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Cocrystals of polynitrogen compounds as a basis for promising energetic materials: crystal structure prediction methods, their experimental verification, and evaluation of cocrystal properties Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 N. M. Baraboshkin, V. P. Zelenov, D. V. Khakimov, A. V. Dzyabchenko, T. S. Pivina
The review concerns methods for modeling the crystal structure of polynitrogen compounds and their cocrystals. The state of the art in chemical research into (co)crystals of energetic compounds is described. Various structure modeling methods (including original ones) are considered and analyzed, and criteria for cocrystal formation at different co-former ratios are proposed. The results are discussed
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Analog of antiviral drug Triazavirin (Riamilovir) labeled with stable isotopes 13C and 15N. Synthesis and NMR characteristics Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 T. S. Shestakova, S. L. Deev, O. S. Eltsov, I. A. Khalymbadzha, V. A. Shevyrin, V. L. Rusinov, V. N. Charushin, O. N. Chupakhin
The synthesis of analog of Triazavirin (Riamilovir) enriched with isotopic 13C and 15N labels, viz. monohydrate of l-arginine salt of 5-methyl-6-nitro-7-oxo-4,7-dihydro[1,2,4]triazolo[1,5-a]pyrimidine was developed. To incorporate 13C and 15N stable isotopes into its structure, [5-13C]-3-amino-1,2,4-triazole (13C, 99%), ethyl [1,2,3,4-13C4]-acetoacetate (13C, 99%), and potassium 15N-nitrate (15N, 99%)
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Synthesis and antibacterial activity of new bis-quaternary ammonium compounds based on polyhydric alcohol Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 E. A. Saverina, N. A. Frolov, D. A. Karpeev, M. A. Bardina, E. V. Detusheva, A. N. Vereshchagin
The synthesis of bis-quaternary ammonium compounds based on a polyhydric alcohol, 2,3-bis(hydroxymethyl)butane-1,4-diol, and pyridine was accomplished. The bacteriostatic and bactericidal activity of the products against ESKAPE pathogens and Candida albicans yeast-like fungus both in planktonic and biofilm forms was studied. The activity of the bis-pyridinium salts was compared with the activities
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Hydrosilylation of ferrocene-containing alkenes and alkynes as a route to siloxane aerogels modified with ferrocene Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 L. V. Panova, M. M. Brusova, D. P. Krut’ko, D. A. Lemenovskii, M. A. Popkov, M. I. Afanasov, V. P. Dyadchenko, R. O. Burlutsky, Y. M. Panov, V. A. Ioutsi
The reaction of ferrocene-containing alkenes and alkynes with HSi(OEt)3 and HSiMe(OMe)2 in the presence of Karstedt catalyst (Pt2[(Me2SiCH=CH2)2O]3) was studied. It was found that only terminal alkenes underwent hydrosilylation, while alkynes entered this reaction even in the case of a disubstituted C≡C bond. The synthesized silicon-containing ferrocene derivatives were used as precursors for the preparation
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Effect of crystallization conditions and position of fluorine substituents on the composition and structure of {CdTb} tetrafluorobenzoate complexes Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 M. A. Shmelev, E. A. Varaksina, I. V. Taydakov, A. A. Sidorov, V. K. Ivanov, I. L. Eremenko
The reaction of the 2,3,4,5-tetrafluorobenzoate (6H-tfb) compounds [Cd(H2O)4-(6H-tfb)]n • n(6H-tfb) (1) and [Tb(H2O)2(6H-tfb)3]n (2) with 1,10-phenanthroline (phen) affords the heterometallic complex [Cd2Tb2(phen)2(6H-tfb)10] (3). The 2,3,5,6-tetra-fluorobenzoate (4H-tfb) complexes [Cd2Tb2(phen)4(4H-tfb)10]·4MeCN (4) and [Cd2Tb2(phen)2(4H-tfb)10] • 4 C6H6 (5) were obtained by reacting cadmium and terbium
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Catalytic hydroboration of carbon dioxide and cyclohexyl isocyanate with diimine zinc hydrides Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 V. G. Sokolov, A. A. Skatova, M. V. Moskalev, E. V. Baranov, I. L. Fedushkin
Reactions of generated in situ zinc hydride complexes [(dpp-bian)Zn(μ-H)]2(1) (dpp-bian is 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) and [(ArBIG-bian)ZnH] (ArBIG-bian is 1,2-bis[(2,6-dibenzhydryl-4-methylphenyl)imino]acenaphthene) with carbon dioxide in tetrahydrofuran resulted in formates [(dpp-bian)Zn(μ-OCHO)]2(2) and [(ArBIG-bian)Zn(μ-OCHO)]2(3), respectively. Paramagnetic complexes 2 and
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Searching for the synthetic methods towards siloxane molecular brushes Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 M. A. Obrezkova, A. A. Selifanova, V. K. Revenko, A. M. Muzafarov
The present review is devoted to the search for the possible methods to synthesize siloxane molecular brushes (MBs). Wide diversity of chemical nature and architectures offered by MBs become possible due to the development of state-of-the-art synthetic methods. The review provided a detailed analysis of the possible synthetic approaches to MBs, their advantages and drawbacks. The possible applications
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Synthesis of functionalized 2-diphenylphosphinoethyl-containing phosphonous and phosphinic acids Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 A. A. Prishchenko, M. V. Livantsov, O. P. Novikova, L. I. Livantsova, S. V. Baranin, Yu. N. Bubnov
A convenient synthesis of functionalized 2-diphenylphosphinoethyl-containing phosphonous and phosphinic acids has been developed. Radical addition of bis(trimethylsiloxy)-phosphine to diphenyl(vinyl)phosphine and phenyl(divinyl)phosphine proceeds regioselectively to give new 2-phosphino-substituted ethylphosphonites, the subsequent functionalization of which affords the target phosphinic acids and
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Synthesis and antimicrobial activity of new thiomonoterpene carboxylic acids Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 D. V. Sudarikov, E. V. Chashchina, A. I. Kolesnikova, D. R. Baidamshina, A. R. Kayumov, S. A. Rubtsova
A series of new compounds containing monoterpenoid fragments, sulfide and carboxy groups was synthesized. The reaction of monoterpene thiols with bromoacetic acid and ethyl 2-bromo-2,2-difluoroacetate afforded new thiomonoterpene carboxylic acids in 80–96% and 56–80% yields, respectively. The synthesized compounds were studied for antimicrobial activity. Some structure–property interrelations were
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Not all carbon—carbon bonds are equivalent: anomeric effect of sp-hybridized carbon atom Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 S. Z. Vatsadze, A. V. Medved’ko, M. Kh. Mirakbarov, M. E. Minyaev, V. N. Khrustalev, D. U. Zaripov, M. G. Medvedev, I. V. Alabugin
A possibility of manifestation of the anomeric effect of the sp-hybridized carbon atom, which is a component of triple C≡C and C≡N bonds, was studied. The effect of carbon hybridization on the acceptor capacity of the carbon—carbon σ-bonds was evaluated. A high effective electronegativity of the sp-hybridized carbon atom was found to exert a noticeable effect on the magnitude of the anomeric interactions
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Palladium carboxylate π-complexes with unsaturated hydrocarbons and the reactions catalyzed by them Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 O. N. Shishilov, S. A. Durakov, N. S. Akhmadullina, V. R. Flid
This review summarizes the studies on the palladium carboxylate π-complexes with unsaturated hydrocarbons (alkenes, alkynes, and arenes) as well as with N-heterocyclic carbenes, phosphonyl-substituted ferrocene ligands, etc. In these complexes the palladium atoms are coordinated with unsaturated hydrocarbons via the carbon atoms forming the multiple bonds. These complexes are traditional objects in
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Reaction of gossypol with thiohydrazides of oxamic acids Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 A. V. Stepanov, V. N. Yarovenko, M. M. Krayushkin
Reaction of gossypol with thiohydrazides of oxamic acids produces the corresponding hydrazones existing in the imine-imine form.
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Titanium(iv) complexes with OOO2−-type ligands as catalysts for the synthesis of ultra-high-molecular-weight polyethylene Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-03-14 V. A. Tuskaev, S. Ch. Gagieva, D. A. Kurmaev, S. K. Vishnyakova, K. F. Magomedov, M. D. Evseeva, V. N. Khrustalev, E. K. Golubev, A. O. Vikhrov, B. M. Bulychev
A new fluorine-containing OOO2−-type chelating ligand and the titanium(iv) dichloride and bis-isopropoxide complexes with this ligand were synthesized. The structure of the titanium(iv) bis-isopropoxide complex was determined by single-crystal X-ray diffraction analysis. In the presence of Al/Mg activators (Et2AlCl-Bu2Mg or Et3Al2Cl3-Bu2Mg), both complexes catalyze the ethylene polymerization giving
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Application of carbon materials in catalytic systems for the hydrogenation—dehydrogenation of liquid organic hydrogen carriers Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 A. N. Kalenchuk, V. I. Bogdan, S. F. Dunaev, L. M. Kustov
Carbon materials with different textural characteristics (active carbon, carbon nanotubes, and Sibunite) for the purposes of hydrogen generation and storage and its evolution in processes using liquid organic hydrogen carriers are compared. A combination of structural and physicochemical characteristics (surface functionalization, controlled metal—carbon interaction, and relative chemical inertness)
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Simple dyes for sensitized solar cells based on hexahydrocyclopentaindole: influence of structure on the photophysical properties of cells Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 M. S. Mikhailov, O. O. Ustimenko, N. S. Gudim, L. V. Mikhalchenko, E. A. Knyazeva, B. Kan, T. Duan, Y. Chen, O. A. Rakitin
Dyes of various structural complexity, based on the fragments of 4-(2-ethylhexyl)-1,2,3,3a,4,8b-hexahydrocyclopenta[b]indole and cyanoacrylic acid, were obtained. Solar cells sensitized with these dyes were developed, and their key photophysical characteristics were determined. The power conversion efficiency reached 4.64% for the most optimal devices based on a dye with an average structural complexity
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Electron population of Bader’s interatomic surfaces: relevance of estimates based on the electron density function values at critical points Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 I. V. Ananyev, L. L. Fershtat
The possibility to estimate the electron population of Bader’s interatomic surfaces using the electron density function values at the (3, −1) critical points is discussed taking the results of quantum chemical calculations of three model sets of isolated atomic aggregates as examples. A relevant method based on the approximation of normal distribution of the electron density over the interatomic surface
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Synthesis of polytitaniumorganosilsesquioxanes Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 V. A. Vasnev, E. N. Rodlovskaya, G. D. Markova
Polytitaniumorganosilsesquioxanes were synthesized by the hydrolysis of triethoxysilanes with octyl and vinyl groups followed by the reaction with tetrabutoxytitanium and studied.
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Reactivity of 2-aminopyridine N-oxides Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 D. M. Bystrov, L. L. Fershtat
The main aspects of the reactivity of 2-aminopyridine N-oxides and similar heterocyclic systems are discussed. Literature data are systematized based on the types of transformations considered with a focus on the major advantages and disadvantages of each synthetic method. The possibility to synthesize previously inaccessible functionally substituted and bicyclic pyridine derivatives based on selective
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Synthesis of new fluoro derivatives of o-carborane [3-F-7,8-C2B9H11]−, 3,6-F2-1,2-C2B10H10, and [6,6′-F2-3,3′-Co(1,2-C2B9H10)2]− Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 A. V. Shmalko, S. A. Anufriev, S. V. Timofeev, I. B. Sivaev, V. I. Bregadze
The 3,6-difluoro derivative of ortho-carborane 3,6-F2-1,2-C2B10H10 was obtained by a triple sequence of deboronation and BF-insertion reactions. 3-Fluoro and, especially, 3,6-difluoro derivatives of ortho-carborane were found to have an increased propensity to deboronation with elimination of the BF group under the action of even weak nucleophilic agents, which, apparently, is explained by a reduced
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Inhibitors of bacterial cystathionine γ-lyase as antibiotic synergists Part 1. Functional derivatives of 1,3,4-oxadiazole-2-carboxylic acid: synthesis and biological activity Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 A. V. Golovina, A. Z. Al’mukhametov, M. A. Kasatkina, A. R. Belik, N. D. Cherepanova, M. B. Nawrozkij, R. A. Ivanov
New structural analogs of cystathionine-γ-lyase blockers described earlier in the literature, probable synergists of antibiotics, were developed, synthesized, and studied for biological properties. According to the results of biological assays, the introduction of the 1,3,4-oxadiazole moiety into the molecules of test compounds deprives them of the target type of activity. In addition, the specified
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Aniline derivatives containing a cage monoterpenoid fragment at the nitrogen atom: synthesis and study of antibacterial properties Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 A. A. Vernigora, A. V. Davidenko, N. A. Salykin, L. L. Brunilina, D. N. Nebykov, S. N. Lavrenov, E. B. Isakova, A. S. Trenin, A. A. Nefedov, V. I. Krasnov, D. N. Polovyanenko, I. A. Novakov
New camphor and fenchon anils, promising materials for the needs of medicine and industry, as well as some of their reduced forms, were synthesized and characterized. In a number of cases, the reduction by the NaBH4—NiCl2 • 6H2O reagent system in EtOH containing water was accompanied by the formation of side products of the aromatic ring hydrogenation in up to 10–18% yields. Aniline derivatives containing
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Molecular complexes of triterpene glycosides with 5-fluorouracil sodium salt: spectral characterization and cytotoxic activity Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 N. N. Gibadullina, L. A. Yakovishin, V. I. Grishkovets, L. V. Spirikhin, V. A. Vakhitov, D. V. Ishmetova, V. A. Dokichev
Interactions of the triterpene glycosides α-hederin (1), hederasaponin C (2), and glycyrrhizic acid (GC) monoammonium salt with 5-fluorouracil (5FU) sodium salt were studied by electronic, IR, and NMR spectroscopy. The complete assignment of signals in the 13C and 19F NMR spectra in DMSO-d6 for individual compounds and their complexes in equimolar ratios was performed. The obtained spectral data indicate
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Alkynyl cyclopropanes in organic synthesis Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 V. D. Gvozdev, K. N. Shavrin, M. P. Egorov
The data on the reactions of various classes of functionalized alkynyl cyclopropanes that proceed with simultaneous participation of triple bond, three-membered ring, and functional group at a cyclopropane ring are systematized. The syntheses of polysubstituted and fused furans and indoles based on electrophile-induced and catalytic transformations of alkynyl cyclopropyl carbonyl compounds and their
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Synthesis and evaluation of the properties of fluorine-containing polyhydrazides and poly-1,3,4-oxadiazoles based on 2,5-furandicarboxylic acid Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 O. U. Smirnova, A. A. Yarosh, A. M. Sakharov
Methods for the preparation of fluorine-containing polyhydrazides and poly-1,3,4-oxadiazoles based on 2,5-furandicarboxylic acid have been developed. Properties of the resulting polymers were evaluated using GPC, TMA, TGA, and NMR spectroscopy.
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Physicochemical characteristics and antiproliferative activity of a water-soluble nanoformulation of the PtIV complex with a lonidamine-based ligand Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-28 A. A. Puchkov, N. G. Sedush, A. A. Nazarov, S. N. Chvalun
Water-soluble nanoformulation of a hydrophobic anticancer PtIV complex with a lonidamine-based ligand has been developed. Biodegradable nanocarriers (13 nm) obtained from poly(l-lactide-block-polyethylene glycol) star-shaped block copolymers were used to create the formulation. The loading of the active agent into nanoparticles was up to 3.7 wt.%, and the loading efficiency was up to 68%. It was shown
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Unusual reaction of 16α,17α-epoxypregn-5-en-20-one derivative with hydroxylamine Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-01
Abstract The reaction of hydroxylamine and steroid obtained by the condensation of 16α,17α-epoxypregn-5-en-20-one with DMF dimethyl acetal proceeded through the involvement of the epoxide fragment and led to the formation of 3β-hydroxy-4′-hydroxylaminoandrost-5-eno[16,17-b]pyridine l′-N-oxide.
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Preceramic metallocarbosilanes: synthesis, properties, thermal transformation Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-01
Abstract Ceramic-forming metallocarbosilanes {Ta(Zr)PCS and Ta(Hf)PCS} with a specified molar ratio of refractory metal atoms Ta/Zr (Ta/Hf) were synthesized by co-condensation of oligodimethylsilylenemethylenes and alkylamides of refractory metals (simultaneously Ta and Zr or Ta and Hf). The physicochemical properties of Ta(Zr)PCS and Ta(Hf)PCS were studied. It was determined that the metallocarbosilanes
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Dissociation energies of labile C—H bonds in adducts of thiyl radicals with quinoids Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-01
Abstract Dissociation energies (DC—H) of labile C—H bonds in radical adducts formed by coordination of thiyl radicals across the cyclohexadiene rings of 1,4-benzoquinone, N-phenyl-1,4-benzoquinone monoimine, and N,N′-diphenyl-1,4-benzoquinone diimine have been determined using composite methods of the Gaussian family and data on the enthalpies of formal homodesmotic reactions involving the adducts
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Fully printed polymer capacitive gas sensor for ammonia and toluene detection Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-02-01
Abstract In this work an approach for the fabrication of a fully printed polymer device applicable as a capacitive gas sensor is presented. The fabrication techniques and optimal conditions for the sequential screen printing of additive polymer layers (electrodes, interface layers, and dielectric) of a printed polymer device (capacitor) was selected and optimized. The necessary adhesion of the printed
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Synthesis of derivatives of 6-aryl-2,2′-bipyridine complexes with PtII as potential antitumor agents Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 V. M. Abramov, L. A. Cheremnykh, O. S. El’tsov, M. D. Tokhtueva, V. V. Melekhin, A. V. Paramonova, A. A. Mezentseva, A. E. Chernysheva, O. G. Makeev
New PtII complexes of aryl- and diaryl-2,2′-bipyridines were prepared using the Kröhnke method for the further synthesis of pyridine derivatives. Signal assignment in the 1H and 13C NMR spectra was performed for the 1D and 2D NMR spectral data. The primary screening evaluation of the antitumor activity of the synthesized compounds on cultured human cells in vitro showed high biological significance
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Transformations of 6-[4-(methylthio)phenyl]-3-(2-pyridyl)-1,2,4-triazines in the reaction with an aryne intermediate Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 T. D. Moseev, T. A. Idrisov, I. A. Lavrinchenko, A. P. Krinochkin, E. A. Kudryashova, D. S. Kopchuk, M. V. Varaksin, G. V. Zyryanov, V. N. Charushin, O. N. Chupakhin
Transformations of the various 6-[4-(methylthio)phenyl]-3-(2-pyridyl)-1,2,4-triazines in their reactions with an aryne intermediate were investigated. It was shown that the interaction of a 5-unsubstituted triazine with the aryne led to an S-arylation product, whereas there were no any transformations of the pyridyltriazine system. Introduction of the pentafluorophenyl substituent at the C(6) position
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Reactivity of 1,4-dichloro-3a,6a-diaza-1,4-diphosphapentalenes towards phenoxides, alkoxides, and phenols Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 V. V. Sushev, A. V. Khristolyubova, Yu. S. Panova, N. V. Zolotareva, M. D. Grishin, R. V. Rumyantcev, G. K. Fukin, A. N. Kornev
Cyclohexane-annulated 1,4-dichloro-3a,6a-diaza-1,4-diphosphapentalene reacts with lithium 2,4,6-tri-tert-butylphenolate to form exclusively diazadiphosphapentalene trans-1,4-bis-phenoxide. This reaction with reagents bearing less bulky substituents (PhOLi, ButOLi) affords a mixture of cis- and trans-1,4 isomers. The reaction of chelating phenoxides, such as disodium 3,6-di-tert-butylcatecholate and
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Optimization of the synthesis of 21-benzylidene-substituted steroids and pitfalls of the Claisen-Schmidt condensation Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 V. V. Knyazev, Yu. V. Kuznetsov, M. O. Tserfas, N. G. Kolotyrkina, I. V. Zavarzin, I. S. Levina
Data on the influence of solvents, ratios and nature of reagents on the distribution of typical impurities and yields of target products of the reaction of 19-norpregna-1,3,5(10),16-tetraen-20-one derivatives with 4-dimethylamino-, 3,4-dimethoxy-, and 4-bromobenz-aldehydes and 3-pyridinecarbaldehyde were studied and summarized. A mechanism for the formation of 1,3-diketones in the reaction of 17-acetyl-substituted
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Synthesis of dimethylaminoalkylamides of butanoic and pentanoic acids and study of their activity in the epoxy resin polymerization Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 M. A. Barabanov, V. A. Osipova, A. V. Mekhaev, O. V. Koryakova, A. V. Pestov
A number of aminoamides of butanoic and pentanoic acids were obtained by the acylation reaction of N,N-dimethylaminoalkylamines. The activity of the synthesized aminoamides in the hardening reaction of commercial epoxy resin ED-20 was studied. Based on the data of differential thermal analysis and IR Fourier spectroscopy, as well as taking into account the content of the gel fraction in the hardened
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Synthesis and anti-inflammatory activity of 4-aryl-2-[(3-cyanothiophen-2-yl)amino]-4-oxobut-2-enoates Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 Yu. O. Sharavyeva, I. A. Gorbunova, R. R. Makhmudov, D. A. Shipilovskikh, P. S. Silaichev, S. A. Shipilovskikh
4-Aryl-4-oxo-2-(thiophen-2-ylamino)but-2-enoates bearing a cyano functional group at the thiophene ring were synthesized by the reaction of the corresponding substituted 3-(thiophen-2-ylamino)-3H-furan-2-ones with primary alcohols. Evaluation of biological activity and acute toxicity of the synthesized esters revealed their pronounced anti-inflammatory effect and low toxicity.
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Hydrogen transfer from the anthracene oil of coal tar: thermal reaction with α-methylstyrene Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 A. P. Krasikova, M. G. Pervova, E. I. Andreikov, A. V. Mehaev, D. O. Antonov
The thermal reaction of the anthracene oil (AO) of coal tar with (1-methylethenyl)-benzene in the temperature range of 270–380 °C was studied. The reaction affords isopropylbenzene and ethylbenzene as products of hydrogen transfer from AO to (1-methylethenyl)-benzene, as well as condensation products of (1-methylethenyl)benzene with components of AO. Thermal reactions of (1-methylethenyl)benzene with
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Synthesis of new nido-carborane-containing 6-thiopurine derivatives Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 A. A. Telegina, D. A. Gruzdev, G. L. Levit, V. P. Krasnov
Synthesis of new nido-carborane-containing 6-thiopurines and thioguanines based on nucleophilic substitution of the chlorine atom in the specially synthesized chloroacetyl derivative of 3-amino-nido-carborane by the action of 6-thiopurine or thioguanine in the presence of sodium hydride in ethanol was developed. The resulting 6-thiopurine derivatives containing a nido-carborane moiety and unsubstituted
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Synthesis of enantiomers of 6-substituted 3-methyl-3,4-dihydro-2H-[1,4]benzoxazines Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 E. N. Chulakov, D. A. Gruzdev, M. A. Korolyova, A. A. Tumashov, M. I. Kodess, G. L. Levit, V. P. Krasnov
Individual (S)-enantiomers of 6-methoxy-, 6-chloro-, and 6-nitro-3-methyl-3,4-di-hydro-2H-[1,4]benzoxazines were synthesized via an acylative kinetic resolution of race-mates using (S)-naproxen acyl chloride as a diastereoselective chiral resolving agent. The acylation of racemic benzoxazines with (S)-naproxen acyl chloride afforded (S,S)-dia-stereomers of amides as the major products, which were isolated
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Synthesis of N-(1,2-dicarboxyethyl)chitosan Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 E. A. Veretennikova, O. V. Koryakova, A. V. Mekhaev, S. Yu. Bratskaya, A. V. Pestov
In order to prepare new ion-exchange materials, we proposed two methods for the synthesis of N-(1,2-dicarboxyethyl)chitosan from chitosan via polymer-analogous transformations: by nucleophilic addition—elimination with dimethyl ester of 2-oxosuccinic acid followed by reduction with sodium borohydride and by nucleophilic substitution with 2-bromosuccinic acid under the “synthesis in gel” conditions
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Structural features and differences for moieties of 4,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidines and 4,7-dihydro-1,2,4-triazolo[4,3-a]pyrimidines according to X-ray diffraction data Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 P. A. Slepukhin, E. S. Filatova, O. V. Fedorova, G. L. Rusinov, V. N. Charushin
The structures of substituted 6-benzyloxycarbonyl-7-(het)aryl-5-methyl-4,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidines and isomeric 6-benzyloxycarbonyl-7-aryl-5-methyl-4,7-dihydro-1,2,4-triazolo[4,3-a]pyrimidines were studied by X-ray diffraction. Distinctive structural features of these compounds were revealed.
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Development of method for synthesis of poly(N-sulfoethylaminomethylstyrene) as selective sorbent for extraction of noble metal ions Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-31 E. O. Zemlyakova, D. V. Nesterov, A. V. Mekhaev, O. V. Koryakova, I. Yu. Dolgih, Yu. S. Petrova, L. K. Neudachina, A. V. Pestov
A method for preparation of poly(N-sulfoethylaminomethylstyrene) with a degree of functionalization up to 0.54 has been developed. The composition and structure of the products of polymer analogous transformations were characterized by elemental analysis, FTIR spectroscopy, and thermogravimetric analysis. It has been established that materials with a degree of functionalization of 0.35 and 0.5 are
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Synthesis of 4-(3-azidopropoxy)phenyl glycoside of tetraarabinofuranoside related to the terminal fragment of arabinogalactan and lipoarabinomannan of mycobacteria Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-01
Abstract A convergent synthesis of tetraarabinofuranoside β-d-Araf-(1→2)-α-d-Araf-(1→3)-α-d-Araf-(1→5)-α-d-Araf-1↑OR (R is 4-(3-azidopropoxy)phenyl) related to the terminal fragment of lipoarabinomannan (LAM) and arabinogalactan of mycobacteria was developed. The synthesized tetraarabinofuranoside represents a linear motif of a branched hexaarabinofuranoside, which is the main LAM epitope. 4-(3-Azidopropoxy)phenyl
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Preparation of battery-grade LiFePO4 by the precipitation method: a review of specific features Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-01
Abstract The precipitation method is an efficient, economically feasible, and reproducible synthetic route to cathode materials for lithium-ion batteries with attractive performance characteristics, in particular, lithium iron phosphate (LiFePO4). This paper reviews the mechanisms of the key steps of the synthesis, namely, precipitation of iron phosphate FePO4 followed by its sintering with a lithium-containing
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Three-component reaction of Δ1-pyrrolines, electron-deficient acetylenes, and NH-pyrroles. Synthesis of 2-(pyrrolyl)pyrrolidinyl acrylonitriles and enones Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-01
Abstract Addition of NH-pyrroles acting as electrophiles to zwitterionic adducts of Δ1-pyrrolines and electron-deficient acetylenes (20–25 °C, 4–30 h) gave 2-(pyrrol-1-yl)pyrrolidin-1-ylacrylonitriles and 2-(pyrrol-1-yl)pyrrolidin-1-ylenones in 18–48% yields.
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Donor-acceptor complexes of main group 14 elements with α-diimines and catecholate ligands Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-01
Abstract A series of new six-coordinate silicon, germanium, and tin complexes based on 3,6-di-tert-butyl-o-benzoquinone with N-donor ligands (1,10-phenanthroline and 2,2′-bipyridine) were synthesized and structurally and spectrally characterized. According to the results of electrochemical measurements, the complexes can be oxidized or reduced (they are redox amphoteric) due to the presence of redox-active
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Three-component reaction between phenanthridine, acetylenic ketones and bis(polyfluoroalkyl) H-phosphonates: synthesis of E-N-acylethenyl-6-bis(polyfluoroalkyl)phosphoryl-5,6-dihydrophenanthridines Russ. Chem. Bull. (IF 1.7) Pub Date : 2024-01-01
Abstract A solvent-free three-component reaction between phenanthridine, acetylenic ketones, and bis(polyfluoroalkyl) H-phosphonates proceeded at room temperature for 20–24 h to stereoselectively give the corresponding E-N-acylethenyl-6-bis(polyfluoroalkyl)phosphoryl-5,6-dihydrophenanthridines in up to 82% yield.
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Synthesis of potential mimetics for dolichyl phosphates Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 A. V. Stepanov, V. V. Veselovsky
A mixture of (±)-2,3-dihydropolyprenyl monoesters of benzene-1,2,4,5-tetracarboxylic (pyromellitic) acid, which are potential mimetics for natural dolichyl phosphates, was synthesized. Semi-synthetic analogs of the latter exhibit inhibitory activity against some pathogenic human viruses.
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Synthesis, physical properties, and computational biological activity of N-{[(3(4)-halophenyl)amino]carbonothioyl}adamantane-1-carboxamides Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 Ya. P. Kuznetsov, E. S. Ilyina, G. M. Butov, I. A. Novakov
Thioureas containing halogen- and dihalogen-substituted phenyl fragments were obtained based on adamantan-1-ylcarbonyl isothiocyanate in up to 76–94% yields. The effect of the carbonyl group on the melting point, lipophilicity, and water solubility of the thioureas was established. A computational screening of biological activity was carried out, which showed that 1-(adamantan-1-ylcarbonyl)-3-(aryl)thioureas
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Catalytic amination of polychloroarenes promoted by the Buchwald ligands Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 A. A. Vasil’ev, A. A. Burukin, G. M. Zhdankina, S. G. Zlotin
Palladium-catalyzed amination of 1,2,4,5-tetrachlorobenzene with morpholine or pyrrolidine in the presence of 2-dicyclohexylphosphino-2’-(dimethylamino)biphenyl (DavePhos, the Buchwald ligand) afforded the corresponding 2,4,5-trichloroaniline derivatives in moderate yields. In the cases of hexachlorobenzene as well as other Buchwald ligands, the amination products were formed in low yields and the
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New stereoselective synthesis of 5α-androst-1-ene-3β,17β-diol Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 E. I. Chernoburova, M. A. Shchetinina, V. A. Korolev, A. I. Ilovaisky, I. V. Zavarzin
Efficient stereoselective methods for the synthesis of 5α-androst-1-ene-3β,17β-diol, which is used as a reference compound for identification of anabolic steroids and their metabolites, were elaborated. The key factor of the synthesis is the use of the sodium borohydride—cerium(III) chloride system as a reducing agent.
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Nonclassical tetracoordinate carbon in exohedral complexes of hexaprismanes X12H12Cn (X = C, Si, Ge; n = 1–3) Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 T. N. Gribanova, R. M. Minyaev, V. I. Minkin
The DFT B3LYP/6-311+G(df,p) and wB97XD/6-311+G(df,p) calculations predict the stability of exohedral complexes of hexaprismanes X12H12Cn (X = C, Si, Ge; n = 1–3) containing nonclassical carbon atoms located at the center of tetragonal faces. On going from the carbon derivatives to the silicon and germanium derivatives the configuration of bonds at the embedded carbon atoms changes from pyramidal to
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Electrochemical behavior of smooth gold in aqueous solutions of piperazine and N1,N2-dimethylethane-1,2-diamine Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 A. A. Laptev, M. D. Vedenyapina, V. V. Kuznetsov, A. S. Dmitrenok, S. A. Kulaishin
Kinetics and mechanism of anodic oxidation of an Au electrode in a weakly basic aqueous solution of secondary diaminoalkanes (N1,N2-dimethylethane-1,2-diamine and piperazine) were studied by cyclic voltammetry and gravimetry. It was found using scanning and transmission electron microscopy that the oxidation products of the Au anode under galvanostatic conditions are reduced on the steel cathode with
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Synthesis and EPR study of highly stable trityl-nitroxide biradicals Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 N. B. Asanbaeva, O. Yu. Rogozhnikova, V. M. Tormyshev, D. A. Morozov, Yu. F. Polienko, I. F. Zhurko, A. M. Genaev, E. G. Bagryanskaya
Highly stable trityl-nitroxide biradicals were synthesized, which are promising for the use as polarizing agents for dynamic nuclear polarization (DNP) in reducing environments, such as living cells. The EPR spectra of the biradicals were studied, parameters of hyperfine and exchange interactions were obtained, and the dipole—dipole interaction values were estimated using the results of conformational
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Synthesis and structure of two-dimensional coordination polymer based on 2,2′-bithiophene-5,5′-dicarboxylic acid Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 V. A. Dubskikh, A. A. Lysova, D. G. Samsonenko, K. A. Kovalenko, D. N. Dybtsev, V. P. Fedin
A new metal-organic framework (MOF) [Co3(btdc)3(5,5′-dmbpy)2] • 5DMF (1) (H2btdc is 2,2′-bithiophene-5,5′-dicarboxylic acid and 5,5′-dmbpy is 5,5′-dimethyl-2,2′-bipyridyl) was synthesized. Compound 1 contains trinuclear secondary building blocks connected to each other by the btdc2− ligand to form a layered coordination polymer with a free accessible volume of 36%.
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Scandium and neodymium dichloride complexes supported by amido-imino ligands: synthesis, structure, reactivity, and catalytic activity in isoprene polymerization Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 A. O. Tolpygin, A. D. Mikhailychev, T. A. Kovylina, K. A. Kozhanov, A. V. Cherkasov, A. A. Trifonov
The exchange reaction of equimolar amounts of the potassium radical anion salt of diazabutadiene [DADMe•−K(THF)n] (1) (DADMe = DippNC(Me)C(Me)NDipp; Dipp = = 2,6-Pri2C6H3) with anhydrous ScCl3 and NdCl3 afforded the dichloride complexes [DippN=C(Me)C(=CH2)NDipp]LnCl2(THF)2 (Ln = Sc (3), Nd (4)) in 75% and 71% yields, respectively. In these complexes, the DADMe ligand exists in the monoanionic amido-imino
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(Difluoroamino)furazans Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 B. I. Ugrak, T. K. Shkineva, A. B. Sheremetev, I. L. Dalinger
3-Amino-4-R-furazans can be converted into the corresponding 3-difluoroamino-4-R-furazans by fluorination with a fluorine—argon mixture under both liquid-phase and solid-phase conditions. Fluorinations can be enabled in the presence of both electron-donating and electron-withdrawing substituents R; some substituents R underwent transformations under fluorination conditions.
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Formation of Ptδ+/Pt0 active sites on Ni-Cr composites supported on carbon carrier in bicyclohexyl dehydrogenation Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 T. V. Bogdan, A. N. Kalenchuk, A. E. Koklin, V. I. Bogdan
The activity of Pt/C, Pt/Ni/C, Pt/Cr/C, and Pt-Ni-Cr/C catalysts in the dehydrogenation reaction of bicyclohexyl, a step of hydrogen release in chemical hydrogen storage systems, was studied. The catalyst surface structure was investigated by transmission electron microscopy. The charge state of platinum was assessed by XPS. The role of nickel and chromium promoters in the formation of electron-deficient
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Synthesis of a spacer-armed disaccharide structurally related to the M antigenic fragment of Brucella O-polysaccharides Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 Yu. E. Tsvetkov, N. E. Nifantiev
3-Aminopropyl-4,6-dideoxy-4-formamido-α-d-mannopyranosyl-(1→3)-4,6-dideoxy-4-formamido-α-d-mannopyranoside, a disaccharide structurally related to the M antigenic fragment of Brucella O-polysaccharides, was synthesized starting from 1,2,3-tri-O-acetyl-4-azido-4,6-dideoxy- and 1,3-di-O-acetyl-4-azido-2-O-benzyl-4,6-dideoxy-α-d-mannopyranoses.
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Standard enthalpies of formation of para-substituted aromatic nitroso oxides Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 S. L. Khursan, R. L. Safiullin
Gas-phase standard enthalpies of formation (ΔfH°) of cis- and trans-isomers of fourteen para-substituted aromatic nitroso oxides ArNOO were estimated using the G4 composite method and a comparative analysis of thermochemical characteristics of reference compounds. It was found that the differences between the enthalpies of ArNOO and isomeric nitro compounds ArNO2 obtained from the G4 calculations are
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Phosphonium salts based on 2H-imidazole: synthesis by direct C–H functionalization of imidazole N-oxides Russ. Chem. Bull. (IF 1.7) Pub Date : 2023-12-29 A. A. Akulov, A. A. Pershin, A. A. Deleva, M. V. Varaksin, V. N. Charushin, O. N. Chupakhin
A convenient approach towards previously unknown phosphonium salts containing a non-aromatic 2H-imidazole moiety is reported. The approach is based on a direct nucleophilic C(sp2)-H functionalization of 2H-imidazole 1-oxides with triphenylphosphine acting as a nucleophile. Herewith, the heterocyclic N-oxide moiety is utilized as an auxiliary group contributing to an abstraction of C-H proton during