2009 Volume 4, no.2
Author(s): Felix Shepel, Diana Shepel, Fliur Macaev
Field: Natural product chemistry and synthesis
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 116-117
Keywords: derivatives of 5-oxindole, cardio-vascular remedies.
Full Text (PDF): Download
DOI: dx.doi.org/10.19261/cjm.2009.04(2).01
Graphical Abstract: It has been conducted increase the yield up to 63% of ethyl 5-hydroxy-1,2-dimethyl-1
H-3-indolecarboxylate via interaction of
p-benzoquinone with N-methyl-
b-aminocrotone ether in mixture of glacial acetic acid/ethyl acetate.
Downloads: 10
Author(s): Ion Dranca, Tudor Lupascu
Field: Physical chemistry and chemical physics
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 105-115
Keywords: molecular mobility; excipients (sucrose & trehalose); α- and β-relaxations; activation energy; DSC & TM DSC.
Full Text (PDF): Download
DOI: dx.doi.org/10.19261/cjm.2009.04(2).02
Graphical Abstract: The paper explores the use of differential scanning calorimetry (DSC) and temperature modulated differential scanning calorimetry (TM DSC) to study α- and β- processes in amorphous sucrose and trehalose. The real part of the complex heat capacity is evaluated at the frequencies,
f, from 5 to 20mHz. β-relaxations were studied by annealing glassy samples at different temperatures and subsequently heating at different rates in a differential scanning calorimeter.
Downloads: 10
Author(s): Anca-Dana Bendrea, Ana-Maria Catargiu and Mircea Grigoras
Field: Supramolecular chemistry
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 100-104
Keywords: polymers composites, SBA-polithiophene, SBA-polyaniline.
Full Text (PDF): Download
Downloads: 19
Author(s): Jalil Moubarak, Elodie Moreno, Eric Diesis and Anthony W. Coleman
Field: Supramolecular chemistry
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 94-99
Keywords: Calix[n]arene, para-Sulphonato-calix[4]arene, Electrospray Mass Spectrometry, Binding Constants, Complex Stoichiometry, Sequential Binding.
Full Text (PDF): Download
DOI: dx.doi.org/10.19261/cjm.2009.04(2).04
Graphical Abstract: The binding of
para-Sulphonato-calix[4]arene to a series of Serum Albumin Proteins has been studied using Electrospray Mass Spectrometry, each protein shows different capacities to interact with
para-Sulphonato-calix[4]arene, including the number of ligands bound, the Association Constants observed, and the stoichiometries at which the onset of each binding event is observed.
Downloads: 9
Author(s): Oleksandr Shkurenko, Kinga Suwinska, Florent Perret, Katia Sigaud, Antoine Leydier, Said Jebors and Anthony W. Coleman
Field: Supramolecular chemistry
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 86-93
Keywords: Calix[n]arenes, X-ray Crystallography, Structure, Mono-anionic, Diamino-Bicycloundecane, inclusion polymer.
Full Text (PDF): Download
DOI: dx.doi.org/10.19261/cjm.2009.04(2).05
Graphical Abstract: Diamino-bicycloundecane mono-deprotonates H-calix[4]arene and the solid-structure of the resulting salt has been determined by X-ray crystallography. Two different complexes are present in the structure with the Diamino-bicycloundecane cation held in the calix[4]arene cavity by CH-p interactions. In the packing there is a hydrogen-bonded polymeric chain. Both the complexes formed layered structures with differing inter-layer distances.
Downloads: 8
Author(s): Rodica Dinica, Bianca Furdui, Geta Cârâc and Constantin Stanciu
Field: Organic chemistry
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 82-85
Keywords: microwave, “one-pot” reaction, indolizine.
Full Text (PDF): Download
DOI: dx.doi.org/10.19261/cjm.2009.04(2).06
Graphical Abstract: Substituted indolizines are very attractive heterocyclic units. On developing efficient methods toward differently substituted indolizines, we were particularly interested in elaborating efficient approaches toward three-component reaction of these compounds which are very interested from the point of view fluorescent properties. The microwave-mediated three component reaction of acyl bromide, bipyridine and dipolarophyl is catalyzed by basic alumina to give corresponding bis-indolizines in excellent yields in a one –pot reaction.
Downloads: 18
Author(s): Oleg Radul, Alexandru Gudima, Fliur Macaev
Field: Natural product chemistry and synthesis
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 78-81
Keywords: chinchoninic acids, quinoline, pinonic acid, α-pinene.
Full Text (PDF): Download
DOI: dx.doi.org/10.19261/cjm.2009.04(2).07
Graphical Abstract: New effective synthesis of the chiral chinchoninic acids form (-)-α-pinene has been elaborated. It has been shown that, the considerable increase of the yield and purity of chiral acids is achieved applying the method of under phase transfer catalysis. New effective synthesis
of the chiral chinchoninic acids form (-)-α-pinene has been elaborated
. It has been shown that, the considerable increase of the yield and purity of chiral acids is achieved applying the method of under phase transfer catalysis.
Downloads: 17
Author(s): Stepan Shvets, Irina Nedova, Pavel Kintia, Carla Bassarelo, Cosimo Pizza and Sonia Piacente
Field: Natural product chemistry and synthesis
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 72-77
Keywords: steroidal glycoside, NMR analysis, Solanum melongena L.
Full Text (PDF): Download
DOI: dx.doi.org/10.19261/cjm.2009.04(2).08
Graphical Abstract: One new cholestane glycoside, six steroidal glycosides of spirostane series and one pregnane glycoside have been isolated from the roots of
Solanum melongena L. for the first time. Their structures were determined by physico-chemical methods.
Downloads: 22
Author(s): S.B. Strashnova, O.V. Avramenko, M.N. Zhuk, O.V.Kovalchukova, P.V. Strashnov, B.E. Zaitsev
Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 68-71
Keywords: 3d metals; complexes; nitrofluoreniliden-9-anilin; amino-group.
Full Text (PDF): Download
DOI: dx.doi.org/10.19261/cjm.2009.04(2).09
Graphical Abstract: The complexes of general formula MCl
2∙L
1-4∙
nH
2O (where L
1 -
N-(2,4,7-trinitrofluorenilidene-9)-
p-dimethyl-aminoanilin, L
2 -
N-(2,4,5,7-tetranitrofluorenilidene-9)-
p-dimethylaminoaniline, L
3 -
N-(2,4,7-trinitrofluorenilidene)-N-(
p-dimethylaminophenyl)hydroxylamine, L
4 -
N-(2,4,5,7-tetranitrofluorenilidene-9)-
N-(
p-dimethylaminophenyl)-hydroxylamine; M=Cu, Co, Ni, Zn;
n= 1-3 have been synthesized and investigated by different methods. Spectral criteria of co-ordination of the molecules L
1 –L
4 in electronic adsorption spectra were detected.
Downloads: 21
Author(s): Silvia Melnic, Denis Prodius, Sergiu Shova, Helen Stoeckli-Evans, Yurii Simonov, Alexandr Feher, Maria Gdaniec, Constantin Turta
Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 60-67
Keywords: heteronuclear lanthanide (III) complexes, furancarboxylates ligand, crystal structure, magnetic properties.
Full Text (PDF): Download
DOI: dx.doi.org/10.19261/cjm.2009.04(2).10
Graphical Abstract: Nine new complexes with the general formula {[Ln2Ba(α-Fur)8(H2O)4]}n, where Ln = Nd3+, Sm3+, Eu3+, Pr3+, Gd3+, Tb3+, Ho3+, Er3+ and La3+; α-Fur ≡ C4H3OCOO, were synthesized and characterized by IR spectra, magnetism, X-ray single crystal and powder diffractions.
Downloads: 22