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 Найдено в других БД:Публикации Чарушина В.Н. (22)
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Общее количество найденных документов : 72
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1.
Инвентарный номер: нет.
   


   
    (Mechano)synthesis of azomethine- and terpyridine-linked diketopyrrolopyrrole-based polymers / W. K. A. Al-Ithawi, A. F. Khasanov, M. I. Valieva [et al.] // Chimica Techno Acta. - 2023. - Vol. 10, № 2. - P202310204
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
DIKETOPYRROLOPYRROLE-BASED POLYMERS -- PD-CATALYZED SYNTHESIS -- MECHANOSYNTHESIS
Аннотация: Three efficient synthetic approaches towards new azomethine- and terpyridine-containing 2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione (diketopyrrolopyrrole, DPP) based polymers, such as P1 and P2, are reported. The first approach involves the Pd-catalyzed synthesis via two- or three-component Suzuki or Stille cross-coupling reaction in solution. The second approach involves Pd-catalyzed Suzuki cross-coupling reaction under ballmilling conditions. And, finally, the third approach involves Pd-free condensation reaction under ball-milling conditions. The newly obtained polymers exhibited absorbance around 700 nm and emission around 900 nm, and, thus, these polymers are considered to be NIR-fluorophores.

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2.
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    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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3.
Инвентарный номер: нет.
   
   A 10


   
    A rational protocol for the synthesis of 1-(2-pyridyl)isoquinolines [Electronic resource] / D. S. Kopchuk, I. S. Kovalev, A. F. Khasanov, G. V. Zyryanov, P. A. Slepukhin, V. L. Rusinov, O. N. Chupakhin // Mendeleev Communications. - 2013. - Vol.23, №3. - С. 142-144. - Библиогр.: с. 144 (82 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
SYNTHESIS -- ISOQUINOLINES -- X-RAY DIFFRACTION
Аннотация: Aza-Diels-Alder reaction between 3-(2-pyridyl)-1,2,4-triazines and 1-morpholinocyclohexene followed by aromatization of the cyclohexene moiety affords 1-(2-pyridyl)isoquinolines. Crystal structures of two tetrahydroisoquinolines were confirmed by X-ray diffraction analysis

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4.
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    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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5.
Инвентарный номер: нет.
   
   A 81


   
    Aryne approach towards 2,3-difluoro-10-(1H-1,2,3-triazol-1-yl)pyrido[1,2-a]indoles / D. S. Kopchuk, I. L. Nikonov, G. V. Zyryanov, E. V. Nosova, I. S. Kovalev, P. A. Slepukhin, V. L. Rusinov, O. N. Chupakhin // Mendeleev Communications. - 2015. - Vol. 25. - С. 13-14
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
1H-1,2,3-TRIAZOL-1-YL -- INDOLES -- ARYNE

\\\\expert2\\NBO\\Mendeleev Communications\\2015, v.25, p. 13-14.pdf
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6.
Инвентарный номер: нет.
   
   A 81


   
    Aryne approach towards 2,3-difluoro-10-(1H-1,2,3-triazol-1-yl)pyrido[1,2-a]indoles [Electronic resource] / D. S. Kopchuk, I. L. Nikonov, G. V. Zyryanov, E. V. Nosova, I. S. Kovalev, P. A. Slepukhin, V. L. Rusinov, O. N. Chupakhin // Mendeleev Communications. - 2015. - Vol. 25, № 1. - С. 13-14. - Bibliogr. : p. 14 (21 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HYDROGEN-BONDS -- FLUORINE -- N-OXIDES
Аннотация: Reaction between 3-(2-pyridyl)-1,2,4-triazines and in situ generated 4,5-difluorobenzyne in toluene affords 2,3-difluoro-10-(1H-1,2,3-triazol-1-yl)pyrido[1,2-a]indoles. The structure of one representative compound was confirmed by X-ray diffraction analysis.

\\\\expert2\\nbo\\Mendeleev Communications\\2015, v.25, p. 13-14.pdf
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7.
Инвентарный номер: нет.
   
   A 81


   
    Aryne intermediates in the synthesis of polynuclear heterocyclic systems (Review) / I. S. Kovalev, D. S. Kopchuk, G. V. Zyryanov, P. A. Slepukhin, V. L. Rusinov, O. N. Chupakhin // Chemistry of Heterocyclic Compounds. - 2012. - Vol.48, №4. - С. 536-547
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ARYNE INTERMEDIATES -- DIENOPHILES -- DIELS-ALDER REACTIONS
Аннотация: Published examples of the polynuclear fused heterocyclic systems production by cycloaddition reactions involving aryne intermediates generated in situ are reviewed

\\\\Expert2\\nbo\\Chemistry of Heterocyclic Compounds\\2012, v.48, N 4, p.536-547.pdf
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8.
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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9.
Инвентарный номер: нет.
   


   
    Benzo[de]naphtho[1,8-gh]quinolines: synthesis, photophysical studies and nitro explosives detection / I. L. Nikonov, I. A. Khalymbadzha, L. K. Sadieva [et al.] // Chimica Techno Acta. - 2021. - Vol. 8, № 4. - Ст. 20218415
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
BENZO[DE]NAPHTHA [1,8-GH]QUINOLONES -- FLUORESCENCE -- SENSOR -- EXPLOSIVES
Аннотация: A rational synthetic approach to substituted naphtho[1,8-gh]quinolines based on intramolecular cyclization in the presence of potassium in the series of (naphthalen-1-yl)isoquinolines is described. The photophysical properties of the obtained compounds were studied; in particular, fluorescence emission was detected in the range 454-482 nm with a quantum yield of up to 54%. We also calculated the HOMO-LUMO energies and optimized molecular structures for the resulting fluorophores. Based on the results of fluorescence titration, the Stern-Volmer constants (up to 21587 M-1) and the detection limits of nitroanalytes (up to 1.4 ppm) were calculated, confirming the possibility of their use as potential chemosensors for the visual detection of nitro-containing explosives.

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10.
Инвентарный номер: нет.
   
   B 43


   
    Benzyne-mediated rearrangement of 3-(2-pyridyl)-1,2,4-triazines into 10-(1H-1,2,3-triazol-1-yl)pyrido[1,2-a]indoles [Electronic resource] / I. L. Nikonov, D. S. Kopchuk, I. S. Kovalev, G. V. Zyryanov, A. F. Khasanov, P. A. Slepukhin, V. L. Rusinov, O. N. Chupakhin // Tetrahedron Letters. - 2013. - Available online 20 September. - Bibliogr. : p. (20 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
1,2,4 TRIAZINES -- TRIAZOL -- INDOLES
Аннотация: The reaction between 5-R-6-R1-3-(2-pyridyl)-1,2,4-triazines and benzyne generated in situ in toluene under reflux results in the formation of 10-(1H-1,2,3-triazol-1-yl)pyrido[1,2-a]indoles 3 in up to 60% yields instead of the expected 3-R-4-R1-1-(2-pyridyl)isoquinolines 2. The crystal structure of product 3c and the proposed mechanism for the formation of 3 are reported

\\\\expert2\\nbo\\Tetrahedron Letters\\2013, v. 54, p. 6427.pdf
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