93183-64-3Relevant academic research and scientific papers
Sulfoxidation inside a hypercrosslinked microporous network nanotube catalyst
Shi, Zhaocheng,Ying, Zhong,Yang, Liusai,Meng, Xiaoyan,Wu, Lidan,Yu, Leshu,Huang, Sen,Xiong, Linfeng
supporting information, p. 1542 - 1547 (2020/02/06)
In the present work, a kind of efficient heterogeneous catalyst was synthesized from amine-functionalized hypercrosslinked bottlebrush copolymers of microporous network nanotubes (amine-MNNs) and Na2WO4. The synthesized tungstate-supported microporous network nanotubes (TMNNs) catalyst was shown to be highly active in the selective H2O2 oxidation of sulfides to sulfoxides or sulfones under mild conditions due to the high specific surface area (800 m2 g-1) and firm structure of the nanotubes. The catalyst was found to be very stable and could be recycled at least 8 times without any significant loss of activity. These results present a new opportunity for the development of efficient green organic catalytic materials with high activity.
Cu(ii) vitamin C tunes photocatalytic activity of TiO2 nanoparticles for visible light-driven aerobic oxidation of benzylic alcohols
Pourmorteza, Narges,Jafarpour, Maasoumeh,Feizpour, Fahimeh,Rezaeifard, Abdolreza
, p. 12053 - 12059 (2020/04/27)
The incorporation of Cu(OAc)2 into ascorbic acid coated TiO2 nanoparticles easily provided a new heterogeneous visible-light active titania-based photocatalyst (TiO2-AA-Cu(ii)) which was characterized by different techniques such as FT-IR, XPS, ICP-AES, TGA and TEM. A red-shift of the band-edge and a reduction of the band-gap (2.8 eV vs. 3.08 for TiO2) were demonstrated by UV-DRS and Tauc plots. The combination of the as-prepared TiO2-AA-Cu(ii) nanoparticles with TEMPO and molecular oxygen (air) afforded an active catalytic system for the selective oxidation of diverse set of benzylic alcohols under solvent-free conditions. A photoassisted pathway was confirmed for oxidation reactions evidenced by good correlation between apparent quantum yield (AQY) and diffuse reflectance spectra (DRS) of the as-prepared nanohybrid. The spectral data and recycling experiments demonstrated the structural stability of the title copper photocatalyst during oxidation reactions.
Synthetic and mechanistic investigations on manganese corrole-catalyzed oxidation of sulfides with iodobenzene diacetate
Ranburger, Davis,Willis, Ben,Kash, Benjamin,Jeddi, Haleh,Alcantar, Christian,Zhang, Rui
, p. 41 - 49 (2018/12/11)
Manganese corrole complexes catalyze the efficient oxidation of organic sulfides to sulfoxides with iodobenzene diacetate [PhI(OAc)2] as a mild oxygen source in the presence of small amounts of water. Various substituted thioanisoles can be eff
Applications of iron and nickel immobilized on hydroxyapatite-core-shell γ-Fe2O3 as a nanomagnetic catalyst for the chemoselective oxidation of sulfides to sulfoxides under solvent-free conditions
Sajjadifar, Sami,Rezayati, Sobhan,Arzehgar, Zeinab,Abbaspour, Sima,Torabi Jafroudi, Mogharab
, p. 960 - 969 (2018/03/29)
In the present study, Fe2+ and Ni2+ immobilized on hydroxyapatite-core-shell γ-Fe2O3 (γ-Fe2O3@HAp-Fe2+ and γ-Fe2O3@HAp-Ni2+) with a high surface area has been synthesized and characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM), and scanning electron microscope (SEM) techniques. Then, γ-Fe2O3@HAp-Fe2+ and γ-Fe2O3@HAp-Ni2+ were used as a new and magnetically recoverable nano catalyst for the selective oxidation of sulfides to sulfoxides with 33% aqueous H2O2 (0.5 mL) as an oxidant at room temperature in good to excellent yields and short reaction time. Nontoxicity of reagent, mild reaction condition, inexpensive and high catalytic activity, simple experimental procedure, short period of conversion and excellent yields, and ease of recovery from the reaction mixture using an external magnet are the advantages of the present method.
A Selective and Functional Group-Tolerant Ruthenium-Catalyzed Olefin Metathesis/Transfer Hydrogenation Tandem Sequence Using Formic Acid as Hydrogen Source
Zieliński, Grzegorz K.,Majtczak, Jaros?awa,Gutowski, Maciej,Grela, Karol
, p. 2542 - 2553 (2018/03/09)
A ruthenium-catalyzed transfer hydrogenation of olefins utilizing formic acid as a hydrogen donor is described. The application of commercially available alkylidene ruthenium complexes opens access to attractive C(sp3)-C(sp3) bond formation in an olefin metathesis/transfer hydrogenation sequence under tandem catalysis conditions. High chemoselectivity of the developed methodology provides a remarkable synthetic tool for the reduction of various functionalized alkenes under mild reaction conditions. The developed methodology is applied for the formal synthesis of the drugs pentoxyverine and bencyclane.
Immobilized molybdenum acetylacetonate complex on expanded starch for chemoselective oxidation of sulfides to sulfoxides with t-BuOOH at room temperature
Hong, Mei,Yan, Jun-Min
, p. 985 - 988 (2017/09/08)
We explored a highly efficient protocol for the oxidation of alkyl aryl sulfides to sulfoxides with high selectivities catalyzed by a molybdenum acetylacetonate complex immobilized on expanded corn starch (ECS-MoO2(acac)2) in the pre
An organic-inorganic hybrid supramolecular framework material based on a [P2W18O62]6- cluster and Yb & Na complexes of pyridine-2,6-dicarboxylic acid: A catalyst for selective oxidation of sulfides in water with H2O2
Reddy, Pulikanti Guruprasad,Mamidi, Narsimha,Pradeep, Chullikkattil P.
, p. 4272 - 4276 (2016/07/06)
A rare-earth-containing polyoxometalate (RECP) hybrid, {(Yb (PDCH2)2(PDCH))·Na(H2O)2·(Na(PDCH)(H2O)2)}2[P2W18O62]·14H2O (1), based on [P2W18O62]6- cluster anions and cationic Yb & Na complex units of pyridine-2,6-dicarboxylic acid (PDCH2) has been synthesized under normal reaction conditions, which exhibited a supramolecular 3-D framework structure in the crystal lattice. Hybrid 1 acts as a green catalyst for the selective oxidation of sulfides in water with H2O2 as the reagent.
SULFOXIDATION CATALYSTS AND METHODS FOR THEIR PREPARATION AND USE
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Paragraph 0054; 055, (2016/09/26)
Methods and compositions of catalysts for sulfoxidation reaction processes are disclosed. The sulfoxidation reaction process can be performed in an aqueous medium, and the catalysts can be recycled for further use. In some embodiments, a method of making a catalyst may include contacting a transition metal compound with an oxidizing agent to form a first solution, contacting a carboxylic acid compound with a cationic surfactant to form a second solution, mixing the first solution and the second solution to form a precipitate, and isolating the precipitate.
Highly efficient and chemoselective oxidation of sulfides catalyzed by iron(III) corroles with iodobenzene diacetate
Chen, Tse-Hong,Kwong, Ka Wai,Lee, Ngo Fung,Ranburger, Davis,Zhang, Rui
, p. 65 - 72 (2016/07/15)
Iron(III) corrole complexes catalyze the highly chemoselective oxidation of sulfides to sulfoxides with iodobenzene diacetate [PhI(OAc)2] as a mild oxygen source. Various substituted thioanisoles, vinyl sulfides, and hydroxyl sulfides can be ef
Dioxomolybdenum(VI) complex immobilized on ascorbic acid coated TiO2 nanoparticles catalyzed heterogeneous oxidation of olefins and sulfides
Jafarpour, Maasoumeh,Rezaeifard, Abdolreza,Ghahramaninezhad, Mahboube,Feizpour, Fahimeh
, p. 442 - 452 (2018/04/16)
Addition of MoO2 (acac)2 to TiO2 coated with ascorbic acid (AA) under ultrasonic agitation resulted in a nanohybrid (TiO2/AA/MoO2) with size ranging between 20-25 nm. The structural and morphological characterization of the as-prepared nanohybrid was carried out by different techniques such as XRD, FT-IR, TGA and transmission electron microscopy (TEM). The catalytic performance of the TiO2/AA/MoO2 nanocomplex in the heterogeneous oxidation of olefins and sulfides using H2O2 in ethanol as a safe solvent was exploited. Our results clearly demonstrated the efficiency, selectivity and oxidative stability of the heterogeneous nanocatalyst providing its effective reusability and removing by-products. The catalytic activity of the TiO2/AA/MoO2 nanocomplex was strikingly different from other nanometer sized metal oxides such as m-ZrO2, MoO3, Fe3O4 and TiO2, as well as their nanocomposites such as TiO2/AA, ZrO2/AA/MoO2, MoO3/AA/MoO2 and Fe3O4/AA/MoO2.
