14094-11-2Relevant academic research and scientific papers
Photocatalytic water-soluble cationic platinum(II) complexes bearing quinolinate and phosphine ligands
Alemán, José,Cabrera, Silvia,Casado-Sánchez, Antonio,Domingo-Legarda, Pablo,Marzo, Leyre
, p. 13845 - 13857 (2020)
Cationic Pt(II) complexes ([Pt(QO/S)(PΛP)]X), having 8-oxy or 8-thioquinolinate (QO/S) and seven different mono- or bidentate phosphines as ligands, have been synthesized and characterized. The photophysical, stability, and photocatalytic properties of th
Sodium hypochlorite-promoted novel synthesis of organic ammonium tribromides and application of phenanthroline hydrotribromide in chemoselective oxidation of organic sulfides by hydrogen peroxide
Dey, Madhudeepa,Dey, Rupa R.,Dhar, Siddhartha S.
, p. 631 - 633 (2014)
A novel method of synthesis of organic ammonium tribromides (OATBs) is developed by using an inexpensive and eco-friendly sodium hypochlorite as oxidant for conversion of Br to Br3 . The OATBs thus prepared include both quaternary ammonium tribromides and N-heterocyclic tribromides. A new addition to the family of OATBs is made in the form of phenanthroline hydrotribromide. The efficacy of this new tribromide as catalyst is ascertained in the oxidative transformation of organic sulfides to their corresponding sulfoxides and sulfones by hydrogen peroxide.
Alloxazine-cyclodextrin conjugates for organocatalytic enantioselective sulfoxidations
Mojr, Viktor,Budesinsky, Milos,Cibulka, Radek,Kraus, Tomas
, p. 7318 - 7326 (2011)
Four structurally different alloxazine-cyclodextrin conjugates were prepared and tested as catalysts for the enantioselective oxidation of prochiral sulfides to sulfoxides by hydrogen peroxide in aqueous solutions. The alloxazinium unit was appended to the primary face of α- and β-cyclodextrins via a linker with variable length. A series of sulfides was used as substrates: n-alkyl methyl sulfides (n-alkyl = hexyl, octyl, decyl, dodecyl), cyclohexyl methyl sulfide, tert-butyl methyl sulfide, benzyl methyl sulfide and thioanisol. α-Cyclodextrin conjugate having alloxazinium unit attached via a short linker proved to be a suitable catalyst for oxidations of n-alkyl methyl sulfides, displaying conversions up to 98% and enantioselectivities up to 77% ee. β-Cyclodextrin conjugates were optimal catalysts for the oxidation of sulfides carrying bulkier substituents; e.g. tert-butyl methyl sulfide was oxidized with quantitative conversion and 91% ee. Low loadings (0.3-5 mol%) of the catalysts were used. No overoxidation to sulfones was observed in this study.
Mild, Selective, and Efficient Oxidation of Sulfides to Sulfoxides Catalyzed by Mn(III)-Salen Complexes
Bismuto, Alessandro,Cucciolito, Maria E.,Ruffo, Francesco,Vitagliano, Aldo,Curcio, Massimiliano
, p. 1021 - 1028 (2015)
A detailed optimization of the catalytic environment for the oxidation of sulfides promoted by Mn(salen)/H2O2 systems is proposed. The experimental setup is demonstrated to be active towards different substrates, providing TOFs up to 9300 h-1, which are among the highest reported for homogeneous catalysts employed in sulfoxidation reactions.
A nickel nanoparticle engineered CoFe2O4/SiO2-NH2@carboxamide composite as a novel scaffold for the oxidation of sulfides and oxidative coupling of thiols
Zohrevandi, Mina,Mozafari, Roya,Ghadermazi, Mohammad
, p. 14717 - 14729 (2021/05/19)
The purpose of this work was to prepare a new Ni-carboxamide complex supported on CoFe2O4 nanoparticles (CoFe2O4/SiO2-NH2@carboxamide-Ni). The carboxamide host material unit generated cavities that stabilized the nickel nanoparticles effectively and preve
Luminescent cis-Bis(bipyridyl)ruthenium(II) Complexes with 1,2-Azolylamidino Ligands: Photophysical, Electrochemical Studies, and Photocatalytic Oxidation of Thioethers
Cuéllar, Elena,Diez-Varga, Alberto,Torroba, Tomás,Domingo-Legarda, Pablo,Alemán, José,Cabrera, Silvia,Martín-Alvarez, Jose M.,Miguel, Daniel,Villafa?e, Fernando
, p. 7008 - 7022 (2021/05/29)
New 1,2-azolylamidino complexes cis-[Ru(bipy)2(NH=C(R)az*-κ2N,N)](OTf)2 (R = Me, Ph; az? = pz, indz, dmpz) are synthesized via chloride abstraction after a subsequent base-catalyzed coupling of a nitrile with the previously coordinated 1,2-azole. The synt
Chemoselective α-sulfidation of amides using sulfoxide reagents
Leypold, Mario,D'Angelo, Kyan A.,Movassaghi, Mohammad
supporting information, p. 8802 - 8807 (2020/11/03)
The direct α-sulfidation of tertiary amides using sulfoxide reagents under electrophilic amide activation conditions is described. Employing convenient and readily available reagents, selective functionalization takes place to generate isolable sulfonium
Imine-Based Covalent Organic Frameworks as Photocatalysts for Metal Free Oxidation Processes under Visible Light Conditions
Jiménez-Almarza, Alicia,López-Magano, Alberto,Marzo, Leyre,Cabrera, Silvia,Mas-Ballesté, Rubén,Alemán, José
, p. 4916 - 4922 (2019/09/10)
Photochemistry of extended polyimine COF structures with laminar, spherical and 3D architectures has been examined. We show that these materials, composed by undecorated phenyl rings and imine fragments, can act as photocatalyts in oxidative transformatio
Bovine serum albumin-cobalt(II) Schiff base complex hybrid: An efficient artificial metalloenzyme for enantioselective sulfoxidation using hydrogen peroxide
Tang, Jie,Huang, Fuping,Wei, Yi,Bian, Hedong,Zhang, Wei,Liang, Hong
, p. 8061 - 8072 (2016/06/06)
An artificial metalloenzyme (BSA-CoL) based on the incorporation of a cobalt(ii) Schiff base complex {CoL, H2L = 2,2′-[(1,2-ethanediyl)bis(nitrilopropylidyne)]bisphenol} with bovine serum albumin (BSA) has been synthesized and characterized. Attention is focused on the catalytic activity of this artificial metalloenzyme for enantioselective oxidation of a variety of sulfides with H2O2. The influences of parameters such as pH, temperature, and the concentration of catalyst and oxidant on thioanisole as a model are investigated. Under optimum conditions, BSA-CoL as a hybrid biocatalyst is efficient for the enantioselective oxidation of a series of sulfides, producing the corresponding sulfoxides with excellent conversion (up to 100%), chemoselectivity (up to 100%) and good enantiomeric purity (up to 87% ee) in certain cases.
Pt(II) coordination complexes as visible light photocatalysts for the oxidation of sulfides using batch and flow processes
Casado-Sánchez, Antonio,Gómez-Ballesteros, Rocío,Tato, Francisco,Soriano, Francisco J.,Pascual-Coca, Gustavo,Cabrera, Silvia,Alemán, José
supporting information, p. 9137 - 9140 (2016/07/21)
A new catalytic system for the photooxidation of sulfides based on Pt(ii) complexes is presented. The catalyst is capable of oxidizing a large number of sulfides containing aryl, alkyl, allyl, benzyl, as well as more complex structures such as heterocycles and methionine amino acid, with complete chemoselectivity. In addition, the first sulfur oxidation in a continuous flow process has been developed.
