Tag: M.W=100-150

Li, Feng; Jiang, Shanshan; Huang, Jin; Wang, Yue; Lu, Shiyu; Li, Cuiqin published the artcile< Catalytic transfer hydrogenation of furfural to furfuryl alcohol over a magnetic Fe3O4@C catalyst>, Recommanded Product: (Tetrahydrofuran-2-yl)methanol, the main research area is catalytic transfer hydrogenation furfural furfuryl alc catalyst.

Carbon-encapsulated Fe3O4 (Fe3O4@C) catalysts were prepared by a solvothermal method using glucose as the carbon source and their physicochem. properties were characterized via various anal. techniques. Catalytic transfer hydrogenation of furfural over Fe3O4@C catalysts was investigated with isopropanol as the solvent and hydrogen donor. The Fe3O4@C catalysts exhibited high catalytic furfural transfer hydrogenation activity, selectivity of furfuryl alc., and high reusability. The mechanism of catalytic transfer hydrogenation of furfural by Fe3O4@C obeys the Meerwein-Ponndorf-Verley reduction on a Lewis acid site (Fe3O4).

New Journal of Chemistrypublished new progress about Meerwein-Ponndorf-Verley reduction. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Recommanded Product: (Tetrahydrofuran-2-yl)methanol.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Harrison, Carrie-Ann; Jackson, P. Mark; Moody, Christopher J.; Williams, Jonathan M. J. published the artcile< Cyclopenta[b]indoles. Part 2. Model studies towards the tremorgenic mycotoxins>, Product Details of C8H14O2, the main research area is cyclopentaindole; tremorgenic mycotoxin cyclopentindole.

The 7-bromocyclopenta[b]indole I has been converted into the hydroxybutenyl derivatives and a tetrahydrofuranylidene derivative in model studies towards the elaboration of paspalitrem and lolitrem type side chains. In a parallel approach, the cyclopentapyrrole II was converted into the fused α-pyrone III which acted as a pyrrole-2,3-quinodimethane, and underwent Diels-Alder reaction to give, after loss of carbon dioxide, the cyclopentaindoles, e.g. IV.

Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistrypublished new progress about Indole alkaloids Role: SPN (Synthetic Preparation), PREP (Preparation). 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, Product Details of C8H14O2.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Garavagno, Maria de los A.; Hernandez, Federico J.; Jara-Toro, Rafael A.; Mahecha, Genesys; Barrera, Javier A.; Taccone, Raul A.; Pino, Gustavo A. published the artcile< Rate coefficient and mechanism of the OH-initiated degradation of cyclobutanol: A combined experimental and theoretical study>, Safety of (Tetrahydrofuran-2-yl)methanol, the main research area is cyclobutanol OH initiated degradation rate coefficient exptl theor study.

The degradation process of cyclobutanol (cButOH) by hydroxyl radical (OH), under atm. conditions, (750 ± 10) Torr of air and (296 ± 2) K, has been studied. The rate coefficient for the title reaction (k296K = (7.3 ± 0.6) x 10-12 cm3 mol.-1 s-1) was determined at 296 K by the conventional relative-rate method. Electronic structure calculations with uCCSD(T)/uBHandHLYP/aug-cc-PVDZ were conducted to study the reaction mechanism. The global rate coefficient was also calculated using the transition state theory with tunneling corrections, obtaining a value of 5.4 x 10-12 cm3 mol.-1 s-1 in agreement with the exptl. determination Addnl., reaction products identification in clean and NOx-contaminated atmospheres was performed for the first time. The identified reaction products and their corresponding yields (YP) depend on the environment composition in which the reaction is studied. In the absence of NOx, cyclobutanone (cButanone) was the only identified product, with YcButanone = (0.66 ± 0.08). In NOx-contaminated atmospheres, in addition to cButanone, THF (THF), 2-nitro-1-butanol (2N1B), 3-nitro-2-butanol (3N2B) and 2-methyl-2-nitro-1-propanol (2M2N1P), were also identified as primary reaction products. Under this condition, we were able to determine only the yields of cButanone and THF (YcButanone = 0.38 ± 0.05 and YTHF = 0.28 ± 0.02). A likely reaction mechanism for the observed products is proposed and the atm. implications are discussed.

Atmospheric Environmentpublished new progress about Alcohols, nitro Role: POL (Pollutant), OCCU (Occurrence). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Safety of (Tetrahydrofuran-2-yl)methanol.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Date, Nandan S.; Hengne, Amol M.; Huang, K.-W.; Chikate, Rajeev C.; Rode, Chandrashekhar V. published the artcile< One pot hydrogenation of furfural to 2-methyl tetrahydrofuran over supported mono- and bi-metallic catalysts>, Formula: C5H10O2, the main research area is iron nickel metallic hydrogenation catalyst furfural methyl THF.

2-Methyltetrahydrofuran is a valuable com. product that can be obtained by direct hydrogenation of furfural. In the present study, among several carbon supported bimetallic Ir-Ni catalysts with different loadings screened, 4% Ir-4% Ni/C catalyst showed excellent activity in terms of direct conversion (99%) to 2-MeTHF with a maximum selectivity of ∼74% at 220°C and 750 psig, suppressing the formation of side chain as well as ring opening products. The catalytic activity was found to be mainly affected by catalyst preparation methods, metal loadings, surface composition, temperature, pressure and catalyst loading. HR-TEM and STEM revealed well dispersed Ir-Ni NPs having the particle sizes in the range of 2 to 5 nm. Different phases of Ir i. e. Ir° and IrO2 as well as oxygen vacancies were found to be responsible for hydrogenation of furfural to 2-Me furan while, Ni° and NiO were responsible for further hydrogenation to 2-MeTHF. The synergic effect between Ir and Ni was established through XPS, H2-TPR anal. With the help of some control experiments, the plausible reaction pathway was also proposed. The catalyst prepared by co-impregnation method found more effective than prepared by sequential addition method. At lower Ni loadings of 1% and 2%, low temperature of 160°C as well as at low H2 pressure of 250 psig, mixture of furfuryl alc. and 2-Me furan were formed selectively. Catalyst could be successfully reused up to 3 times without leaching of metals.

ChemistrySelectpublished new progress about Charcoal Role: CAT (Catalyst Use), PRP (Properties), USES (Uses). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Formula: C5H10O2.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Cocq, Aurelien; Leger, Bastien; Noel, Sebastien; Bricout, Herve; Djedaini-Pilard, Florence; Tilloy, Sebastien; Monflier, Eric published the artcile< Anionic Amphiphilic Cyclodextrins Bearing Oleic Grafts for the Stabilization of Ruthenium Nanoparticles Efficient in Aqueous Catalytic Hydrogenation>, Name: (Tetrahydrofuran-2-yl)methanol, the main research area is oleic succinyl beta cyclodextrin ruthenium nanoparticle catalyst preparation; petrosource biosource unsaturated compound benzene furfural hydrogenation ruthenium catalyst.

Oleic succinyl β-cyclodextrin was proved to be efficient for the stabilization of ruthenium nanoparticles (NPs) in aqueous medium. The catalytic activity of these NPs was evaluated in the aqueous hydrogenation of petrosourced and biosourced unsaturated compounds such as benzene and furfural derivatives The catalytic system can be easily recycled and reused up to nine runs without any loss of activity and selectivity, demonstrating its robustness.

ChemCatChempublished new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Name: (Tetrahydrofuran-2-yl)methanol.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Mironenko, Roman M.; Belskaya, Olga B.; Likholobov, Vladimir A. published the artcile< Approaches to the synthesis of Pd/C catalysts with controllable activity and selectivity in hydrogenation reactions>, Application In Synthesis of 97-99-4, the main research area is review palladium carbon hydrogenation catalyst.

A review. C-supported Pd catalysts are widely used for hydrogenation of various organic compounds in the fine chem. industry. The nanoscale geometry and electronic structure of supported Pd nanoparticles play a crucial role in providing the necessary catalytic properties. To improve catalytic activity and selectivity of Pd nanoparticles, it is possible to fine tune their intrinsic properties (e.g., size and oxidation state) by controlling the chem. transformations at different stages of catalyst preparation Recent years have seen considerable advancement in developing new catalyst preparation techniques as well as in understanding the mechanism of active site formation. This review summarizes some of the existing approaches to regulating the catalytic properties of C-supported Pd by variation of the C support, the composition of Pd precursor and its reduction conditions, as well as the addition of a 2nd active metal. The data presented may be useful for researchers developing efficient Pd/C catalysts for hydrogenation of polyfunctional organic compounds

Catalysis Todaypublished new progress about Carbon nanofibers Role: CAT (Catalyst Use), NAN (Nanomaterial), PEP (Physical, Engineering or Chemical Process), PRP (Properties), TEM (Technical or Engineered Material Use), USES (Uses), PROC (Process). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Application In Synthesis of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Silva, Wesley R.; Matsubara, Elaine Y.; Rosolen, Jose M.; Donate, Paulo M.; Gunnella, Roberto published the artcile< Pd catalysts supported on different hydrophilic or hydrophobic carbonaceous substrate for furfural and 5-(hydroxymethyl)furfural hydrogenation in water>, Reference of 97-99-4, the main research area is palladium catalyst carbonaceous substrate furfural hydroxymethylfurfural hydrogenation water.

We hydrogenated furfural and 5-(hydroxymethyl)furfural (HMF) in water in a reaction catalyzed by Pd nanoparticles on carbonaceous materials with different morphol. and hydrophobic degree. The different Pd catalysts were prepared by dipping the carbonaceous material into a Pd0 micro-emulsion. The catalyst support affected the catalytic hydrogenation of furfural and HMF. By using micrometric active carbon (AC) combined with cup-stacked carbon nanotubes (CSCNTs) and Pd0/2+ nanoparticles (Pd), we obtained a micro/nanostructured material designated Pd/CSCNT-AC, which performed better than the other carbonaceous materials containing similar Pd nanoparticle loading. Pd/CSCNT-AC produced tetrahydrofurfuryl alc. from furfural with excellent selectivity (>99%). Unlike Pd on hybrophobic spheroid graphite or hydrophilic AC, Pd/CSCNT-AC hydrogenated both the C=O and C=C double bonds of furfural and catalyzed HMF hydrogenation at the C=O double bond more selectively: between 85% and 99% selectivity toward 2,5-dihydroxymethylfuran. We also investigated how temperature, hydrogen pressure, and reaction time affected HMF hydrogenation in water. Finally, Pd/CSCNT-AC was recycled several times without significant catalytic activity loss.

Molecular Catalysispublished new progress about Carbon nanotubes. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Reference of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Paraja, Miguel; Hao, Xiaoyu; Matile, Stefan published the artcile< Polyether Natural Product Inspired Cascade Cyclizations: Autocatalysis on π-Acidic Aromatic Surfaces>, Electric Literature of 97-99-4, the main research area is oligooxolane preparation; oligoepoxide preparation cascade ring opening cyclization autocatalysis kinetics; autocatalysis; cyclization; polyethers; synthetic methods; π interactions.

Anion-π catalysis functions by stabilizing anionic transition states on aromatic π surfaces, thus providing a new approach to mol. transformation. The delocalized nature of anion-π interactions suggests that they serve best in stabilizing long-distance charge displacements. Aiming therefore for an anionic cascade reaction that is as charismatic as the steroid cyclization is for conventional cation-π biocatalysis, reported here is the anion-π-catalyzed epoxide-opening ether cyclizations of oligomers. Only on π-acidic aromatic surfaces having a pos. quadrupole moment, such as hexafluorobenzene to naphthalenediimides, do these polyether cascade cyclizations proceed with exceptionally high autocatalysis (rate enhancements kauto/kcat >104 M-1). This distinctive characteristic adds complexity to reaction mechanisms (Goldilocks-type substrate concentration dependence, entropy-centered substrate destabilization) and opens intriguing perspectives for future developments.

Angewandte Chemie, International Editionpublished new progress about Autocatalysis. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Electric Literature of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Lauer, Matthew G.; Henderson, William H.; Awad, Amneh; Stambuli, James P. published the artcile< Palladium-Catalyzed Reactions of Enol Ethers: Access to Enals, Furans, and Dihydrofurans>, Name: 2,2,5,5-Tetramethyldihydrofuran-3(2H)-one, the main research area is palladium catalyzed oxidation alkyl enol ether enal furan hydrofuran.

The palladium-catalyzed oxidation of alkyl enol ethers to enals, which employs low loadings of a palladium catalyst, is described. The mild oxidation conditions tolerate a diverse array of functional groups, while allowing the formation of di-, tri-, and tetrasubstituted olefins. The application of this methodol. to intramol. reactions of alkyl enol ethers containing pendant alcs. provides furan and 2,5-dihydrofuran products.

Organic Letterspublished new progress about Acetalization. 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, Name: 2,2,5,5-Tetramethyldihydrofuran-3(2H)-one.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Liu, Wei; Yang, Yusen; Chen, Lifang; Xu, Enze; Xu, Jiaming; Hong, Song; Zhang, Xin; Wei, Min published the artcile< Atomically-ordered active sites in NiMo intermetallic compound toward low-pressure hydrodeoxygenation of furfural>, Application In Synthesis of 97-99-4, the main research area is nickel molybdenum intermetallic compound furfural hydrodeoxygenation catalyst.

Activation of oxygen-containing functional groups plays a key role in sustainable biomass upgrading and conversion. In this work, a NiMo intermetallic compound (IMC) catalyst was prepared based on layered double hydroxides (LDHs) precursors, which displayed prominent catalytic performance for furfural hydrodeoxygenation (HDO) to 2-methylfuran (2-MF) (yield: 99%) at a rather low hydrogen pressure (0.1 MPa), significantly superior to NiMo alloy, monometallic Ni and other Ni-based catalysts ever reported. CO-IR, STEM, EXAFS and XANES give direct evidences that the atomically-ordered Ni/Mo sites in NiMo IMC determine the uniform bridging-type adsorption mode of C=O bond in furfural while adsorption of furan ring is extremely suppressed. In situ FT-IR and DFT calculation further substantiate that ordered Ni-Mo bimetallic sites of IMC, in contrast to the random at. sequence in NiMo alloy, facilitate the activation and cleavage of C-OH bond in the intermediate (furfuryl alc., FOL), accounting for the production of 2-MF. This work demonstrates the decisive effect of atomically-ordered active sites in IMC catalyst on activation of oxygen-containing functional groups and product selectivity, which can be extended to catalytic upgrading of biomass-derived platform mols.

Applied Catalysis, B: Environmentalpublished new progress about Deoxidation. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Application In Synthesis of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem