5 edition of Catalytic Synthesis of Sulfides, Sulfoxides and Sulfones (Sulfur Report, Vol 10, Part 4, 1991) found in the catalog.
Catalytic Synthesis of Sulfides, Sulfoxides and Sulfones (Sulfur Report, Vol 10, Part 4, 1991)
A. V. Mashinka
by Harwood Academic Pub
Written in English
|The Physical Object|
|Number of Pages||85|
A highly efficient synthetic methodology towards the selective synthesis of sulfoxides and sulfones is reported using a cheap and green organocatalytic method. Starting from sulfides and using 2,2,2-trifluoroacetophenone as the organocatalyst and H 2 O 2 as the oxidant, the high-yielding preparation of sulfoxides or sulfones is described, being. The oxidation of sulfides to sulfoxides is the most straightforward synthetic route to the latter, and numerous reagents and oxidative procedures are available for this transformation. However, many of them cause overoxidation to the corresponsing sulfones.
Sulfoxides and aza-aromatic N-oxides were deoxygenated using a system of indium and pivaloyl chloride at room temperature to give the corresponding sulfides and aza-aromatics in high yields. E. S. Park, S. Hwan, Lee, J. H. Lee, H. J. Rhee, C. M. Yoon, Synthesis, , 2,2,2-Trifluoroacetophenone as organocatalyst enables a cheap, highly efficient, and selective synthesis of sulfoxides and sulfones starting from sulfides in the presence of H 2 O 2 as the oxidant. The selectivity depends on the reaction conditions. E. Voutyritsa, I. Triandafillidi, C. G. Kokotos, Synthesis, , 49,
A “green” highly selective oxidation of organic sulfides to the corresponding sulfoxides was developed using hydrogen peroxide and glacial acetic acid under transition metal-free and mild conditions. The oxidation procedure is very simple and the products are easily isolated in excellent yields (%). A sulfoxide is a chemical compound containing a sulfinyl (SO) functional group attached to two carbon atoms. It is a polar functional group. Sulfoxides are the oxidized derivatives of es of important sulfoxides are alliin, a precursor to the compound that gives freshly crushed garlic its aroma, and dimethyl sulfoxide (DMSO), a common solvent.
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The chapter presents progress in the synthesis of sulfides, sulfoxides, and sulfones, which comprises the method based on displacement by substitution processes, and which has been made in recent. Sulfoxides and sulfones are useful synthetic intermediates for the construction of several important organic molecules.
1 Moreover, there are many biologically important compounds containing a sulfoxide- or sulfone moiety. Sulfoxides and sulfones are generally prepared via oxidation of the corresponding sulfide; however, it is often very difficult to stop the oxidation at the sulfoxide Cited by: The present state of the synthesis of aliphatic sulfides, sulfoxides and sulfones in the presence of various catalysts is reviewed.
Details of the formation of sulfides by interaction of H 2 S with alcohols or alkenes, disproportionation of alkanethiols and of the synthesis of a cyclic sulfide, thiolane, from tetrahydrofuran and H 2 S in the presence of acid-base catalysts, Cited by: 1.
Introduction. Sulfide oxidation is one of the basic reactions in industrial organic synthesis because sulfoxides and sulfones are key intermediates for the manufacture of a wide Sulfoxides and Sulfones book of valuable additional challenge in this respect is Sulfoxides and Sulfones book make such processes environmentally friendly; since development of catalytic processes which remove the use of Cited by: A new combination system, the oxidation of sulfides using aqueous NaOCl in the presence of a catalytic amount of imide under two-phase conditions, has been developed.
The combination effectively converts various sulfides to the corresponding sulfoxides and sulfones. It was deduced that the imide could react with NaOCl to produce N-chloroimide, which would play Cited by: Sulfone selectivity = sulfone/(sulfoxide + sulfone).
Then, we studied the optimal conditions established for the selective oxidation of sulfides to sulfones: 1 mmol of substrate (DBS), the weight of SAPTPA containing mmol of TPA, 5 mL of acetonitrile, a substrate/hydrogen peroxide ratio of 35% w/v and a temperature of 70 °C.
Catalytic Synthesis Of Sulfides Sulfoxides and Sulfones. The present state of the synthesis of aliphatic sulfides, sulfoxides and sulfones in the presence of various catalysts is reviewed.
Details of the formation of sulfides by interaction of H2S with alcohols or alkenes, disproportionation of alkanethiols and of the synthesis of a cyclic. Synthesis of thiols, sulfides, sulfoxides and sulfones Synthesis of thiols, sulfides, sulfoxides and sulfones C.
Rayner, Contemp. Org. Synth.,2, Authors contributing to RSC publications (journal articles, books or book chapters) do not need to formally request permission to reproduce material contained in this article. A new dioxo-molybdenum(VI) complex [MoO 2 (L)(CH 3 OH)] has been synthesized using a tridentate ONO Schiff base ligand (H 2 L).
The X-ray crystallography showed a monoclinic space group P2 1 /c for this complex. The high catalytic activity of this Schiff base complex has been observed in the oxidation of sulfides by urea hydrogen peroxide in ethanol.
Book Editor(s): Ning Jiao. Peking University, Beijing, China the heterogeneous ones could also be used to realize the selective oxygenation of sulfide. Chiral sulfoxides are important motifs of pharmaceuticals and ligands. especially in catalytic ways. Sulfones are an important class of organic molecules due to their prominent.
To illustrate the utility of the F 8 BINOL-derived catalysts in asymmetric catalysis, we chose sulfide oxidation as a model reaction. Enantiomerically pure sulfoxides constitute an important target in asymmetric the beginning, we compared the activities of (R)-F 8 BINOL and (R)-BINOL ligands in titanium-catalyzed asymmetric oxidation of p-tolyl sulfide.
Selective oxidation of sulfides to sulfoxides and sulfones with hydrogen peroxide under organic solventfree conditions was demonstrated by the MWW-type titanosilicate zeolite catalyst. Various aromatic and aliphatic sulfides are selectively oxidized to sulfoxides and sulfones in good to excellent yields using 30% H 2 O 2 in the presence of a recyclable silica-based tungstate interphase catalyst at room temperature.
Karimi, M. Ghoreishi-Nezhad, J. Clark, Org. Lett.,7, The catalytic oxidation of thioethers is an important research field because sulfoxides and sulfones, the products of thioethers oxidation, are widely used as intermediates in the synthesis.
Evidence of Two Key Intermediates Contributing to the Selectivity of PBiomimetic Oxidation of Sulfides to Sulfoxides and Sulfones. Chemistry - An Asian Journal7 (10), DOI: /asia Xiao-Feng Wu.
A general and selective zinc-catalyzed oxidation of sulfides to sulfoxides. Various types of aromatic and aliphatic sulfides are selectively oxidized to sulfoxides and sulfones in good to excellent yields using 30% H2O2 in the presence of catalytic amounts of a novel recoverable silica-based tungstate interphase catalyst at room temperature.
The catalyst can be recovered and reused for at least eight reaction cycles under. Golchoubian, H.; Hosseinpoor, F. Effective oxidation of sulfides to sulfoxides with hydrogen peroxide under transition-metal-free conditions.
Molecules12, – [Google Scholar] Mashkina, A.V. Catalytic synthesis of sulfoxides and sulfones via oxidation of sulfides by molecular oxygen. Cat. Rev. Sci.
Eng.32, – Contemporary Organic Synthesis; Thiols, sulfides, sulfoxides, and sulfones Thiols, sulfides, sulfoxides, and sulfones C. Rayner, Contemp. Org. Synth.,1, Authors contributing to RSC publications (journal articles, books or book chapters) do not need to formally request permission to reproduce material contained in this.
Synthesis of thiols, selenols, sulfides, selenides, sulfoxides, selenoxides, sulfones and selenones. Charlotte P. Baird and Christopher M. Rayner Abstract. Covering: June to June Authors contributing to RSC publications (journal articles, books or book chapters) do not need to formally request permission to reproduce material.
The corresponding sulfoxides were obtained with high enantioselectivities (up to er) and in good yields (up to 61 %) when the mono-oxidation of the sulfides.
of sulfoxides, excluding the resolution processes. Two classes of reactions will be subsequently presented – the stoichiometric asymmetric syntheses, and the cata-lytic asymmetric syntheses. Scheme The main routes to chiral sulfoxides. 2 1 Asymmetric Synthesis of Chiral Sulfoxides.The synthesis of thiols, selenols, sulfides, selenides, sulfoxides, selenoxides, sulfones and selenones.
David J. Procter* a Author affiliations Authors contributing to RSC publications (journal articles, books or book chapters) do not need to formally request permission to reproduce material contained in this article provided that the.
Some metal-based systems have been developed to oxidize sulfides under mild conditions. Some of these systems perform as catalysts for asymmetric sulfide oxidation, and a few can utilize dioxygen as the oxidant .There are only a few reports of iron-based sulfoxidation catalysts, but all of these systems utilize Fe III centers in lieu of Fe II [41, 49, 51.