Monatshefte für Chemie - Chemical Monthly

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New palladium(II) complexes containing 3-mercapto-1,2,4-triazole ligands: synthesis, characterization, crystal structure, and density functional theory calculations

Ali Gouranourimi, Mitra Ghassemzadeh, Samira Bahemmat, Bernhard Neumüller, more

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 57-67

Two new palladium(II) complexes of 4-amino-3-methyl-1,2,4-triazol-5-thione (H₃L) have been synthesized and characterized. The reaction of H₃L, palladium(II) chloride, and sodium acetate in a molar ratio 2:1:2 gave the homoleptic binuclear palladium(II) complex [Pd₂(H₂L)₄]·2DMSO (1), while its treatment with palladium(II) chloride, sodium acetate, and triphenylphosphane in a molar ratio 4:4:7:4 gave...

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Synthesis, characterization, and antioxidant activity of pyrazolic macrocycle

Hehua Zeng, Yongming Zeng, Lili Geng, Xueqin Li, more

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 199-206

A series of macrocycles containing isoxazoline, dioxazole, and pyrazole were synthesized and characterized by IR, ¹H, and ¹³C NMR, mass spectra, elemental analysis, and X-ray single crystal determination. The antioxidant activity of synthesized compounds was evaluated. One of the compounds exhibits potent DPPH radical scavenging activity, comparable to that of vitamin E. Graphical abstract

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Synthesis, characterization, and pharmacological screening of new 1,3,4-oxadiazole derivatives possessing 3-fluoro-4-methoxyphenyl moiety

Dinesha, Shivapura Viveka, Sharath Chandra, Gundibasappa K. Nagaraja

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 207-214

Within the past years, many researches on the synthesis, structure–activity relationships (SAR), antimicrobial and antioxidant activities of the 1,3,4-oxadiazole derivatives have been reported. Several 1,3,4-oxadiazole derivatives possess important pharmacological activities and they have been proved useful materials in drug research. New series of 1,3,4-oxadiazole derivatives incorporating a 3-fluoro-4-methoxyphenyl...

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Synthesis, spectral, X-ray diffraction, antimicrobial studies, and DNA binding properties of binary and ternary complexes of pentadentate N₂O₃ carbohydrazone ligands

Magdy Shebl, Saied M. E. Khalil

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 15-33

Two pentadentate carbohydrazone ligands, H₂L¹ and H₂L², were prepared by the reaction of the bifunctional compound carbohydrazide with 2-hydroxy-5-nitrobenzaldehyde and 2-hydroxy-1-naphthaldehyde, respectively. Reactions of the ligands with oxovanadium(IV), cerium(III), thorium(IV), and dioxouranium(VI) ions yielded binary complexes. Reactions of the ligands with the dioxouranium(VI) ion in the presence...

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Synthesis of spirochromene derivatives catalyzed by Mn(bpyo)₂/MCM-41 in water

Mansoureh Daraie, Yahya S. Beheshtiha, Majid M. Heravi

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 191-198

A three-component one-pot synthesis of spirochromene derivatives by condensing cyclic 1,3-diketones, isatin or acenaphthenequinone, and malononitrile using a catalytic amount of Mn(bpyo)₂/MCM-41 in refluxing water is reported. Graphical Abstract

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EPR study of radical products generated from N-alkylbenzylamines by the action of some peroxo and lead(IV) agents

Lenka Šafaříková, Ladislav Omelka

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 79-87

To understand the behavior of secondary amines in the role of antioxidants, in more detail, the radical transformations of N-alkylbenzylamines in the presence of different agents were investigated using EPR spectroscopy. The aminoxyl radicals prepared by the reaction with 3-chloroperbenzoic acid undergo the transformations at alkyl substituent by the addition of t-BuO₂· radicals, secondary aminoxyls...

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Microwave-assisted preparation, structural characterization, lipophilicity, and anti-cancer assay of some hydroxycoumarin derivatives

Kinga Ostrowska, Elżbieta Hejchman, Dorota Maciejewska, Agata Włodarczyk, more

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 89-98

A new series of hydroxycoumarin derivatives has been synthesized using conventional synthesis. The syntheses were accelerated by microwave assistance. Yields in both cases were comparable (59–69 %). The structures were established by ¹H and ¹³C NMR spectroscopy and high-resolution mass spectrometry. Five compounds (5-hydroxy-4,7-dimethylcoumarin, 6-acetyl-5-hydroxy-4,7-dimethylcoumarin, 4-(cyanomethoxy)chromen-2-one,...

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One-pot synthesis of 1,4-disubstituted 1,2,3-triazoles via Huisgen 1,3-dipolar cycloaddition catalysed by SiO₂–Cu(I) oxide and single crystal X-ray analysis of 1-benzyl-4-phenyl-1H-1,2,3-triazole

Manjulla Gupta, Monika Gupta, Satya Paul, Rajni Kant, more

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 143-148

A one-pot synthesis of 1,4-disubstituted 1,2,3-triazoles via Huisgen 1,3-dipolar cycloaddition reaction between terminal alkynes, benzyl/allyl/alkyl halides, and NaN₃ in water at room temperature using silica-supported copper(I) oxide (SiO₂–Cu₂O) has been developed. Various supported copper(I) oxide catalysts have been tested for this reaction where silica-supported copper(I) oxide works well in this...

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3-Methyl-1-sulfoimidazolium ionic liquids as recyclable medium for efficient synthesis of quinoline derivatives by Friedländer annulation

Parishmita Sarma, Arup Kumar Dutta, Pinky Gogoi, Bipul Sarma, more

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 173-180

Two acidic ionic liquids, 3-methyl-1-sulfoimidazolium trichloroacetate ([Msim][OOCCCl₃]) and 3-methyl-1-sulfoimidazolium chloride ([Msim]Cl) were efficiently utilized as recyclable acidic homogeneous medium for the Friedländer synthesis of quinolines at 100 °C. The reaction completed with single product formation in short time and involved simple isolation of product with 95–100 % yields. The novel...

article

Synthesis, characterization, and optical properties of lead(II) coordination polymers and nanosize lead oxide core of polymer

Sara Karimi Behzad, Ezzatollah Najafi, Mostafa M. Amini, Azadeh Tadjarodi, more

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 35-45

Two new three-dimensional lead(II) coordination polymers, [Pb₂(4-bpdb)(NO₃)₄]_n and [[Pb(4-bpdb)(NO₃)(PhN₂O₂)]₂]_n, were prepared and characterized by ¹H and ¹³C NMR, IR, and UV spectroscopy and elemental analysis. In addition, the molecular structure of [(Pb(4-bpdb)(NO₃)(PhN₂O₂))₂]_n was determined by single-crystal X-ray diffraction. Photoluminescence properties of complexes showed that a good...

article

Zirconium dodecylphosphonate promoted synthesis of xanthene derivatives by condensation reaction of aldehydes and β-naphthol or dimedone in green media

Soheila Ghassamipour, Razieh Ghashghaei

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 159-163

A green and safe method for the synthesis of variety of xanthene derivatives by condensation reaction between aldehydes and β-naphthol or dimedone in an alcoholic solution is described. Cheap and environmentally benign reaction media, simple work-up, mild reaction conditions, recovery of catalyst, and excellent yields are the main advantages of this procedure. On the other hand, the acyclic producing...

article

Hydrothermal synthesis, structure, porosity, and luminescent properties of 3D coordination polymer of holmium with 1,4-phenylenediacetic acid [Ho₂(PDA)₃(H₂O)]_n·2nH₂O

Mohd Yawer, Swati Sharma, Mukaddus Kariem, Haq N. Sheikh, more

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 47-55

Coordination polymer formulated as [Ho₂(PDA)₃(H₂O)]_n·2nH₂O having three-dimensional network was hydrothermally synthesized (H₂PDA is 1,4-phenylenediacetic acid). The polymer crystallizes in the monoclinic space group P 2₁/c, unit cell parameters: a = 21.7025(2) Ǻ, b = 10.03560(10) Ǻ, c = 14.03430(10) Ǻ, β = 91.7110(10)° (Z = 4), and exhibits a three-dimensional porous framework. The polymer contains...

article

Electrochemical oxidation of catechol derivatives in the presence of 3-acetyldihydro-2(3H)-furanone: efficient and green method for synthesis of new butyrolactone derivatives

Mansour Arab Chamjangali, Mohamad Bakherad, Mohsen Ameri

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 111-117

Electro-oxidation of catechols has been studied in the presence of 3-acetyldihydro-2(3H)-furanone as a nucleophile in water–ethanol solution (90:10 v/v), using cyclic voltammetry and controlled-potential coulometry. The results indicate that the electro-generated o-benzoquinone participates in a Michael addition reaction with this nucleophile and via EC mechanism pathway, converted to corresponding...

article

Synthesis, characterization, and pharmacological evaluation of some novel thiadiazoles and thiazoles incorporating pyrazole moiety as anticancer agents

Sobhi M. Gomha, Taher A. Salah, Abdou O. Abdelhamid

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 149-158

Two series of novel 2-[[1-(5-methyl-1-phenyl-5-substituted-1H-pyrazol-4-yl)ethylidene]hydrazono]-3-phenyl-2,3-dihydro-1,3,4-thiadiazole derivatives and 2-[5-(4-chlorophenyl)-5′-methyl-1′-phenyl-3,4-dihydro-1′H,2H-[3,4′-bipyrazol]-2-yl]-4-substituted-5-(phenyldiazenyl)thiazole derivatives were prepared from reaction of hydrazonoyl halides with methyl 2-[1-(5-methyl-1-phenyl-1H-pyrazol-4-yl)ethylidene]hydrazine-carbodithioate...

article

Cocrystals of quercetin: synthesis, characterization, and screening of biological activity

Miroslav Veverka, Tibor Dubaj, Ján Gallovič, Vladimír Jorík, more

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 99-109

Cocrystallization of quercetin with 22 cocrystal formers, i.e. phenolic acids, proline, urea, N-acetylcytosine, carnitine, dacarbazine, diflunisal, kojic acid, lactamide, baclofen, pyrazole, edaravone, salicylamide, O-acetylsalicylamide, 2-imidazolidinone, allopurinol, dipyridamole, 5-sulfosalicylic acid, and 4-sulfobenzoic acid resulted in cocrystals with various stoichiometric ratios. The cocrystals...

article

A novel method of reduction of >C=N-group in hydrazones, phenylhydrazones, azines, and tosylhydrazones by Mg–methanol

Jitender M. Khurana, B. M. Kandpal, Purnima Sharma, Manav Gupta

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 187-190

A simple and convenient procedure is reported for the synthesis of mono- and 1,2-disubstituted hydrazines and tosylhydrazines by reduction of corresponding hydrazones, phenylhydrazones, azines, and tosylhydrazones by magnesium in methanol at ambient temperature. Graphical abstract

article

The hydrogen bond interactions in glycine–nitrosamine complexes: a DFT study

Batoul Makiabadi, Hamideh Kian

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 69-78

The strong and directional hydrogen bonding interaction between glycine (G) and nitrosamine (NA) have been investigated using B3LYP and B3PW91 methods with a wide range of basis sets. With four preferential interaction sites in the vicinity of the glycine, eight different conformations (GNA1-8) with two intermolecular hydrogen bonds [NH_NA···N(O)_G and O(N)_NA···HX_G (X = O, N, C)] were found on the potential...

article

FeCl₃–SiO₂ promoted one-pot, three-component synthesis of novel 1,5-benzodiazepine derivatives

Ying-Shuang An, Xiao-Qing Li, Xiao-Ran An, Lan-Zhi Wang

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 165-172

An efficient and simple synthesis of novel 4-methyl-2-(pyridin-2-yl)-2,5-dihydro-1,5-benzodiazepine-3-carboxylate derivatives by one-pot, three-component reaction of substituted 1,2-phenylenediamines, 2-pyridinecarboxaldehyde, and β-keto ester in the presence of a catalytic amount of silica-supported FeCl₃ (FeCl₃–SiO₂) is reported. The catalyst FeCl₃–SiO₂ was found highly active, robust, recovered,...

article

Gold(I)-catalyzed heterocyclization of β-alkynyl hydroxamic acids: synthesis of isoxazolidin-3-ones

Andreas P. Häring, Philipp Klahn, Martin Jübermann, Fabian Mohr, more

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 119-134

A practical and mild method for the 5-exo cyclization of N-substituted α-alkynyl hydroxamic acids into isoxazolidin-3-ones catalyzed by Au(PPh₃)SbF₆ was developed. Under optimized conditions, the cyclization shows a high Z-selectivity for the newly formed exocyclic double bond. Graphical Abstract

article

Influence of organic modifiers on RP-TLC determination of lipophilicity of some polydentate Schiff bases

Danica S. Perušković, Branka Darić, Anita Blagus, Nikola R. Stevanović, more

Monatshefte für Chemie - Chemical Monthly > 2015 > 146 > 1 > 1-6

The lipophilic character of polydentate Schiff bases was investigated by reversed-phase thin-layer chromatography. In order to determine retention parameter as a measure of the lipophilicity of the tested compounds, three different binary solvent systems, composed of water and organic modifier (methanol, acetonitrile, and tetrahydrofuran), were used. Lipophilicity parameters together with 2D molecular...

INFONA - science communication portal

Monatshefte für Chemie - Chemical Monthly

New palladium(II) complexes containing 3-mercapto-1,2,4-triazole ligands: synthesis, characterization, crystal structure, and density functional theory calculations

Synthesis, characterization, and antioxidant activity of pyrazolic macrocycle

Synthesis, characterization, and pharmacological screening of new 1,3,4-oxadiazole derivatives possessing 3-fluoro-4-methoxyphenyl moiety

Synthesis, spectral, X-ray diffraction, antimicrobial studies, and DNA binding properties of binary and ternary complexes of pentadentate N₂O₃ carbohydrazone ligands

Synthesis of spirochromene derivatives catalyzed by Mn(bpyo)₂/MCM-41 in water

EPR study of radical products generated from N-alkylbenzylamines by the action of some peroxo and lead(IV) agents

Microwave-assisted preparation, structural characterization, lipophilicity, and anti-cancer assay of some hydroxycoumarin derivatives

One-pot synthesis of 1,4-disubstituted 1,2,3-triazoles via Huisgen 1,3-dipolar cycloaddition catalysed by SiO₂–Cu(I) oxide and single crystal X-ray analysis of 1-benzyl-4-phenyl-1H-1,2,3-triazole

3-Methyl-1-sulfoimidazolium ionic liquids as recyclable medium for efficient synthesis of quinoline derivatives by Friedländer annulation

Synthesis, characterization, and optical properties of lead(II) coordination polymers and nanosize lead oxide core of polymer

Zirconium dodecylphosphonate promoted synthesis of xanthene derivatives by condensation reaction of aldehydes and β-naphthol or dimedone in green media

Hydrothermal synthesis, structure, porosity, and luminescent properties of 3D coordination polymer of holmium with 1,4-phenylenediacetic acid [Ho₂(PDA)₃(H₂O)]_n·2nH₂O

Electrochemical oxidation of catechol derivatives in the presence of 3-acetyldihydro-2(3H)-furanone: efficient and green method for synthesis of new butyrolactone derivatives

Synthesis, characterization, and pharmacological evaluation of some novel thiadiazoles and thiazoles incorporating pyrazole moiety as anticancer agents

Cocrystals of quercetin: synthesis, characterization, and screening of biological activity

A novel method of reduction of >C=N-group in hydrazones, phenylhydrazones, azines, and tosylhydrazones by Mg–methanol

The hydrogen bond interactions in glycine–nitrosamine complexes: a DFT study

FeCl₃–SiO₂ promoted one-pot, three-component synthesis of novel 1,5-benzodiazepine derivatives

Gold(I)-catalyzed heterocyclization of β-alkynyl hydroxamic acids: synthesis of isoxazolidin-3-ones

Influence of organic modifiers on RP-TLC determination of lipophilicity of some polydentate Schiff bases

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