiturate linked by a phenyl ring. A proposed mechanism was suggested for the formation of the products. The reaction of phthalaldehyde with BrCN and (thio)barbituric acids resulted in only monofunctionalized spiro[furo[2,3-d]pyrimidine-6,5'- pyrimidine]2,2',4,4',6'(3H,3'H,5H)pentaones, while isophthalaldehyde and terphthalaldehyde resulted in the bifunctionalized form.
Synthetic Access To Benzazolyl (Pyrazoles, Thiazoles, Or Triazoles), Bakr Fathy Abdelwahab, Hanan Ahmed Mohamed
Synthetic Access To Benzazolyl (Pyrazoles, Thiazoles, Or Triazoles), Bakr Fathy Abdelwahab, Hanan Ahmed Mohamed
Turkish Journal of Chemistry
This review surveys data published in recent years on the synthesis of benzazoles linked directly with pyrazoles, thiazoles, or triazoles. Some of the commercial applications are mentioned.
Synthesis, Structural Characterization, And Benzyl Alcohol Oxidation Activity Of Mononuclear Manganese(Ii) Complex With 2,2'-Bipyridine: [Mn(Bipy)_2(Clo_4)_2], İbrahi̇m Kani̇, Mehmet Kurtça
Synthesis, Structural Characterization, And Benzyl Alcohol Oxidation Activity Of Mononuclear Manganese(Ii) Complex With 2,2'-Bipyridine: [Mn(Bipy)_2(Clo_4)_2], İbrahi̇m Kani̇, Mehmet Kurtça
Turkish Journal of Chemistry
A manganese(II) complex of 2,2'-bipyridine (bipy) was synthesized and characterized by X-ray diffraction, IR, and UV-vis spectroscopy. The activity of the complex was tested for oxidation of benzyl alcohols using t-BuOOH as an oxidant in organic solvents and in an organic/water biphasic system (hexane/H_2O, toluene/H_2O). The effect of solvent, temperature, oxidant, and some additives (KBr, N(C_4H_9)Br, and N-bromosuccinimide) on the oxidation of benzyl alcohol is reported. The results show that benzyl alcohol was selectively converted to benzaldehyde in 71.9% yield within 4 h in acetonitrile. Control experiments performed without catalyst and the corresponding metal salt as catalyst produced no benzaldehyde …
Properties Of The Mixed Adsorption Layer: Neutral Detergent-Tetramethylthiourea At Interface Electrode/Solution, Jolanta Nieszporek, Dorota Sienko, Dorota Gugala-Fekner, Malgorzata Klin
Properties Of The Mixed Adsorption Layer: Neutral Detergent-Tetramethylthiourea At Interface Electrode/Solution, Jolanta Nieszporek, Dorota Sienko, Dorota Gugala-Fekner, Malgorzata Klin
Turkish Journal of Chemistry
The mixed adsorption layers of tetramethylthiourea and a neutral detergent formed at the electrode surface in 1 M NaClO_4 are described in this paper. The systems were characterized by the measurement of differential capacity, zero charge potential, and surface tension at the same potential. The data were analyzed to obtain the surface pressure and relative surface excess of tetramethylthiourea as a function of electrode charge and bulk concentration of the studied compounds. The values of the lateral interaction parameters, obtained in the presence and in the absence of decanoyl-N-methylglucamide (C_{17}H_{35}NO_6), change differently depending on the isotherm used, but \Delta G° …
Efficient One-Pot Alkylation Of Imines Using Nanosilver Iodide In Aqueous Media, Javad Safaei Ghomi, Ahmad Kakavand-Qalenoei, Mohammad Ali Ghasemzadeh, Masoud Salavati-Niasari
Efficient One-Pot Alkylation Of Imines Using Nanosilver Iodide In Aqueous Media, Javad Safaei Ghomi, Ahmad Kakavand-Qalenoei, Mohammad Ali Ghasemzadeh, Masoud Salavati-Niasari
Turkish Journal of Chemistry
An efficient ecofriendly method for the alkylation reaction of various imines is described by a simple one-pot reaction of aldehydes, amines and alkyl iodides in the presence of AgI nanoparticles in aqueous media. Silver iodide nanoparticles mediated an enhanced rate and facility of reaction and showed high influence in the green synthesis of some amine derivatives. Moreover, this nanoparticle increased the yields of products and decreased the reaction times in all cases. The heterogeneous mediator was fully characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and FT-IR experimental techniques.
Synthesis Of 3-Pyrroline-2-Ones From Amino Acids And An Aryl Amine, Nezi̇re Saygili, Cemi̇l Aydoğan
Synthesis Of 3-Pyrroline-2-Ones From Amino Acids And An Aryl Amine, Nezi̇re Saygili, Cemi̇l Aydoğan
Turkish Journal of Chemistry
The conversion of the amino group of amino dicarboxylicacid esters and an aryl amine into N-substituted pyrrolinone derivatives with dimethoxydihydrofurane is described. The conversion also occurs with serine methylester but it decomposes very quickly.
A Novel Soluble Phthalocyanine Capable Of Binding Four Boronic Esters, Şennur Özçeli̇k, Gülnur Keser Karaoğlan, Gülşah Gümrükçü, Ahmet Gül
A Novel Soluble Phthalocyanine Capable Of Binding Four Boronic Esters, Şennur Özçeli̇k, Gülnur Keser Karaoğlan, Gülşah Gümrükçü, Ahmet Gül
Turkish Journal of Chemistry
A novel Zn phthalocyanine bearing 4 salicylideniminophenyloxy substituents on peripheral positions was synthesized from the reaction of 4-aminophenoxy substituted phthalocyanine and salicylaldehyde. The condensation reaction of salicylidene Schiff base groups and benzeneboronic acid produced a new phthalocyanine carrying benzeneboronic acid ester derivatives as substituents. Ethoxy groups were bound to boronic acid as a second ligand. The presence of B-N bond interactions enhanced the stability of this boronated phthalocyanine derivative, which exhibited sufficient air stability during the purification and characterization processes. The novel compounds were characterized by using elemental analysis, IR, ^1H-NMR, ^{11}B-NMR, ^{13}C-NMR, UV-Vis and MALDI-TOF MS spectral data.
Evaluation Of A Wide Rim Phosphorylated Calix[4]Arene's Properties As A Sensory Molecule In An Er(Iii)-Pvc Membrane Sensor, Abbas Ali Zamani, Massoumeh Parinejad, Fataneh Jamali, Mohammad Reza Yaftian, Dominique Matt
Evaluation Of A Wide Rim Phosphorylated Calix[4]Arene's Properties As A Sensory Molecule In An Er(Iii)-Pvc Membrane Sensor, Abbas Ali Zamani, Massoumeh Parinejad, Fataneh Jamali, Mohammad Reza Yaftian, Dominique Matt
Turkish Journal of Chemistry
This study concerns the evaluation of ionophoric properties of a functionalized calix[4]arene, named 5,17-bis(diphenylphosphinoyl)- 25,26,27,28-tetrapropoxycalix[4]arene (Calix), by its application as a sensing material in an erbium(III)-PVC membrane potentiometric sensor. A membrane formed by 30% PVC, 65% dioctyl phthalate (DOP) as plasticizing solvent mediator, 2% sodium tetraphenyl borate (NaTPB) as ion excluder, and 3% of Calix as ionophore shows the best performance of the sensor. The prepared sensor presents a nearly Nernstian response (a slope of 20.0 \pm 0.5 mV/decade) over a concentration range of 1 \times 10^{-7}--1 \times 10^{-3} M of erbium ions, with a limit of detection of 3.8 …