The Experts below are selected from a list of 96 Experts worldwide ranked by ideXlab platform
Tomas Torroba - One of the best experts on this subject based on the ideXlab platform.
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Heterocyclic Chemistry of Sulfur Chlorides – Fast Ways to Complex Heterocycles
European Journal of Organic Chemistry, 2006Co-Authors: María García-valverde, Tomas TorrobaAbstract:This microreview highlights the most important advances in the synthetic applications of Sulfur dichloride and diSulfur dichloride for the preparation of heterocycles. Sulfur Chlorides can be considered some of the best Sulfur-transfer reagents for the synthesis of heterocyclic systems. Their high reactivity towards nucleophilic organic compounds such as alkenes, alkynes, amines, nitriles, oximes, and their both chlorinating and Sulfurating character explain the extensive use of these reagents. In many cases, the initial reactions give rise to reactive intermediates that can be trapped by nucleophiles in a tandem fashion, expanding the possibilities of the reactions. In this way, several new heterocyclic systems can be obtained by a careful selection of the appropriate combination of reagents. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
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heterocyclic chemistry of Sulfur Chlorides fast ways to complex heterocycles
European Journal of Organic Chemistry, 2006Co-Authors: Maria Garciavalverde, Tomas TorrobaAbstract:This microreview highlights the most important advances in the synthetic applications of Sulfur dichloride and diSulfur dichloride for the preparation of heterocycles. Sulfur Chlorides can be considered some of the best Sulfur-transfer reagents for the synthesis of heterocyclic systems. Their high reactivity towards nucleophilic organic compounds such as alkenes, alkynes, amines, nitriles, oximes, and their both chlorinating and Sulfurating character explain the extensive use of these reagents. In many cases, the initial reactions give rise to reactive intermediates that can be trapped by nucleophiles in a tandem fashion, expanding the possibilities of the reactions. In this way, several new heterocyclic systems can be obtained by a careful selection of the appropriate combination of reagents. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
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poly Sulfur nitrogen heterocycles via Sulfur Chlorides and nitrogen reagents
Journal Fur Praktische Chemie-chemiker-zeitung, 1999Co-Authors: Tomas TorrobaAbstract:The family of poly-Sulfur-nitrogen heterocycles includes highly stable aromatic compounds that display physicochemical properties with relevance in the design of new materials, especially those relating to molecular conductors and magnets. The interesting characteristics found in many of these heterocycles have led to the development of modern synthetic methods that are the subject of this review. Heterocycles such as 1,2,3- and 1,2,5-thiadiazoles, 1,2,3- and 1,3,2-dithiazoles, 1,2,3,5-dithiadiazoles, thiatriazines, trithiadiazines, dithia(and trithia)diazepines, trithiatriazepines, di-thia(and trithia)tetrazozines, and fused systems are most commonly synthesized from tetraSulfur tetranitride and organic substrates (alkynes, diazomethanes), and from sulfenyl Chlorides, Sulfur or diSulfur diChlorides and nitrogen containing reagents such as bis(trimethylsilyl)Sulfurdiimide, trimethylsilyl azide, trisilylated amidines, N-imidoylamidines, hydrazones, oximes, and amines.
Viacheslav A. Petrov - One of the best experts on this subject based on the ideXlab platform.
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reaction of fluoroolefins with Sulfur Chlorides in hydrogen fluoride boron trifluoride system
Journal of Fluorine Chemistry, 2001Co-Authors: Viacheslav A. PetrovAbstract:Abstract The reaction of tetrafluoroethylene (1), perfluorovinyl ether (3), hexafluoropropene (5), and 2-H-pentafluoropropene (7) with Sulfur Chlorides in anhydrous HF/BF3 system has been studied. The reaction with S2Cl2 at 40–100 °C produces a mixture of the corresponding di- and trisulfides along with smaller amounts of sulfenyl- and thiosulfenyl Chlorides. In case of 7 the use of BF3 catalyst results higher yields and selectivity of the process under milder conditions. The reaction of 5 and SCl2 in HF/BF3 at 100 °C is selective, gives (CF3)2CFSCl, isolated in 65% yield.
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Reaction of fluoroolefins with Sulfur Chlorides in hydrogen fluoride–boron trifluoride system
Journal of Fluorine Chemistry, 2001Co-Authors: Viacheslav A. PetrovAbstract:Abstract The reaction of tetrafluoroethylene (1), perfluorovinyl ether (3), hexafluoropropene (5), and 2-H-pentafluoropropene (7) with Sulfur Chlorides in anhydrous HF/BF3 system has been studied. The reaction with S2Cl2 at 40–100 °C produces a mixture of the corresponding di- and trisulfides along with smaller amounts of sulfenyl- and thiosulfenyl Chlorides. In case of 7 the use of BF3 catalyst results higher yields and selectivity of the process under milder conditions. The reaction of 5 and SCl2 in HF/BF3 at 100 °C is selective, gives (CF3)2CFSCl, isolated in 65% yield.
G. L. Gutsev - One of the best experts on this subject based on the ideXlab platform.
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a density functional investigation of the structure of the Sulfur Chlorides scln and scln n 1 6
The Journal of Physical Chemistry, 1992Co-Authors: G. L. GutsevAbstract:Calculations of the electronic and geometrical structure of the ground and first excited states of the title compounds are carried out within a local spin density functional approach (LSDA). Fragmentation energies, vertical electron affinities (EA), and adiabatic EAs of the neutral dulfur Chlorides as well as first ionization potentials (FIP) of the anions are evaluated. In the calculations of the EA ad and energies of fragmentation through different decay channels, the nonlocal gradient corrections to the LSDA exchange are included
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A density functional investigation of the structure of the Sulfur Chlorides (SCln and SCln- (n = 1-6))
The Journal of Physical Chemistry, 1992Co-Authors: G. L. GutsevAbstract:Calculations of the electronic and geometrical structure of the ground and first excited states of the title compounds are carried out within a local spin density functional approach (LSDA). Fragmentation energies, vertical electron affinities (EA), and adiabatic EAs of the neutral dulfur Chlorides as well as first ionization potentials (FIP) of the anions are evaluated. In the calculations of the EA ad and energies of fragmentation through different decay channels, the nonlocal gradient corrections to the LSDA exchange are included
Dalibor Jančar - One of the best experts on this subject based on the ideXlab platform.
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Study connective capabilities of solid residues from the waste incineration.
Journal of environmental management, 2018Co-Authors: V. Blahuskova, Jozef Vlček, Dalibor JančarAbstract:Currently there is increasingly closer interaction between the importance of environmental protection and efficient promoting of scientific and technological progress in the field of waste incineration. Waste is not only undesirable source of pollution, but if it is effectively used it also has great economic importance. In the Czech Republic 34.5 million tonnes of all wastes was produced in 2017, of which 5.7 million tonnes of municipal waste. 50% of the produced municipal waste was used, 38% of which was used for the material and 12% for energy utilization. 45% of municipal waste was deposited in the landfills. The method of waste incineration is among the major tools to reduce the landfill waste. The use or processing of the product which the process of incineration of municipal and hazardous waste generated can be considered as an obstacle to the favorable reception of this process. Apart from flammable components, waste also contains certain amount of dangerous particles. This is especially the Sulfur Chlorides, fluorine, PCBs and other heavy decomposable organic substances and heavy metals. This fact puts high demands on the gas cleaning processes followed by neutralization of other products that the incinerator leaves, in which these substances can be contained in higher concentrations than in the original waste. For this reason subsequent stabilization of these toxic substances is necessary to ensure new environmental burdens are avoided when not used properly. The major part of the waste combustion process is made up of ash and slag. One of the most common ways of dealing with these solid residues is disposing them to avoid creating new hazardous waste landfills. Other filtering waste also passes hazardous waste stabilization process before landfilling. Currently there is intensive search for new possibilities for utilization of solid residues from incineration. Nowadays there is emphasis on process control of their pretreatment for the production of draft procedure with its management. Appropriate procedures may minimize the instances of improper use.
Manfred Mühlstädt - One of the best experts on this subject based on the ideXlab platform.
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Zur Molekülverknüpfung mit Schwefelchloriden. VI. Die Reaktion von Dichlorsulfan mit Thiocarbamidsäureestern
Journal Fur Praktische Chemie-chemiker-zeitung, 2004Co-Authors: Manfred Mühlstädt, R. WideraAbstract:Molecule Linkage by Sulfur Chlorides. VI. The Reaction of Sulfur Dichloride with Thiocarbamic Acid Esters Sulfur dichloride reacts with thiocarbamic acid esters to form aminoacyl trisulfides. The reaction of Sulfur dichloride with unsaturated thiocarbamic acid esters yields heterocycles of the 2-thiazolidinon and 3-dithiazinon type.
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Zur Molekülverknüpfung mit Schwefelchloriden. X. Bis(arylamino‐chloralkyl)‐sulfane aus N‐β‐Methallyl‐N‐tosyl‐anilinen und Schwefeldichlorid
Journal Fur Praktische Chemie-chemiker-zeitung, 2004Co-Authors: Kerstin Hollmann, Mary Ecke, Manfred MühlstädtAbstract:Molecule Linkage by Sulfur Chlorides. X. Bis(arylamino-chloroalkyl)-sulfanes from N-β-Methallyl-N-tosyl-anilines and Sulfur Dichloride Reactions of differently substituted N-β-methallyl-N-tosyl-anilines 1 with Sulfur dichloride yield bis(arylamino-chloroalkyl)-sulfanes 2 and 3 and dihydrobenzo-1,4-thiazines 4. The structural assignment of the products 2 and 3 was carried out by mass spectroscopy and 1H-n.m.r.-spectroscopy.
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Zur Molekülverknüpfung mit Schwefelchloriden. IV. Die Addition von Dichlorsulfan an Allyl-phenyl-äther. Anti-Markovnikov-Struktur der 1:2-Addukte†
Journal Fur Praktische Chemie-chemiker-zeitung, 2004Co-Authors: Manfred Mühlstädt, Nicolas Stransky, Erich Kleinpeter, Harald MeinholdAbstract:Molecule Linkage by Sulfur Chlorides. IV. The Addition Reaction of Dichlorosulfane with Allyl-phenyl-ethers. Anti-Markovnikov-Structure of the 1:2 - Adducts Allyl-phenyl-ethers react with dichlorosulfane (Sulfur dichloride) to anti-Markovnikov-adducts. This was demonstrated by the 1H-n.m.r. spectra and dehydrohalogenation of the isolated bis-(β-chloroalkyl)-thio ethers.
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Zur Molekülverknüpfung mit Schwefelchloriden. IX. Reaktion von Schwefeldichlorid mit N-Allyl-anilinen. Eine Synthese für 2-Chlormethyl-2,3-dihydro-1,4-benzothiazine†
Journal Fur Praktische Chemie-chemiker-zeitung, 2004Co-Authors: Manfred Mühlstädt, Kerstin Hollmann, Marco ModerAbstract:Molecule Linkage by Sulfur Chlorides. IX. The Addition Reaction of Sulfur DiChlorides with N-Allyl-anilines. A Synthesis for 2-Chloromethyl-2,3-dihydrobenzo-1,4-thiazines Reactions of different substituted N-allyl-anilines 1 with Sulfur dichloride yield 2-chloromethyl-2,3-dihydrobenzo-1,4-thiazines 3a–i. The identification of the products was carried out by mass spectroscopy and 1H-n.m.r.-spectroscopy. The seven-membered cyclic isomers of the S, N-heterocycles 3, dihydro-benzo-1,5-thiazepanes 5 were not obtained.
