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1.

Вид документа : Статья из журнала
Шифр издания : 54/T 82
Автор(ы) : Kozhevnikov D. N., Kataeva N. N., Rusinov V. L., Chupakhin O. N., Aleksandrov G. G.
Заглавие : Transformations of 1,2,4-triazine 4-oxides to pyridazines and triazolo[4,3-b]pyridazines by the action of substituted acetonitriles [Electronic resource]
Место публикации : Mendeleev Communications. - 2005. - Vol. 15, № 1. - С. 31-33
Систем. требования: http://www.sciencedirect.com/science/article/pii/S0959943605701711
Примечания : 11.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Two types of ring transformations of 1,2,4-triazine to pyridazine were found: 1,2,4-triazine 4-oxides bearing ortho-halophenyl in the 3-position react with phenylacetonitrile under basic conditions to form 3-(2-oxyphenyl)[1,2,4]triazolo[4,3-b]pyridazines, while the reactions of 3,6-diaryl-1,2,4-triazin 4-oxides with sodium ethyl cyanoacetate afforded 2-aminopyridazines.
\\\\Expert2\\nbo\\Mendeleev Communications\\2005, v.15, p.31.pdf
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2.

Вид документа : Статья из журнала
Шифр издания : Г/T 82
Автор(ы) : Semenova A. M., Pervova M. G., Ezhikova M. A., Kodess M. I., Zapevalov A. Y., Pestov A. V.
Заглавие : Transesterification of dialkyl carbonates with fluorine-containing alcohols
Место публикации : Russian chemical bulletin. - 2021. - Vol. 70, № 5. - С. 933-936
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of transesterification of dimethyl, diethyl and dibutyl carbonates with 2,2,3,3-tetrafluoroethyl-, 2,2,3,3,4,4,5,5-octafluorobutyl- and 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluorohexyl-carbinols were investigated in the presence of various catalysts. It was found that the conversion of starting dialkyl carbonate increases upon increasing the length of fluorine-containing radical in the presence of sodium alkoxide. It was shown that the maximum conversion of dimethyl carbonate (90%) was achieved in its reaction with 2,2,3,3,4,4,5,5-octafluoropentan-1-ol upon using catalysts such as K2CO3, NaOH, and sodium alkoxide. To achieve similar values of the conversion, Ti(OEt)4 and Ti(OiPr)4 should be used in the cases of diethyl and dibutyl carbonates, respectively.
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3.

Вид документа : Статья из журнала
Шифр издания : 54/T 44
Автор(ы) : Kulikova T. V., Maiorova A. V., Shunyaev K.Yu., Gorbunova T. I., Saloutin V. I., Chupakhin O. N.
Заглавие : Thermodynamic modeling of the reaction of polychlorinated biphenyls with sodium methoxide
Место публикации : Russian Journal of General Chemistry. - 2013. - Vol.83, №5. - С. 893-900
Примечания : Библиогр.: с. 900 (17 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): thermodynamic modeling --sodium methoxide--polychlorinated biphenyls
Аннотация: Thermochemical parameters, like standard enthalpy of formation (ΔH 298 0), enthalpy increment from 0 to 298 K (H 298 0 - H 0 0), standard heat capacity (C p298 0) and its temperature dependence [Cp(T)], and entropy (S 298 0), were calculated for the gaseous methoxy derivatives formed from polychlotinated biphenyl (PCB) congeners. Thermodynamic modeling and the HSC software were used to evaluate the reactivity of PCB congeners toward sodium methoxide in DMSO, and the calculation results were compared with experimental data
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mozharovskaia P. N., Ivoilova A. V., Drokin R. A., Ivanova A. V., Kozitsina A. N., Rusinov V. L.
Заглавие : The electrochemical behavior’s character of a potential antiviral drug 3-nitro-4-hydroxy-7-methylthio-4H-[1,2,4]triazolo[5,1-c][1,2,4]triazinide monohydrate
Место публикации : Chimica Techno Acta. - 2022. - Vol. 9, № 4. - Ст.20229426
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): nitroheterocyclic compounds--antiviral activity--cyclic voltammetry
Аннотация: The results of this study of the electrochemical transformation of 3-R-4-hydroxy-1,4-dihydro-7-X-1,2,4-triazolo[5,1-c][1,2,4] obtained by voltammetry are presented. It was found that 3-R-4-hydroxy-1,4-dihydro-7-X-1,2,4-triazolo[5,1-c][1,2,4] derivatives are capable of electrochemical reduction in the potential range of -0.28 to -0.33 V (relative to Ag/AgCl) in Britton-Robinson buffer at pH = 2. The electrochemical behavior of the sodium salt of 3-nitro-4-hydroxy-7-methylthio-4H-[1,2,4]triazolo[5,1-c][1,2,4]triazinide monohydrate (compound 1), which in silico modeling predicted possible biological activity against various tick-borne encephalitis and Coxsackie B3 viruses. At the potentials of the first stage of electroreduction at pH = 2, the main transformation process is the three-electron reduction scheme of the nitro group of compound 1. It was established that compound 1 in an aprotic medium is reduced in ionic form, most likely in the form of an ion pair with the Na+ cation, and in an aqueous medium in the form of a protonated particle. Based on this, a scheme was proposed for the probable electrochemical transformation of the studied compound.
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5.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Shchegol'kov E. V., Khudina O. G., Anikina L. V., Burgart Ya. V., Saloutin V. I.
Заглавие : Synthesis, analgesic and antipyretic activity of 2-(antipyrin-4-yl)hydrazones of 1,2,3-triketones and their derivatives [Electronic resource]
Место публикации : Pharmaceutical Chemistry Journal. - 2006. - Vol. 40, № 7. - С. 373-376
Систем. требования: http://www.springerlink.com/content/8137581016563700/fulltext.pdf
Примечания : Библиогр. : с. 376 (10 назв.). - 1.11.2011 г.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 1,2,3-Triketone 2-(antipyrin-4-yl)hydrazones were synthesized via the azo-coupling reactions of 1,3-diketones with 2-(antipyrin-4-yl)diazonium chloride. The fluoroalkyl-containing hetarylhydrazone enters into cyclocondensation with hydrazines at the 1,3-dicarbonyl fragment to yield 3-tetrafluoroethyl derivatives of pyrazole. It was found that 1,2,3-triketone 2-(antipyrin-4-yl)hydrazones and N-(2-hydroxyethyl)-substituted pyrazole exhibit analgesic activity comparable with that of their structural analog analgin (metamizole sodium), but do not possess antipyretic properties. In contrast, N-phenyl-substituted pyrazole did not exhibit analgesic properties but produced a certain antipyretic effect four hours after pyrogenic administration. Fluoroalkyl-containing compounds are less toxic substances than nonfluorinated 2-(antipyrin-4-yl)hydrazone and analgin.
\\\\Expert2\\nbo\\Pharmaceutical Chemistry Journal\\2006, 40 (7), 373-376.pdf
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Solovyova Y. V., Pestov A. V., Puzyrev I. S., Pervova M. G., Kuznetsov V. A., Vlasov I. A., Artemiev G. A.
Заглавие : Synthesis of δ-Valerolactone Using Stable Hydrogen Peroxide Derivatives
Место публикации : Russian Journal of Organic Chemistry. - 2022. - Vol. 58, № 4. - С. 480-483
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The efficiencies of hydrogen peroxide derivatives in the Baeyer–Villiger oxidation of cyclopen­tanone to δ-valerolactone have been compared. The oxidants used were hydrogen peroxide in acetic, formic, or trifluoroacetic acid, magnesium and sodium monoperoxyphthalates, cumene hydroperoxide, and tert-butyl hydroperoxide. The oxidation was carried out in water, aqueous methanol, and water–ethyl acetate. Sodium and magnesium monoperoxyphthalates turned out to provide high conversion and selectivity under mild conditions.
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7.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Filyakova V. I., Slepukhin P. A., Boltacheva N. S., Letova E. B., Charushin V. N.
Заглавие : Synthesis of podands modified with thiosemicarbazide and fluoroalkyl(hydroxy)pyrazoline fragments
Место публикации : Russian Journal of General Chemistry. - 2017. - Vol. 87, № 5. - С. 957-962
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): podandes--x-ray diffraction analysis --acetic acid--organic acids
Аннотация: 1,8-Bis(diisothiosemicarbazido)-3,6-dioxaoctane have been synthesized by subsequent treatment of 2,2 -(ethylenedioxy)bisethylamine with carbon disulfide, sodium chloroacetate, and hydrazine hydrate. 1,8-Bis- (diisothiosemicarbazido)-3,6-dioxaoctane has reacted with lithium 1,1-difluoropenta-2,4-dionate in glacial acetic acid to yield 1,8-bis[5R*,5 R*(5-hydroxy-5-difluoromethyl-4,5-dihydro-3-methyl-1H-pyrazol-1-yl)-1-carbothioamido]-3,6-dioxaoctane. The molecular and crystal structure of the product has been determined by X-ray diffraction analysis.
\\\\Expert2\\NBO\\Russian Journal of General Chemistry\\2017 V 87 P957.pdf
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8.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Filyakova V. I., Kodess M. I., Zapevalov A. Ya., Saloutin V. I.
Заглавие : Synthesis of perfluoro- and 2-trifluoromethylpentafluoro-dihydrofurans and their epoxy derivatives [Electronic resource]
Место публикации : Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2003. - Vol. 39, № 7. - С. 1010-1015
Систем. требования: http://www.springerlink.com/content/tk65261645q64317/fulltext.pdf
Примечания : Bibliogr. : p. 1015 (11 ref.). - 31.10.2011 г.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Perfluorotetrahydrofuran-2-carboxylic acid was converted through a series of transformations into perfluoro-2,3-dihydrofuran and perfluoro-2,5- dihydrofuran; likewise, from (2-perfluorotetrahydrofuryl)difluoroacetic acid 2-trifluoromethylpentafluoro-2,3-dihydrofuran was obtained. Perfluoro-2,3- dihydrofuran and 2-trifluoromethylpentafluoro-2,3-dihydrofuran underwent isomerization into perfluoro-2,5-dihydrofuran and 2-trifluoromethylpentafluoro- 2,5-dihydrofuran by the action of cesium fluoride. Treatment of perfluoro-2,5-dihydrofuran with SbF5 resulted in ring opening and formation of cis-perfluoro-2-butenoyl fluoride, while 2- trifluoromethylpentafluoro-2,3-dihydrofuran was converted into 2-trifluoromethylpentafluoro-2,5-dihydrofuran under the same conditions. Perfluoro-3,4-epoxytetrahydrofuran and 2-trifluoromethyl-3,4-epoxypenta- fluorotetrahydrofuran containing fused oxirane and tetrahydrofuran rings were synthesized by reactions of perfluoro-2,5-dihydrofuran and 2- trifluoromethylpentafluoro-2,5-dihydrofuran, respectively, with sodium hypochlorite.
\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2003, 39 (7), 1010.pdf
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9.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Rodygin K. S., Rubtsova S.A., Slepukhin P. A., Kuchin A. V.
Заглавие : Synthesis of new fluorine-containing pyrazolo[3,4-b]pyridinones
Место публикации : Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2011. - Vol.60, №4. - С. 733-745
Примечания : Bibliogr. : p. 745 (28 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): microwave irradiation--aminopyrazoles--arylsulfanyl(difluoro)methyl group
Аннотация: Methods for the synthesis of 4 R 6,7 dihydro 1H pyrazolo[3,4 b]pyridin 6 ones (R = CF2SAr and 4 CFHSAr) were developed. The derivatives with R = CF2SAr were ob tained by both heterocyclization of 1 substituted 5 aminopyrazoles with ethyl 4,4 difluoro 3 oxo 4 phenylsulfanylbutanoate and replacement of the Br atom in 4 bromodifluoromethyl 6,7 dihydro 1H pyrazolo[3,4 b]pyridin 6 ones by sodium arenethiolates. The fragment 4 CF HSAr was introduced by replacement of the Cl atom in 4 chlorofluoromethyl 6,7 dihydro 1H pyrazolo[3,4 b]pyridin 6 ones by sodium arenethiolates. Oxidation of 4 CF2SPh 6,7 dihydro 1H pyrazolo[3,4 b]pyridin 6 ones gave the corresponding sulfoxides; their structures were con firmed by X ray diffraction data
\\\\expert2\\NBO\\Russian Chemical Bulletin\\2011, 60 (4), 733-745.pdf
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10.

Вид документа : Статья из журнала
Шифр издания : 54/K 96
Автор(ы) : Kuznetsov V. A., Pervova M. G., Yatluk Yu. G.
Заглавие : Synthesis of epsilon-caprolactone with stable hydrogen peroxide adducts
Место публикации : Russian Journal of Applied Chemistry. - 2013. - Vol.86, №2. - С. 176-181
Примечания : Библиогр.: с. 181 (16 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): cyclohexanone --e-caprolactone --hexafluoroisopropanol
Аннотация: Oxidation of cyclohexanone to ɛ-caprolactone with stable industrially manufactured hydrogen peroxide derivatives: adduct with urea (urea hydrogen peroxide), sodium perborate, sodium percarbonate (Persol), magnesium monoperphthalate (Dismozon) was studied. Oxidation with urea hydrogen peroxide is the most efficient in hexafluoroisopropanol in the case of preliminary removal of urea in the form of an oxalate. Oxidation with sodium perborate and percarbonate provides high yields in trifluoroacetic acid. The lowest cost process consists in interaction with sodium monoperphthalate (Persol and phthalic anhydride) in an aqueous medium
\\\\expert2\\NBO\\Russian Journal of Applied Chemistry\\2013, v. 86, N 2, p.176.pdf
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