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1.
Инвентарный номер: нет.
   


   
    Синтез 5-метил-1,2,4-триазоло[1,5-a]пиримидин- 7(4H)-она в сверхкритическом диоксиде углерода / А. В. Баклыков, Г. Л. Русинов, В. Л. Русинов, В. Н. Чарушин, Д. С. Копчук, Г. В. Зырянов, Г. А. Артемьев // Журнал общей химии. - 2019. - Т. 89, № 1. - С. 138-140
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
5-МЕТИЛ-1,2,4-ТРИАЗОЛО[1, 5-A]ПИРИМИДИН-7(4H)-ОН -- СУПЕРКРИТИЧЕСКИЙ CO2 -- СИНТЕЗ В ОТСУТСТВИЕ РАСТВОРИТЕЛЯ -- 5-METHYL-1,2,4-TRIAZOLO[1, 5-A]PYRIMIDINE-7(4H)-ONE -- SUPERCRITICAL CO2 -- SOLVENT-FREE SYNTHESIS
Аннотация: 5-Метил-1,2,4-триазоло[1,5- a ]пиримидин-7(4 H )-он - полупродукт в синтезе антивирусного препарата Триазид® - был впервые получен в сверхкритическом CO2 (200 бар) в отсутствие растворителей путем циклоконденсации 5-амино-3- Н -1,2,4-триазола с ацетоуксусным эфиром в присутствии каталитических количеств ZnCl2 с конверсией 90% в зависимости от температуры и времени реакции.

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2.
Инвентарный номер: нет.
   


    Кабак, А. С.
    Применение каменноугольного пека для утилизации термореактивных полимеров и изделий на их основе / А. С. Кабак, Е. И. Андрейков // Углехимия и экология Кузбасса: VII Международный Российско-Казахстанский симпозиум: сборник тезисов докладов. - Кемерово, 2018. - С. 43
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The coal tar pitch can be used as active solvent in the thermal solvolysis of thermosets and products based on thermosets, including polymer-matrix composites. The properties of the recovered fillers are determined.

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3.
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    Transformations of 4,5-bis(trifluoromethyl)imidazolidin-2-one and its N-substituted analogous in reactions with N,N-dinucleophiles / L. V. Saloutina, A. Y. Zapevalov, M. I. Kodess [et al.] // AIP conference proceedings. - 2022. - Vol. 2390. - Ст. 020069
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CHEMICAL COMPOUNDS
Аннотация: 4,5-Dihydroxy-4,5-bis(trifluoromethyl)imidazolidin-2-one and its N-methyl(phenyl)-substituted analogous were synthesized by the reaction of perfluorobiacetyl with urea and methyl(phenyl)urea. Depending on a solvent nature and character of the substituent at N-atom of the imidazolidine, different trifluoromethyl-containing heterocycles were obtained in reactions of the imidazolidin-2-ones with thiosemicarbazide and guanidine carbonate: imidazothiazol, 1,2,4-triazines, and hydantoins.

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4.
Инвентарный номер: нет.
   
   T 19


   
    Tandem Knoevenagel Condensation and Intramolecular Cycloaddition Reactions of 2-Azidobenzaldehydes with 2-Cyanoacetamides in the Synthesis of 4-Thiocarbamoyltetrazolo-[1,5-a]Quinolines = Тандем реакций конденсации по Кнёвенагелю и внутримолекулярного циклоприсоединения 2-азидобензальдегидов с 2-цианотиоацетамидами в синтезе 4-тиокарбамоилтетразоло[1,5-a]хинолинов / V. O. Filimonov, V. T. Abaev, T. Beryozkina, K. A. Galata, P. A. Slepukhin, M. A. Kostenko, V. S. Berseneva // Chemistry of Heterocyclic Compounds. - 2016. - Vol. 52, № 9. - С. 721-726. - Bibliogr. : p. 726 (32 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
2-AZIDOBENZALDEHYDES -- TETRAZOLO[1,5-A]QUINOLINE -- CYANOACETIC ACID THIOAMIDES
Аннотация: The reaction of 2-azidobenzaldehydes with 2-thioamides of cyanoacetic acid proceeds without a solvent and base at 80–90°C selectively by one of the possible routes to form tetrazolo[1,5-a]quinolines. The proposed mechanism of the reaction involves the Knoevenagel condensation and subsequent intramolecular [3+2] cycloaddition of the azide group at the C≡N bond of an intermediate acrylonitrile.

\\\\expert2\\NBO\\Chemistry of Heterocyclic Compounds\\2016, v.52, N 9, p. 721-726.pdf
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5.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis, Photophysical and Redox Properties of the D-pi-A Type Pyrimidine Dyes Bearing the 9-Phenyl-9H-Carbazole Moiety [Electronic resource] / E. V. Verbitskiy [и др.] // Journal of Fluorescence. - 2015. - Vol. 25, № 3. - С. 763-775. - Bibliogr. : p. 774-775 (51 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
PYRIMIDINES -- CARBAZOLE -- DYE-SENSITIZED SOLAR CELLS
Аннотация: Novel donor-pi-acceptor dyes bearing the pyrimidine unit as an electron-withdrawing group have been synthesized by using combination of two processes, based on the microwave-assisted Suzuki cross-coupling reaction and nucleophilic aromatic substitution of hydrogen. Spectral properties of the obtained dyes in six aprotic solvents of various polarities have been studied by ultraviolet-visible and fluorescence spectroscopy. In contrast to the absorption spectra, fluorescence emission spectra displayed a strong dependence from their solvent polarities. The nature of the observed long wavelength maxima has been elucidated by means of quantum chemical calculations. The electrochemical properties of these dyes have been investigated by using cyclic voltammetry, while their photovoltaic performance was evaluated by a device fabrication study. The experimental and calculation data show that all of the dyes can be regarded as potentially good photosensitizers for dye-sensitized solar cells.

\\\\expert2\\nbo\\Journal of Fluorescence\\2015, v.25, p.763-775.pdf
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6.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis, photochemical and luminescent properties of (E)-2-(2-hydroxyarylethylene)-3-phenylquinazolin-4(3H)-ones [Electronic resource] / I. G. Ovchinnikova, G. A. Kim, E. G. Matochkina, M. I. Kodess, N. V. Barykin, O. S. Eltsov, E. V. Nosova, G. L. Rusinov, V. N. Charushin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2015. - Vol. 63, № 11. - С. 2467-2477. - Bibliogr. : p. 2477 (22 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
(E)-2-STYRYLQUINAZOLIN-4(3H)-ONES -- LUMINESCENCE -- ORTHO-HYDROXYSTYRYLQUINAZOLINONES
Аннотация: Photoinduced transformations of 2-styrylquinazolinones in solutions were studied using absorption and NMR spectroscopy methods. A possibility of control of the photochemical isomerization rate of quinazolinone 2-(hydroxyaryl)ethenyl derivatives by changing the pH of the medium was demonstrated. The bases and the solvent nature also affect the luminescence intensity of solutions of these compounds in the wavelength range of 550-650 nm. The differences in the steric organization of the ortho-hydroxystyryldiazinone system in crystals and in solutions related to the turn of the aryl group were found. Their influence on the competing processes of luminescence and photochemical transformation of the ethylene fragment were shown. The fact of reversible photo/thermal E-Z-isomerization was established for (E)-2-(2-hydroxystyryl)-3-phenylquinazolin-4(3H)-one.

\\\\expert2\\nbo\\Russian Chemical Bulletin\\2015, 63 (11), 2467-2477.pdf
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7.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of methyl 7-aryl-6-(2-thenoyl)-4,7-dihydro-tetrazolo[1,5-a]pyrimidine-5-carboxylates and their reaction with hydrazine hydrate [Electronic resource] / V. L. Gein, V. V. Mishunin, E. P. Tsyplyakova, M. I. Vakhrin, P. A. Slepukhin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2011. - Vol. 47, № 7. - P1077-1082. - Bibliogr. : p. 1082 (5 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Fusion of methyl 4-(2-thienyl)-2,4-dioxobutanoate with 1H-tetrazol-5-amine monohydrate and aromatic aldehyde gave methyl 7-aryl-6-(2-thenoyl)-4,7-dihydrotetrazolo[1,5-a]pyrimidine-5-carboxylates which reacted with an equimolar amount of hydrazine hydrate at 180-190A degrees C under solvent-free conditions to produce 9-aryl-8-(2-thienyl)-4,9-dihydrotetrazolo[1',5': 1,2]pyrimido[4,5-d]pyridazin-5(6H)-ones

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2011, 47 (7), 1077.pdf
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8.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of Functionalized Fluorescent Europium(III) Terpyridyl Chelates [Text] / V. N. Kozhevnikov, D. N. Kozhevnikov, V. L. Rusinov, O. N. Chupakhin, B. Konig // Synthesis. - 2003. - № 15. - P2400-2404. - Bibliogr. : p. 2404 (19 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
DIELS-ALDER REACTION -- HETEROCYCLES -- LANTHANIDE -- LIGANDS -- PYRIDINES -- EUROPIUM
Аннотация: The synthesis of substituted terpyridines via triazine intermediates is described. The intermediates allow the facile introduction of cyano groups, which are converted into amino diacetic acid moieties. Together with the terpyridine nitrogen atoms they shield coordinated europium(III) ions completely from the solvent. The terpyridines may be further functionalized for specific applications using ligands, bromo substituents, and standard transition metal mediated coupling methods. This makes the title compounds valuable intermediates for the preparation of luminescent probes in biochemistry, medicinal diagnostics or materials science.

\\\\Expert2\\nbo\\Synthesis\\2003, v.15. p.2400.Chupakhin.pdf
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9.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of fluorine containing glycolurils and oxazolines from oxides of internal perfluoroolefins [Text] / L. V. Saloutina, A. Ya. Zapevalov, V. I. Saloutin, P. A. Slepukhin, M. I. Kodess, O. N. Chupakhin // Journal of Fluorine Chemistry. - 2009. - Vol. 130, № 10. - P853-860
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
OXIDES OF INTERNAL PERFLUOROOLEFINS -- 1,5-bIS(PERFLUOROALKYL)TETRAAZABICYCLO[3.3.0]OCTANE-3,7-D
Аннотация: The reaction of oxides of internal perfluoroolefins 1–3 with urea gave two kinds of novel fluorine containing N-heterocyclic compounds depending on the solvent nature: 1,5-bis(perfluoroalkyl)tetraazabicyclo[3.3.0]octane-3,7-diones 4a–c and 2-amino-5-fluoro-4,5-bis(perfluoroalkyl)-4,5-dihydrooxazol-4-ols 7a–d. Use of polar dimethylsulfoxide, N,N-dimethylacetamide and acetonitrile afforded glycolurils 4a–c in moderate yields. In dioxane, unexpected cyclization occurred resulting in oxazolines 7a–d in high yields. A similar reaction of oxiranes 2, 3 with urea in aqueous dioxane gave mixtures of 4,5-dihydroxy-4,5-bis(perfluoroalkyl)imidazolidine-2-ones 9b, c, glycolurils 4b, c and oxazolines 7b–d. The molecular structure of trans-isomers of oxazoline 7b and imidazolidine 9b has been established by X-ray crystallography??

\\\\Expert2\\nbo\\Journal of Fluorine Chemistry\\2009, V. 130, P. 853.pdf
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10.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of Aminomethyl Derivatives of 3-Methyl-4,7-dihydro-3H-imidazo[4,5-d][1,2,3]triazin-4-one [Text] / G. L. Rusinov, R. I. Ishmetova, I. S. Selezneva, T. A. Kalugina // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2000. - Vol. 36, № 6. - P873-876
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: New aminomethyl derivatives of 3-methyl-4,7-dihydro-3H-imidazo[4,5-d][1,2,3]triazin-4-one??were synthesized by Mannich reaction. These Mannich bases is also possible to prepare by reaction of??7(5)-hydroxymethyl-3-methyl-4,7(5)dihydro-3H-imidazo[4,5-d][1,2,3]triazin-4-one with amines.The??compounds obtained exist in solutions as mixtures of N5??and N7 isomers,and the fraction of the latter grows??with the polarity of the solvent.

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11.
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    Synthesis of 2-imidazolines by co-grinding of n-tosylaziridines and nitriles / A. De, A. Majee, S. Santra [et al.] // Mendeleev Communications. - 2020. - Vol. 30, № 2. - P188-189
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
2-IMIDAZOLINES -- AZIRIDINES -- GRINDING -- HETEROCYCLIZATION -- NITRILES -- SOLVENT-FREE REACTIONS
Аннотация: Solvent-free solid-state co-grinding of N-tosylaziridines and nitriles in the presence of perchloric acid as the catalyst affords 2-imidazolines in good yields.

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12.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of 2,3-bis(perfluoroalkyl)quinoxalines and 2,3-bis(perfluoroalkyl)-1,4-benzoxazines from oxides of internal perfluoroolefins [Electronic resource] / L. V. Saloutina, A. Ya. Zapevalov, V. I. Saloutin, M. I. Kodess, V. E. Kirichenko, M. G. Pervova, O. N. Chupakhin // Journal of Fluorine Chemistry. - 2005. - Vol. 126, № 6. - P976-983
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The reactions of oxides of internal trans-, cis-perfluoroolefins with o-phenylenediamine and 2-aminophenol in dioxane gave 2,3-bis(perfluoroalkyl)quinoxalines and 2,3-bis(perfluoroalkyl)-2H-1,4-benzoxazin-2-ols respectively in yields of 23–67%. When N,N-dimethylacetamide was used as a solvent an anionic isomerization of the oxides into ketones, which further yielded 2-(perfluoroalkyl)benzimidazoles in the case of o-phenylenediamine and 2-hydroxy-N-perfluoroalkanoylanilines in the case of 2-aminophenol, became the main path of these reactions. Unusual cyclization resulting in 2-pentafluoroethyl-2-pentafluoropropanoylbenzoxazolidine occurs on interaction between dodecafluoro-3,4-epoxyhexane and 2-aminophenol in N,N-dimethylacetamide.

\\\\Expert2\\nbo\\Journal of Fluorine Chemistry\\2005, v.126, p.976.pdf
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13.
Инвентарный номер: нет.
   
   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
ББК 54
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
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14.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis and properties of new π-conjugated imidazole/carbazole structures / R. A. Irgashev, N. A. Kazin, N. I. Makarova, I. V. Dorogan, V. V. Malov, A. R. Tameev, G. L. Rusinov, A. V. Metelitsa, V. I. Minkin, V. N. Charushin // Dyes and Pigments. - 2017. - Vol. 141. - P512-520
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
IMIDAZOLES -- CARBAZOLES -- ABSORPTION SPECTRA -- PHOTOLUMINESCENCE -- TDDFT CALCULATIONS -- CHARGE MOBILITY
Аннотация: New 3-(1H-imidazol-2-yl)-9H-carbazoles and 6,6′-di(1H-imidazol-2-yl)-9H,9′H-3,3′-bicarbazoles have been prepared, starting from 9-ethyl-9H-carbazole-3-carbaldehyde or 9,9′-diethyl-9H,9′H-[3,3′-bicarbazole]-6,6′-dicarbaldehyde through their reactions with 4-methoxyaniline or 4-fluoroaniline, benzil or 2,2′-thenil [1,2-di(thien-2,2′-yl) glyoxal] and ammonium acetate on reflux in glacial acetic acid. The obtained compounds have been shown to demonstrate an effective fluorescence in the blue spectral region, exhibiting quantum yields in the range of 0.08–0.51, depending on their molecular structure and solvent polarity. The nature of the observed absorption spectra has been elucidated by the TDDFT calculations.

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15.
Инвентарный номер: нет.
   


   
    Substitution of cyano group in position 5 of 1,2,4-triazines by carboxylic acid hydrazide residues under solvent-free conditions / D. S. Kopchuk, A. P. Krinochkin, E. S. Starnovskaya, Y. K. Shtaitz, I. S. Kovalev, G. V. Zyryanov, V. L. Rusinov, O. N. Chupakhin // Russian Journal of Organic Chemistry. - 2018. - Vol. 54, № 3. - P509-511
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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16.
Инвентарный номер: нет.
   
   S 83


   
    Stereoselective hetero-Diels–Alder reaction of 3-nitro-2-trihalomethyl-2H-chromenes with 2,3-dihydrofuran and ethyl vinyl ether under solvent-free conditions [Text] / V. Yu. Korotaev, V. Ya. Sosnovskikh, M. A. Barabanov, E. S. Yasnova, M. A. Ezhikova, M. I. Kodess, P. A. Slepukhin // Tetrahedron. - 2010. - Vol. 66, № 6. - P1404-1409
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 3-Nitro-2-trifluoro(trichloro)methyl-2H-chromenes undergo heterodiene cycloaddition to 2,3-dihydrofuran and ethyl vinyl ether under solvent-free conditions producing novel cyclic nitronates with high stereoselectivity and in good yields. 3,6-Dinitro-2-trifluoromethyl-2H-chromene reacts with two molecules of ethyl vinyl ether to give the tandem [4+2]/[3+2] cycloaddition adduct in 48% yield. The stereochemistry of the products was established based on 2D COSY, NOESY, HSQC, and HMBC experiments and an X-ray diffraction study

\\\\Expert2\\nbo\\Tetrahedron\\2010, v.66, N 6, p.1404.pdf
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17.
Инвентарный номер: нет.
   
   S 70


   
    Solvent-free synthesis of pillar[6]arenes [Electronic resource] / S. Santra, D. S. Kopchuk, I. S. Kovalev, G. V. Zyryanov, A. Majee, V. N. Charushin, O. N. Chupakhin // Green Chemistry. - 2016. - Vol. 18. - С. 423-426. - Bibliogr. : p. 5 (16 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
PILLAR[6]ARENES -- SOLVENT-FREE PROCEDURE
Аннотация: An efficient solvent-​free procedure for the synthesis of pillar[6]arenes has been developed. The procedure involves the solid-​state condensation of finely milled 1,​4-​dialkoxybenzene and paraformaldehyde by grinding in the presence of a catalytic amt. of H2SO4. The use of org. solvents for the extn. of products has also been avoided. Operational simplicity, compatibility with various 1,​4-​dialkoxybenzenes, non-​chromatog. purifn. technique, high yields and mild reaction conditions are the notable advantages of this procedure. A large scale reaction demonstrated the practical applicability of this methodol.

\\\\expert2\\nbo\\Green Chemistry\\2015. Accepted Manuscript. P. 1-5. pdf.pdf
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18.
Инвентарный номер: нет.
   
   S 70


   
    Solvent-free synthesis of 5-(aryl/alkyl)amino-1,2,4-triazines and α-arylamino-2,2′-bipyridines with greener prospects / D. S. Kopchuk, N. V. Chepchugov, I. S. Kovalev, S. Santra, M. Rahman, G. V. Zyryanov, V. N. Charushin, O. N. Chupakhin, K. Giri, A. Majee // RSC Advances. - 2017. - Vol. 7, № 16. - P9610-9619
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A green and highly efficient method has been developed for the synthesis of 5-(aryl/alkyl)amino-1,2,4-

\\\\Expert2\\NBO\\RSC Advances\\2017 v.7 p.9610-9619.pdf
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19.
Инвентарный номер: нет.
   
   S 70


   
    Solvent-free reaction of 1,2,4-triazine-5-carbonitriles with 4-(cyclohex-1-en-1-yl)morpholine. unexpected decyanation in addition to classical aza-Diels–Alder reaction / D. S. Kopchuk, A. F. Khasanov, N. V. Chepchugov, I. S. Kovalev, G. V. Zyryanov, V. L. Rusinov, O. N. Chupakhin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2017. - Vol. 53, № 1. - P99-102
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The reaction of 1,2,4-triazine-5-carbonitriles with 4-(cyclohex-1-en-1-yl)morpholine under solventfree conditions has been found to follow two pathways: aza-Diels–Alder reaction and unexpected decyanation of the initial nitriles. The scope of the revealed decyanation reaction has been roughly estimated.

\\\\Expert2\\NBO\\Russian Journal of Organic Chemistry\\2017 V 53 N 1 P. 99-102.pdf
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20.
Инвентарный номер: нет.
   
   S 53


    Shcherbakov, K. V.
    Reactions of 5,6,7,8-tetrafluoro-4-hydroxycoumarin derivatives with benzylamine and aniline [Electronic resource] / K. V. Shcherbakov, Ya. V. Burgart, V. I. Saloutin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2006. - Vol. 55, № 7. - P1215-1219
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 5,6,7,8-Tetrafluoro-4-hydroxycoumarin reacted with benzylamine under mild conditions to give a stable salt, while its refluxing with aniline or benzylamine in xylene afforded 5,6,7,8-tetrafluoro-4-phenyl(benzyl)aminocoumarins. Reactions of 3-acetyl(acetimidoyl)-5,6,7,8-tetrafluoro-4-hydroxycoumarins with benzylamine followed different pathways, depending on the solvent. Condensation at the acyl substituent can be accompanied by replacement of the F atom in position 7. 3-Acetylcoumarin formed a salt, while 3-acetimidoylcoumarin yielded a 7-monosubstituted product. 3-Acetyl(acetimidoyl)-5,6,7,8-tetrafluoro-4-hydroxycoumarins reacted with aniline to give only 5,6,7,8-tetrafluoro-4-hydroxy-3-(N-phenylacetimidoyl)coumarin

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