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Atom- and Step-Economical Ruthenium-Catalyzed Synthesis of Esters from Aldehydes or Ketones and Carboxylic Acids
Organic Letters. 2018. Vol. 20. No. 24. P. 7856-7859.
We developed a ruthenium-catalyzed reductive ester synthesis from aldehydes or ketones and carboxylic acids using carbon monoxide as a deoxygenative agent. Multiple factors influencing the outcome of the reaction were investigated. Best results were obtained for commercially available and inexpensive benzene ruthenium chloride; as low as 0.5 mol % of the catalyst is sufficient for efficient reaction. Competitive studies demonstrated that the presence of even 1000 equiv of alcohol in the reaction mixture does not lead to the corresponding ester, which clearly indicates that the process is not a simple reductive esterification but a novel type of Ru-catalyzed redox process.
Чудакова М. В., Functional Materials Letters 2021 Vol. 13 No. 4 P. 1-6
A series of solid solutions in the PdTe–PdBi system with general formula PdTe1−xPdTe1−xBix (x=0.33x=0.33, 0.5, 0.67) with the structure based on the NiAs type were synthesized by a high-temperature ampoule technique. These compounds, along with their parent binaries, PdTe and PdBi, were tested as promoters for the standard Co/Al2O3 catalytic system in the Fischer–Tropsch synthesis. It is shown ...
Added: February 18, 2022
Сейткалиева М. М., Вавина А. Н., Посвятенко А. et al., ACS Sustainable Chemistry & Engineering 2021 Vol. 9 No. 9 P. 3552-3570
A new family of protic ammonium ionic liquids (ILs) with various inorganic anions was synthesized from bio-derived 5-HMF. Starting with cellulose biomass, a complete preservation of the C6 unit was achieved throughout the synthetic sequence (no carbon loss). Evaluation of green metrics showed a significant advantage of the developed bio-derived pathway to access ILs from ...
Added: September 23, 2021
Makarova V. V., Gorbacheva S. N., Kostyuk A. V. et al., Journal of Energy Storage 2022 Vol. 47 Article 103595
The work is devoted to evaluation of the thermal conductivity of composites based on asphaltenes and paraffin as a phase change material. Asphaltenes with different structural characteristics, obtained by chemical modification and fractionation were used to improve the heat conductivity of paraffin. Modification of asphaltenes with sulfuric acid and oleum made it possible to obtain ...
Added: January 29, 2023
Кучеров Ф. А., Leonid V. Romashov, Аверочкин Г. М. et al., ACS Sustainable Chemistry & Engineering 2021 Vol. 9 No. 8 P. 3011-3042
Rapid development in the area of cellulose biomass conversion to furanic platform chemicals has led to expectations of their valuable practical use. Impressive research progress in this direction has resulted in several achievements but at the same time identified a key challenge—the necessity to produce aromatic compounds. In this perspective, we analyze the current stage ...
Added: September 23, 2021
Boronoev M. P., Kulikov A., Subbotina E. S. et al., Chemistry and Technology of Fuels and Oils 2017 Vol. 53 No. 3 P. 318-332
Syntheses are reported for catalysts derived from platinum and palladium nanoparticles supported on a mesoporous phenol formaldehyde polymer modified by an ionic liquid. These catalysts are used for the hydrogenation of unsaturated compounds, specifically, acyclic and cyclic isoprenoids: isoprene, 2,5 – dimethyl–2,4–hexadiene, limonene, α –terpinene, γ –terpinene, as well as phenylacetylene, transstilbene, and 1,4–diphenyl–1,3–butadiene. High ...
Added: November 19, 2019
Чудакова М. В., Максимов А. Л., Journal of the Brazilian Chemical Society 2021 Vol. 32 No. 2 P. 287-298
u-Co-containing cellulose-based carbon composite materials (Cu-Co/Cel) were formed by a matrix isolation method. Using X-ray diffraction (XRD), transmission electron microscopy (TEM), infrared-Fourier spectroscopy (IR-Fourier spectroscopy), and non-isothermal research methods, the physicochemical properties of the composites were established. The catalysts are nanosized particles distributed in a carbon matrix, containing fragments of a system of conjugated bonds ...
Added: February 18, 2022
Чудакова М. В., Molecules 2021 Vol. 26 No. 13 P. 1-11
Currently, the processes of obtaining synthetic liquid hydrocarbons and oxygenates are
very relevant. Fischer-Tropsch synthesis (FTS) is the most important step in these processes. The
products of thermal destruction in argon of the mixture [Co(NH3)6][Fe(CN)6] and Al(OH)3 were
used as catalysts for CO hydrogenation. The resulting compositions were studied using powder
X-ray diffraction, IR spectroscopy, elemental analysis, SEM micrographs. ...
Added: February 18, 2022
Тула : Саратовский государственный технический университет им. Гагарина Ю.А., 2017
В сборнике опубликованы труды участников XI Международной научно-практической конференции «Логистика и экономика ресурсосбережения и энергосбережения в промышленности» (МНПК «ЛЭРЭП-11-2017»), которая
состоялась 15 – 16 ноября 2017 г. в Тульском государственном университете.
Представленные материалы отражают результаты актуальных научно-исследовательских и опытно-конструкторских работ в области материально-технического обеспечения и складирования, логистики и экономики ресурсо- и энергосбережения в промышленности, услуг, транспорта, коммерции и информационных ...
Added: September 10, 2018
Чудакова М. В., Максимов А. Л., Petroleum Chemistry: USSR (English Translation of Neftekhimiya) 2020 Vol. 60 No. 10 P. 1129-1135
Copper-containing catalytic slurries with different concentrations of active metal precursor solutions are synthesized by drop thermolysis in situ in the hydrocarbon medium of a slurry reactor. According to dynamic light scattering, the particle size of the catalytic slurry dispersion phase is 3–4.5 nm and it remains almost unchanged during the synthesis. Using FTIR spectroscopy it ...
Added: February 18, 2022
Gorbacheva S., Borisova Y., Makarova V. et al., Molecules 2023 Vol. 28 No. 3 Article 949
The low thermal conductivity of paraffin and other organic phase change materials limits their use in thermal energy storage devices. The introduction of components with a high thermal conductivity such as graphene into these materials leads to an increase in their thermal conductivity. In this work, we studied the use of inexpensive carbon fillers containing ...
Added: January 29, 2023
Larin S., Makarova V., Gorbacheva S. et al., Journal of Chemical Physics 2022 Vol. 157 No. 19 Article 194702
Adding carbon nanoparticles into organic phase change materials (PCMs) such as paraffins is a common way to enhance its thermal conductivity and to improve the efficiency of the heat storage devices. However, sedimentation stability of such blends can be low due to aggregation of aromatic carbon nanoparticles in the aliphatic paraffin environment. In this paper ...
Added: January 29, 2023
Yanovskii L. S., Varlamova. N. I., Popov I. M. et al., Petroleum Chemistry 2020 Vol. 60 No. 1 P. 92-103
A scheme for the combined processing of coal to produce synthetic jet fuel is proposed and experimentally verified. It has been established that using an approach including coal coking followed by gasification, Fischer–Tropsch synthesis, and hydroisomerization, the resulting kerosene fractions are characterized by low density values (0.741–0.751 kg/dm3 at 20°С) relative to the level specified ...
Added: November 6, 2020
Zaichenko V. M., Knyazeva M. I., Krylova A. Y. et al., Solid Fuel Chemistry 2019 Vol. 53 No. 3 P. 159-165
The effect of mild pyrolysis methods (hydrothermal carbonization and torrefaction) on the physi-cochemical properties of biocoal was studied. It was established that biocoal obtained by hydrothermal car-bonization has a large specific surface area and exerts an exothermic effect upon decomposition; as comparedwith the samples obtained by torrefaction, it has a more dispersed structure and lower ...
Added: November 19, 2019
Onishchenko M. I., Kulikov A., Maksimov A. L., Petroleum Chemistry 2017 Vol. 57 No. 14 P. 1287-1294
The activity of supported and in situ synthesized sulfide Ni–W catalysts based on a low-siliconzeolite Y (SiO2/Al2O3 = 5.2) in the hydrocracking of vacuum gas oil is studied. It is shown that the temperature and time of reaction affect the fractional composition and the sulfur content in conversion products. Itis found that the phase of ...
Added: November 19, 2019
Shvydkiy N., Rimskiy K., Dmitry S. Perekalin, Applied Organometallic Chemistry 2023 Vol. 37 No. 3 Article e7008
The readily available cyclobutadiene platinum complex [(C4Et4)PtCl2] catalyzes hydrosilylation of alkenes and alkynes. The reaction typically proceeds at room temperature and does not require any solvent. The target products are obtained from both terminal and internal alkynes, as well as from terminal alkenes in 43−99% yields. The scope of silanes includes various tertiary silanes (Et3SiH, ...
Added: January 24, 2023
Долгопрудный : МФТИ, 2021
Труды 63-й Всероссийской научной конференции МФТИ. Включены результаты оригинальных исследований студентов, аспирантов, преподавателей и научных сотрудников МФТИ и дружественных учебных и научных организаций. Статьи представляют интерес для специалистов, работающих в области радиотехники и компьютерных технологий ...
Added: October 29, 2021
М. : РХТУ им. Д.И. Менделеева, 2020
УДК 66.01-52
ББК 24. 35
У78
Рецензент: Российский химико-технологический университет имени Д. И. Менделеева
Успехи в химии и химической технологии: сб. науч. тр. Том XXXIV, У78 № 5 (228). – М.: РХТУ им. Д. И. Менделеева, 2020. – 110 с.
В сборник вошли статьи по актуальным вопросам в области теоретической и экспериментальной химии.
Материалы сборника представлены для широкого обсуждения на XVI Международном конгрессе молодых ученых ...
Added: August 5, 2022
Trifonova E., Ankudinov N., Mikhaylov A. A. et al., Angewandte Chemie - International Edition 2018 Vol. 57 No. 26 P. 7714-7718
The rapid development of enantioselective C−H activation reactions has created a demand for new types of catalysts. Herein, we report the synthesis of a novel planar‐chiral rhodium catalyst [(C5H2tBu2CH2tBu)RhI2]2 in two steps from commercially available [(cod)RhCl]2 and tert‐butylacetylene. Pure enantiomers of the catalyst were obtained through separation of its diastereomeric adducts with natural (S)‐proline. The catalyst promoted enantioselective ...
Added: September 29, 2020
Runikhina S., Afanasyev O., Kuchuk E. et al., Chemical Science 2023 Vol. 14 P. 4346-4350
Converter gas is a large scale waste product that is usually burned to carbon dioxide and contributes to the world emission of greenhouse gases. Herein we demonstrate that instead of burning the converter gas can be used as a reducing agent in organic reactions to produce valuable pharmaceuticals and agrochemicals. In particular, amide-based selected drug ...
Added: August 11, 2023
Чудакова М. В., Kulikov A., Russian Journal of Applied Chemistry 2021 Vol. 94 No. 1 P. 104-109
The use of commercial magnetite-type iron ore and of ferriferous quartzite type ore as catalysts for low-temperature Fischer–Tropsch synthesis is described. According to the results of chemical analysis, the ores mainly contained iron magnetite, carbon, and also baddeleyite (ZrO2 + HfO2) and hatchettolite (Ta2O5 + Nb2O5 + U3O8). The ore samples with the highest iron content (48–59%) and ...
Added: February 18, 2022
Маневич В. Е., Российский химико- техногогический университет им. Менделеева, 2012
В книге представлена информация по важнейшим эксплуатационным свойствам стекол, технологии их производства, перерабготки в изделия, методам разбраковки и контроля качкства. Авторы книги являются ведущими специалистами важнейших направлений науки о стекле, промышленной технологии производства материалов и изделий из стекла. ...
Added: October 2, 2022
Trainov K., Salikov R., Luponosov Y. et al., Mendeleev Communications 2019 Vol. 29 No. 3 P. 304-306
First representatives of a novel class of compounds containing an electron-accepting hydrazonocyclopentadiene moiety, π-conjugated phenylene spacer, and electron-donating triphenylamine moiety have been synthesized. Investigation of their optical, electrochemical and photovoltaic properties revealed a high potential of the hydrazonocyclopentadiene acceptor moiety in the design of donor-acceptor compounds for organic photovoltaics. ...
Added: October 14, 2020
Mandal R., Barsu N., Garai B. et al., Chemical Communications 2021 Vol. 57 No. 91 P. 12167-12170
A new protocol is developed for the mono- and bis-ortho-C–H alkynylation of easily accessible benzamide derivatives using alkynyl bromides at room temperature by merging cobalt and photocatalysts. The diverse reactivity of various alkynyl bromides towards the C–H alkynylation and competing C–H/N–H bond annulation reactions has been demonstrated to give the corresponding products in good yields ...
Added: January 24, 2023
Möllmer J., Uhlig H., Lange M. et al., Journal of Alloys and Compounds 2021 Vol. 859 Article 157782
MgPd2 is an intermetallic compound with a reversible hydrogen uptake near ambient conditions. Hydrogenation occurs near room temperature at pressures below 0.1 MPa to form a hydrogen-rich MgPd2H0.88 phase. In this work, hydrogen sorption isotherms were measured at 283 K ≤ T ≤ 328 K as well as at a cryogenic temperature of 77 K and pressure values up ...
Added: November 5, 2020