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Приказ резултата 11-20 од 31
Prediction of the reactive intermediates in alkane activation by tris(pyrazolyl borate)rhodium carbonyl
(Amer Chemical Soc, Washington, 1998)
Two intermediates are observed in the time-resolved IR spectra of the photoinitiated alkane (RH) activation reaction of Tp*Rh(CO)(2) (Tp* = HB-(3,5-dimethylpyrazolyl). Density functional calculations suggest that the first ...
The preparation and characterization of facial and meridional isomers of uns-cis-(ethylenediamine-N,N '-di-3-propionato)cobalt(III) complexes with aliphatic alpha-S-amino acids
(Serbian Chemical Soc, Belgrade, 1998)
A series of several complex compounds, both facial and meridional, of uns-cis-(ethylenediamine-N,N'-di-3-propionato)cobalt(III) complexes with some alpha-S-amino acids, S-alanine, S-valine, S-leucine and S-isoleucine, were ...
Sequential free radical reactions with xanthates: Cyclopentane ring annulation
(Georg Thieme Verlag, Stuttgart, 1998)
In the presence of electron-rich alkenes, electro- and ambiphilic homoallylic radicals, generated by homolytic decomposition of the corresponding xanthates, undergo annulation with inverse electron-demand, and afford ...
Classification tools based on artificial neural networks for the purpose of identification of origin of organic matter and oil pollution in recent sediments
(Inst Lebensmitteltechnologie Analytische Chemie, Freising-Weihenstephan, 1998)
The distinction between autochthonous, and oil-like origin of organic matter in geological sediments can be performed on the basis of n-alkane abundance and distribution patterns, determined by gas chromatography, or on ...
Organic geochemical investigation of crude oils. The southeastern part of the Pannonian Basin in Yugoslavia
(Serbian Chemical Soc, Belgrade, 1998)
n-alkane distribution as a tool in the identification of organic type pollution in river sediments
(Inst Lebensmitteltechnologie Analytische Chemie, Freising-Weihenstephan, 1998)
An attempt was made to apply n-alkane distribution parameters in the identification of various organic matter pollution. Comparing the results of GC-analyses of n-alkanes in sewage-polluted river sediments with unpolluted ...
Regioselective synthesis and spectral characterization of ethyl (Z)- and (E)-2-alkylidene-4-oxothiazolidine-5-acetate derivatives. Solvent effects on the Z-E isomerization
(Pergamon-Elsevier Science Ltd, Oxford, 1998)
The title compounds containing an exocyclic double bond of exclusively the Z-configuration were prepared in anhydrous ethanol by the regioselective base catalyzed reaction of diethyl 2-mercaptobutanedioate with nitrile ...
Preparation, crystal structure and antibacterial activity of condensation products of usnic acid and acyl hydrazides
(Serbian Chemical Soc, Belgrade, 1998)
Three condensation products of usnic acid with the hydrazides of alpha-naphthoic, caprylic, and oxamic acids, respectively, have been prepared and characterized by spectrometric methods. A reassignment of the C-13-NMR ...
The synthesis, pharmacological evaluation and conformational analysis of (+/-)cis- and (+/-)trans3-carbomethoxy fentanyl-"iso-carfentanil"
(Serbian Chemical Soc, Belgrade, 1998)
A novel analogue of fentanyl, 3-carbomethoxyfentanyl, or "iso-carfentanil", was synthesized by a simple and efficient route. In the first step phenethylamine was condensed with two equivalents of methyl acrylate to afford ...
3-carbomethoxy fentanyl: Synthesis, pharmacology and conformational analysis
(Walter De Gruyter Gmbh, Berlin, 1998)
The synthesis of a novel analogue of fentanyl, 3-carbomethoxy fentanyl or "iso-carfentanil" has been accomplished in five steps, by simple and efficient route, starting from phenethyl amine and methyl acrylate. Both (+/-) ...