Tag: M.W=100-150

Yeh, Jyun-Yi; Matsagar, Babasaheb M.; S. Chen, Season; Sung, Hsiang-Ling; Tsang, Daniel C. W.; Li, Yi-Pei; Wu, Kevin C.-W. published the artcile< Synergistic effects of Pt-embedded, MIL-53-derived catalysts (Pt@Al2O3) and NaBH4 for water-mediated hydrogenolysis of biomass-derived furfural to 1,5-pentanediol at near-ambient temperature>, Application of C5H10O2, the main research area is synergistic platinum embedded catalyst Al2O3 NaBH4 hydrogenolysis biomass.

We demonstrate an effective and selective conversion of biomass-derived furfural (FAL) to 1,5-pentanediol (1,5-PD) with high yields through a water-mediated hydrogenolysis process under mild reaction conditions (45°C, aqueous media). A novel alumina-supported platinum catalyst (Pt@Al2O3) with high-loading and uniform distribution of Pt nanoparticles is prepared through in situ synthesis of Pt-embedded metal-organic frameworks (i.e., MIL-53(Al)-NH2). As a typical example, a high yield of 75.2% 1,5-PD can be achieved from FAL conversion. A possible reaction mechanism is proposed based on the exptl. and computational findings, including XPS anal., kinetic studies, acidity measurements, and d. functional theory (DFT) calculations The high effectiveness of the proposed system is attributed to (1) the strong metal support interaction (SMSI) between Pt and penta-coordination aluminum, and (2) the synergistic effects of Bronsted acidic alumina support and the presence of sodium metaborate (NaBO2). Sodium borohydride (NaBH4) acts as both a hydrogen donor and a precursor for NaBO2, which results in an exclusive FAL to 1,5-PD (i.e., no 1,2-pentanediol) by regulating the water-mediated hydrogenolysis pathway as revealed by experiments and DFT calculations The reaction strategy proposed in this study has also manifested remarkable versatility for a wide range of furan derivatives

Journal of Catalysis published new progress about Biomass. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Application of C5H10O2.

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

Nazarski, Ryszard B. published the artcile< Physical image vs structure relation: part 12 - structure of 2,2,5,5-tetramethyl-dihydro-furan-3-one oxime and its protonated forms through isomerization and NMR spectra>, Product Details of C8H14O2, the main research area is structure methyldihydrofuranone oxime protonated form thermal isomerization NMR GIAO.

The study of an isomeric A/B mixture of the title oxime 1, by photolytic or thermal E,Z-isomerization and NMR measurement including 1H{1H}-NOE difference spectra, led to assignment of the E configuration to its predominating form A. The 1H/13C data were interpreted in terms of steric overcrowding of both forms, especially of the thermolabile photoproduct B. Four classical (empirical) NMR methods of elucidating the oxime geometry were critically tested on these results. Unexpected vapor-phase photoconversion A→B in the window glass-filtered solar UV and spectroscopic findings on their protonated states were discussed, as well. The kinetically controlled formation of the N-protonated species (Z)-5+ was proved exptl. In addition, some 1H NMR assignments reported for structurally similar systems were rationalized (3 and 4) or revised (1 and 7-9) with the GIAO-DFT(B3LYP) and/or GIAO-HF calculational results.

Journal of Physical Organic Chemistry published new progress about Cis-trans thermal isomerization. 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, Product Details of C8H14O2.

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

Pirmoradi, Maryam; Janulaitis, Nida; Gulotty, Robert J. Jr; Kastner, James R. published the artcile< Bi-Metal-Supported Activated Carbon Monolith Catalysts for Selective Hydrogenation of Furfural>, SDS of cas: 97-99-4, the main research area is bi metal supported carbon monolith catalyst hydrogenation furfural.

Activated carbon monolith (ACM) catalysts were impregnated with Pd, Pd-Cu, and Pd-Fe for continuous hydrogenation of aqueous furfural (FUR). The effect of temperature, pressure, and liquid residence time on product selectivity and space-time yield (STY) was determined Adding a second metal to Pd/ACM shifted the selectivity of the catalyst from 2-methylfuran (2MF) and 2-methyltetrahydrofuran (2MTHF) to furfuryl alc. (FA) and tetrahydrofurfuryl alc. (THFA), resp., over the range of tested temperatures and pressures. High STYs of 272 g/Lcat/h (1089 g/kg-cat/h) for THFA and 143 g/Lcat/h (574 g/kg-cat/h) for FA were achieved using Pd-Fe/ACM at 180°C and 300 psig. Similarly, adding Fe increased the FUR, FA, and THFA turnover frequency by a factor of 3, 4, and 60, resp. The effect was not as pronounced when adding Cu. The effect of acetic acid, an impurity present in crude FUR, on FUR conversion and product selectivity was determined The surface area anal. indicated a relatively low loss of surface area over 13 hydrogenation reactions on each catalyst. The presence of a second metal on the monolith catalyst stabilized the Pd particles, reduced the leaching, and altered the product selectivity.

Industrial & Engineering Chemistry Research published new progress about Hydrogenation. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, SDS of cas: 97-99-4.

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>, Recommanded Product: 2,2,5,5-Tetramethyldihydrofuran-3(2H)-one, 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 Chemistry published new progress about Indole alkaloids Role: SPN (Synthetic Preparation), PREP (Preparation). 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, Recommanded Product: 2,2,5,5-Tetramethyldihydrofuran-3(2H)-one.

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

Verevkin, Sergey P.; Siewert, Riko; Pimerzin, Andrey A. published the artcile< Furfuryl alcohol as a potential liquid organic hydrogen carrier (LOHC): Thermochemical and computational study>, HPLC of Formula: 97-99-4, the main research area is furfuryl alc liquid organic hydrogen carrier thermochem hydrogenation dehydrogenation.

The liquid organic H carriers (LOHCs) are considered as a promising materials for H storage. The liquid phase standard molar enthalpies of formation of furfuryl alc. and tetrahydrofurfuryl alc. were obtained from high-precision combustion calorimetry. Their standard molar enthalpies of vaporization were derived from the vapor pressure temperature dependences measured by the transpiration method. Gas phase molar enthalpies of formation of furfuryl alc. and tetrahydrofurfuryl alc. calculated by the high-level quantum-chem. method G4, were in an excellent agreement with the exptl. results. Reaction enthalpies and equilibrium temperature of the hydrogenation/dehydrogenation reactions of furfuryl alc. were calculated and compared with the data for furan and other potential liquid organic H carriers.

Fuel published new progress about Alcohols Role: PRP (Properties), TEM (Technical or Engineered Material Use), USES (Uses). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, HPLC of Formula: 97-99-4.

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>, Application of C5H10O2, 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 Environment published new progress about Alcohols, nitro Role: POL (Pollutant), OCCU (Occurrence). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Application of C5H10O2.

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

Meng, Xiaoyu; Wang, Lei; Chen, Lifang; Xu, Ming; Liu, Ning; Zhang, Junbo; Yang, Yusen; Wei, Min published the artcile< Charge-separated metal-couple-site in NiZn alloy catalysts towards furfural hydrodeoxygenation reaction>, Reference of 97-99-4, the main research area is nickel zinc alloy catalyst furfural hydrodeoxygenation reaction.

Catalytic conversion of biomass furfural (FAL) to high value-added products (e.g., 2-methylfuran, MF) has attracted considerable attention, in which control over catalytic selectivity plays a crucial issue. Herein, a series of heterogonous NiZn alloy supported on the mixed metal oxides (MMO) were synthesized derived from layered double hydroxides (LDHs) with various Ni/Zn ratio (3/1, 1/1 or 1/3). XRD, HRTEM and XAFS measurements confirm that with the increase of Zn content, the corresponding NiZn alloy transforms from α-NiZn to β-NiZn. Dramatically, the selectivity of MF displays an improvement from 12% to 95% along with this phase transformation process; and the MF yield reaches to 95% over Ni1Zn3-MMO sample. A combination study including XPS, CO-DRIFTS, in situ FT-IR and DFT calculation verifies that metallic Ni serves as active site, resulting in an effective suppression of side reactions. Moreover, a charge-separated metal-couple-site (Niδ–Znδ+) is on the surface of Ni1Zn3-MMO originating from electron transfer between Ni and Zn. This active structure stabilizes a η2(C, O) adsorption configuration of intermediate, in which C atom is bonded to the Niδ- site and O atom is attached to the Znδ+ site. This work provides an efficient and cost-effective catalyst that can simultaneously inhibit C=C hydrogenation and promote C-O cleavage, which would be potentially used in catalytic conversion of biomass-derived platform mols.

Journal of Catalysis published new progress about Adsorption energy. 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

Mironenko, R. M.; Belskaya, O. B.; Likholobov, V. A. published the artcile< Solvent effect on the rate and direction of furfural transformations during hydrogenation over the Pd/C catalyst>, Category: tetrahydrofurans, the main research area is furfural palladium catalyst hydrogenation kinetics solvent effect.

The rate and directions of transformations during the liquid-phase hydrogenation of furfural with mol. hydrogen in the presence of the 5%Pd/C catalyst (at 423 K, 3 MPa) depend substantially on the chem. nature of the solvent. The main products of the catalytic transformations in alcs. are alkyl furyl ethers. Hydrogenation in solvent environment of aromatic hydrocarbons and 1,4-dioxane (nonpolar solvents), as well as in Et acetate and DMF (polar aprotic solvents) leads to the predominant formation of furfuryl alc., and its highest selectivity (up to 92%) is achieved with the use of DMF.

Russian Chemical Bulletin published new progress about Hydrogenation. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Category: tetrahydrofurans.

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

Li, Zhi-Xin; Wei, Xian-Yong; Yang, Zheng; Li, Jun; Yan, Wei-Wei; Bie, Lei-Lei; Zhang, Yang-Yang; Li, Sheng; Zong, Zhi-Min published the artcile< Selective hydrogenation of bio-based furfural over Co-based catalysts derived from zeolitic imidazolate frame materials>, Name: (Tetrahydrofuran-2-yl)methanol, the main research area is hydrogenation bio furfural cobalt catalyst zeolitic imidazolate frame.

Co-Zn/NC was prepared by a sacrificial template self-reduction method with zeolitic imidazolate frame-8 (ZIF-8) impregnating the Co2+ as the precursor. At 125°C for 2.5 h, furfural was completely converted to furan-2-ylmethanol (FM) over Co17Zn/NC600, while FM selectivity over Co/NC600 is only 70.6%. According to multiple characterizations, Co17Zn/NC600 (Co loading 17%, calcined at 600°C) consists of flower-like spherical Co3ZnC nanoparticles (NPsCo3ZnC) uniformly distributed on its surface. The NPsCo3ZnC are the main active ingredients for highly selective furfural hydrogenation to FM, which is confirmed by furfural hydrogenation over Co-Zn/NC prepared with different Co loadings and different calcination temperatures The excellent activity and stability of Co17Zn/NC600 were confirmed by recycling experiment and furfural conversion is still above 90% after repeated use of Co17Zn/NC600 for 8 cycles.

Molecular Catalysis published new progress about Binding energy. 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

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>, Computed Properties of 97-99-4, 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, Computed Properties of 97-99-4.

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