Tag: M.W=100-150

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>, Product Details of 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.

ChemistrySelect published 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, Product Details of C5H10O2.

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

Wu, Zhi-Lei; Wang, Jian; Wang, Shuo; Zhang, Ya-Xin; Bai, Guo-Yi; Ricardez-Sandoval, Luis; Wang, Gui-Chang; Zhao, Bin published the artcile< Controllable chemoselective hydrogenation of furfural by PdAg/C bimetallic catalysts under ambient operating conditions: an interesting Ag switch>, Category: tetrahydrofurans, the main research area is chemoselective hydrogenation furfural PdAg carbon bimetallic catalyst.

Hydrogenation of furfural to value-added chem. products is largely hindered by its multiple reaction pathways and complicated product distribution. Thus, to selectively achieve the desired products, catalysts with precise catalytic properties are highly required. Herein, a series of PdAg bimetallic nanoparticles (NPs) of similar size and tunable composition supported on activated carbon (Pd4Ag1/C, Pd2Ag1/C, Pd1Ag1/C and Pd2Ag3/C) were synthesized in a controlled manner and applied in the selective hydrogenation of furfural. Interestingly, an obvious composition-dependent catalytic performance was observed: upon incrementally increasing the proportion of Ag in PdAg NPs, the hydrogenation selectivity can transform from tetrahydrofurfuryl alc. (sel. 94% for Pd4Ag1/C) to furfuryl alc. (sel. 95% for Pd1Ag1/C) with nearly complete conversion (99%) of furfural. DFT calculations revealed that the adsorption free energy of in situ generated furfuryl alc. on Pd(111) surface is inversely proportional correlated with the Ag content in PdAg bimetallic NPs, which accounts for the alteration of chemoselectivity. Importantly, the present study is the first demonstration of composition-induced selectivity reversal for the hydrogenation of furfural under ambient conditions (25°C, 0.1 MPa H2).

Green Chemistry published new progress about Hydrogenation, chemoselective. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Category: tetrahydrofurans.

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

Bennett, Gregory B.; Houlihan, William J.; Mason, Robert B.; Engstrom, Robert G. published the artcile< Synthesis and biological evaluation of substituted 2,2'-oxybis(propionic acid) derivatives and related compounds>, Application In Synthesis of 5455-94-7, the main research area is hypolipidemic oxybispropionic acid derivative; propionic acid derivative hypolipidemic; furan derivative hypolipidemic.

A series of 2,2′-oxybis(propionic acid) derivatives, cyclic imides, and other analogs was prepared and hypolipidemic activity measured. The lipid-lowering activity of various 2,2,5,5-tetrasubstituted furan derivatives was also measured. No significant hypolipidemic activity was observed Structure-activity relationships are discussed.

Journal of Medicinal Chemistry published new progress about Lipids Role: BIOL (Biological Study). 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, Application In Synthesis of 5455-94-7.

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 of C5H10O2, 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: Environmental published new progress about Deoxidation. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Application of C5H10O2.

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

Ruan, Luna; Zhang, Huan; Zhou, Man; Zhu, Lihua; Pei, An; Wang, Jiexiang; Yang, Kai; Zhang, Chuanqun; Xiao, Suqun; Chen, Bing Hui published the artcile< A highly selective and efficient Pd/Ni/Ni(OH)2/C catalyst for furfural hydrogenation at low temperatures>, Recommanded Product: (Tetrahydrofuran-2-yl)methanol, the main research area is furfural hydrogenation nickel palladium carbon nanocatalyst furfuryl alc.

Hydrogenation of furfural (FF) produces a train of products such as furfuryl alc. (FFA), tetrahydrofurfuryl alc. (THFFA) and 2-methylfuran (2-MF). The Pd/Ni/Ni(OH)2/C nanocatalyst was successfully prepared under mild conditions by hydrazine hydrate reduction and galvanic replacement methods. Pd/Ni/Ni(OH)2/C had much higher conversion of furfural and selectivity toward furfuryl alc. for the selective hydrogenation of furfural than the monometallic catalysts (eg. Pd/C or Ni/C) due to its unique nanostructure of palladium island-on-Ni/Ni(OH)2 nanoparticles and thus the synergy effect between Pd, Ni and Ni(OH)2 related species. The proposed mechanism of the synergistic effect was also provided. Pd/Ni/Ni(OH)2/C showed high selectivity (90.0% or 92.4%) to furfuryl alc. at quite low reaction temperatures (5°C or 10°C), and had good stability. We used various characterization techniques (XRD, HRTEM, STEM-EDS elemental mapping and line-scanning, XPS, HS-LEIS) to compare the nanostructural differences between the monometallic and bimetallic catalysts as well as to explain the possible reasons for the superior performance of Pd/Ni/Ni(OH)2/C to corresponding monometallic catalysts.

Molecular Catalysis published new progress about Hydrogenation. 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

Weerachawanasak, Patcharaporn; Krawmanee, Pacharaporn; Inkamhaeng, Weerachat; Cadete Santos Aires, Francisco J.; Sooknoi, Tawan; Panpranot, Joongjai published the artcile< Development of bimetallic Ni-Cu/SiO2 catalysts for liquid phase selective hydrogenation of furfural to furfuryl alcohol>, Name: (Tetrahydrofuran-2-yl)methanol, the main research area is development bimetallic nickel copper SiO2 catalyst liquid hydrogenation furfural.

Bimetallic Ni-Cu/SiO2 catalysts with different Cu loading (2-5 wt%) were developed for liquid phase selective hydrogenation of furfural to furfuryl alc. Among these, bimetallic 2%Ni-X%Cu/SiO2 (X = 2, 5) catalysts exhibited better catalytic performances than monometallic 2%Ni/SiO2 and 2%Cu/SiO2. Moreover, the bimetallic 2%Ni-5%Cu/SiO2 catalyst showed the best catalytic performance with 94% of furfural conversion and 64% of furfuryl alc. selectivity. The synergetic effect of NiCu alloy particles that are present on bimetallic Ni-Cu/SiO2 catalysts change the adsorption configuration of furfural on the catalyst surface resulting in high catalytic performance in liquid phase selective hydrogenation of furfural to furfuryl alc.

Catalysis Communications published new progress about Hydrogenation catalysts. 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

Wappes, Ethan A.; Vanitcha, Avassaya; Nagib, David A. published the artcile< β C-H di-halogenation via iterative hydrogen atom transfer>, Name: 2,2,5,5-Tetramethyldihydrofuran-3(2H)-one, the main research area is geminal dihalide regioselective preparation; imidate preparation photochem tandem dihalogenation hydrogen transfer.

A radical relay strategy for mono- and di-halogenation (iodination, bromination, and chlorination) of sp3 C-H bonds was developed. This is the first example of β C-H di-halogenation is achieved through sequential C-H abstraction by iterative, hydrogen atom transfer (HAT). A double C-H functionalization was enabled by in-situ generated imidate radicals, which facilitate selective N to C radical translocation and tunable C-X termination. The versatile, geminal di-iodide products were further elaborated to β ketones and vinyl iodides. Mechanistic experiments explained the unique di-functionalization selectivity of this iterative HAT pathway, wherein the second C-H iodination is twice as fast as the first.

Chemical Science published new progress about Aliphatic alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Fovanna, Thibault; Campisi, Sebastiano; Villa, Alberto; Kambolis, Anastasios; Peng, Gael; Rentsch, Daniel; Krocher, Oliver; Nachtegaal, Maarten; Ferri, Davide published the artcile< Ruthenium on phosphorous-modified alumina as an effective and stable catalyst for catalytic transfer hydrogenation of furfural>, Name: (Tetrahydrofuran-2-yl)methanol, the main research area is ruthenium phosphorus modified alumina catalyst preparation furfural hydrogenation.

Supported ruthenium was used in the liquid phase catalytic transfer hydrogenation of furfural. To improve the stability of Ru against leaching, phosphorus was introduced on a Ru/Al2O3 based catalyst upon impregnation with ammonium hypophosphite followed by either reduction or calcination to study the effect of phosphorus on the physico-chem. properties of the active phase. Characterization using X-ray diffraction, solid state 31P NMR spectroscopy, X-ray absorption spectroscopy, temperature programmed reduction with H2, IR spectroscopy of pyridine adsorption from the liquid phase and transmission electron microscopy indicated that phosphorus induces a high dispersion of Ru, promotes Ru reducibility and is responsible for the formation of acid species of bronsted character. As a result, the phosphorus-based catalyst obtained after reduction was more active for catalytic transfer hydrogenation of furfural and more stable against Ru leaching under these conditions than a benchmark Ru catalyst supported on activated carbon.

RSC Advances published new progress about Calcination. 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

Netto-Ferreira, J. C.; Wintgens, V.; Scaiano, J. C. published the artcile< Lifetimes of biradicals produced in the Norrish Type I reaction of methyl-substituted 2-tetralones>, Synthetic Route of 5455-94-7, the main research area is Norrish photolysis biradical lifetime tetralone.

The Norrish Type I biradicals derived from 2-tetralones decay by a competition of recyclization to the starting material, intramol. disproportionation to yield aldehydes and decarbonylation. The last path is only favored in the case of 3,3-dimethylated derivatives while, in the other extreme, the parent 2-tetralone is essentially photostable. The biradical lifetimes are around 140 ns in benzene and 40 ns or less in nonaromatic solvents; they show little sensitivity to the solvent polarity and hydrogen bonding ability. The remarkable stabilization of the biradical in benzene is probably due to specific interactions between the acyl center in the biradical and benzene, since similar effects have not been observed in other biradicals.

Journal of Photochemistry and Photobiology, A: Chemistry published new progress about Biradicals Role: RCT (Reactant), RACT (Reactant or Reagent). 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, Synthetic Route of 5455-94-7.

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

Tang, Feiying; Wang, Liqiang; Dessie Walle, Maru; Mustapha, Abdulhadi; Liu, You-Nian published the artcile< An alloy chemistry strategy to tailoring the d-band center of Ni by Cu for efficient and selective catalytic hydrogenation of furfural>, Electric Literature of 97-99-4, the main research area is nickel copper alloy catalyst furfural hydrogenation morphol textural property.

Nickel is a promising catalyst for the hydrogenation of furfural (FA) into furfuryl alc. (FOL) and tetrahydrofurfuryl alc. (TFOL). However, slow H* desorption and low catalytic selectivity limit its practical application. Herein, we employed an alloying strategy to tailoring the d-band center of Ni by Cu for efficient and selective catalytic hydrogenation of furfural. A series of Ni-Cu alloy catalysts (NiCux/C) were prepared by pyrolyzing NiCux-BTC (a MOF containing Cu and Ni) precursors. Theor. calculation demonstrates that Ni exhibits a downshifted d-band center once alloyed by Cu. This change can not only promote the desorption of H from Ni surface to improve the catalytic activity but also thermodynamically favor the transformation of adsorption orientation of FA (from a flat orientation on Ni to a tilted one on Ni-Cu alloy) to enable the selective conversion of FA into FOL or TFOL on demand. NiCu0.33/C catalyst exhibits enhanced activity and selectivity for FA hydrogenation compared to pure Ni and Cu.

Journal of Catalysis published new progress about Density of states. 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