In the original international version of the article, the first Project No. was specified incorrectly.

A one-pot procedure for the synthesis of isoindole-1,3-dione derivatives with functional groups based on 5-nitro-4-phenacylphthalonitriles using the Schmidt rearrangement was developed.

The primary thermolysis reactions of 1,1-diamino-2,2-dinitroethylene FOX-7 (1), one of the promising energetic materials, were studied. A number of competing reactions of the primary thermolysis step was calculated: nitro group elimination, rearrangement of the nitro group to the nitrite group, transfer of oxygen and hydrogen atoms to the neighboring carbon atom, and transfer of hydrogen atom to oxygen

The reaction of dichloromethylphenylsilane with tert-butanol in the presence of a hydrogen chloride acceptor gave tert-butoxychloromethylphenylsilane. The product is stable at room temperature for a week, undergoing disproportionation upon more prolonged storage. Its reaction with 2-substituted ethanols XCH2CH2OH (X = Cl, MeNH, PhCH2N, PhN) in the presence of bases gives the corresponding polyfunctional

A new cross-linking monomer, allyl-bis(benzocyclobuten-4-yl)methylsilane (ABCBMS), was synthesized and its physical properties were investigated. Copolymers of ABCBMS with triethylene glycol dimethacrylate (TGM-3) and bis(methacryloylethylene glycol) carbonate (BMCC-2) were obtained by photo- and thermal polymerization. The final cross-linking of the copolymers took place at 200 °C. Homo- and copolymers

For the model chemiluminescent reaction of N-octylluminol, a hydrophobic analogue of luminol and a surfactant, a scheme was established and parameters of the formal kinetic equation were calculated. The formation of intrinsic micelles of the substrate promotes a triple increaese in the rate of the first step of the luminogenous reaction and a multiple increase in the detected maximum and integrated

New high energy nitroxy and nitraza derivatives of 1-(1,1-dinitroalkyl)-2-methyl- and 1-(1,1-dinitroalkyl)-2-furazanyldiazene 1-oxides were synthesized by nitration of the corresponding hydroxy and sulfamide derivatives.

Radical polymerization of unsaturated alkoxy-NNO-azoxy compounds was explored. Polymethoxy-NNO-azoxyethene, the first energetic polymer based on alkoxy-NNO-azoxy compounds, was obtained, and its major characteristics were studied. Thermodynamic calculations show that poly(methoxy-NNO-azoxyethene) may be of interest as a polymer component of active binders for solid composite rocket propellants.

The kinetic and thermodynamic parameters of the concerted decomposition of cyclohexenes of various structures were calculated by two methods: the method of three intersecting parabolas and quantum chemical modeling (hybrid density functional theory B3LYP method and the 6–311++G** basic set). The activation energies, rate constants, and enthalpies for nine decomposition reactions were determined for

A synthetic procedure for the preparation of sterically hindered catechols and o-quinones by the reaction of catechol with cyclohexene was developed. Novel cyclohexyl substituted catechols displayed remarkable stability during redox transformations and could be used as redoxactive ligands.

According to HPLC, NMR spectroscopy, and mass spectrometry, the extracts of the knotwood of Salix capreal. contain catechin (1), 7-O-(β-d-glucopyranosyl)dihydrokaempferol (2), 7-O-(β-d-glucopyranosyl)dihydrokaempferol-4′-O-methyl ether (3), 7-O-(β-d-glucopyranosyl)naringenin (prunin) (4), naringenin (5), and dihydrokaempferide (6). Compound 3 was not described previously.

A new approach to the synthesis of 3-nitroindoles using palladium-catalyzed arylation of nitromethane with N-(2-bromoaryl)imidates was developed. A convenient and rapid method for cyclization of ethyl N-(2-nitromethylaryl)acetimidates to 2-methyl-3-nitro-1H-indoles was proposed.

In the realm of intermetallic compounds, there is a small group of phases that demonstrate the properties of non-metals. These are intermetallics formed by elements from different blocks of the periodic table, viz., transition metals on the one hand and p-block metals (or metalloids) on the other hand. The interaction between transition metal d-orbitals and p-element s- and p-orbitals leads to the

Diaryliodonium(iii) triflates were synthesized in a safe manner by the reaction of aryliodine(iii) diacetates ArI(OAc)2 with triflic acid (TfOH) in MeCN under mild exothermic conditions. This method provides access to a variety of diaryliodonium(iii) triflates, including derivatives with two different aryl substituents, with high purity.

A synthetic approach to a novel type of phosphonium and mixed phosphonium-iodonium ylides containing a conformationally fixed phosphonium fragment is developed. New representatives of these families of chemical compounds based on cyclic phenoxaphosphinine were synthesized. One compound was structurally characterized by single-crystal X-ray diffraction. Based on the 1H NMR data, one can state that phosphonium

The sorption of the actinium(iii) ions as 225,228Ac isotopes on hydroxyapatite (HAP) with various textures was studied. A “reverse” generator using an extraction chromatographic sorbent based on diglycolamide derivative (DGA Resin) was proposed for 228Ac production. The chemical yield of the product was ≥90%. The optimal acidity of the solution during sorption (pH 6–7) and the ratio of solid and liquid

A new yttrium(iii) complex with the pincer type bis(phosphinophenyl)amide ligand was synthesized and its activity and selectivity in the isoprene polymerization reaction was studied. An ultrahigh molecular weight polyisoprene with a > 99% content of 1,4-cis units was obtained.

The structures of a number of the products for the reaction of the NO donor (cation of the dinitrosyl iron complex [Fe(SC(NH2)2)2(NO)2] • Cl•H2O) with poly-N-vinylpyrrolidone in water were studied using the density functional method and QTAIM analysis. The quantum chemical calculations of the basic geometric and energy parameters of the formed compounds were performed. The expected forms of existence

An easy-to-prepare recyclable catalyst of quaternary ammonium nature and based on commercially available and inexpensive macroporous polymeric sorbent Purolite A103 resin has been devised for the carbon dioxide addition to epoxides. The catalyst can be easily separated due to its 0.6–0.85 mm bead size and recycled at least seven times. The catalyst makes it possible to carry out the reaction under

During the synthesis of new structural analogs of isothiobarbamine, the amidoalkylation of 6-hydroxy-5-isopropyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one was found to give a mixture of mono-, di-, and trisubstituted products. Possible explanations for low regioselectivity of the reaction are given.

Kinetics of the reduction of nitroxides with cysteine in the presence of a source of superoxide radicals was studied. The reactivity of nitroxides in this process is determined by the reduction potential of the N-oxoammonium cation / nitroxide pair. The rate-limiting step of the reaction is the nitroxide oxidation by the hydroperoxyl radical to the N-oxoammonium cation.

Photophysical properties and photochemical transformations of Neutral Red (NR) dye in water in the presence of cucurbit[7]uril (CB7) were studied by absorption, fluorescence, and laser kinetic spectroscopies. Phototransformations of NR involve the triplet state of the dye and the production of NR radical cations and radical anions. The formation of inclusion complexes NR@CB7 was detected. The quantum

Alkyl 2,3-dibromo-3-nitroacrylates react with arylthiols and phenols to give earlier unknown representatives of β-functionalized gem-bromonitroethenes, namely, 2-arylsulfanyl- and 2-aryloxy-3-bromo-3-nitroacrylates; their structure was characterized by IR, UV, and NMR (1H, 13C{1H}, HMQC, HMBC) spectroscopy. X-ray diffraction analysis showed that methyl 3-bromo-2-(4-chlorophenylsulfanyl)-3-nitroacrylate

Noncatalytic acetylation of methyl 2,3-di-O-benzoyl-α-d-glucopyranoside with acetic acid or acetic anhydride proceeds regioselectively at the primary hydroxyl group and affords methyl 6-O-acetyl-2,3-di-O-benzoyl-α-d-glucopyranoside in good yield. The possibility of 6-O-acetylation should be taken into account when removing a 4,6-O-benzylidene protecting group with aqueous acetic acid at elevated temperature

Bisphosphonium salt containing a 1,4-dihydroxynaphthyl-substituted moiety was synthesized in high yield by the reaction of 2-methyl-1,4-naphthoquinone with three equivalents of triphenylphosphine and hydrogen bromide. The structure of the synthesized bisphosphonium salt was determined by NMR spectroscopy and X-ray diffraction.

The reaction of 4,7-dibromo[1,2,5]thiadiazolo[3,4-d]pyridazine with alcohols and sodium alkoxides was evaluated under various conditions. Depending on the reaction conditions, either alkoxy or hydroxy derivatives of [1,2,5]thiadiazolo[3,4-d]pyridazine can be obtained. 4,7-Di-(dodecyloxy)- and 4,7-di(hexyloxy)[1,2,5]thiadiazolo[3,4-d]pyridazines, which may be of interest as the compounds exhibiting

The specific features of quaternary system phase diagram transformations induced by formation ofboundary tangential azeotrope were investigated. The characteristics of bifurcation states corresponding to the transition from one structure of the diagram to another were determined. The principal possible transformations of diagrams with varying pressure were illustrated by the systems acetone-chloroform-ethanol-water

The protolytic properties and reactions with molecular iodine and blood serum proteins of 5,7-dimethyltetrahydro-1H-imidazo[4,5-e]-1,2,4-triazine-3,6(2H,4H)-dithione and (R)-1,3-dialkyl-4-[(2-hydroxybenzylidene)amino]-5-thioxohexahydroimidazo[4,5-d]imidazol-2(1H)-ones were studied. These compounds exhibit different chemical reactivities towards molecular iodine. The binding constants between these

1-Carboxymethyl-5-halo-6-hydroxy-5-methyl-5,6-dihydrouracils and 1-carboxymethyl-6-hydroxy-5-methyl-5-mtro-5,6-dihydrouracils were synthesized for the first time by oxidative halogenation and nitration of 1-carboxymethyl-5-methyluracil. Dihydrouracil derivatives bearing a Br atom at position C(5) and a hydroxy group at position C(6) treated with Ac2O undergo deoxyhalogenation.

Electronic structures of a series oflanthanide complexes with hexafluoroisopropoxide ligands [Ln(OCH(CF3)2)2(μ2-OCH(CF3)2)(DME)]2 (Ln = Ce, Sm, Tm, Yb; DME is dimethoxyethane) were studied by quantum chemical calculations at the density functional theory (DFT) level. Intramolecular C-F→Ln interactions are present in all these compounds. A decrease in the ionic radius of lanthanide in the series from

A series of new chalcones containing an isobornyl fragment was synthesized by Claisen—Schmidt condensation of 6-acetyl-1,3-dihydroxy-4-isobornylbenzene with various benzaldehydes.

The crystals of the compounds [Na4(H2O)14CB[6]](bdc)2 · 13H2O (1) and [Na6(H2O)19CB[6]]-(bdc)3 ·15H2O (2) were obtained by heating an aqueous solution of sodium terephthalate (Na2bdc) and cucurbit[6]uril (CB[6]). According to the single-crystal X-ray diffraction data, the sodium aqua complexes and cucurbit[6]uril molecules form chains (in structure 1) and layered metal-organic frameworks (in structure

New cyanometallate cluster complexes of the composition Na8[{Re4As1.5(AsO)2.5}(CN) 12]··20.5H2O (1) and Cs7K[{Re4As2(AsO)2}(CN)12]·12H2O (2) were synthesized by high-temperature reactions of ReI3 with As and MCN (M is Na or Cs) followed by the recrystallization of the soluble products from water. The crystal structures of the synthesized compounds were studied by X-ray diffraction. An increase in the

A convenient synthesis of benzylic phosphonates and 2,3-dihydrobenzo[d][1,2]oxaphosphole 2-oxides substituted at the aromatic ring, as well as their precursors, 2-hydroxybenzylic alcohols, from the derivatives of salicylic aldehyde, salicylic acid, and 2-hydroxyacetophenone bearing an additional hydroxy or methoxy group at the para position of the aromatic ring was developed. For the first time, the

A copolymer of perfluoro-2-ethyl-2-methyldioxole and perfiuoropropyl vinyl ether was prepared by the method of high-pressure polymerization. The synthesized polymer has high optical transparency, a low refractive index, and a low material dispersion in the telecommunication wavelength ranges near 0.85, 1.3, and 1.5 µm. In addition, the polymer is predominantly amorphous and has high glass-transition

Effect of the oligomeric unsaturated polyketone (UPK) additive on the rheological properties, vulcanization, and structural characteristics of elastomeric compositions based on butadiene and nitrile-butadiene rubbers containing N-cyclohexyl-2-benzothiazolylsulfenamide (sulfenamide C) as vulcanizing accelerator is investigated. It was demonstrated using IR and NMR spectroscopy that sulfenamide C reacts

The possibility for tetra-, hexa-, octa-, and decanitrogen to exist was analyzed using the QCISD(T)/TZVP and G4 quantum chemical calculations. The results obtained suggest the existence of only four allotropes of nitrogen whose molecules contain from four to eight atoms, viz., rectangular and tetrahedral N4, open-book N6, and cubic N8. The bond lengths and bond angles were calculated for all compounds

A new monomer containing thermosetting groups of two types, namely, propargyl ether and phthalonitrile, in the structure of the molecule was synthesized and studied. It was found that thermal polymerization was accompanied by the degradation of the monomer with propargyl ether decomposition. This problem can be solved using catalysts based on Cu(i) favoring the polymerization at both the propargyl

Two novel C(7)-derivatives of natural anticancer agent colchicine were designed with the purpose to study their ability to induce tubulin clustering in cancer cells. The compounds were synthesized via amidation of N-deacetylcolchicine and Steglich esterification. The conjugate of colchicine with the guanosine derivative possesses moderate cytotoxicity to these cells (EC50 = 13.7 µmol L−1) inducing

Using the main statements of the Dubinin theory of volume filling of micropores (TVFM) the amount of adsorbed ethane was estimated at pressures up to 4 MPa in the temperature range lower and higher than the critical temperature (303–333 K) on the superactive microporous carbon adsorbent with the bimodal micropore size distribution and a total micropore volume of 1.44 cm3 g−1. Two approaches were applied

A convenient synthesis of new 8-oxa-2-azaspiro[4.5]decane from commercially available reagents based on tetrahydropyran-4-carbonitrile and 1-bromo-2-fluoroethane has been developed. This compound is promising for the production of important biologically active compounds.

The kinetics of nitrogen oxide release by binuclear dinitrosyl iron complexes (B-DNICs) with thiolate ligands based on thiophenol and its several oxy, amino, and nitro derivatives was studied using a suspension of red blood cells simulating the internal medium of a blood vessel. The NO donating ability of the complexes was estimated by the kinetic parameters of first-order equation, which described

The fast absorption of molecular oxygen by a system including styrene oxide, copper(II) chloride, and α-naphthol (strong inhibitor of oxidation) was found and studied by the volumetric method. A low value of the activation energy of oxidation and a complicated concentration dependence of the reaction rate indicate that the oxidation proceeds via the formation of a ternary system, possibly, via a complex

The effect of 2-ethyl-3-hydroxy-6-methylpyridine nitroxy succinate (1) on heart, brain, and liver tissues of experimental animals (C57/b1 mice) was studied by EPR. It was shown that compound 1, like nicorandil, increases the nitric oxide production in cells and, like mexidol, protects iron-sulfur clusters of the mitochondrial respiratory chain in heart, brain, and liver tissues of animals against oxidative

The review discusses the main methods used to obtain surface-modified quantum dots, specifically silicon, heavy metal chalcogenide and pnictide semiconductor nanoparticles. Examples of transformation processes of the grafted layer are considered. The importance of surface modification of AIIBVI- and AIIIBV-type semiconductor nanoparticles for the practical application of quantum dots is shown. It was

The data on Coronavirus spread in Russia (as a whole), Sweden, Moscow, and Yakutia were analyzed within the framework of kinetics of autocatalytic branching chain reactions. It was shown that in certain time intervals, the dynamics of this process can be described by a logistic function with a graph similar to the kinetic curve of product accumulation in a first-order autocatalytic reaction both in

A series of 2-isobornylphenol derivatives containing aminomethyl groups either at ortho-(monoderivatives) or ortho- and para-positions (bis-derivatives) relative to the hydroxy group of phenol moiety was synthesized. Antioxidant properties of the obtained compounds were comparatively evaluated using in vitro models. It was demonstrated that Mannich bases containing an n-octylaminomethyl group are significantly

Gold complexes [Ph3PR]+[Au(CN)2I2-trans]−, where R = Et (1), CH2Ph (2), Ph (3), were synthesized by the reaction of potassium dicyanodiiodoaurate with tetraorganylphosphonium chlorides in acetonitrile and were structurally characterized. The phosphorus atoms in the cations are in a tetrahedral environment. In the centrosymmetric square [Au(CN)2I2]− anions of complexes 1–3, the Au—I distances have similar

The sequential reaction of furfural with cyclic secondary amines and further with benzaldehyde and cyanoacetates affords new 2,4-dicyano-8-(R2N)-6-oxo-3-phenylbicyclo[3.2.1]-octane-2,4-dicarboxylates as rac-(1R,2R,3R,4S,5S,8R)-diastereomers. The structures of the reaction products were determined by X-ray diffraction.

The phase structure of synthetic isoprene rubber samples subjected to stretching was studied by transmission electron microscopy. A procedure for determining the fractal dimension of extended one-dimensional structures arising during deformation was proposed. Image parametrization, being the extraction of substantial acting parameters, their description, and quantitative estimation of the obtained

Methods for the synthesis of optical isomers of monoamine complexones derived from dicarboxylic amino acids and their complexes with 3d-metals are considered. The physicochemical properties of the compounds in question were studied and a number of specific properties of the complexes were revealed. An approach was proposed to the study of quantitative relationships between the chemical composition

Reactions of adamantylazoles with nucleophiles (water, carbon monoxide, acetonitrile) in sulfuric acid were studied. New bifunctional adamantane derivatives containing one heterocyclic substituent and one hydroxyl or acetamide substituent were synthesized. The coordination compounds of copper(II) and zinc(II) with 1-adamantyl-1,2,4-triazole, 4-adamantylpyrazole, and 4-adamantyl-3,5-dimethylpyrazole

An organic ligand 1-(1H-benzimidazol-1-ylmethyl)-1H-benzotriazole (bta) and two zinc complexes of the composition [Zn(bta)2Hal2] (Hal = Cl, Br) were synthesized. The crystal structure of the complex [Zn(bta)2Cl2] was determined and its features were discussed. According to X-ray diffraction data, the central atom has a tetrahedral environment composed of two nitrogen atoms from two ligand molecules

A combination of high-resolution mass spectrometry based on an orbital ion trap and 2D NMR spectroscopy was first applied to the characterization of the structure of poorly studied lignins of herbaceous plants using dioxane lignin from sedge (Cárex) as an example. Macromolecules of the Cárex lignin are found to be constructed from guaiacyl, syringyl, and p-hydroxyphenyl structural units in a ratio

The recent data (2007–2018) on the synthesis of thieno[2,3-b]pyridines are summarized and systematized.

The reaction of 5-phenylpenta-2,4-dienoic acid with benzene in CF3SO3H, depending on the reaction conditions, gives three products, namely, 5,5-diphenylpent-2-enoic acid and tetralone and indanone derivatives. These carbocyclic compounds are formed through the addition of two benzene molecules to the starting diene acid and subsequent intramolecular acylation.

The reaction of benzophenone hydrazone with chlorodiphenylphosphine in the presence of triethylamine affords the monophosphino derivative Ph2C=N-N(H)PPh2(1). The lithiation of 1 with one equivalent of MeLi produces the stable salt Ph2C=N-N(Li)PPh2, and the addition of the second equivalent of MeLi results in the lithiation of the aromatic ring of the Ph2C group followed by the cyclization to lithium-substituted

(3β,18α,19β)-3-Amino-19,28-epoxy-18α-oleanane and its acetate, which were prepared from allobetulone, were used in the one-pot synthesis of a pyridine imine palladium complex.

Novel both symmetric and asymmetric polyoxymethylene derivatives of bis(oxytriazene N -oxides) were synthesized by the nucleophilic substitution of bis(chloromethyl) ether with salts of oxytriazene N-oxides, their pharmacological properties were preliminary evaluated.

Water-soluble hybrid nanocomposites were synthesized for the first time with the use of industrial crystalline selenium (gray powder selenium) activated in a hydrazine hydrate—alkali base-recovery system. The obtained nanocomposites consist of the selenium nanoparticles 13.0–24.0 nm in size stabilized by biocompatible natural polysaccharide galactomannan. The structures of the nanocomposites were characterized