88430-87-9Relevant academic research and scientific papers
Vanadium-catalyzed Selective Oxidation of Sulfides to Sulfoxides and Sulfones with H2O2
Chen, M.,Jia, A.-Q.,Zhang, P.-Z.,Zhang, Q.-F.,Zhou, W.-Y.
, p. 816 - 824 (2021/06/12)
Abstract: A direct selective approach to the oxidation of sulfides to sulfoxides andsulfones with H2O2 in moderate togood yields is developed. The reaction proceeds in the presence of 2 mol % ofVO(acac)2 at room temperature. All sulfoxides andsulfones were detected by gas chromatography, and the molecular structures of2-methylbenzyl 4-methylphenyl sulfone, 4-methylbenzyl 4-methylphenyl sulfone,2-bromobenzyl 4-methylphenyl sulfone, and 4-tert-butylbenzyl benzyl sulfone were determined by singlecrystal X-ray crystallography.
Epoxidation of alkenes and oxidation of sulfides catalyzed by a new binuclear vanadium bis-oxazoline complex
Javadi, Maedeh Moshref,Moghadam, Majid,Mohammadpoor-Baltork, Iraj,Tangestaninejad, Shahram,Mirkhani, Valiollah
, p. 477 - 485 (2015/02/05)
Bis(oxazoline) ligand, [2,2′-(1,3-phenylene)bis(oxazole-4,2-diyl)]-dimethanol, derived from dicyanobenzene was applied as ligand for complexation with vanadium.The catalyst was characterized by FT-IR, UV-Vis, 1H NMR spectroscopic methods, CHNS, ICP and thermal analyses, and magnetic susceptibility. The catalytic activity of this complex was then studied in the epoxidation of alkenes with TBHP (tert-butyl hydroperoxide), in acetonitrile. The effect of reaction parameters such as kind of solvent and oxygen donors was studied in the epoxidation of cyclooctene. The catalytic activity of this catalyst was also investigated in the oxidation of sulfides with H2O2 in ethanol and the corresponding sulfoxides and sulfones were produced.
Oxidation of alkenes and sulfides catalyzed by a new binuclear molybdenum bis-oxazoline complex
Moshref Javadi, Maedeh,Moghadam, Majid,Mohammadpoor-Baltork, Iraj,Tangestaninejad, Shahram,Mirkhani, Valiollah,Kargar, Hadi,Tahir, Muhammad Nawaz
, p. 19 - 26 (2014/03/21)
A novel bis(oxazoline) ligand derived from 1,3-dicyanobenzene was prepared and applied as a ligand for the preparation of a new binuclear molybdenyl complex. This ligand was characterized by UV-Vis, mass, 1H NMR, and FT-IR spectroscopic methods, thermal and elemental analysis and X-ray diffraction. The molybdenum complex was prepared by the reaction of this ligand with MoO2(acac)2. The catalyst was also characterized by FT-IR, UV-Vis, and ICP spectroscopy, elemental and thermal analysis. This catalytic system was efficiently used for the oxidation of alkenes and sulfides in the presence of TBHP. The effect of different solvents and kind of oxygen donor was also studied in the oxidation reactions.
Investigation of steric and electronic effects in the copper-catalysed asymmetric oxidation of sulfides
O'Mahony, Graham E.,Eccles, Kevin S.,Morrison, Robin E.,Ford, Alan,Lawrence, Simon E.,Maguire, Anita R.
, p. 10168 - 10184 (2013/11/06)
Steric and electronic effects in the copper-catalysed asymmetric oxidation of aryl benzyl, aryl alkyl and alkyl benzyl sulfides have been investigated. The presence of an aryl group directly attached to the sulfur is essential to afford sulfoxides with high enantioselectivities, with up to 97% ee for 2-naphthyl benzyl sulfoxide, the highest enantioselectivity achieved to date for copper-catalysed asymmetric sulfoxidation. In contrast, the benzyl substituent can be replaced by sterically comparable groups with no effect on enantioselectivity. Copper-mediated oxidation of substituted aryl benzyl sulfides display modest steric and electronic effects resulting in comparable or lower enantioselectivities to those obtained with the unsubstituted benzyl phenyl sulfide.
