Г 67 Горбунова, Т. И. Реакция 1.1.2.3.3-пентафтор-1.5-гексадиена с метанолом в присутствии основания [] = Reaction of 1,1,2,3,3-pentafluoro-1,5-hexadiene with methanol in the presence of a base / Т. И. Горбунова, А. Я. Запевалов, В. И. Салоутин // Изв. АН. Сер. Химическая. - 1994. - Vol. 43, № 4. - С. 758-759 . - ISSN 0002-3353 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 1.1.2.3.3-ПЕНТАФТОР-1.5-ГЕКСАДИЕН -- метанолы -- ОСНОВАНИЯ (ХИМИЯ) -- ОРГАНИЧЕСКАЯ ХИМИЯ -- ХИМИЯ ОРГАНИЧЕСКАЯ |
K 66 Kodess, M. I. Reactions of 3-(polyfluoroacyl)chromones with hydroxylamine : synthesis of novel R - containing isoxazole and chromone derivatives [Electronic resource] / M. I. Kodess, V. Ya. Sosnovskikh, V. S. Moshkin // Tetrahedron. - 2008. - Vol. 64, № 34. - P7877-7889 : рис. - Библиогр. : с. 7888-7889 (32 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Reaction of 3-(polyfluoroacyl)chromones with hydroxylamine free base proceeds via nucleophilic 1,4-addition followed by opening of the pyrone ring and subsequent cyclization to 4-(polyfluoroalkyl)-4H-chromeno[3,4-d]isoxazol-4-ols in good yields. On treatment with trifluoroacetic acid, the isoxazole ring of this annulated heterocyclic system opens to give 3-cyano-2-(polyfluoroalkyl)chromones, which were successfully hydrolyzed with concentrated H2SO4 to afford 3-carbamoyl-2-(polyfluoroalkyl)chromones. On the other hand, oximation of 3-(polyfluoroacyl)chromones with hydroxylamine hydrochloride occurs either at the carbonyl carbon atom connected to the RF group or at the C-2 atom to give 3-RFC(NOH)-chromones and 5-RF-4-salicyloylisoxazole oximes, respectively. The former were easily converted to 3-RF-4-salicyloylisoxazoles by simple heating in dimethyl sulfoxide.?? \\\\Expert2\\nbo\\Tetrahedron\\2008, v. 64, N34, p. 7877.pdf |
O-97 Oxidation of -cysteine in oxygen-saturated aqueous solution in the presence of Cu(II)-containing adjusted polymers [Text] / S. Y. Men'shikov, A. V. Vurasko, L. S. Molochnikov, E. G. Kovaleva, A. A. Efendiev // Journal of Molecular Catalysis A: Chemical. - 2000. - Т. 158, № 1. - P447-451 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The influence of synthesis conditions of adjusted sorbents based on polyethylenepolyamine on catalytic properties of their Cu(II)-containing samples has been studied. It was shown that adjustment of sorbents leads to a significant increase in activity of Cu(II)-containing catalysts on their base. |
U 52 Unexpected synthesis of 3,5-diethoxycarbonyl-2-pentafluorophenyl-4-phenyl-7,8,9,10-tetrafluoro-4,5-dihydrobenzo[b]oxacin-6-one [Electronic resource] / Ya. V. Burgart, M. V. Pryadeina, O. G. Kuzueva, M. I. Kodess, V. I. Saloutin, O. N. Chupakhin // Mendeleev Communications. - 2001. - Vol. 11, № 3. - P119-120 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The reaction of ethyl pentafluorobenzoylacetate with benzaldehyde in the presence of a base affords 3,5-diethoxycarbonyl-2-pentafluorophenyl-4-phenyl-7,8,9,10-tetrafluoro-4,5-dihydrobenzo[b]oxacin-6-one in contrast to fluoroalkyl-containing 3-oxo esters yielding 3,5-dialkoxycarbonyl-2,6-dihydroxy-2,6-difluoroalkyl-4-phenyltetrahydropyranes under the same conditions???? |
С 81 Стоматологические материалы на базе хитозана и карбоксиэтилхитозана [] = Stomatologic materials to base chitosan and carboxyethylchitosan : доклад, тезисы доклада / А. В. Пестов, Ю. А. Бондарь, Т. Д. Мирсаев, Ю. А. Скорик, Ю. Г. Ятлук // Современные перспективы в исследовании хитина и хитозана : материалы VIII Международной конф., Казань, 12-17 июня 2006 г. : докл. - Казань, 2006. - С. 233-235. - Библиогр.: с. 235 (6 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ |
К 44 Кислотно-основные и коллоидные свойства N-(2-карбоксиэтил)хитозанов [] = Acid-base and colloid properties of N-(2-carboxyetil)chitosans : доклад, тезисы доклада / С. Ю. Братская, А. В. Пестов, А. П. Голиков, Ю. Г. Ятлук, В. А. Авраменко // Современные перспективы в исследовании хитина и хитозана : материалы IX Международной конф., Ставрополь, 13-17 окт. 2008 г. : докл. - Ставрополь, 2008. - С. 49-52. - Библиогр.: с. 52 (7 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ |
P 93 Protolytic Equilibria of Some N,N-Bis(2-carboxyethyl)aminoazobenzenesulfonic Acids in Aqueous Solution [Electronic resource] / Yu. A. Skorik, L. K. Neudachina, A. V. Osintsev, Yu. G. Yatluk, A. A. Vshivkov, E. V. Osintseva // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2002. - Vol. 38, № 3. - P385-389 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: 4-[4-Bis(2-carboxyethyl)aminophenylazo]benzenesulfonic acid and 4-[2-bis(2-carboxyethyl)amino-4,5-dimethylphenylazo]benzenesulfonic acid were synthesized for the first time by azo coupling of diazosulfanilic acid with N,N-bis(2-carboxyethyl)aniline and N,N-bis(2-carboxyethyl)-3,4-xylidine, respectively. The acid ionization constants of the products were determined, their electron absorption spectra were measured, and schemes of acid-base equilibria in aqueous solution were proposed \\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2002, 38 (3), 385.pdf |
S 95 Suvorova, A. L. Polysaccharide derivatives as base for hybride membranes [Text] : реферат / A. L. Suvorova, I. S. Tyukova, A. L. Suvorov // ACHEMA 2009. 29-th International Exhibition-Congress on Chemical Engineering, Environmental Protection and Biotechnology, Frankfurt am Main, 11-15 May 2009. : book of abstr. . - Frankfurt am Main, 2009. - P45
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O-57 One-pot synthesis of 6H-pyrrolo[2,3-e[1,2,4]triazolo[1,5-a]pyrimidines on the basis of delta H-adducts of 6-Nitro[1,2,4]triazolo[1,5-a]pyrimidine with carbonyl compounds [Electronic resource] / E. B. Gorbunov, G. L. Rusinov, R. I. Ishmetova, V. N. Charushin, O. N. Chupakhin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2008. - Vol. 44, № 1. - P128-132 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Aromatic, heteroaromatic, and aliphatic carbonyl compounds reacted with 6-nitro[1,2,4]triazolo[1,5-a]pyrimidine in the presence of a base to give stable ?H-adducts at C7. Reduction of the nitro group in the latter is accompanied by tandem autoaromatization of the azine ring and intramolecular cyclocondensation with formation of the corresponding 6H-pyrrolo[2,3-e][1,2,4]triazolo[1,5-a]pyrimidines \\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2008, 44 (1), 128.pdf |
K 46 Kinetic resolution of heterocyclic amines by reaction with optically active acid chlorides. The effect of reaction conditions on the diastereoselectivity of acylation of (±)-3-methyl-2,3-dihydro-4H-1,4-benzoxazine [Electronic resource] / V. P. Krasnov, G. L. Levit, M. A. Koroleva, I. M. Bukrina, L. Sh. Sadretdinova, I. N. Andreeva, V. N. Charushin, O. N. Chupakhin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2004. - Vol. 53, № 6. - P1253-1256 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The influence of the reaction conditions (solvent, base) on the diastereoselectivity of acylation of (±)-3-methyl-2,3-dihydro-4H-1,4-benzoxazine with (S)-naproxen and N-tosyl-(S)-proline chlorides was studied. The highest diastereoselectivity was observed for the reaction carried out in benzene in the presence of aliphatic tertiary amines \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2004, 53 (6), 1253.pdf |
G 65 Gorbunova, T. I. Reaction of 1,1,2,3,3-pentafluoro-1,5-hexadiene with methanol in the presence of a base [Electronic resource] / T. I. Gorbunova, A. Ya. Zapevalov, V. I. Saloutin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1994. - Vol. 43, № 4. - P711-712 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The reaction of 1,1,2,3,3-pentafluoro-1,5-hexadiene (1) with MeOH in the presence of MeONa results in products of substitution, rearrangement, hydro-, or dehydrofluorination, depending on the reaction conditions \\\\Expert2\\nbo\\Russian Chemical Bulletin\\1994, 43 (4), 711.pdf |
R 44 Replacement of dimethylpyrazolyl group in 1,2,4,5-tetrazines by aliphatic alcohols and water [Electronic resource] / R. I. Ishmetova, N. I. Latosh, I. N. Ganebnuikh, N. K. Ignatenko, S. G. Tolshchina, G. L. Rusinov // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2009. - Vol. 45, № 7. - P1102-1107 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Reactions of 3,6-bis(4-R-3,5-dimethyl-1H-pyrazol-1-yl)-1,2,4,5-tetrazines and 3-amino-6-(3,5-dimethyl-1H-pyrazol-1-yl)-1,2,4,5-tetrazines with aliphatic alcohols and water in the presence of a base involved replacement of the dimethylpyrazolyl group and resulted in the formation of mono- and dialkoxy-1,2,4,5-tetrazines and 6-substituted 3-hydroxy-1,2,4,5-tetrazines. Dissociation constants of the latter were determined by potentiometric titration. \\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2009, 45 (7), 1102.pdf |
N 91 Nucleophilic substitution of hydrogen in the reaction of 1,2,4-triazin-4-oxides with cyanamide [Electronic resource] / V. N. Kozhevnikov, A. M. Prokhorov, D. N. Kozhevnikov, V. L. Rusinov, O. N. Chupakhin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2000. - Vol. 49, № 6. - P1122-1124 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: It was shown that cyanamide can successfully be used in reactions of nucleophilic substitution of hydrogen with 1,2,4-triazin-4-oxides in the presence of a base to give 5-cyanoimino-1,2,4-triazines. It was found by13C NMR spectroscopy that these compounds and their alkylation products at the cyclic nitrogen atom exist in the form of 5-cyanoimino-2,5-dihydro-1,2,4-triazines \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2000, 49 (6), 1122.pdf |
P 80 Polymers Based on Epoxy Resins and Functional Derivatives of Polychlorobiphenyls [Electronic resource] / N. Yu. Ostanina, L. D. Dultseva, A. L. Suvorov, O. N. Chupakhin // Russian Journal of Applied Chemistry. - 2002. - Vol. 75, № 5. - P814-817 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A new way to utilize polychlorobiphenyls was suggested: transformation of Sovol base hydrolysis products into glycidyl ethers and titanates. The resulting products were tested as components of epoxy compounds which are subsequently cured to obtain three-dimensional polymer networks \\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2002, v. 75, N. 5, p.814.pdf |
A 18 Acid-base properties and prototropic tautomerism of isomeric 1,2,4-triazin-3- and -5-ones [Electronic resource] / I. V. Khabibulina, R. E. Trifonov, A.P. Volovodenko, M. S. Eremenkova, O. N. Chupakhin, V. L. Rusinov, G. V. Zyryanov, V. A. Ostrovskii // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2004. - Vol. 40, № 3. - P426-430. - Bibliogr. : p. 430 (40 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ACID -- BASE -- TRIAZINE DERIVATIVE -- AQUEOUS SOLUTION Аннотация: The acidity and basicity constants of isomeric phenyl(aryl)-1,2,4-triazin- 3- and -5-ones in aqueous solution were determined by spectrophotometry: pK a = 7.3-6.2; pKBH+ = 0.1 to -2.2. 1,2,4-Triazin-3-ones are weaker bases than the corresponding 1,2,4-triazin-5-ones. According to the AM1 calculations, the most thermodynamically favorable tautomer in the gas phase is the oxo form: namely, 2H-tautomers of the neutral bases and 2,4-H,H +-tautomers of the conjugate acids. \\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2004, 40 (3), 426.pdf |
O-84 Osintseva, E. V. Protolytic properties and complexation with copper(II) ions of some azo derivatives of beta-arylaminopropionic acids [Electronic resource] / E. V. Osintseva, L. K. Neudachina, Yu. G. Yatluk // Russian Journal of Inorganic Chemistry (Zhurnal Neorganicheskoi Khimii). - 2010. - Vol. 55, № 10. - P1644-1650 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The azo coupling reaction of N-(2-carboxyethyl)anthranilic acid and N,N,N,N-tetrabis(2-carboxyethyl)-1,3-phenylenediamine with diazosulfanilic acid yielded the complexones sodium 4-N-(2-carboxyethyl)amino-5-carboxyazobenzene-4?-sulfonate (I) and 2,4-N,N,N,N-tetrabis(2-carboxyethyl)diaminoazobenzene-4?-sulfonic acid (II), respectively. The acidity constants of I and II (20°C = 0.1M KCl) were determined to be as follows: for I, pK 00 = 1.29 ± 0.13, pK 0 = 2.92 ± 0.07, pK 1 = 3.92 ± 0.05, pK 2 = 5.16 ± 0.03; for II, pK 00 = 2.35 ± 0.06, pK 0 = 2.81 ± 0.09, pK 1 = 3.21 ± 0.11, pK 2 = 3.81 ± 0.09, pK 3 = 4.34 ± 0.04, pK 4 = 5.03 ± 0.06, pK 5 = 6.67 ± 0.07. The electronic absorption spectra of I and II were measured, and acid-base equilibrium scheme for I and II in aqueous solutions were suggested. The complexation constants of I and II with copper(II) ions were determined to be logK CuQI= 5.47 ± 0.06 and logK CuQII= 5.72 ± 0.13 (20°C = 0.1 M KCl). ?? \\\\Expert2\\nbo\\Russian Journal of Inorganic Chemistry\\2010, v. 55, N 10, с.1644.pdf |
N 76 Non-Natural Nucleosides Based on 1,2,4-Triazolo[1,5-a]pyrimidin-7-ones [Text] / O. N. Chupakhin, T. S. Shestakova, L. E. Deev, O. S. Eltsov, V. L. Rusinov // Heterocycles. - 2010. - Vol. 80, № 2. - P1149-1163 : рис., табл. Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Two methods for synthesis of new nucleosides bearing 6-phenyl-1,2,4-triazolo[1,5-a]pyrimidin-7-ones as a base have been developed. The first one includes Vorbruggen glycosylation reaction. The second method, which is effective for synthesis of acyclic nucleosides, is based on the condensation between sodium salts of 6-phenyl-1,2,4-triazolo [1,5-a]pyrimidin-7-ones and 4-bromobuthyl acetate or (Z)-4-bromobut-2-en-1-yl acetate ?? |
P 17 Palladium and platinum sorption on a thiocarbamoyl-derivative of chitosan [Text] / A. Butewicz, K. Campos Galivan, A. V. Pestov, Yu. G. Yatluk, A. W. Trochimczuk, E. Guibal // Journal of Applied Polymer Science . - 2010. - Vol. 116, № 6. - P3318-3330 : рис. Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Immobilizing thiourea onto chitosan allowed using the polymer for the recovery of platinum groups metals (PGMs) in acidic solutions (up to 1–2M HCl concentrations). At low HCl concentration protonated amine groups may sorb chloroanionic metal species (electrostatic attraction mechanism); however, most of sorption proceeds through chelation on sulfur containing groups (less sensitive to acidic conditions). The bi-site Langmuir equation was used for fitting sorption isotherms. The sorption of PGMs was weakly affected by the composition of the solution (presence of high concentration of anions and base metals). Maximum sorption capacities for Pd(II) and Pt(IV) ranged between 274 and 330 mg g?1 in 0.25M HCl solutions and decreased to 150–198 mg g?1 in 2M HCl solutions: Pd(II) sorption was systematically higher than Pt(IV) sorption. The pseudo-second rate equation was used for modeling the uptake kinetics. Agitation speed hardly affected uptake kinetics indicating that external diffusion resistance is not the rate controlling step. Desorption yield higher than 85% were obtained using thiourea in 0.1M HCl solution. The adsorbents could be reused for at least three cycles |
O-72 Organosilicontitanium glycerohydrogels are the new base of topical phermaceutical composition [Text] : доклад, тезисы доклада / T. G. Khonina, L. P. Larionov, T. G. Boyakovskaya, E. V. Shadrina, A. L. Suvorov // Fundamental pharmacology and pharmacy-clinical practice, Perm, 25-27 September 2006 : materials of 2-nd Russian-Chinese International scientific conference of pharnacology. - Perm, 2006. - P171-172 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): HYDROGELS -- GLYCEROHYDROGELS -- PHARMACEUTICAL COMPOSITION -- OINTMENTS -- MEDICAMENTS |
B 83 Boyakovskaya, T. G. Siliconorganic glicerohydrogels as a new base for creation of medical and curative-cosmetic ointments [Text] : доклад, тезисы доклада / T. G. Boyakovskaya, L. P. Larionov, T. G. Honina // International conference of pharmacology, Harbin, 1-4 July 2005. - Harbin, 2005. - P50-51 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): HYDROGELS -- GLICEROHYDROGELS -- SILICONORGANIC GLICEROHYDROGELS -- OINTMENTS -- MEDICAL OINTMENTS -- CURATIVE-COSMETIC OINTMENTS |