L 79 Liquid-phase oxidation of anthracene by hydrogen-peroxide in the presence of vanadium-oxide bronzes CuXV2O5 [Text] / S. Y. Men'shikov, A. V. Vurasko, L. A. Petrov, V. L. Volkov, A. A. Novoselova // Pet-Chem Equipment Corp. - 1992. - Vol. 32, N 2. - P128-130 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Vanadium oxide bronzes of the general formula CuXV2O5, where 0x1, catalyse the liquid-phase oxidation of anthracene H2O2. The anthracene conversion and the selectivity with respect to anthraquinone are maximum withing the region of beta- and xi-phases respectively close to the compositions CuO. 6V2O5 and CuO.95V2O5. |
K 80 Kozhevnikov, D. N. Sigma-adducts of 1,2,4-triazine 4-oxides with Nucleophiles. I.Site Selectivity for the Addition Reaction Controlled by Strength of Acids [Text] : доклад, тезисы доклада / D. N. Kozhevnikov, O. N. Chupakhin, V. L. Rusinov // International Memorial I.Postovsky Conference on Organic Chemisty, Ekaterinburg, March 17-20, 1998 : program and abstracts. - Ekaterinburg, 1998. - P79 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
N 52 New hybrid chelating sorbents with grafted 3-aminopropionate groups based on mixed silicon, aluminum, titanium, or zirconium oxides [Electronic resource] / Yu. G. Yatluk, N. A. Zhuravlev, O. V. Koryakova, L. K. Neudachina, Yu. A. Skorik // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2005. - Vol. 54, № 8. - P1836-1841 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A series of new hybrid organo-inorganic sorbents with the 3-aminopropionate chelating group was synthesized. The synthesis includes the copolycondensation (sol—gel method) of tetraethoxysilane, 3-aminopropyltriethoxysilane, and several modifiers (MeSi(OEt)3, EtSi(OEt)3, Ti(OEt)4, AlONO3, ZrOCl2) followed by carboxyethylation with acrylic acid. The obtained chelating sorbents were characterized by elemental analysis, FT-IR and 1H NMR spectroscopy, and thermogravimetry. The N-carboxylated sorbents have a higher sorption capacity with respect to metal ions (0.5–0.9 mmol g?1, pH 6.3, NH4OAc, 20 °C) than the starting sorbents with the primary amino group (0.05–0.2 mmol g?1) and manifest high selectivity for copper(II) ion extraction \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2005, 54 (8), 1836.pdf |
S 98 Synthesis and sorption properties of new hybrid chelating sorbents with ?-alanine functional groups [Electronic resource] / Yu. G. Yatluk, D. V. Eremin, L. K. Neudachina, Yu. A. Skorik // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2004. - Vol. 53, № 12. - P2730-2735 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A series of gamma-aminopropylsilylated sorbents was obtained from different oxide supports (silica gels, silica fillers, macroporous glasses, alumina) and by the direct synthesis (hydrolytic polycondensation of tetraalkoxysilanes with gamma-aminopropyltriethoxysilane). The highest degree of immobilization was achieved for silicas, while the most convenient solvent was methanol. Sorbents with beta-alanine functional groups were obtained by the subsequent reaction with acrylic acid. The degree of beta-carboxyethylation was 1.3–1.9, and the highest content of functional groups (vCOOH = 3.23 mmol g–1) was achieved for carboxyethylated xero gel synthesized by the copolycondensation of tetraethoxysilane with -aminopropyltriethoxysilane. The sorbents containing beta-alanine possess a higher selectivity of Cu2+ ion sorption than the initial gamma-aminopropylsilylated sorbents \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2004, 53 (12), 2730.pdf |
3,3,3-Trifluoro-N-(3-trifluoromethylphenyl)-1,2-propanediamine and its N-mono-and N,N-dicarboxyethyl derivatives: synthesis, protolytic and complexation properties [Electronic resource] / V. Yu. Korotaev, Yu. A. Skorik, A. Yu. Barkov, M. I. Kodess, A. Ya. Zapevalov // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2005. - Vol. 54, № 11. - P2545-2549 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: 3,3,3-Trifluoro-N-(3-trifluoromethylphenyl)-1,2-propanediamine (5) was synthesized by the reaction of 2-diazo-1,1,1-trifluoro-3-nitropropane or 3,3,3-trifluoro-1-nitropropene with 3-aminobenzotrifluoride followed by the reduction of the nitro group. The Michael 1,4-addition of diamine 5 to acrylic acid occurs only at the N(1) atom and affords N-mono-or N,N-dicarboxyethyl derivatives 6 and 7, depending on the reactant ratio. Protolytic equilibria 5–7 in aqueous solutions were studied by pH-potentiometry and UV spectroscopy. Only the aliphatic amino group can be protonated in an aqueous solution, while the aromatic amino group remains unprotonated even in 12 M HCl. The stability constants of transition metal (Cu2+, Ni2+, Zn2+) complexes with ligands 5–7 were determined by pH-potentiometric titration. The stability of the complexes and selectivity of the ligands toward Cu2+ ions increase with an increase in the number of N-carboxyethyl groups \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2005, 54 (11), 2545.pdf |
S 66 Skorik, Yu. A. Evaluation of various chitin-glucan derivatives from Aspergillus niger as transition metal adsorbents [Text] / Yu. A. Skorik, A. V. Pestov, Yu. G. Yatluk // Bioresource Technology . - 2010. - Vol. 101, № 6. - P1769-1775 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A number of chelating resins were prepared by chemical derivatization of the chitin-glucan (CG) complex isolated from Aspergillus niger biomass, namely chitosan-glucan (CsG), O-carboxymethyl-chitin-glucan (CM-CG), O-(2-sulfoethyl)chitin-glucan (SE-CG), and N-(2-carboxyethyl)chitosan-glucan (CE-CsG). The chemical modification was confirmed by FT-IR and elemental analysis. Nanosecond electron beam irradiation was used to produce insoluble resins and to preserve the reactive functional groups. Batch experiments were carried out to evaluate the adsorption selectivity and capacity of the resins toward transition metal ions (Cu2+, Ni2+, Co2+, Zn2+). The resins showed good adsorption capability with the following selectivity series: Co2+ Ni2+ Cu2+ Zn2+. The total metal adsorption capacities of CG, CsG, CM-CG, SE-CG, and CE-CsG resins at pH 6.5 (ammonium acetate buffer) were found to be 0.205, 0.382, 1.752, 0.319, and 0.350 mmol g?1, respectively. Our results suggest that, depending on the type of chemical modification, the chitin-glucan complexes can be used either for selective Cu2+ removal (CsG) or for total transition metal adsorption (CM-CG) from aqueous effluents |
C 31 Catalytic effect of nanosized metal oxides on the Hantzsch reaction [Text] / O. V. Fedorova, O. V. Koryakova, M. S. Valova, I. G. Ovchinnikova, Yu. A. Titova, G. L. Rusinov, V. N. Charushin // Kinetics and Catalysis. - 2010. - Vol. 51, № 4. - P566-572 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): METAL OXIDES -- HANTZSCH REACTION -- ALUMINUM OXIDES Аннотация: The effect of nanosized copper and aluminum oxides, which have a higher sorption capacity than that of bulk samples, on the Hantzsch reaction was studied. The adsorption of starting benzaldehydes and ethyl acetoacetate on the surface of copper and aluminum nanooxides resulted in the activation of these molecules and accelerated the Hantzsch reaction. In addition, considerable activation of ammonia and intermediates (chalcone and enamine) on the surface of aluminum nanooxide facilitated an increase in the rate and selectivity of the process. The experimental results were used to develop a one-pot method for the preparation of nifedipine and nitrendipine \\\\Expert2\\nbo\\Kinetics and Catalysis\\2010, v. 51, N 4, p. 566-572.pdf |
T 45 Thiocarbamoyl chitosan as a novel sorbent with high sorption capacity and selectivity for the ions of gold(III), platinum(IV), and palladium [Electronic resource] / A. V. Pestov, S. Yu. Bratskaya, A. Slobodyuk, V. A. Avramenko, Yu. G. Yatluk // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2010. - Vol. 59, № 7. - P1303-1306 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CHITOSAN -- THIOCARBAMOYL CHITOSAN -- IONS OF GOLD(III) Аннотация: Thiocarbamoyl chitosan (TCC) was synthesized by grafting thiourea on chitosan backbone in eutectic composition of ammonium thiocyanate—thiourea. Insoluble products with the amno group functionalization degree of 0.3–1.1 can be prepared by varying the conditions of polymer-analogous (synthesis in a gel) transformation. Structure of the synthesized chitosan derivatives was characterized by elemental analysis, diffuse reflectance infrared spectroscopy, and the solid state 13C NMR. Study of sorption properties of TCC shows high sorption capacity and selectivity for the ions of gold(III), platinum(IV), and palladium(II) as evidenced by results obtained at pH 2 in the presence of 100–1000-fold excess of iron(III), copper(II), zinc(II), and nickel(II). Sorption capacity of TCC for all ions increases with the increase in the degree of substitution and changes in the series: AuIII > PdII > PtIV \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2010, 59 (7), 1303-1306.pdf |
S 45 Selective mоnо-N-2-carboxyethylation of chitosan in the presence of magnesium halides [Text] / A. V. Pestov, M. I. Kodess, E. G. Matochkina, Yu. G. Yatluk // Carbohydrate Polymers. - 2011. - Vol. 86, № 2. - P783-788. - Bibliogr. : p. 787-788 (19 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The solubility of chitosan in aqueous solutions of lithium and magnesium halides varies in the order: LiCl LiBr LiI; MgCl2 MgBr2 MgI2. A method for selective production of mono-N-(2-carboxyethyl)chitosan (NCE-chitosan) was developed by synthesis in gel (concentration of chitosan 4-20%) of the magnesium halides solution (1.1-3.5 M) using acrylic acid. Using for reaction of MgI2 or MgBr2 provides relative greater amount of the monosubstituted amino groups (73-87%) in comparison with their absence (50-70%) at the high degree of substitution (DS) more than 0.7. DS of the prepared NCE-chitosan and the ratios mono-: disubstitution of amino groups was determined by 1H NMR spectroscopy. The chemical structure of the obtained NCE-chitosan was characterized by FT-IR and 13C NMR spectroscopies \\\\Expert2\\nbo\\Carbohydrate Polymers\\2011, v. 86, p.783.pdf |
S 98 Synthesis of chelating polymer sorbents by using the S-N(H) methodology / A. V. Pestov, P. A. Slepukhin, Yu. G. Yatluk, V. N. Charushin, O. N. Chupakhin // Journal of Applied Polymer Science . - 2012. - Vol.125, №3. - С. 1970-1978 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): FUNCTIONALIZATION OF POLYMERS -- PHENOL -- X-RAY ANALYSIS Аннотация: The article describes a new synthetic approach to modify the structure of phenol-formaldehyde and resorcinol-formaldehyde resins, which enables one to functionalize a polymer matrix by using the S?NH (nucleophilic aromatic substitution of hydrogen) methodology. Direct heteroarylation of phenol (resorcinol) fragments in polymer chains with 1,2,4-triazine derivatives illustrates a new synthetic method in the polymer chemistry. The feature of this methodology is that it provides an opportunity to accomplish direct one-pot polymer transformations by incorporating of rather complicated chelating groups through the displacement of hydrogen in phenol moieties. It has been shown that in order to obtain chemically modified polymers on the basis of phenol-formaldehyde and resorcinol-formaldehyde resins with a high degree of substitution with chelating units, a polymer matrix has to react with 3-(pyridin-2'-yl)-1,2,4-triazin-5(2H)-one. Also, it has been found that polymer sorbents with a high selectivity can be obtained by using the template method. Targeted synthesis of model compounds, as structural units of the chelating polymers, and elucidation of the structure of their complexes with copper (II) ions have shown that the most plausible type of coordination is formation of the bridge 1 : 1 complexes of the a,a'-bipyridinyl type. |
S 70 Sol-Gel Synthesis and Physicochemical Properties of Organosilicon Materials Functionalized by Amino Groups / L. K. Neudachina, N. V. Lakiza, A. V. Pestov, V. A. Osipova, L. V. Adamova, E. M. Gorbunova // Glass Physics and Chemistry. - 2011. - Vol.37, № 5. - С. 537-544 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): "SOL-GEL" MATERIALS -- AMINOPOLYSILOXANES -- SPECIFIC SURFACE AREA Аннотация: The hybrid materials based on polysiloxane modified by amino groups have been synthesized by the sol-gel method. Aminated polysiloxane has been prepared by the copolycondensation reaction of tetraethoxysilane with gamma-aminopropyltriethoxysilane (APS-1) and through the modification of the product (APS-2) of the hydrolysis of tetraethoxysilane by gamma-aminopropyltriethoxysilane. The composition of sorbents has been confirmed by the elemental analysis and IR Fourier spectroscopy. The high degree of sorption extraction of copper(II), nickel(II), cobalt(II), zinc(II), cadmium(II), and lead(II) ions in the case of their coexistence in an ammonia-acetate buffer solution has been observed for polysiloxanes APS-2. The synthesized surface-modified materials exhibit the highest selectivity to nickel(II) and cobalt(II) ions \\\\Expert2\\nbo\\Glass Physics and Chemistry\\2011, V. 37, N 5, P.537-544.pdf |
U 62 Unusual heterocyclization of chalcone podands with 3-amino-1,2,4-triazole / I. G. Ovchinnikova, M. S. Valova, E. G. Matochkina, M. I. Kodess, A. A. Tumashov, P. A. Slepukhin, O. V. Fedorova, G. L. Rusinov, V. N. Charushin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2011. - Vol.60, №5. - С. 965-974 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): TEMPLATE SYNTHESIS -- CHALCONE PODAND -- CROWN ETHERS Аннотация: A new type of intramolecular cyclization of 1,5-bis[2-(E-3-oxo-3-phenylprop-1-enyl)-phenoxy]-3-oxapentane with 3-aminotriazole promoted by potassium ions was discovered. A cascade mechanism for the formation of crownophane with 4,7-dihydro[1,2,4]triazolo[1,5-a]-pyrimidine fragment was suggested. Effects of oligooxyethylene fragment of the chalcone podand and acid-base catalysis on the selectivity of the cyclocondensation processes and degree of oxidation of triazolopyrimidine fragments were studied. The product structures were confirmed by IR, 1H and 13C NMR spectroscopy and X-ray diffraction study \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2011, 60 (5), 965-974.pdf |
S 98 Synthesis and properties of isomeric pyridyl-containing chitosan derivatives [Electronic resource] / S. YU. Bratskaya, Yu. A. Azarova, A. S. Portnyagin, A. Mechaev, A. Voit, A. V. Pestov // International Journal of Biological Macromolecules . - 2013. - С. 426-432. - Bibliogr. : p. 431-432 (49 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CHITOSAN -- PHYSICAL-CHEMICAL PROPERTIES -- PYRIDYL DERIVATIVE Аннотация: Here we report on the method of synthesis in gel of a new heterocyclic aminopolymer-N-2-(4-pyridyl)ethylchitosan (4-PEC) via direct addition of 4-vinylpyridine to chitosan that yields a derivative with the substitution degree (DS) up to 0.8. The comparison of reactivity, thermal, spectroscopic, and sorption properties of a new derivative and its isomer N-2-(2-pyridyl)ethylchitosan (2-PEC) is presented. 2-PEC has higher sorption capacity and forms more stable chelates with [PdCl4]2- and [PtCl6]2- ions than 4-PEC, but the latter shows higher selectivity to noble metals ions in the presence of Cl- ions. A gradual increase of the sorption capacities and the affinity coefficient for Cu2+ and Ni2+ in the row chitosan<4-PEC<2-PEC was related to the increase of electron donor nitrogen atoms content and chelating properties of 2-PEC. A nearly negligible increase of the 4-PEC sorption capacity for Ag+, as compared to plain chitosan, was suggested to be dependent on the difference in complexation models for 2-PEC and 4-PEC derivatives. The density functional theory (DFT) calculations have shown that the "pendant" model of the complex with Ag(I) is energetically favorable only for 2-PEC derivative, while in cases of chitosan and 4-PEC only "bridge" complexes can be formed that results in lower sorption capacity |
S 61 Simple synthesis and chelation capacity of N-(2-sulfoethyl)chitosan, a taurine derivative [Electronic resource] / Yu. S. Petrova, L. K. Neudachina, A. Mechaev, A. V. Pestov // Carbohydrate Polymers. - 2014. - Vol.112. - С. 462-468. - Bibliogr. : p. 467-468 (60 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CHITOSAN -- SELECTIVITY -- SORPTION Аннотация: This study presents a simple and effective synthesis method of N-(2-sulfoethyl)chitosan (NSE-chitosan) via a reaction between sodium 2-bromoethanesulfonate and chitosan that allows polymer transformation without using additional reagents and organic solvents. The chemical structure of the obtained NSE-chitosan was characterized by FT-IR and 1H NMR spectroscopies. Thermogravimetric study of NSE-chitosan coupled with FT-IR analysis has shown stability of the polymer up to 200 °C, which almost does not change with the increase of degree of substitution (DS). The sorption of transition and alkaline earth metal ions from multicomponent solutions on NSE-chitosan was investigated. The synthesized sorbents showed the selective recovery of silver(I) and copper(II) ions from ammonium acetate buffer solution. The increase of DS enhanced the selectivity to silver(I) ions sorption in comparison with copper(II) ions. Selectivity coefficients KAg/Cu increase from 1.3 to 10.9 with DS increasing up to 0.7 (ammonium acetate buffer solution, pH 6.5). Sorption isotherms of transition metal ions on NSE-chitosan with DS = 0.5 have been fitted using Langmuir, Freundlich, and Redlich-Peterson models. The maximum sorption capacities of sorbent in ammonium acetate buffer solution at pH 6.0 were 1.72 mmol/g for Cu(II), 1.23 mmol/g for Ag(I) and below 0.5 mmol/g for Co(II), Zn(II), Cd(II), Pb(II), Mn(II) and Ni(II) ions \\\\expert2\\nbo\\Carbohydrate Polymers\\2014, v. 112, p. 462.pdf |
O-97 Oxidation of terpenoid diols with chlorine dioxide. Easy preparation of α-hydroxyketones [Electronic resource] / L. L. Frolova, A. V. Popov, L. V. Bezuglaya, P. A. Slepukhin, A. V. Kuchin // Russian Journal of General Chemistry. - 2014. - Vol.84, №5. - С. 853-859. - Bibliogr. : p. 859 (16 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CHLORINE DIOXIDE -- OXIDATION -- SELECTIVITY Аннотация: Oxidative dehydrogenation of vicinal diols of bornane and pinane type with chlorine dioxide in dimethylformamide has yielded α-hydroxyketones with high selectivity. 3α-Hydroxy-10β-pinane-4-one has been prepared for the first time with yield of 63-65%; the product structure has been confirmed by X-ray diffraction studies \\\\expert2\\nbo\\Russian Journal of General Chemistry\\2014, V. 84, N 5, p. 853–859.pdf |
S 98 Synthesis of 2-Aryl-1,2,3-triazoles by Oxidative Cyclization of 2-(Arylazo)ethene-1,1-diamines: A One-Pot Approach [Electronic resource] / K. D Gavlik, S. G. Lesogorova, E. S. Sukhorukova, J. O. Subbotina, P. A. Slepukhin, E. Benassi, N. P. Belskaia // European Journal of Organic Chemistry. - 2016. - № 15. - С. 2700-2710 Рубрики: ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ Кл.слова (ненормированные): SYNTHETIC METHODS -- nUCLEOPHILIC ADDITION -- OXIDATIVE DEQUATERNIZATION Аннотация: A one-pot approach for the synthesis of 2-aryl-5-amino-1,2,3-triazoles is reported. This approach involves a tandem nucleophilic addition of alkylamines to hydrazonoyl cyanides and in situ oxidative cyclization of the resulting 2-(aryl-azo)ethene-1,1-diamines in the presence of copper(II) acetate and air. The described one-pot procedure is characterized by good yields, excellent selectivity, methodical simplicity, and uses readily available chemicals. This method was applied to the gram-scale synthesis of 2-aryl-1,2,3-triazoles. \\\\expert2\\NBO\\European Journal of Organic Chemistry\\2016, v. 15, p. 2700.pdf |
T 44 The portable detector of nitro-explosives in vapor phase with new sensing elements on a base of pyrimidine scaffold / A. A. Baranova, K. O. Khokhlov, R. D. Chuvashov, E. V. Verbitskiy, E. M. Cheprakova, G. L. Rusinov, V. N. Charushin // Journal of Physics: Conference Series. - 2017. - Vol. 830. - P012159[1-6] Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): PORTABLE DETECTOR -- NITROEXPLOSIVE -- VAPOR PHASE -- SENSING ELEMENT -- PYRIMIDINE SCAFFOLD -- C(5) MONO(HETEROARYL) -- C(4) MONO(HETEROARYL) -- DI(HETEROARYL) SUBSTITUTED -- PYRIMIDINES -- PYRIMIDINE RING -- VOLATILE INTERFERENT -- NITROSCAN -- TEMPERATURE 293 K TO 298 K Аннотация: In this paper, the new sensors based on the C(4) or/and C(5) mono(heteroaryl) and di(heteroaryl) substituted pyrimidines are described. The effect of different substituents in pyrimidine ring on the detection limits and selectivity for prepared sensors are explained. The results of detection towards various nitro-explosives and volatile interferents at room temperature with use of the portable detector “Nitroscan” are shown. \\\\Expert2\\NBO\\Journal of Physics Conference series\\2017 v.830 p.012159.pdf |
N 52 New modified 2-aminobenzimidazole nucleosides: Synthesis and evaluation of their activity against herpes simplex virus type 1 / M. I. Kharitonova, A. O. Denisova, A. L. Kayushin, I. D. Konstantinova, A. I. Miroshnikov, S. K. Kotovskaya, V. N. Charushin, V. L. Andronova, G. A. Galegov // Bioorganic and Medicinal Chemistry Letters. - 2017. - Vol. 27, № 11. - P2484-2487 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ANTIVIRAL ACTIVITY -- BENZIMIDAZOLES -- FLUORINATED COMPOUNDS -- NUCLEOSIDE PHOSPHORYLASES -- NUCLEOSIDES -- TRANSGLYCOSYLATION REACTION Аннотация: Using the enzymatic transglycosylation reaction β-d-ribo- and 2′-deoxyribofuranosides of 2-amino-5,6-difluorobenzimidazole nucleosides have been synthesized. 2-Amino-5,6-difluoro-benzimidazole riboside proved to exhibit a selective antiviral activity (selectivity index >32) against a wild strain of the herpes simplex virus type 1, as well as towards virus strains that are resistant to acyclovir, cidofovir, and foscarnet. We believe that this compound might be used for treatment of herpes infections in those cases, when acyclovir is not efficient. \\\\Expert2\\NBO\\Bioorganic and Medicinal Chemistry Letters\\2017 v.27 p.2484-2487.pdf |
Effect of complex-former ion concentration on the selectivity of metal ion sorption on cross-linked N-2-sulfoethylchitosan / Y. S. Petrova, L. K. Neudachina, M. Y. Oseeva, A. V. Pestov // Russian journal of inorganic chemistry. - 2018. - Т. 63, № 3. - P400-405 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
Design of fluorescent sensors based on azaheterocyclic push-pull systems towards nitroaromatic explosives and related compounds: a review / E. V. Verbitskiy, G. L. Rusinov, O. N. Chupakhin, V. N. Charushin // Dyes and pigments. - 2020. - Vol. 180. - P108414 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): NITROAROMATIC EXPLOSIVES -- FLUORESCENCE QUENCHING -- PYRIDINES -- PYRAZINE -- PYRIMIDINES -- TRIAZINES Аннотация: Highly sensitive and selective detection of nitro containing high energy organic compounds such as picric acid (PA), 2,4,6-trinitrotoluene (TNT) and 2,4-dinitrotoluene (DNT) has become a challenging task due to concerns over national security, criminal investigations and environment protections. Among various known detection methods, fluorescence sensors have gained special attention in recent time. The family of fluorescent sensors based on push-pull systems that incorporate nitrogen heterocycles as an electron-withdrawing group have a growing interest due to their high sensitivity, selectivity and easy tuning. The fluorescent sensors discussed in this review are classified and organized according to used azaheterocyclic scaffold, their functionality and their ability to detect of nitroaromatics by fluorescence quenching. |