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1.
Инвентарный номер: нет.
   


   
    (A)symmetric chromophores based on cyano and fluorine-substituted 2,3-bis(5-arylthiophen-2-yl)quinoxalines: Synthesis, photophysical properties and application prospects / T. N. Moshkina, E. V. Nosova, A. E. Kopotilova [et al.] // Dyes and Pigments. - 2022. - Vol. 204. - Ст. 110434
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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2.
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    (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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3.
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    1,2,4,5-Tetrazine derivatives as components and precursors of photo- and electroactive materials / G. N. Lipunova, E. V. Nosova, G. V. Zyryanov [et al.] // Organic chemistry frontiers. - 2021. - Vol. 8, № 18. - P5182-5205
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Extensive research on the synthesis and application of tetrazine derivatives for electronic devices, luminescent elements, photoelectric conversion elements, and image sensors has been published recently. This review covers reported data on the modern trends in the design of functionalized tetrazines obtained within the period 2010–2020. Aryl(heteroaryl) and arylvinyl derivatives of tetrazines and their photoluminescence and application for fluorogenic probes are discussed. Examples of photosensitive oligomers and polymer 3,6-dithienyltetrazines are reviewed.

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4.
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    1,3,7-triazapyrene-based ortho-carborane fluorophores: convenient synthesis, theoretical studies, and aggregation-induced emission properties / L. A. Smyshliaeva, M. V. Varaksin, E. I. Fomina [et al.] // Organometallics. - 2021. - Vol. 40, № 16. - P2792-2807
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A convenient transition-metal-free approach, based on nucleophilic substitution of hydrogen (SNH), for consecutive regioselective C–H functionalization of 1,3,7-triazapyrene scaffolds with carboranyllithium and phenyllithium is reported. The theoretical calculations disclosed highlight key features in the regioselectivity and mechanism of the investigated SNH transformations. The novel 1,3,7-triazapyrene-based ortho-carboranes obtained have large potential in the field of molecular electronics as organic luminophores, which are characterized by the aggregation-induced emission and dual-emission effects.

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5.
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    15N chemical shifts and Jnn-couplings as diagnostic tools for determination of the azide-tetrazole equilibrium in tetrazoloazines / S. L. Deev, T. S. Shestakova, Z. O. Shenkarev [et al.] // Journal of Organic Chemistry. - 2022. - Vol. 87, № 1. - P211–222
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Selectively 15N-labeled tetrazolo[1,5-b][1,2,4]triazines and tetrazolo[1,5-a]pyrimidines bearing one, two, or three 15N labels were synthesized. The synthesized compounds were studied by 1H, 13C, and 15N NMR spectroscopy in DMSO and TFA solutions, where the azide–tetrazole equilibrium can lead to the formation of two tetrazole (T, T′) isomers and one azide (A) isomer for each compound. Incorporation of the 15N-label(s) leads to the appearance of 15N–15N coupling constants (JNN), which can be easily measured via simple 1D 15N NMR spectra, even at natural abundance between labeled and unlabeled 15N atoms. The chemical shifts for the 15N nuclei in the azole moiety are very sensitive to the ring opening and azide formation, thus providing information about the azido–tetrazole equilibrium. At the same time, the 1–2JNN couplings between 15N-labeled atoms in the azole and azine fragments unambiguously determine the fusion type between tetrazole and azine rings in the cyclic isomers T and T′. Thus, combined analysis of 15N chemical shifts and JNN values in selectively isotope-enriched compounds provides an effective diagnostic tool for direct structural determination of tetrazole isomers and azide form in solution. This method was found to be the most simple and efficient way to study the azido–tetrazole equilibrium.

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6.
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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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7.
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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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8.
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    3-(2-Arylhydrazono)-1,1,1-trifluro-3-(phenylsulfonyl)propan-2-ones as selective carboxylesterase inhibitors / E. V. Shchegolkov, Y. V. Burgart, N. A. Elkina [et al.] // Russian chemical bulletin. - 2022. - Vol. 71, № 1. - P158-164
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: We improved the synthetic procedure for 3-(2-arylhydrazono)-1,1,1-trifluro-3-(phenylsulfonyl)propan-2-ones and established their structure. The study of their esterase profile showed the absence of cholinesterase inhibition and the selectivity against carboxylesterase with micromolar activity exceeding the anticarboxylesterase activity of the diketone analog. Carboxylesterase inhibition data are consistent with molecular docking results. 3-(2-Arylhydrazono)-1,1,1-trifluro-3-(phenylsulfonyl)propan-2-ones exhibit a high radical-scavenging effect in the ABTS test exceeding that of Trolox.

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9.
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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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10.
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    9-substituted acridine derivatives as acetylcholinesterase and butyrylcholinesterase inhibitors possessing antioxidant activity for alzheimer's disease treatment / G. F. Makhaeva [et al.] // Bioorganic and Medicinal Chemistry. - 2017. - Vol. 25, № 21. - P5981-5994
ББК 24
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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