2 edition of Oxidation of sulfides to sulfoxides using N-Phosphinoyloxaziridines found in the catalog.
Oxidation of sulfides to sulfoxides using N-Phosphinoyloxaziridines
Michael James Kochanewycz
Thesis (Ph.D) - University of Birmingham, School of Chemistry.
|Statement||by Michael James Kochanewycz.|
A highly efficient transition-metal-free catalytic system Br2/NaNO2/H2O has been developed for a robust and economic acid-free aerobic oxidation of sulfides. It is noteworthy that the sulfide function reacts under mild conditions without over-oxidation to sulfone. The role of NaNO2as an efficient NO equivalent for the activation of molecular oxygen was by: A magnetic supported iron (iron(II) acetylacetonate) was synthesized to be used as an efficient and recyclable heterogeneous catalyst for the selective oxidation of sulfides to corresponding sulfoxides using H 2 O 2 as a green oxidant at room synthesized Fe 3 O 4 @SiO 2-APTES(Fe(acac) 2) catalyst presented excellent sulfide conversion and good sulfoxide by:
Reaction principle. Sulfides can be very easily oxidized to sulfoxides and sulfones using many oxidizing agents, such as hydrogen peroxide, peroxides, nitric acid or sodium choice of oxidizing agent determines the outcome of the reaction. The sulfide is either fully oxidized to the sulfone or transformed into a sulfoxide. ABSTRACT. A general and metal-free catalytic oxidation of aliphatic and aromatic sulfides to their corresponding sulfoxides via combination of ammonium nitrate (NH 4 NO 3), supported ammonium hydrogen sulfate on silica gel (NH 4 HSO 4-SiO 2) and a catalytic amount of ammonium bromide (NH 4 Br) in the presence of wet SiO 2 (50%, w/w) has been investigated.
Abstract 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 sulfide, thiolane, from tetrahydrofuran and H2S in the presence of acid-base catalysts, are by: The NOOK Book (eBook) of the Modern Oxidation Methods by Jan-Erling Bäckvall at Barnes & Noble. FREE Shipping on $35 or more! Due to COVID, orders may be delayed. Oxidation of Sulfides to Sulfoxides Oxidation of Tertiary Amines to N-Oxides Concluding Remarks LIQUID PHASE OXIDATION REACTIONS CATALYZED BY POLYOXOMETALATES.
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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 Cited by: We describe an effective oxidation of diltiazem (DTZ)‐like molecules (a class of prochiral sulfides with potential pharmacological properties) using m‐chloroperbenzoic acid (MCPBA) as oxidant either in dichloromethane or methanol.
An excellent diastereomeric excess of one sulfoxide has been observed “in the absence of any chiral auxiliary”.Cited by: Oxidation of sulfides with hydrogen peroxide to sulfoxides and then sulfones was studied.
The conditions optimal for the formation of sulfoxides and sulfones were by: 4. The TMNNs is highly active in selective oxidation of sulfides to sulfoxides or sulfones by H2O2 under mild conditions due to the high specific surface area ( Oxidation of sulfides to sulfoxides using N-Phosphinoyloxaziridines book and firm structure.
In liquid-phase oxidation of sulfides and sulfoxides by air oxygen in acetone solution a high catalytic activity is shown by copper(II) phenolates containing electrodonor substituents in their benzene ring.
Reactivity of aliphatic sulfides with R=C1−C5 in sulfoxide formation is 5–10 times higher than that of petroleum sulfides. Oxidation rate of sulfides to sulfoxides is by an order of Cited by: 3. Introduction.
The selective oxidation of sulfides to sulfoxides is an important transformation in organic chemistry , , because sulfoxides are useful synthetic intermediates for the construction of various chemically and biologically active molecules , ,  and also they play key Cited by: Title:A Chemoselective Oxidation of Sulfides to Sulfoxides and Sulfones Using Urea-2,2-dihydroperoxypropane as a Novel Oxidant VOLUME: 13 ISSUE: 10 Author(s):Kaveh Khosravi, Shirin Naserifar and Atefeh Asgari Affiliation:Department of Chemistry, Faculty of Science, Arak University, Arak Keywords:Chemoselective oxidation, sulfides, sulfoxides, sulfones, Urea-2, Author: Kaveh Khosravi, Shirin Naserifar, Atefeh Asgari.
The periodate ion (IO 4 –), periodic acid (HIO 4) and their hydrated derivatives all oxidize sulfides to sulfoxides in one‐step oxygen‐transfer reactions and the relative reactivities are HIO 4 >> H 5 IO 6 > IO 4 – > H 4 IO 6 – >> H 3 IO 6 2–.Cited by: Facile and efficient oxidation of sulfides to sulfoxides in water using hypervalent iodine reagents Hirofumi Tohma, Tomohiro Maegawa, and Yasuyuki Kita* Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka, Suita, Osaka,Japan E-mail: [email protected] Sulfoxides are easily prepared by oxidation of sulfides with such reagents as sodium metaperiodate (NaIO 4) or hydrogen peroxide (H 2 O 2).Commercially, DMSO is made from air/nitric oxide-catalyzed oxidation of dimethyl sulfide, which in turn is a major by-product of the Kraft sulfate process for the manufacture of paper.
More-vigorous oxidation of sulfides or sulfoxides—as, for example. method for the oxidation of sulfides to the corresponding sulfoxides using H2O2 under mild conditions, as shown in Scheme 1. Scheme 1. Oxidation of sulfides to the corresponding sulfoxides.
R1-S-R2 R1-S-R2 r.t, acetic acid 4 equiv 30% H2O2 O R1, File Size: 38KB. Oxidation of sulfide to sulfoxide. In the first step of the reaction, the sulfur atom attacks the terminal oxygen of the peroxide group. Breakage of the peroxide bond results in the formation of an alkoxy anion and a sulfoxide protonated at the oxygen atom.
Proton exchange yields the sulfoxide and the alcohol corresponding to the peroxide. A mild, efficient, green, and selective oxidation method of sulfides to sulfoxides or sulfones using H 2 O 2 in the presence of catalytic amounts of sulfamic acid has been developed.
Various substituted sulfides having functional groups such as alcohol, ester, and aldehyde are successfully and selectively oxidized without affecting the sensitive functionalities in good to excellent Cited by: Selective catalytic oxidation of sulfides to sulfoxides using N-sulfonyloxaziridines Franklin A.
Davis, Sankar G. Lal, and H. Dupont Durst J. Org. Chem.,53 (21), pp – Selective oxidation of sulfides to sulfoxides and sulfones is achieved by H 2 O 2 using MoO 2 Cl 2 as the catalyst.
Various substituted sulfides having functional groups such as methyl, methoxy, bromo, nitro, alkene, alkyne, alcohol, ester, aldehyde and remarkably an oxime are successfully and selectively oxidized without affecting the sensitive by: Molybdatophosphoric acid as an efficient catalyst for the catalytic and chemoselective oxidation of sulfides to sulfoxides using urea hydrogen peroxide as a commercially available oxidant.
Journal of the Serbian Chemical Society75 (3), DOI: /JSCH. Donald G. by: Title:CaF2 Catalyzed Chemoselective Oxidation of Sulfides to Sulfoxides with Hydrogen Peroxide Under Solvent-Free Conditions VOLUME: 13 ISSUE: 3 Author(s):Amin Rostami, Omid Pourshiani and Sajede Gheisarzade Affiliation:Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj, Iran.
Keywords:CaF 2, catalyst, hydrogen peroxide, oxidation, selective, sulfide Cited by: 1. A green, efficient and selective approach for the oxidation of sulfides to sulfoxides and with stoichiometric amount of 30% aq.
H 2 O 2 is reported. Keywords: Heterogeneous, Hydrogen peroxide, Sulfoxidation, Selective oxidation, Vanadium. Selective oxidation of sulfides to sulfoxides by a vanadium-based catalyst using 30% hydrogen peroxide.
Selective oxidation of sulfides to sulfoxides is achieved by H2O2 using HNO3 as the promotor. Aromatic and aliphatic sulfides are oxidized to sulfoxides in excellent yields and short reaction times.
1,3,5-Triazo-2,4,6-triphosphorine-2,2,4,4,6,6-tetrachloride (TAPC) is an efficient promoter for the oxidation of sulfides and deoxygenation of sulfoxides.
Excellent yields, short reaction time, easy and quick isolation of the products, solvent-free process, and excellent chemoselectivity are the main advantages of this procedure.
Preparation. Sulfoxides are typically prepared by oxidation of sulfides, using oxidants such as hydrogen ion of thioanisole can be effected with periodate. In these oxidations, care is required to avoid over oxidation to form a sulfone. Dimethyl sulfide is oxidized to dimethyl sulfoxide and then further to dimethyl etrical sulfides are prochiral, thus their.Visible-light photocatalytic aerobic oxidation of sulfides to sulfoxides with a perylene diimide photocatalyst Visible-light photocatalytic aerobic oxidation of sulfides to sulfoxides with a perylene diimide photocatalyst Y.
Gao, books or book chapters) do not need to formally request permission to reproduce material contained in this Cited by: 2.Non-metal catalyzed asymmetric sulfide oxidation Chiral oxidants Chiral catalysts Electrochemical asymmetric sulfide oxidation Biological asymmetric sulfide oxidation Oxidation using whole cells Oxidation using isolated enzymes 3.
Kinetic Resolution of Sulfoxides Oxidative kinetic resolution.