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Общее количество найденных документов : 62
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1.
Инвентарный номер: нет.
   


   
    Boron(III) Complexes with N,​N'- and N,​O-​Heterocyclic Ligands: Synthesis and Spectroscopic Properties [Electronic resource] / G. N. Lipunova, E. V. Nosova, V. N. Charushin, O. N. Chupakhin // Comments on Inorganic Chemistry. - 2016. - Vol. 2016. - С. 1153470
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
PROPERTIES -- PREPARATION -- SYNTHETIC PREPARATION
Аннотация: This review is focused on consideration of effects of the nature of N,​N'- and N,​O-​bidentate ligands on the structure and optical properties of their B(III) complexes. It has been established that B(III) complexes with asym. N,​N'- and N,​O-​bidentate ligands, such as ortho-​hydroxyphenyl substituted azaheterocycles and heteryl-​β-​ketoimines, exhibit large Stokes shifts, enhanced intensity, and extended range for luminescence in solns. as well as in solid state, comparable with characteristics of the family of BODIPYs derivs. Complexes of some bidentate ligands can be considered as promising fluorophores for applications in biomedical imaging, electroluminescent, solar cell devices, and other fields.

\\\\expert2\\nbo\\Comments on Inorganic Chemistry\\2016. P. 1153470.pdf
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2.
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    1,2,4-Triazine method of bipyridine ligand synthesis for the preparation of new luminescent Eu(III) complexes [Text] / A. M. Prokhorov, V. N. Kozhevnikov, D. S. Kopchuk, D. N. Kozhevnikov // Tetrahedron. - 2011. - Vol. 67, № 3. - P597-607
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The ‘triazine’ methodology for the synthesis of functionalised bipyridine ligands proved to be a convenient method for the preparation of luminescent Eu(III) complexes. The approach allows flexible construction of chromophore and coordination sphere with control of photophysical properties. Europium (III) complexes [Eu1]-[Eu5] prepared in this way exhibit intense long-life metal-centered luminescence in aqueous media. The aromatic substituent in the position 5 of bipyridine has a significant influence on luminescence parameters and is used to introduce functionality for bioconjugation. The complexes [Eu4] and [Eu5] bearing primary amine groups are ready-to-go luminescent ‘tags’ for peptide labeling

\\\\Expert2\\nbo\\Tetrahedron\\2011, v. 67, p. 597.pdf
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3.
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    1H-pyrazole-appended pyridines and their 1,2,4-triazine precursors: a rational synthesis and in silico and in vitro evaluation of anti-cancer activity / A. P. Krinochkin, Y. K. Shtaitz, A. K. Rammohan [et al.] // European Journal of Organic Chemistry. - 2022. - Vol. 2022, № 22. - Pe202200227
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: An operationally facile and high yielding one-pot protocol has been developed for the preparation of pyridines appended with pyrazole via NH linker. This protocol includes SNipso/aza-Diels-Alder reactions in up to 54 % yields starting from 1,2,4-triazine precursors. All the synthesized compounds have been evaluated for their in silico activity against JAK1, SYK, and FAK1 kinases. The most promising compound was tested in vitro using A-172, Hs578T, and HepG2 cancer cell lines and exhibited considerable cytotoxicity with IC50 values 50 μM in A-172 and HepG2 cell lines. Anticancer in vitro activity correlates well with the predicted in silico data.

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4.
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    4-Hydroxy-3-nitro-1,4-dihydrotriazolo[5,1-c][1,2,4]triazines: synthesis, antiviral activity, and electrochemical characteristics / R. A. Drokin, E. A. Fesenko, P. N. Mozharovskaia [et al.] // Russian chemical bulletin. - 2022. - Vol. 71, № 11. - P2460-2466
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A new method for preparation of 4-hydroxy-3-nitro-1,4-dihydrotriazolo[5,1-c][1,2,4]-triazines using 1-nitro-2-morpholinoethylene and 3-diazo-1,2,4-triazoles is proposed. Antiviral activity against the Coxsackie B3 virus and electrochemical transformations of the prepared compounds are studied.

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5.
Инвентарный номер: нет.
   
   A 10


   
    A comparative study on the acylative kinetic resolution of racemic fluorinated and non-fluorinated 2-methyl-1,2,3,4-tetrahydroquinolines and 3,4-dihydro-3-methyl-2H-[1,4]benzoxazines [Electronic resource] / D. A. Gruzdev, E. N. Chulakov, G. L. Levit, M. A. Ezhikova, M. I. Kodess, V. P. Krasnov // Tetrahedron: Asymmetry . - 2013. - Vol.24, №19. - С. 1240-1246. - Bibliogr. : p. 1246 (21 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
RACEMIC FLUORINATED -- 1,2,3,4-TETRAHYDROQUINOLINES -- BENZOXAZINES
Аннотация: The acylative kinetic resolution of racemic 6-fluoro-2-methyl-1,2,3,4-tetrahydroquinoline, 7,8-difluoro-3,4-dihydro-3-methyl-2H-[1,4]benzoxazine, and their non-fluorinated analogues with (S)-naproxen and N-phthaloyl-(S)-amino acyl chlorides has been carried out. It has been shown that the presence of fluorine atoms in the aromatic fragment of a heterocyclic amine results in the increasing stereoselectivity of acylation with (S)-naproxen acyl chloride and in a decrease in the efficiency of acylative kinetic resolution using N-phthaloyl-(S)-amino acyl chlorides. A method for the preparation of enantiopure (S)-6-fluoro-2-methyl-1,2,3,4-tetrahydroquinoline (ee >99%) was developed

\\\\expert2\\NBO\\Tetrahedron Asymmetry\\2013, in Press, Corr. Proof, 4 Sept.pdf
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6.
Инвентарный номер: нет.
   
   A 10


   
    A convenient method for the preparation of mono- and bis-substituted photochromic bis(benzothienyl)perfluorocyclopentenes via regioselective Friedel–Crafts acylation / N. S. Bogatishcheva, V. N. Yarovenko, K. S. Levchenko, O. I. Kobeleva, T. M. Valova, V. A. Barachevskii, M. I. Struchkova, P. S. Shmelin, M. M. Krayushkin, V. N. Charushin // Tetrahedron Letters. - 2012. - Vol.53, №44. - С. 5948-5951
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
REGIOSELECTIVE FRIEDEL–CRAFTS ACYLATION -- PHOTOCHROME -- BENZOFURANS
Аннотация: The regioselective Friedel–Crafts acylation of 1,2-bis(2-methylbenzo[b]thien-3-yl)hexafluorocyclopentene was developed. Depending on the reaction conditions, mono- or bis(bromoacetyl) derivatives are formed as single products in good yields. Further heterocyclizations involving α-bromoketone moieties gave a series of new photochromic compounds

\\\\Expert2\\nbo\\Tetrahedron Letters\\2012, v. 53, p. 5948.pdf
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7.
Инвентарный номер: нет.
   
   A 10


   
    A new approach to the synthesis of lamotrigine and other 3,5-diamino-1,2,4-triazine derivatives [Electronic resource] / E. N. Ulomskii, T. S. Shestakova, S. L. Deev, V. L. Rusinov, O. N. Chupakhin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2005. - Vol. 54, № 3. - P726-732
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A new in principle method for the synthesis of 6-aryl(hetaryl)-3,5-diamino-1,2,4-triazines by decomposition of pre-synthesized tetrazolo[1,5-b][1,2,4]triazines was developed. The advantages of this method over traditional methods were demonstrated using the synthesis of a modern antiepileptic preparation lamotrigine, as an example

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2005, 54 (3), 726.pdf
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8.
Инвентарный номер: нет.
   
   A 19


   
    Acylative kinetic resolution of racemic heterocyclic amines with (R)-2-phenoxypropionyl chloride / S. A. Vakarov [и др.] // Tetrahedron: Asymmetry . - 2016. - Vol. 27, № 24. - С. 1231-1237. - Bibliogr. : p. 1236-1237 (15 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HETEROCYCLIC AMINES -- BENZOXAZINES -- 2-METHYLINDOLINE -- KINETIC RESOLUTION
Аннотация: The acylative kinetic resolution of racemic heterocyclic amines such as 3,4-dihydro-3-methyl-2H-[1,4]benzoxazines, 3,4-dihydro-3-methyl-2H-[1,4]benzothiazine, 2-methyl-1,2,3,4-tetrahydro-quinolines and 2-methylindoline with enantiopure (R)-2-phenoxypropionyl chloride has been studied. It has been found that acylation of 3,4-dihydro-3-methyl-2H-[1,4]benzothiazine proceeds with the best stereoselectively when compared with other racemic amines. An efficient method for the preparation of (S)-3,4-dihydro-3-methyl-2H-[1,4]benzothiazine (99.4% ee) via a kinetic resolution protocol was developed. The possibility of recycling (R)-2-phenoxypropionic acid has been demonstrated.

\\\\expert2\\NBO\\Tetrahedron Asymmetry\\2016, v. 27, p.1231.pdf
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9.
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    Advances in transition-metal catalyzed carbonylative suzuki-miyaura coupling reaction: an update / D. Bhattacherjee, M. Rahman, S. Ghosh [et al.] // Advanced synthesis and catalysis. - 2021. - Vol. 363, № 6. - P1597-1624
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CARBONYLATION -- SUZUKI-MIYAURA COUPLING -- TRANSITION-METAL CATALYSIS
Аннотация: Transition metals have been an indispensable component of modern catalysis and among these palladium is the top-ranked choice of chemists as a catalyst. After the several important developments of palladium catalysed C−C cross-coupling reactions, carbonylative transformations have been realised as an attractive post modification of these reactions. Carbonylative Suzuki-Miyaura coupling reaction is among such transformations for direct incorporation of CO fragment for the preparation of biaryl or aryl/alkyl ketones via transition-metal catalysis. Ketone functionality is basically a valuable building block having huge pharmaceutical and agrochemical applications. Moreover, carbonylative Suzuki-Miyaura coupling is also used in the synthesis of various natural bioactive molecules through the direct joining of molecular fragments via CO bridge. In this review, the past decade developments in the carbonylative Suzuki-Miyaura coupling reactions are documented in detail with modern approaches in transition-metal catalysis.

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10.
Инвентарный номер: нет.
   
   A 53


   
    An efficient route to 5-(hetero)aryl-2,4'- and 2,2'-bipyridines through readily available 3-pyridyl-1,2,4-triazines [Electronic resource] / V. N. Kozhevnikov, D. N. Kozhevnikov, O. V. Shabunina, V. L. Rusinov, O. N. Chupakhin // Tetrahedron Letters. - 2005. - Vol. 46, № 11. - P1791-1793
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A new route to substituted bipyridines based on a new method for the synthesis of substituted 3-pyridyl-1,2,4-triazines and their aza-Diels-Alder reactions is shown to be an efficient strategy for the preparation of structurally diverse bipyridine ligands.

\\\\Expert2\\nbo\\Tetrahedron Letters\\2005, v. 46, p.1791.pdf
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