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1.
Инвентарный номер: нет.
   


   
    2-Aminooxazoles as novel dienophiles in the inverse demand Diels–Alder reaction with 1,2,4-triazines / A. P. Krinochkin, G. Mallikarjuna Reddy, D. S. Kopchuk [et al.] // Mendeleev Communications. - 2021. - Vol. 31, № 4. - P542-544
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
1,2,4-TRIAZINES -- OXAZOL-2-AMINES -- DIELS–ALDER REACTION -- 2,2'-BIPYRIDIN-3-OLS
Аннотация: High temperature coupling of 6-aryl-5-cyano-3-(pyridin-2-yl)-1,2,4-triazines with 2-amino-4-aryloxazoles proceeds as the inverse demand Diels–Alder reaction between the oxazole moiety as dienophile and the 1,2,4-triazine moiety as diene to construct new 4,5-diaryl-6-cyano-3-hydroxypyridin-2-yl fragment. A reaction mechanism is proposed, and the structure of the key-product is proved by the X-ray diffraction analysis.

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2.
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    9-ethyl-3-{6-(het)aryl-[1,2,5]oxadiazolo[3,4-b]pyrazin-5-yl}-9H-carbazoles: synthesis and study of sensitivity to nitroaromatic compounds / E. V. Verbitskiy, Y. A. Kvashnin, G. L. Rusinov, V. N. Charushin, A. A. Baranova, Y. A. Yakovleva, K. O. Khokhlov // Russian chemical bulletin. - 2018. - Vol. 67, № 6. - P1078-1082
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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3.
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    9-этил-3-{6-(гет)арил-[1,2,5]оксадиазоло[3,4-b]пиразин-5-ил}-9H-карбазолы: синтез и изучение сенсорных свойств в отношении нитроароматических соединений / Е. В. Вербицкий, Ю. А. Квашнин, А. А. Баранова, Ю. А. Яковалева, К. О. Хохлов, Г. Л. Русинов, В. Н. Чарушин // Известия Академии наук. Серия химическая. - 2018. - № 6. - С. 1078-1082
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ФУРАЗАНО[3, 4-B]ПИРАЗИНЫ -- С-Н-ФУНКЦИОНАЛИЗАЦИЯ -- КАРБАЗОЛЫ -- ТУШЕНИЕ ФЛУОРЕСЦЕНЦИИ -- ХЕМОСЕНСОРЫ
Аннотация: Прямой некатализируемой переходными металлами функционализацией С-Н-связи в пиразиновом кольце осуществлен синтез 5-(9-этил-9Н-карбазол-3-ил)-замещенных 6-(гет)арил[1,2,5]оксадиазоло[3,4-b]пиразинов. Изучены их фотофизические и сенсорные свойства по отношению к парам нитробензола и 2,4-динитротолуола с использованием мобильного обнаружителя нитровзрывчатых веществ «Нитроскан» (Екатеринбург, Россия).

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4.
Инвентарный номер: нет.
   
   A 10


   
    A new approach to 4-arylstyrenes: microwave-assisted synthesis and photophysical properties / M. Z. Eddin, M. G. Pervova, E. F. Zhilina [et al.] // Russian chemical bulletin. - 2021. - Vol. 70, № 11. - P2139-2144
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
STYRENE -- 4-VINYLBIPHENYL DERIVATIVES -- SUZUKi—MIYAURA CROSS-COUPLING -- FLUORESCENCE

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5.
Инвентарный номер: нет.
   
   A 10


   
    A new synthesis of 4'-trifluoromethyl-2,2':6',2"-terpyridine / V. I. Filyakova, N. S. Boltacheva, M. G. Pervova, V. N. Charushin // Mendeleev Communications. - 2021. - Vol. 31, № 3. - P388-389
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ORGANOFLUORINE COMPOUNDS -- b-AMINOVINYL KETONES -- REGIOISOMERISM -- HETEROCYCLIZATION -- PYRIDINES -- 2,2':6',2''-TERPYRIDINES
Аннотация: Reflux of two isomeric 3-amino-4,4,4-trifluoro-1-(2-pyridyl)but-2-en-1-one and 3-amino-1,1,1-trifluoro-4-(2-pyridyl)-but-3-en-2-one in acetic acid affords 4′-trifluoromethyl-2,2′:6′,2″-terpyridine (37%) with 1.4% admixture of 6′-trifluoromethyl-2,2′:4′,2″-terpyridine.

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6.
Инвентарный номер: нет.
   
   A 10


   
    A practicable synthesis of 2,3-disubstituted 1,4-dioxanes bearing a carbonyl functionality from α,β-unsaturated ketones using the williamson strategy / A. De, A. Majee, S. Santra [et al.] // Organic & biomolecular chemistry. - 2021. - Vol. 19, № 6. - P1278-1286
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: We have observed that a reagent combination of NaIO4 and NH2OH·HCl reacts with α,β-unsaturated ketones followed by the nucleophile ethylene glycol allowing the synthesis of 2,3-disubstituted 1,4-dioxanes using cesium carbonate as a base under Williamson ether synthesis. This reaction is useful for the synthesis of functionalized 1,4-dioxane having a carbonyl functionality. A variety of 2,3-disubstituted 1,4-dioxanes have been synthesized using these reaction conditions. A probable reaction mechanism has also been proposed.

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7.
Инвентарный номер: нет.
   
   A 22


   
    Adsorption properties of mesoporous carbon synthesized by pyrolysis of zinc glycerolate / I. S. Puzyrev, E. I. Andreikov, V. A. Osipova [et al.] // Russian chemical bulletin. - 2021. - Vol. 70, № 5. - P805-810
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Mesoporous carbon of lamellar morphology was synthesized by the thermal decomposition of zinc glycerolate in an inert atmosphere followed by the removal of zinc oxide from the ZnO/C composite. The obtained material was characterized by scanning electron microscopy, Raman spectroscopy, and low-temperature adsorption of nitrogen. Mesoporous carbon is remarkable for a high adsorption rate of methylene blue dye from aqueous solutions with the maximum adsorption capacity toward the dye equal to 1680 mg g−1.

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8.
Инвентарный номер: нет.
   
   A 53


   
    An expedient solvent-free c-benzylation of 4-hydroxycoumarin with styrenes / R. Chatterjee, A. Majee, A. Mukherjee [et al.] // Mendeleev Communications. - 2021. - Vol. 31, № 1. - P123-124
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: An efficient straightforward solvent-free C(3)-benzylation of 4-hydroxycoumarin with styrenes is performed by heating the reactants in the presence of p-toluenesulfonic acid. By this procedure, benzylated 4-hydroxycoumarin derivatives which exhibit various biological activities were obtained.

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9.
Инвентарный номер: нет.
   
   A 99


   
    Azapyrene-based fluorophores: synthesis and photophysical properties / O. S. Taniya, A. F. Khasanov, M. V. Varaksin [et al.] // New Journal of Chemistry. - 2021. - Vol. 45, № 45. - P20955-20971
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Azapyrenes are the nitrogen isosteres of pyrene. Based on theoretical and experimental studies, electron–acceptor azapyrene domains may be considered as convenient scaffolds for constructing a large variety of “push–pull” π-conjugated chromophores with pronounced ICT properties. Over the past decade, due to the unrelenting interest in functional materials and modern methodologies such as cross-coupling, peri-annulation, direct C–H-functionalization, etc., methods for the synthesis of aryl(alkyl) K-functionalized azapyrenes and other derivatives have been developed, and their photophysical and electrochemical properties have been studied. This short review aims at critical analysis of the best known/modern methods for the preparation of functionalized azapyrene derivatives, as well as an assessment of their photophysical/electrochemical properties in comparison with the structural and electronic properties of the parent pyrene.

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10.
Инвентарный номер: нет.
   
   B 24


    Barabanov, M. A.
    Biological activity and synthesis of 5,6-dihydroxyindole-2-carboxylic acid – biosynthetic precursor of melanins (microreview) / M. A. Barabanov, G. S. Martyanov, A. V. Pestov // Chemistry of Heterocyclic Compounds. - 2021. - Vol. 57, № 4. - P417-419
УДК
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The microreview considers the biological activity and methods of obtaining natural melanin pigments and their biosynthetic precursor 5,6-dihydroxyindole-2-carboxylic acid. The key methods for the synthesis of 5,6-dihydroxyindole-2-carboxylic acid, published over the past 8 years (20122020), are presented.

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11.
Инвентарный номер: нет.
   
   B 68


   
    Blue-light-promoted radical c-h azolation of cyclic nitrones enabled by selectfluor® / A. A. Akulov, M. V. Varaksin, A. N. Tsmokalyuk [et al.] // Green Chemistry. - 2021. - Vol. 23, № 5. - P2049-2057
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: An original approach to achieve the C(sp2)–H azolation of cyclic aldonitrones mediated by Selectfluor® has first been employed. By exploiting a metal-free, visible-light-promoted cross-dehydrogenative C–N coupling reaction between model aldonitrones, 2H-imidazole 1-oxides, and NH-containing azoles, a series of novel azaheterocyclic derivatives have been obtained in yields up to 94%. The elaborated protocol has proved to be appropriate for gram-scale processes and displayed potential for utilization in the synthesis of novel structural analogues of lanabecestat. Besides, mechanistic studies have revealed that this coupling reaction is likely to proceed via a nitroxide-involving radical pathway, encompassing a chain of electron transfer events, such as hydrogen atom transfer (HAT) and single electron transfer (SET).

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12.
Инвентарный номер: нет.
   
   C 55


   
    Choice of optimal conditions for the dynamic concentration of silver(I) ions from complex solutions with sulfoethylated polyaminostyrenes / L. M. Alifkhanova, Y. S. Petrova, S. N. Bosenko [и др.] // Russian Journal of Inorganic Chemistry. - 2021. - Т. 66, № 4. - С. 578-585
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: This work was intended to study the selectivity of silver(I) ion adsorption with sulfoethylated polyaminostyrenes under dynamic conditions. The greatest selectivity of the extraction of silver(I) ions in the presence of copper(II) ions is at pH 6.0 and a solution flow rate of 2 mL/min. The breakthrough curves of metal adsorption were obtained in the joint presence of sorbates from ammonium acetate buffer solution. The dynamic capacities of adsorbents, rate constants of reactions, and 50% sorbate breakthrough times were determined. The silver(I) adsorption selectivity increases with an increase in degree of substitution of polyaminostyrenes. The breakthrough curves were fitted with the Thomas, Adams–Bohardt, and Yoon–Nelson models. For the quantitative desorption of silver(I) ions from the adsorbents, 20.0 mL of 1 M nitric acid is most appropriate.

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13.
Инвентарный номер: нет.
   
   C 73


   
    Combination of the Snh/aza-diels–alder reactions as effective synthetic approach to 8-hydroxy(methoxy)-substituted 2-[6-(1-methylindol-3-yl)pyridin-2-yl]quinoline ligands/fluorophores / M. I. Savchuk, D. S. Kopchuk, I. N. Egorov [et al.] // Russian Journal of General Chemistry. - 2021. - Vol. 91, № 5. - P779-784
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
AZA-DIELS–ALDER REACTION -- 1,2,4-TRIAZINES -- 8-METHOXYQUINOLINE -- DEMETHYLATION -- AUTOCLAVE
Аннотация: 8-Hydroxy(methoxy)-substituted 2-[6-(1-methylindol-3-yl)pyridin-2-yl]quinoline ligands were synthesized by means of combination of SNH reaction between 8-methoxy-substituted 2-(6-aryl-1,2,4-triazin-3-yl)quinolones and indole and aza-Diels–Alder reaction of the obtained 1,2,4-triazines with 2,5-norbornadiene. The demethylation of quinoline moiety of 1,2,4-triazine precursor during aza-Diels–Alder reaction in autoclave was demonstrated.

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14.
Инвентарный номер: нет.
   
   D 46


   
    Design and antioxidant properties of bifunctional 2H-imidazole-derived phenolic compounds-a new family of effective inhibitors for oxidative stress-associated destructive processes / E. L. Gerasimova, E. R. Gazizullina, M. V. Borisova [et al.] // Molecules. - 2021. - Vol. 26, № 21. - Ст. 6534
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
2H-IMIDAZOLE -- POLYPHENOLS -- ANTIOXIDANT CAPACITY -- ANTIRADICAL CAPACITY
Аннотация: The synthesis of inhibitors for oxidative stress-associated destructive processes based on 2H-imidazole-derived phenolic compounds affording the bifunctional 2H-imidazole-derived phenolic compounds in good-to-excellent yields was reported. In particular, a series of bifunctional organic molecules of the 5-aryl-2H-imidazole family of various architectures bearing both electron-donating and electron-withdrawing substituents in the aryl fragment along with the different arrangements of the hydroxy groups in the polyphenol moiety, namely derivatives of phloroglucinol, pyrogallol, hydroxyquinol, including previously unknown water-soluble molecules, were studied. The structural and antioxidant properties of these bifunctional 5-aryl-2H-imidazoles were comprehensively studied. The redox transformations of the synthesized compounds were carried out. The integrated approach based on single and mixed mechanisms of antioxidant action, namely the AOC, ARC, Folin, and DPPH assays, were applied to estimate antioxidant activities. The relationship “structure-antioxidant properties” was established for each of the antioxidant action mechanisms. The conjugation effect was shown to result in a decrease in the mobility of the hydrogen atom, thus complicating the process of electron transfer in nearly all cases. On the contrary, the conjugation in imidazolyl substituted phloroglucinols was found to enhance their activity through the hydrogen transfer mechanism. Imidazole-derived polyphenolic compounds bearing the most electron-withdrawing functionality, namely the nitro group, were established to possess the higher values for both antioxidant and antiradical capacities. It was demonstrated that in the case of phloroglucinol derivatives, the conjugation effect resulted in a significant increase in the antiradical capacity (ARC) for a whole family of the considered 2H-imidazole-derived phenolic compounds in comparison with the corresponding unsubstituted phenols. Particularly, conjugation of the polyphenolic subunit with 2,2-dimethyl-5-(4-nitrophenyl)-2H-imidazol-4-yl fragment was shown to increase ARC from 2.26 to 5.16 (104 mol-eq/L). This means that the considered family of compounds is capable of exhibiting an antioxidant activity via transferring a hydrogen atom, exceeding the activity of known natural polyphenolic compounds.

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15.
Инвентарный номер: нет.
   
   D 47


   
    Detection of nitroaromatic explosives by 2-amino-3-ethoxycarbonyl-6-(1-methylindol-3-yl)-5-(4-chlorophenyl)-pyrazine and its derivatives / O. S. Taniya, L. K. Sadieva, I. S. Kovalev, G. V. Zyryanov, D. S. Kopchuk, V. L. Rusinov, O. N. Chupakhin // Современные синтетические методологии для создания лекарственных препаратов и функциональных материалов (MOSM2018): вторая международная научно-практическая конференция : материалы и доклады. - Екатеринбург, 2019. - С. 211
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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16.
Инвентарный номер: нет.
   
   E 27


   
    Effect of polarity of solvent on silanization of halloysite nanoclay using (3-glycidyloxy propyl) trimethoxy silane / A. M. Abu el-Soad, A. V. Pestov, N. A. Martemyanov [et al.] // Journal of inorganic and organometallic polymers and materials. - 2021. - № 31. - P2569–2578
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The grafting of silane groups on clay surfaces has been recently investigated in order to fabricate versatile compounds with new potential applications in materials science and ecological engineering. This work explored the influence of variety of solvents with variable polarity on the silanization of halloysite nanoclay (HNT) surface by (3-Glycidyloxy propyl) trimethoxy silane. To this purpose, the functionalization of HNT by 3-Glycidyloxypropyltrimethoxysilane (GOPTMS) has been conducted in Ethanol (polar protic solvent), Tetrahydrofuran (THF) and Acetonitrile (polar aprotic solvents), and Hexane, 1,4-Dioxane and Toluene (non polar solvents). The silane grafted materials were characterized by using several techniques, including Fourier Transform Infrared Spectroscopy (FT-IR), elemental analysis, Scanning Electron Microscopy (SEM), Thermogravimetry (TGA), X-ray Diffraction Analysis (XRD) and Nitrogen adsorption/desorption isotherms. The largest silane loading has been detected for the hybrid nanomaterials prepared in Hexane as a dispersing medium.

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17.
Инвентарный номер: нет.
   
   E 27


   
    Effect of the nature of a fluorinated substituent on the synthesis of functionalized 1,3-diketones / Y. S. Kudyakova, A. Y. Onoprienko, Y. O. Edilova [et al.] // Russian chemical bulletin. - 2021. - Vol. 70, № 4. - P745-752
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The synthesis of alkali metal and copper(II) 1-polyfluoroalkyl-4,4-dimethoxypentane-1,3-dionates is reported. The subsequent treatment of these compounds with oxalic acid or ethylenediaminetetraacetic acid disodium salt affords functionalized 1,3-diketones. The nature of the polyfluoroalkyl substituent was found to affect the conditions of the Claisen condensation and the stability of the acetal group in acidic medium.

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18.
Инвентарный номер: нет.
   
   E 27


   
    Efficient synthesis of 5-[3(4)-(5-phenyl-1,3,4-oxаdiаzol-2-yl)­anilino]-1,2,4-triаzines / A. P. Krinochkin, M. R. Guda, D. S. Kopchuk [et al.] // Russian Journal of Organic Chemistry. - 2021. - Vol. 57, № 10. - P1753-1756
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 1,2,4-Triazine derivatives containing a 3- or 4-(5-phenyl-1,3,4-oxadiazol-2-yl)anilino group on C5 were synthesized by nucleophilic substitution of the cyano group in 3,6-diaryl-1,2,4-triazine-5-carbonitriles under solvent-free conditions.

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19.
Инвентарный номер: нет.
   
   F 33


   
    Features of sorption preconcentration of noble metal ions with sulfoethylated amino polymers / L. M. Alifkhanova, K. Y. Lopunova, A. A. Marchuk [и др.] // Russian journal of inorganic chemistry. - 2021. - Vol. 66, № 6. - С. 909-915
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Dependencies for the sorption of palladium(II), gold(III), and platinum(IV) chloro complexes from individual and binary solutions with sorbents based on sulfoethylated polyallylamine and poly(aminostyrene) have been obtained. It has been found that predominant sorption mechanism is complexation with functional groups of the sorbents for gold(III) and palladium(II) and ion exchange for platinum(IV). It has been shown that increase in the sulfoethylation degree of aminopolymer matrix leads to decrease of platinum(IV) sorption and therefore, to increase in palladium(II) sorption selectivity relative to this ion. This effect is the largest for the sorbents based on polyallylamine. The conditions of quantitative desorption of the studied metals from sorbent surface have been determined. The sorption of gold(III) by the sorbent based on polyallylamine has been shown to be complicated by gold(III) reduction in sorbent phase.

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20.
Инвентарный номер: нет.
   
   F 33


    Fedorova, O. V.
    Metal oxides in multicomponent synthesis of heterocycles / O. V. Fedorova, Y. A. Titova, I. G. Ovchinnikova // Chemistry of Heterocyclic Compounds. - 2021. - Vol. 57, № 9. - P900–904
УДК
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HETEROCYCLIC COMPOUNDS -- METAL OXIDES -- CHEMOSELECTIVE SYNTHESIS
Аннотация: In this review we consider the possibilities for using metal oxides as heterogeneous catalysts of multicomponent reactions, leading to pharmacologically relevant heterocyclic compounds. Publications from years 2013–2021 are analyzed. The information has been arranged according to the number of atoms in the target heterocycle.

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