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Общее количество найденных документов : 103
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1.
Инвентарный номер: нет.
   

   
    Azolyl pyrimidines-synthesis and antimicrobial activity / N. H. Basha, T. Rekha, V. Padmavathi [et al.] // AIP conference proceedings. - 2022. - Vol. 2390. - Ст. 020006
Рубрики: ЗДРАВООХРАНЕНИЕ. МЕДИЦИНСКИЕ НАУКИ
   ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CHEMICAL COMPOUNDS -- PHARMACEUTICALS -- ANTIMICROBIALS
Аннотация: Amide unit is a privileged structural motif and is a constituent of proteins, natural products and pharmaceuticals. Amongst different heterocyclic scaffolds, azoles and pyrimidines are the prominent entities in pharmaceutical arena. The biopotency of these heterocycles have triggered to synthesize a variety of heteroaromatics – azoles linked with pyridines by amino acetamide group. The target molecules-azolylaminoacetamidopyrimidines were prepared by the reaction of methyl azolylglycinate with pyrimidinyl-2-amine in the presence of DMAP and triethylamine in dichloromethane under ultrasonication. The lead molecules were evaluated for antimicrobial activity. Nitro substituted 2-((4-(4-chlorofuran-2-yl)thiazole-2-yl)amino)-N-(4,6-diphenylpyrimidin-2-yl)acetamide (9c) displayed excellent antibacterial activity against B. subtilis greater than the standard drug Chloramphenicol. However, 9c and nitro substituted 2-((4-(4-chlorofuran-2-yl)-1H-imidazol-2-yl)amino)-N-(4,6-diphenylpyrimidin-2-yl)acetamide (10c) showed antifungal activity on A. niger greater than the standard drug Ketoconazole.

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2.
Инвентарный номер: нет.
   

   
    Synthesis of heterocycles on the base of trifluoroacetoacetate, methyl ketones and diamines / M. V. Goryaeva, S. O. Kushch, Y. V. Burgart, V. I. Saloutin // AIP conference proceedings. - 2022. - Vol. 2390. - Ст. 020021
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
TRIFLUOROACETOACETATE -- METHYL KETONES -- DIAMINES
Аннотация: The three-component cyclization of ethyl trifluoroacetoacetate and 2-aminoethanol with 3-methyl-2-butanone in hexahydrooxazolo[3,2-a]pyridin-5-ones was studied. The reaction leads to a mixture of cis- and trans- diastereomers, the structures of which were investigated using 1H, 19F, 13C NMR spectroscopy.

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3.
Инвентарный номер: нет.
   

   
    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.
   
   F 33

    Fedorova, O. V.
    Metal oxides in multicomponent synthesis of heterocycles / O. V. Fedorova, Y. A. Titova, I. G. Ovchinnikova // Chemistry of Heterocyclic Compounds. - 2021. - Vol. 57, № 9. - P900–904
УДК
Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HETEROCYCLIC COMPOUNDS -- METAL OXIDES -- CHEMOSELECTIVE SYNTHESIS
Аннотация: In this review we consider the possibilities for using metal oxides as heterogeneous catalysts of multicomponent reactions, leading to pharmacologically relevant heterocyclic compounds. Publications from years 2013–2021 are analyzed. The information has been arranged according to the number of atoms in the target heterocycle.

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5.
Инвентарный номер: нет.
   
   N 89

   
    Novel purine conjugates with N-heterocycles: synthesis and anti-influenza activity / V. P. Krasnov, V. V. Zarubaev, D. V. Gruzdev [et al.] // Chemistry of Heterocyclic Compounds. - 2021. - Vol. 57, № 4. - P498-504
УДК
Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
6-CHLOROPURINE -- HETEROCYCLIC AMINES -- ANTIVIRAL ACTIVITY -- INFLUENZA A AND B VIRUSES
Аннотация: A number of novel amides were synthesized by coupling of 6-[(9H-purin-6-yl)amino]hexanoic acid to heterocyclic amines. The antiviral activity of the obtained compounds, as well as of purine conjugates in which 7,8-difluoro-3-methyl-3,4-dihydro-2H-1,4-benzoxazine is linked to position 6 of purine through a fragment of ɷ-amino acids with varying lengths of polymethylene chains against influenza A and B viruses was studied in vitro. Purine derivatives have been shown to have moderate activity against influenza A (H1N1) virus. The antiinfluenza activity and cytotoxicity of conjugates with 7,8-difluoro-3-methyl-3,4-dihydro-2H-1,4-benzoxazine depend on the length of the linker fragment.

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6.
Инвентарный номер: нет.
   

   
    Synthesis of fluorine-containing n,o-heterocycles on the base of 4,5-bis(trifluoromethyl)imidazolidine-2-ones, 2-aminoethanol and 2-aminophenol / L. V. Saloutina, M. I. Kodess, I. N. Ganebnykh [et al.] // Современные синтетические методологии для создания лекарственных препаратов и функциональных материалов" (MOSM 2021): V международная конференция: сборник тезисов. - Екатеринбург, 2021. - С. PR-96
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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7.
Инвентарный номер: нет.
   
   O-97

   
    Oxidative aromatization of 4,7-dihydro-6-nitroazolo[1,5-a] pyrimidines: synthetic possibilities and limitations, mechanism of destruction, and the theoretical and experimental substantiation / D. N. Lyapustin, E. N. Ulomsky, V. L. Rusinov [et al.] // Molecules. - 2021. - Vol. 26, № 16. - Ст. 4719
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
AZOLO[1,5-A]PYRIMIDINES -- NITRO-SYNTHONS -- OXIDATION -- OXIDATIVE DESTRUCTION -- SYNTHESIS OF HETEROCYCLES -- NITRO COMPOUNDS
Аннотация: The reaction tolerance of the multicomponent process between 3-aminoazoles, 1-morpholino-2-nitroalkenes, and aldehydes was studied. The main patterns of this reaction have been established. Conditions for the oxidation of 4,7-dihydro-6-nitroazolo[1,5-a]pyrimidines were selected. Previous claims that the 4,7-dihydro-6-nitroazolo[1,5-a]pyrimidines could not be aromatised have now been refuted. Compounds with an electron-donor substituent at position seven undergo decomposition during oxidation. The phenomenon was explained based on experimental data, electro-chemical experiment, and quantum-chemical calculation. The mechanism of oxidative degradation has been proposed.

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8.
Инвентарный номер: нет.
   

   
    Design of fluorescent sensors based on azaheterocyclic push-pull systems towards nitroaromatic explosives and related compounds: a review / E. V. Verbitskiy, G. L. Rusinov, O. N. Chupakhin, V. N. Charushin // Dyes and pigments. - 2020. - Vol. 180. - P108414
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
NITROAROMATIC EXPLOSIVES -- FLUORESCENCE QUENCHING -- PYRIDINES -- PYRAZINE -- PYRIMIDINES -- TRIAZINES
Аннотация: Highly sensitive and selective detection of nitro containing high energy organic compounds such as picric acid (PA), 2,4,6-trinitrotoluene (TNT) and 2,4-dinitrotoluene (DNT) has become a challenging task due to concerns over national security, criminal investigations and environment protections. Among various known detection methods, fluorescence sensors have gained special attention in recent time. The family of fluorescent sensors based on push-pull systems that incorporate nitrogen heterocycles as an electron-withdrawing group have a growing interest due to their high sensitivity, selectivity and easy tuning. The fluorescent sensors discussed in this review are classified and organized according to used azaheterocyclic scaffold, their functionality and their ability to detect of nitroaromatics by fluorescence quenching.

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9.
Инвентарный номер: нет.
   

    Charushin, V. N.
    Chemical elements in medicine / V. N. Charushin, Y. A. Titova, E. R. Milaeva // Herald of the Russian academy of sciences. - 2020. - Vol. 90, № 2. - P229-238
Кл.слова (ненормированные):
BETA-LACTAM ANTIBIOTICS -- BORON NEUTRON CAPTURE THERAPY -- FLUOROQUINOLONES -- HETEROCYCLES
Аннотация: A brief review of chemical elements, compounds from which find application in medicine, ranging from the commonly occurring organogenic elements (carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus), composing the structure of proteins and nucleic acids of the cells of living organisms and determining the genetic transmission, to native rarely encountered organic fluorine compounds, synthetic derivatives of which have become firmly ingrained in the arsenal of modern pharmaceutical drugs, is given. Strong emphasis is put on metalloproteins, which play a significant role in the biochemistry of vitally essential processes, as well as metal compounds that are widely used in medicine. Of particular importance are the chemical elements and the isotopes, compounds of which are employed in nuclear medicine for diagnostics and treatment of a wide range of diseases, oncological and cardiovascular in particular.

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10.
Инвентарный номер: нет.
   
   N 89

   
    Novel push-pull thieno[2,3-b]indole-based dyes for efficient dye-sensitized solar cells (DSSCs) / R. A. Irgashev, A. A. Karmatsky, G. A. Kim, G. L. Rusinov, V. N. Charushin, A. A. Sadovnikov, V. K. Ivanov, S. A. Kozyukhin, V. V. Emets, V. A. Grinberg // Arkivoc. - 2017. - Vol. 4. - P34-50
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
DYE-SENSITIZED SOLAR CELLS -- ELECTRON-RICH HETEROCYCLES -- METAL-FREE DYES -- PHOTOVOLTAIC PROPERTIES -- PUSH-PULL STRUCTURE -- THIENO[2,3-B]INDOLE
Аннотация: New metal-free sensitizers (IK 3-6), based on the thieno[2,3-b]indole ring system, bearing various aliphatic substituents at the nitrogen atom (electron-donating part), several thiophene units (π-bridge linker) and 2-cyanoacrylic acid (the electron-accepting and anchoring group) have been synthesized for application in dye-sensitized solar cells (DSSCs). The relationship between the IK dye structure and efficiency of the corresponding DSSC has been elucidated. Power conversion efficiency (PCE) up to 6.3% (short-circuit photocurrent density (JSC) 19.0 mA cm-2, open-circuit voltage (VOC) 0.59 V, and fill factor (FF) 56.4%) were obtained for the DSSC, based on 2-cyano-3-{5-[8-(2-ethylhexyl)-8H-thieno[2,3-b]indol-2-yl]thiophen-2-yl}acrylic acid (IK 3), which proved to be a highly synthetic available compound, under simulated AM 1.5 G irradiation (100 mW cm-2), thus indicating that thieno[2,3-b]indole-based organic dyes are perspective candidates for DSSCs.

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