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Общее количество найденных документов : 20
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 1-10    11-20  
1.
Инвентарный номер: нет.
   
   A 10


   
    A convenient approach to the design and synthesis of indolo[3,2-c]coumarins via the microwave-assisted Cadogan reaction [Electronic resource] / R. A. Irgashev, A. A. Karmatsky, P. A. Slepukhin, G. L. Rusinov, V. N. Charushin // Tetrahedron Letters. - 2013. - Vol.54, №42. - С. 5734-5738. - Bibliogr. : p. 5738 (17 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
COUMARINS -- MICROWAVE-ASSISTED -- CADOGAN REACTION
Аннотация: 3-(4,5-Dimethoxy-2-nitrophenyl)coumarins bearing various substituents on the benzene ring of the coumarin system have been prepared from salicylaldehydes and 2-(4,5-dimethoxy-2-nitrophenyl)acetonitrile by means of the Perkin condensation. Further cyclization of these 3-aryl coumarins through the microwave-assisted Cadogan reaction afforded the corresponding indolo[3,2-c]coumarins in good to excellent yields

\\\\expert2\\NBO\\Tetrahedron Letters\\2013, v. 54, p. 5734.pdf
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2.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis, photophysical and electrochemical properties of novel 6,12-di(thiophen-2-yl) substituted indolo[3,2-b]carbazoles [Electronic resource] / R. A. Irgashev, A. Yu. Teslenko, E. F. Zhilina, A. V. Schepochkin, O. S. Eltsov, G. L. Rusinov, V. N. Charushin // Tetrahedron. - 2014. - Vol.70, №31. - С. 4685-4696
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
INDOLO[3,2-B]CARBAZOLE -- INDOLE -- THIOPHENE
Аннотация: Novel 5,11-dialkyl-6,12-di(thiophen-2-yl) substituted 5,11-dihydroindolo[3,2-b]carbazoles have been obtained and plausible ways for their further modifications via the Friedel–Crafts reaction are presented. The formylation of these indolo[3,2-b]carbazoles with dichloromethyl alkyl esters catalysed by Lewis acids leads to the formation of the corresponding 2,8-diformyl derivatives. Applicability of this formylation method for modification of indolo[3,2-b]carbazoles bearing electron-rich aromatic substituents at C-6 and C-12 has also been demonstrated. The Knoevenagel condensation of 2,8-dialdehydes with active methylene nitriles has been studied. The measurements of optical and redox properties for a number of new indolo[3,2-b]carbazoles have been performed

\\\\expert2\\nbo\\Tetrahedron\\2014, v. 70 , p. 4685-4696.pdf
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3.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of 4-(thien-2-yl)-substituted coumarins through Lewis acid catalyzed Michael addition of thiophenes to 3-benzoylcoumarins followed by oxidation [Electronic resource] / R. A. Irgashev, A. A. Karmatsky, G. L. Rusinov, V. N. Charushin // Tetrahedron Letters. - 2014. - Vol.55, №26. - С. 3603-3606
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
THIOPHENES -- 3-BENZOYLCOUMARINS -- Lewis acid
Аннотация: 3-Benzoyl-4-(thien-2-yl)coumarins have been obtained in good yields according to the SNH addition–oxidation protocol, involving the diastereoselective addition of thiophenes at C-4 of 3-benzoylcoumarins under BBr3 catalysis, followed by oxidation of the intermediate 3,4-trans-3-benzoyl-4-(thien-2-yl)-3,4-dihydrocoumarins with DDQ. This two-step procedure can be regarded as nucleophilic substitution of hydrogen (SNH) on the heterocyclic ring of coumarins

\\\\expert2\\nbo\\Tetrahedron Letters\\2014, v. 55, p. 3603.pdf
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4.
Инвентарный номер: нет.
   


   
    5-(Methylidene)barbituric acid as a new anchor unit for dye-sensitized solar cells (DSSC) [Electronic resource] / R. A. Irgashev, G. A. Kim, G. L. Rusinov, V. N. Charushin // ARKIVOC. - 2014. - Vol. 2014, №5. - С. 123-131. - Bibliogr. : p. 131 (14 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ANCHOR GROUP -- BARBITURIC ACID -- CARBAZOLE
Аннотация: Novel dyes bearing a 5-(methylidene)barbituric acid moiety as a new acceptor/anchor fragment were obtained and exhibited remarkable photophysical properties, according to a preliminary assessment of their sensitization activity as elements for dye-sensitized solar cells

\\\\expert2\\nbo\\ARKIVOC\\2014, p.123-131.pdf
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5.
Инвентарный номер: нет.
   
   M 61


   
    Metal-free synthesis of 4-(thien-2-yl) substituted coumarins through direct C-H/C-H coupling of 3-benzoylcoumarins with thiophenes / A. A. Karmatsky, R. A. Irgashev, G. L. Rusinov, V. N. Charushin // Уральский научный форум "Современные проблемы органической химии". XVII Молодежная школа-конф. по органической химии, Екатернинбург, 8-12 июня 2014 г. : сб. тез. - Екатеринбург, 2014. - С. 154. - Библиогр.: с. 154 (2 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
SYNTHESIS -- THIOPHENES -- AROYLCHROMONES

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6.
Инвентарный номер: нет.
   
   R 35


   
    Regioselective C2-and C8-Acylation of 5,11-Dihydroindolo[3,2-b]carbazoles and the Synthesis of Their 2,8-Bis(quinoxalinyl) Derivatives [Electronic resource] / R. A. Irgashev, N. A. Kazin, G. A. Kim, G. L. Rusinov, V. N. Charushin // Synthesis-Stuttgart. - 2015. - Vol. 47, № 22. - С. 3561-3572. - Bibliogr. : p. 3572 (11 ref)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
5,11-DIHYDROINDOLO[3,2-B]CARBAZOLES -- 2-ARYLGLY-OXALS -- ACYLATION
Аннотация: An efficient approach for the double acetylation of 5,11-dihexyl- 6,12-di(hetero) aryl-substituted 5,11-dihydroindolo[3,2-b] carbazoles with acetic anhydride in the presence of boron trifluoride etherate has been developed, thus affording the corresponding 2,8-diacetyl derivatives in good yields. A similar acylation has been shown to occur by the reaction of anhydrides of other carboxylic acids. Oxidation of the obtained 2,8-diacetyl derivatives with selenium dioxide takes place on heating or under microwave irradiation, thus resulting in the formation of the corresponding 2,8-diglyoxals. The latter proved to react with aromatic o-diamines to afford new indolo[3,2-b] carbazoles bearing quinoxalinyl fragments at C-2 and C-8. Major optical properties of quinoxaline- containing indolo[3,2-b] carbazoles have been measured.

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7.
Инвентарный номер: нет.
   
   A 10


   
    A new and convenient synthetic way to 2-substituted thieno[2,3-b]indoles [Electronic resource] / R. A. Irgashev, A. A. Karmatsky, G. L. Rusinov, V. N. Charushin // Beilstein Journal of Organic Chemistry. - 2015. - Vol. 11. - С. 1000-1007. - Bibliogr. : p. 1006-1007 (35 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ALDOL-CROTONIC CONDENSATION -- LAWESSON'S REAGENT -- ISATIN
Аннотация: A short and robust approach for the synthesis of 2-(hetero)aryl substituted thieno[2,3-b]indoles from easily available 1-alkylisatins and acetylated (hetero)arenes has been advanced. The two-step procedure includes the "aldol-crotonic" type of condensation of the starting materials, followed by treatment of the intermediate 3-(2-oxo-2-(hetero)arylethylidene) indolin-2-ones with Lawesson's reagent. The latter process involves two sequential reactions, namely reduction of the C=C ethylidene double bond of the intermediate indolin-2-ones followed by the Paal-Knorr cyclization, thus affording tricyclic thieno[2,3-b]indoles.

\\\\expert2\\nbo\\Beilstein Journal of Organic Chemistry\\2015, v. 11, p.1000-1007.pdf
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8.
Инвентарный номер: нет.
   
   D 62


   
    Direct arylalkenylation of furazano[3,4-b]pyrazines via a new C-H functionalization protocol [Electronic resource] / N. A. Kazin, Yu. A. Kvashnin, R. A. Irgashev, W. Dehaen, G. L. Rusinov, V. N. Charushin // Tetrahedron Letters. - 2015. - Vol. 56, № 14. - С. 1865-1869. - Bibliogr. : p. 1869 (20 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
NUCLEOPHILIC-SUBSTITUTION -- DERIVATIVES -- HYDROGEN
Аннотация: 6-Styryl-5-(het)arylfurazano[3,4-b]pyrazines have been obtained by novel C-H functionalization, which is a particular case of the nucleophilic substitution of hydrogen (S-N(H)). The process is initiated by the Michael addition of morpholine at the C=C double bond of beta-nitrostyrenes, and the subsequent addition of the generated carbanion to C-6 of 5-(het)arylfurazano[3,4-b]pyrazines, followed by elimination of nitrous acid and morpholine. It has been shown that in this case, only beta-nitrostyrenes bearing electron-rich substituents on the aromatic ring are involved in arylalkenylation of furazano[3,4-b]pyrazines

\\\\expert2\\nbo\\Tetrahedron Letters\\2015, v. 56, p. 1865.pdf
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9.
Инвентарный номер: нет.
   
   A 10


   
    A facile and convenient synthesis and photovoltaic characterization of novel thieno[2,3-b]indole dyes for dye-sensitized solar cells [Electronic resource] / R. A. Irgashev, A. A. Karmatsky, S. Kozyukhin, V. K. Ivanov, A. Sadovnikov, V. V. Kozik // Synthetic Metals. - 2015. - Vol. 199. - С. 152-158. - Bibliogr. : p. 158 (28 ref/)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
THIENO[2,3-b]INDOLE -- DYES -- THIOPHENE
Аннотация: Two novel dyes IK-1,2 bearing the 8-alkyl-8H-thieno[2,3-b]indole unit as an electron-donating part of the push-pull system have been designed and prepared, as promising sensitizers for solar cells. The key steps of the synthesis involve the crotonic condensation of 1-alkylisatins with 2-acetylthiophene, followed by reduction of the C=C double bond and further cyclization through the Paal-Knorr reaction with the Lawesson reagent, thus leading to the formation of 2-(thien-2-yl) substituted thieno[2,3-b] indole derivatives. The optical and electrochemical properties of these dye's have been investigated by using spectrophotometry and cyclic voltammetry respectively, while their photovoltaic performance was evaluated by a device fabricatien study. The DSSCs based on IK-1 and IK-2 have demonstrated an efficiency of eta = 0.37% (FF = 73%) and eta = 0.7g% (FF = 69%) under 100 mW cm(-2) simulated AM 1.5G solar irradiation, respectively.

\\\\expert2\\nbo\\Synthetic Mеtals\\2015, V.199, p. 152-158.pdf
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10.
Инвентарный номер: нет.
   
   R 35


   
    Regioselective C2- and C8-Acylation of 5,11-Dihydroindolo[3,2-b]carbazoles and the Synthesis of Their 2,8-Bis(quinoxalinyl) Derivatives [Electronic resource] / R. A. Irgashev, N. A. Kazin, G. A. Kim, G. L. Rusinov, V. N. Charushin // Synthesis (Germany). - 2015. - Vol. 47, № 22. - С. 3561-3572
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
5,11-DIHYDROINDOLO[3,2-B]CARBAZOLES -- ACYLATION -- 2-ARYLGLYOXALS
Аннотация: An efficient approach for the double acetylation of 5,11-dihexyl-6,12-di(hetero)aryl-substituted 5,11-dihydroindolo[3,2-b]carbazoles with acetic anhydride in the presence of boron trifluoride etherate has been developed, thus affording the corresponding 2,8-diacetyl derivatives in good yields. A similar acylation has been shown to occur by the reaction of anhydrides of other carboxylic acids. Oxidation of the obtained 2,8-diacetyl derivatives with selenium dioxide takes place on heating or under microwave irradiation, thus resulting in the formation of the corresponding 2,8-diglyoxals. The latter proved to react with aromatic o-diamines to afford new indolo[3,2-b]carbazoles bearing quinoxalinyl fragments at C-2 and C-8. Major optical properties of quinoxaline-containing indolo[3,2-b]carbazoles have been measured.

\\\\expert2\\nbo\\Synthesis\\2015, v. 47. N 22. p.3561-3572.pdf
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