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1.
I. Goba B. Turovska J. Stradins I. Turovskis E. Liepinsh S. Belyakov 《Chemistry of Heterocyclic Compounds》2007,43(2):175-186
It has been shown that chemical oxidation of the methyl ester of 3,4,5-trimethoxycarbonyl-1,2,6-trimethyl-1,4-dihydropyridine
to the pyridinium salt, requiring forcing experimental conditions, may be replaced by electrochemical oxidation. On electrochemical
reduction of 3,4,5-trimethoxycarbonyl-1,2,6-trimethylpyridinium perchlorate in the presence of alkylating agents 1,2,3,4,4,5,6-substituted
1,4-dihydropyridines are obtained.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 226–237, February, 2007. 相似文献
2.
Stavitskaya S. S. Tomashevskaya A. N. Goba V. E. Kartel’ N. T. Strelko V. V. 《Russian Journal of Applied Chemistry》2004,77(9):1450-1454
The performance of various carbon materials in sorption capture of chlorine from waste gases yielded by electrolysis of nickel-manganese solutions was studied. A simple method was proposed for regeneration of carbons after sorption of chlorine, which makes them suitable for repeated use in sorption installations for chlorine capture.Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 9, 2004, pp. 1462–1466.Original Russian Text Copyright © 2004 by Stavitskaya, Tomashevskaya, Goba, Kartel, Strelko. 相似文献
3.
Stavitskaya S. S. Goba V. E. Kartel' N. T. 《Russian Journal of Applied Chemistry》2002,75(12):1960-1964
Antimicrobial preparations based on anthracite and carbon fabric and prepared by chlorination were studied as influenced by the moisture content of sorbent, its bulk weight, chlorination temperature, etc. 相似文献
4.
V. V. Strelko S. S. Stavitskaya N. N. Tsyba A. A. Lysenko S. V. Zhuravskii V. E. Goba 《Russian Journal of Applied Chemistry》2007,80(3):389-396
Simple methods were suggested and conditions were found under which modified carbon materials with varied chemical nature of the surface and controllable catalytic activity in the model reaction of hydrogen peroxide decomposition can be produced from various raw materials. The pore structure parameters of the carbons synthesized were determined, the kinetics of the reaction under study on these carbons was analyzed, and the possibility of synthesis of carbon catalysts with high catalytic activity exceeding that of the known active carbons was demonstrated. 相似文献
5.
B. Turovska I. Goba I. Turovskis S. Grinberga S. Belyakov S. Stupnikova E. Liepinsh J. Stradins 《Chemistry of Heterocyclic Compounds》2008,44(12):1483-1490
The electrochemical oxidation of 4-monoalkyl-substituted 1,4-dihydropyridines has been studied in an aprotic medium and in
the presence of pyridine. In an aprotic medium the products of oxidation are both 4-alkyl-substituted and 4-unsubstituted
pyridines or mixtures of them. On oxidation in acetonitrile of 4-Et-, 4-n-Pr-, and 4-i-Bu-substituted dihydropyridines, 2-methylene-1,2,3,4-tetrahydropyridines
were obtained in addition to the oxidized forms. In the presence of base the products of preparative electrolysis of the studied
compounds were 4-alkyl-substituted pyridines. The exception was the 4-i-Pr- substituted dihydropyridine which was dealkylated
on oxidation even in the presence of base.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1829–1838, December 2008. 相似文献
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S. S. Stavitskaya V. E. Goba A. N. Tomashevskaya N. N. Tsyba 《Russian Journal of Applied Chemistry》2005,78(8):1258-1265
Electron microscopy and adsorption-structural, X-ray phase, and thermal analyses were used to determine the density, porosity, microstructure, electrical conductivity, and reactivity of new carbon aerogels based on phenol-formaldehyde polymers. 相似文献
9.
S. S. Stavitskaya V. E. Goba A. N. Tomashevskaya N. T. Kartel' 《Russian Journal of Applied Chemistry》2005,78(10):1591-1595
New methods for synthesis of uniformly porous carbon materials with sieve properties and small apparent density from phenol-formaldehyde resins were developed; the optimal conditions of their synthesis were determined. New types of finely dispersed carbon powders were prepared using various treatment procedures at different stages; the structural and sorption properties of the resulting materials were studied. 相似文献
10.
In this article, we describe the characteristic 15N and 1HN NMR chemical shifts and 1J(15N–1H) coupling constants of various symmetrically and unsymmetrically substituted 1,4‐dihydropyridine derivatives. The NMR chemical shifts and coupling constants are discussed in terms of their relationship to structural features such as character and position of the substituent in heterocycle, N‐alkyl substitution, nitrogen lone pair delocalization within the conjugated system, and steric effects. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献