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Общее количество найденных документов : 10
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1.
Инвентарный номер: нет.
   
   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 [Electronic resource] / O. N. Chupakhin, B. V. Rudakov, S. G. Alexeev, V. N. Charushin, V. A. Chertkov // Tetrahedron Letters. - 1990. - Vol. 31, N 52. - P7665-7668. - Bibliogr. : p. 7668 (14 ref.)
ББК 54
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

\\\\expert2\\nbo\\Tetrahedron Letters\\1990, v 31, p.7665.pdf
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2.
Инвентарный номер: нет.
   
   C 51

   
    Chemistry of O- and C-adducts derived from 1,4-diazinium salts: the use of tetrahydropyrazines in the synthesis of condensed systems [Electronic resource] / G. L. Rusinov, P. A. Slepukhin, V. N. Charushin, O. A. Dyachenko, O. N. Kazheva, A. N. Chekhlov, E. V. Verbitskiy, M. I. Kodess, O. N. Chupakhin // Mendeleev Communications. - 2006. - Vol. 16, № 1. - P26-29
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 1-Ethyl-2,3-dicyano-5-nitromethyl-6-methoxy-1,4,5,6-tetrahydropyrazine reacts with N-methylquinoxalinium iodide in the presence of triethylamine to form octahydro-2,4a,5,10-tetraazabenzo[b]fluorene-3,4-dicarbonitrile, while our attempts to obtain similar polycyclic products from stereoisomeric 5-(S)- and 5-(R)-(1`-nitroprop-1`-yl)-6-methoxy-1,4,5,6-tetrahydropyrazines derived from the reaction of 1-nitropropane with 2,3-dicyano-5,6-dimethoxy-1-ethyl-1,4,5,6-tetrahydropyrazine.

\\\\Expert2\\nbo\\Mendeleev Communications\\2006, v.1, p.26.pdf
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3.
Инвентарный номер: нет.
   
   A 53

   
    An Unusually easy oxidative dequaternization of N-alkyl-1,2,4-triazinium salts [Electronic resource] / O. N. Chupakhin, B. V. Rudakov, P. McDermott, S. G. Alexeev, V. N. Charushin, F. Hegarty // Mendeleev Communications. - 1995. - Vol. 5, № 3. - P104-105
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Unusually easy dequaternization has been found to occur on treatment of 1-alkyl-3-morpholino-5-phenyl-1,2,4-triazinium iodides with triethylamine in alcohol or acetone solutions at room temperature; a plausible reaction mechanism has been advanced on the basis of NMR and kinetic studies

\\\\expert2\\nbo\\Mendeleev Communications\\1995, v.5, N 3. p.104.pdf
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4.
Инвентарный номер: нет.
   
   I-69

   
    Intermolecular and intramolecular cycloaddition reactions of 1-ethyl-1,2,4-triazinium salts with alkynes [Electronic resource] / N. N. Mochul`skaya, A. A. Andreiko, V. N. Charushin, V. I. Solomonov // Mendeleev Communications. - 2001. - Vol. 11, № 1. - P19-20
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Azomethyne ylides generated from 3-alkylthio substituted 1-alkyl-5-aryl-1,2,4-triazinium salts 4a–c on treatment with triethylamine undergo 1,3-dipolar cycloaddition with dimethyl acetylenedicarboxylate to give pyrrolo[2,1-f] [1,2,4]triazines, while 1-ethyl-5- phenyl-1,2,4-triazinium salts 1a,b bearing the CC bond in the side-chain 3-alkynylthio substituent react with acetylenes to undergo either intermolecular 1,3-dipolar cycloaddition or intramolecular inverse electron demand Diels–Alder reactions????

\\\\expert2\\nbo\\Mendeleev Communications\\2001, v.11, N 1. p.19.pdf
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5.
Инвентарный номер: нет.
   
   F 70

   
    Fluorine-containing Heterocycles. X. Acetoacetamides in the Synthesis of Fluorine-containing Chromone [Electronic resource] / G. N. Lipunova, E. V. Nosova, M. I. Kodess, V. N. Charushin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2004. - Vol. 40, № 8. - P1162-1166
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Fluorine-containing chromone-3-carboxamides were synthesized by reaction of tetra(penta)fluoro-benzoyl chlorides with acetoacetamides in dichloromethane in the presence of triethylamine. Nucleophilic substitution of fluorine atoms by amine rests in compounds synthesized was investigated

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2004, 40 (8), 1162.pdf
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6.
Инвентарный номер: нет.
   
   F 70

   
    Fluorine-containing pyrido[1,2-a]quinazolin-6-ones [Electronic resource] / E. V. Nosova, G. N. Lipunova, M. I. Kodess, E. B. Vasil'eva, V. N. Charushin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2004. - Vol. 53, № 10. - P2314-2318
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of 2-aminopyridine and 2-amino-5-methylpyridine with 2,3,4,5-tetrafluorobenzoyl chloride afforded N,N’-diaroylpyridinium salts, which were converted into 6H-pyrido[1,2-a]quinazolin-6-ones by refluxing in toluene in the presence of triethylamine. The angular structure of the tricyclic derivatives obtained was confirmed by 19F and 13C NMR spectroscopy and 2D heteronuclear HetCOR and HMBC experiments

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2004, 53 (10), 2314.pdf
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7.
Инвентарный номер: нет.
   
   F 76

   
    Formation of polynuclear palladium complexes with the benzimidazole-2-thiolate anion [Electronic resource] / M. O. Talismanova, A. A. Sidorov, G. G. Aleksandrov, V. N. Charushin, S. K. Kotovskaya, I. L. Eremenko, I. I. Moiseeva // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2008. - Vol. 57, № 1. - P47-55
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The reactions of palladium(II) salts with 2-mercaptobenzimidazole (HL) and its 5,6-difluorinated derivative (HLF) were investigated. In the presence of hydrochloric acid, PdCl2 and K2PdCl4 react with HL and HLF in the ethanol—water and acetonitrile—water systems to form the mono-nuclear dicationic complexes [Pd(HL)4]Cl2 (1) and [Pd(LF)4]Cl2 (2). In the absence of HCl, the reactions afford the tetranuclear complex Pd4[(L)2(3-S,N-(L))2(S,N-(L))4] (3). The reaction of triethylamine with an ethanolic solution of 3 leads to degradation of 3 and the formation of the lantern-type dinuclear complex Pd2[2-(L)4] (4), in which the palladium atoms are in the nonequivalent coordination environment, PdN4 and PdS4. The reaction of K2PdCl4 with HL or HLF in the THF—water or acetonitrile—water systems (for the reaction with HLF) in the presence of Et3N produces the lantern-type dinuclear complexes Pd2[(?S,N-(L3))4] and Pd2[(S,N)(LF))4] (5), in which the metal atoms are in the equivalent coordination environment (cis-PdN2S2)

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2008, 57 (1), 47.pdf
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8.
Инвентарный номер: нет.
   
   U 62

   
    Unusual Expansion of the 1,2,4,5-Tetrazine Ring in [1,2,4]Triazolo[4,3-b]-[1,2,4,5]tetrazines Leading to [1,2,4,6]Tetrazepine Systems [Text] / I. N. Ganebnuikh, S. G. Tolshchina, R. I. Ishmetova, N. K. Ignatenko, P. A. Slepukhin, G. L. Rusinov, V. N. Charushin // European Journal of Organic Chemistry. - 2011. - № 12. - P2309-2318. - Bibliogr. : p. 2318 (22 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Expansion of the tetrazine ring has first been found to occur when [1,2,4]triazolo[4,3-b][1,2,4,5]tetrazines were allowed to react with CH-active compounds in acetonitrile in the presence of triethylamine to give the unexpected series of 8,9-dihydro-7H-[1,2,4]-triazolo[4,3-b][1,2,4,6] tetrazepine derivatives

\\\\Expert2\\nbo\\European Journal of Organic Chemistry\\2011, p.2309.pdf
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9.
Инвентарный номер: нет.
   
   A 10

   
    A convenient synthesis of new 5,11-dihydroindolo[3,2-b]carbazoles bearing thiophene, 2,2′-bithiophene or 2,2′:5′,2″-terthiophene units at C-2 and C-8 positions / R. A. Irgashev, N. A. Kazin, G. L. Rusinov, V. N. Charushin // Tetrahedron Letters. - 2017. - Vol. 58, № 32. - P3139-3142
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
5,11-DIHYDROINDOLO[3,2-B]CARBAZOLE -- THIOPHENE -- 3-CHLOROACRYLALDEHYDE -- THE VILSMEIER–HAACK FORMYLATION -- THE FIESSELMANN REACTION
Аннотация: A series of new 5,11-dihydroindolo[3,2-b]carbazole derivatives, containing functional thiophene, 2,2′-bithiophene or 2,2′:5′,2″-terthiophene moieties at both C-2 and C-8 positions of their fused scaffolds, have been obtained from 2,8-diacetyl-substituted 5,11-dihydroindolo[3,2-b]carbazole compounds through the effective strategy, which is based on the sequence of two reactions, namely the Vilsmeier–Haack formylation and the Fiesselmann thiophene synthesis. The starting acetyl substituted materials have been transformed into the corresponding 3-chlorocrylaldehyde-containing compounds by treatment with POCl3-DMF complex, followed by the reaction with alkyl thioglycolates or α-mercaptoacetone in the presence of triethylamine to afford 2-carboalkoxythiophene- or 2-acetylthiophene-linked derivatives. 2-Acetylthiophene derivatives have further been involved into the same sequence of reactions to obtain 2,2′-bithiophene-, and 2,2′:5′,2″-terthiophene-linked 5,11-dihydroindolo[3,2-b]carbazole compounds.

\\\\Expert2\\NBO\\Tetrahedron Letters\\2017 v.58 p.3139-3142.pdf
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10.
Инвентарный номер: нет.
   

   
    Abnormal push-pull benzo[4,5]imidazo[1,2-a][1,2,3]triazolo[4,5-e]pyrimidine fluorophores in planarized intramolecular charge transfer (PLICT) state: Synthesis, photophysical studies and theoretical calculations / O. S. Taniya, V. V. Fedotov, L. K. Sadieva [et al.] // Dyes and Pigments. - 2022. - Vol. 204. - Ст. 110405
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The combination of excellent luminescence with high solvent polarity effect and aggregation induced emission (AIE) is an ideal combination for creating fluorophores/probes with high microenvironmental sensitivity. However, many push-pull chromophores of the D−A type in common intramolecular charge transfer (ICT) state with a significant solvatochromic effect and AIE activity, have poor luminescent properties. Herein, to overcome this problem by using reactions of nucleophilic aromatic hydrogen substitution (SNH), we have designed a series of novel 4-heteroaryl-substituted 2-aryl-2H-benzo[4,5]imidazo[1,2-a][1,2,3]triazolo[4,5-e]pyrimidine fluorophores possessing a planarized intramolecular charge transfer (PLICT) state. All these fluorophores exhibited high luminescence quantum yields (up to 60%) and large Stokes shift values of up to 7459 cm−1. Among them, the fluorophore 4h was found to exhibit the most pronounced positive solvatochromic effect and the probe 4f exhibited the most pronounced aggregation induced emission characteristics. This AIE behavior was further confirmed by means of time-resolved fluorescence lifetime measurements as well as DFT-assisted geometry optimization studies. In the presence of trifluoroacetic acid (TFA) compound 4h exhibited a well-pronounced acidochromism via visible color change from yellow-green to orange which returned to the original yellow-green solution after the addition of triethylamine (TEA). The Stern-Volmer constant for the probe 4h towards TFA was 38 M−1. Finally, for the compounds 4f, g, h theoretical calculations in the ground and excited states in different solvents were carried out to confirm the PLICT process. Based on all above the herein reported PLICT fluorophores 4a-h can be successfully applied as biological probes and optical switches.

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