S 98 Synthesis of fluorinated furo- and pyrrolo[3,4-b]quinoxaline 4,9-dioxides [Electronic resource] / S. K. Kotovskaya, N. M. Perova, V. N. Charushin, O. N. Chupakhin // Mendeleev Communications. - 1999. - Vol. 9, N 2. - P76-77 Рубрики: ХИМИЧЕСКИЕ НАУКИ \\\\expert2\\nbo\\Mendeleev Communications\\1999, v.9, N 2. p.76.pdf |
O-57 One-step route to fluorinated furo[2,3-b]quinoxalines [Electronic resource] / V. N. Charushin, G. A. Mokrushina, G. M. Petrova, G. G. Alexandrov, O. N. Chupakhin, // Mendeleev Communications. - 1998. - Vol. 8, N 4. - P133-134 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The reaction of 6,7-difluoro-1-ethylquinoxalinium salts with 2,4-pentandione, ethyl and bornyl acetoacetates and other beta-ceto esters results in the formation of 6,7-difluoro-3a,4,9,9a-tetrahydrofuro[2,3-b]quinoxalines \\\\expert2\\nbo\\Mendeleev Communications\\1998, v.8, N 4. p.133.pdf |
S 43 Secondary structure of the M2 protein of type-A influenza-virus and its role in rimantadine and deytiforine resistanse [Text] / O. I. Kiselev, V. P. Mishin, V. I. Eroshkin, K. N. Kizeletskaya, E. V. Usova, V. I. Rudenko, O. N. Chupakhin // Molecular Biology. - 1994. - Vol. 28, N 5. - P650-653 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Studies on the molecular aspects of resistance of influenza virus A to drugs (rimantadine, deytiforine, amantadine) allow purposeful design of new compounds having a broad spectrum of antiviral activity and evoking no resistance |
T 82 Transformations of 5-diazo derivatives of 1,3-dimethyl-6-hydrazinouracil - new synthetic approaches to novel pyrimidine-derivatives [Electronic resource] / Y. A. Azev, O. L. Guselnikova, O. N. Chupakhin // Mendeleev Communications. - 1994. - N 6. - P208-209 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: 1,3-Dimethyl-6-hydrazinouracil 1 gives hydrazones 2 with the corresponding aldehydes. Heating of 6-hydrazinouracil 1 in ethanol in the presence of hyrochloric acid results in the formation of N1, N2-bis(1,3-dimethyl-2,6-dioxopyrimid-4-yl)hydrazine 3, which gives the diazo derivative 4 on treatment with 2,4-diazido-6-cyanomethoxy-s-triazine in DMSO in the presence of triethylamine et room temperature |
R 30 Reaction of 6-nitro-1.2.4-triazolo[1.5-a]pyrimidines with benzylamine - an unusual synthesis of 1-hydroxymidazoles [Electronic resource] / V. L. Rusinov, M. N. Kushnir, O. N. Chupakhin, G. G. Alexandrov // Mendeleev Communications. - 1993. - N 5. - P213-214 . - ISSN 0959-9436 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Heating of 5-methyl-6-nitro-7-p-N,N-dimethylaminophenyl)-1,2,4-triazolo[1,5-a]pyrimidines with benzylamine in ethanol or DMF leads to 1-hyroxy-2-phenyl-4-methyl-5-benylimino(p-N,N-dimethylaminophenyl)methylidinomidazole |
T 82 Transformation of azido derivatives of s-triazine into 1,2,4-triazolylaminotetrazoles [Electronic resource] / Y. A. Azev, I. P. Loginova, O. L. Guselnikova, S. V. Shorshnev, N. A. Klyuev, V. L. Rusinov, O. N. Chupakhin // Mendeleev Communications. - 1993. - N 2. - P49-50 . - ISSN 0959-9436 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: On heating 6-amino and 6-alkoxyderivatives of 2,4-diazido-s-triazine 1a-c with hydrazine or phenylhydrazine in ethanol the corresonding triazolylaminotetrazoles 2a-d are produced |
R 30 Reactions of N-aminoquinolones with ketones - a new approach to the synthesis of tricyclic 6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxilic acids [Electronic resource] / O. N. Chupakhin, Y. A. Azev, S. G. Alexeev, S. V. Shorshnev, E. Tsoi, V. N. Charushin // Mendeleev Communications. - 1992. - Vol. 2, N 4. - P151-153 . - ISSN 0959-9436 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Reactions of 7-(X)-substituted ethyl 1-amino-4-oxo-1,4-dihydroquinoline-3-carboxilates (1a-c; X=F, Cl and 4-methylpiperazin-1-yl) with mono- and di-ketones have been studied. Treatment of 1a; X=F with cyclohexanone and cyclopentanone in acetic acid resulted in the corresponding azomethynes \\\\expert2\\nbo\\Mendeleev Communications\\1992, v.2, N 4. p.151.pdf |
О-42 1-Alkyl-1,2,4-triazinium ylides as 1,3-dipoles in a cycloaddition reaction with diethyl acetylenedicarboxylate [Electronic resource] / O. N. Chupakhin, B. V. Rudakov, S. G. Alexeev, S. V. Shorshnev, V. N. Charushin // Mendeleev Communications. - 1992. - N 3. - P85-86 . - ISSN 0959-9436 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 1-АЛКИЛ-1.2.4-ТРИАЗИНИЛИДЫ -- ИЛИДЫ -- ДИПОЛИ -- 1.3-ДИПОЛИ -- ЦИКЛОПРИСОЕДИНЕНИЕ -- ДИЭТИЛАЦЕТИЛЕНДИКАРБОКСИЛАТ -- ДЕПРОТОНАЦИЯ -- 1-АЛКИЛ-5-ФЕНИЛ-1.2.4-ТРИАЗИНА СОЛИ -- триэтиламины -- АЗОМЕТИНИЛИДЫ -- ЦИКЛОПРИСОЕДИНЕНИЕ ДИПОЛЯРНОЕ -- ДИПОЛЯРНОЕ ЦИКЛОПРИСОЕДИНЕНИЕ -- ПИРРОЛО[2.1-F]1.2.4-ТРИАЗИНЫ -- СОЛИ -- ОРГАНИЧЕСКАЯ ХИМИЯ -- ХИМИЯ ОРГАНИЧЕСКАЯ Аннотация: Deprotonation of 1-alkyl-5-phenyl-1,2,4-triazinium salts by triathylamine results in the formation of azomethyne ylides which undergo a 1,3-dipolar cycloaddition reaction with diethyl acetylenedicarboxylate to yield pyrrolo[2,1-f]1,2,4-triazines |
E 84 Ethyl cyanoacetate as 1,3-bifunctional reagent in the pyrimidine to pyridine ring transformations [Text] / O. N. Chupakhin, V. L. Rusinov, A. A. Tumashov, E. O. Sidorov, I. V. Karpin // Tetrahedron Letters. - 1992. - Vol. 33, N 25. - P3695-3696 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: By using of the double-labelled C(*)H(*)-CH2-COOEt compound it has been proved that transformation of 6-nitro-1,2,4-triazolo[1,5-a]pyrimidine into 2-triazolylamino-3-carbethoxy-5-nitropyridine proceeds with incorporation of the C-C-N fragment of ethyl cyanoacetate into the pyridine ring |
U 62 Unusual dimerization of 1-ethyl-1,2,4-triazinium salts into 4a,4b,9,10-tetrahydro-1,3,6,8,8a,10a-hexaazaphenanthrenes [Text] / O. N. Chupakhin, B. V. Rudakov, S. G. Alexeev, V. N. Charushin, V. A. Chertkov // Tetrahedron Letters. - 1990. - Vol. 31, N 52. - P7665-7668 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: 1-Ethyl-3-alkylthio-5-phenyl-1,2,4-triazinium tetrafluoroborates were found to undergo an unusual dimerization on treatment with triethylamine in methanol or ethanol solution. A mechanism for the formation of 4a,4b,9,10-tetrahydro-1,3,5,8,8a,10a-hexaaza-phenanthrenes is proposed |
A 10 Eine einstufige Synthese von Azolo-anellierten Derivaten des Pyrido[2,3-d]pyrimidins [Electronic resource] / O. N. Chupakhin, V. L. Rusinov, T. L. Pilicheva, A. A. Tumashov // Synthesis. - 1990. - N 8. - P713-717 Рубрики: ХИМИЧЕСКИЕ НАУКИ \\\\expert2\\nbo\\Synthesis\\1990, p.713.pdf |
A 10 A route to fluorocontaining 1,3-thiazolines via internal polyfluorooxiranes [Electronic resource] / L. V. Saloutina, A. Ya. Zapevalov, M. I. Kodess, V. I. Saloutin, O. N. Chupakhin // Mendeleev Communications. - 1999. - N 6. - P231-232 . - ISSN 0959-9436 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The reaction of internal fluoroolefin oxides with thiourea results in 2-amino-5-fluoro-4-hydroxy-4,5-di(polyfluoroalkyl)-1,3-thiazolines, providing a route to an unknown type of fluorine-containing thiazolines with two fluoroalkyl substituents |
N 89 Novel fluorinated chromones [Text] / V. I. Saloutin, Z. E. Skryabina, I. T. Bazyl, O. N. Chupakhin // Journal of Fluorine Chemistry. - 1993. - Vol. 65, N 1-2. - P37-41 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The self-condensation of ethyl pentafluorobenzoylacetate leads to the formation of 3-pentafluorophenyl-1H-sopyrono[2,3-b]-6,7,8,9-tetrafluorochrom in 37% yeld. On hydrolysis, this gave 2-pentafluorobenzoylmethyl-5,6,7,8-tetrafluorochromone |
A 10 A new approach to the synthesis of fluorinated chromones [Electronic resource] / V. I. Saloutin, I. T. Bazyl, Z. E. Skryabina, V. M. Krokhalev, O. N. Chupakhin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1992. - Vol. 41, N 9. - P1714-1715 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The condensation of two molecules of ethyl pentafluorobenzoylacetate gives 1-oxo-3-penta fluorophenyl-1H-pyrano[4,3-b]6,7,8,9-tetrafluorochrome \\\\Expert2\\nbo\\Russian Chemical Bulletin\\1992, 41 (9), 1714.pdf |
N 89 Novel 1-trifluoromethyl substituted 1,2-ethylenediamines and their use for the synthesis of fluoroquinolones [Text] / A. Y. Aizikovich, M. V. Nikonov, M. I. Kodess, V. Yu. Korotaev, V. N. Charushin, O. N. Chupakhin // Tetrahedron. - 2000. - Vol. 56, N 13. - P1923-1927 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A common approach to the synthesis of 1-trifluoromethyl-1,2-ethylenediamines was deweloped. Based on these original building blocks the new derivatives of N-substituted fluoroquinolones bearing the trifluoromethyl group were obtined |
T 44 The Ritter reaction in the 5-cyano-1,2,4-triazine series [Electronic resource] / D. N. Kozhevnikov, T. V. Nikitina, V. L. Rusinov, O. N. Chupakhin // Mendeleev Communications. - 2000. - Vol. 10, N 3. - P117-118 . - ISSN 0959-9436 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
H 99 Interaction of 5-methoxy-1,2,4-triazines with ureas as a new route to 6-azapurines [Electronic resource] / D. G. Beresnev, G. L. Rusinov, O. N. Chupakhin, H. Neunhoeffer // Mendeleev Communications. - 2000. - Vol. 10, N 2. - P58-59 . - ISSN 0959-9436 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
C 91 Crystalline hydrogen-bonded adducts of dimethyl sulphoxide and 7-hydroxypolyfluoroquinolones (chromones [Text] / V. I. Saloutin, I. T. Bazyl, Z. E. Skryabina, G. G. Alexandrov, O. N. Chupakhin // Journal of Fluorine Chemistry. - 1995. - V. 74. - P15-19 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A stable crystalline hydrogen-bonded adduct of dimethyl sulphoxide (DMSO) and 7-hydroxy-5,6,8-trifluoro-2-carboxychromone has been prepared by the reaction of 2-carboxy-5,6,7,8-tetrafluorochromone with KOH/glycerol in DMSO. It has been found that pentafluorophenol and also 1-cyclohexyl-7-hydroxy-5,6,8-trifluoro-4(1H)-4-oxoquinoline-2-carboxylic acid form the corresponding crystalline hydrogen-bonded adducts with DMSO. The structure of the latter has been established from an X-ray crystallographic study |
S 98 Synthesis of Heterocycles Via Internal Polyfluorooxiranes [Text] : доклад, тезисы доклада / L. V. Saloutina, A. Ya. Zapevalov, M. I. Kodess, V. I. Saloutin, O. N. Chupakhin // International Memorial I.Postovsky Conference on Organic Chemisty, Ekaterinburg, March 17-20, 1998 : program and abstracts. - Ekaterinburg, 1998. - P117 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
H 99 Ipso-Substitution of an acyl group in reactions of 3-acyl-substituted ethyl 7,8-difluoro-5-oxoelectrophilic reagents [Electronic resource] / Y. A. Azev, S. V. Shorshnev, S. G. Alexeev, V. N. Charushin, O. N. Chupakhin // Mendeleev Communications. - 1993. - N 3. - P99-100 . - ISSN 0959-9436 Рубрики: ХИМИЧЕСКИЕ НАУКИ \\\\expert2\\nbo\\Mendeleev Communications\\1993, v.3, N 3. p.99.pdf |