Day: October 12, 2022

Modelska, Magdalena; Binczarski, Michal J.; Kaminski, Zbigniew; Karski, Stanislaw; Kolesinska, Beata; Mierczynski, Pawel; Severino, Courtney J.; Stanishevsky, Andrei; Witonska, Izabela A. published the artcile< Bimetallic Pd-Au/SiO2 catalysts for reduction of furfural in water>, Application In Synthesis of 97-99-4, the main research area is palladium gold silicon dioxide furfural water bimetallic catalyst reduction.

Catalytic systems based on bimetallic Pd-Au particles deposited on SiO2 were prepared by ultrasonically assisted water impregnation and used in the hydrogenation of furfural obtained by the acidic hydrolysis of waste biomass (brewery’s spent grain) in aqueous phase. Pd-Au/SiO2 catalysts containing 50 g of Pd and 2-100 g of Au per 1 kg of catalyst were characterized by high activity in the studied process and, depending on the Pd/Au ratio, selectivity to 2-methyloxolan-2-ol. The modification of 5%Pd/SiO2 by Au leads to the formation of dispersed Au-Pd solid solution phases, which was confirmed by XRD, XPS, ToF-SIMS, SEM-EDS, and H2-TPR techniques. The effect of dilution of surface palladium by gold atoms is probably crucial for modification of the reaction mechanism and formation of 2-methyloxolan-2-ol as the main product.

Catalysts published new progress about Acid hydrolysis. 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

Fouad, Hanan M.; Sabry, Magda A.; Ahmed, Amal; Hassany, Mohamed; Al Soda, Mohamed F.; Abdel Aziz, Hossam published the artcile< Generic ledipasvir-sofosbuvir treatment for adolescents with chronic hepatitis C virus infection>, Recommanded Product: ((2R,3S,4R,5R)-5-(2,4-Dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl dihydrogen phosphate, the main research area is Egypt; HCV; adolescents; brand; generic ledipasvir-sofosbuvir.

We assessed the safety and efficacy of a generic form of ledipasvir-sofosbuvir for the treatment of hepatitis C virus infection in Egyptian adolescents and compared the results with those of treatment with the brand-named form. The generic form resulted in a high response rate, significant improvement in liver function, and mild adverse effects. These results are comparable with those of the brand form at a reduced price.

Journal of the Pediatric Infectious Diseases Society published new progress about 58-97-9. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Recommanded Product: ((2R,3S,4R,5R)-5-(2,4-Dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl dihydrogen phosphate.

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

Mai, Anh Thi Minh; Thakur, Ashutosh; Ton, Nhan Nu Thanh; Nguyen, Thanh Nhat; Kaneko, Tatsuo; Taniike, Toshiaki published the artcile< Photodegradation of a semi-aromatic bio-derived polyimide>, Formula: C8H4O6, the main research area is semi aromatic polyimide photodegradation mech property.

Recently, we have developed a thermoelec. superior and highly transparent bio-derived polyimide using microorganism-derived 4-aminocinnamic acid. Here, the stability of the novel bio-derived polyimide under photoirradiation was systematically investigated. IR spectroscopy (IR), solid-state NMR, and tensile tests were employed for studying the impacts of the irradiation on both chem. and mech. properties of the material. The structural modifications of the material were analyzed in the form of spectral expression of correlation coefficients It was found that the bio-derived polyimide maintained its stability well up to several hundreds of hours. Elongated radiation caused deterioration at the imide ring and the tertiary carbon of the cyclobutane ring, accompanied by the growth of carbonyl species as an oxidation product.

Polymer Degradation and Stability published new progress about Elongation at break. 4415-87-6 belongs to class tetrahydrofurans, and the molecular formula is C8H4O6, Formula: C8H4O6.

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

Galkina, Olesia S.; Maas, Gerhard; Rodina, Liudmila L.; Nikolaev, Valerij A. published the artcile< Eco-Friendly Approach to Tetrasubstituted Diazodihydrofuranones: Valuable Precursors of Oxetane Derivatives and Other Heterocyclic Compounds>, COA of Formula: C8H14O2, the main research area is diazodihydrofuranone tetrasubstituted green preparation crystal structure.

Eco-friendly routes to 2,2,5,5-tetrasubstituted 4-diazodihydrofuran-3(2H)-ones were developed. In this manner, useful precursors to oxetane derivatives, potential NSAIDs, and other biol. active pharmaceuticals can be prepared without use of toxic reagents and solvents.

Synthesis published new progress about Crystal structure. 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, COA of Formula: C8H14O2.

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

Carmen Lafita-Navarro, M.; Perez-Castro, Lizbeth; Zacharias, Lauren G.; Barnes, Spencer; DeBerardinis, Ralph J.; Conacci-Sorrell, Maralice published the artcile< The transcription factors aryl hydrocarbon receptor and MYC cooperate in the regulation of cellular metabolism>, Quality Control of 58-97-9, the main research area is fibroblast cellular metabolism transcription factors aryl hydrocarbon receptor MYC; MYC (c-Myc); aryl hydrocarbon receptor (AHR); cancer; gene regulation; glioblastoma; glycolysis; metabolism; metabolomics; oncogene; pyrimidine.

The transcription factor AHR (aryl hydrocarbon receptor) drives the expression of genes involved in detoxification pathways in cells exposed to pollutants and other small mols. Moreover, AHR supports transcriptional programs that promote ribosome biogenesis and protein synthesis in cells stimulated to proliferate by the oncoprotein MYC. Thus, AHR is necessary for the proliferation of MYC-overexpressing cells. To define metabolic pathways in which AHR cooperates with MYC in supporting cell growth, here we used LC-MS-based metabolomics to examine the metabolome of MYC-expressing cells upon AHR knockdown. We found that AHR knockdown reduced lactate, S-lactoylglutathione, N-acetyl-L-alanine, 2-hydroxyglutarate, and UMP levels. Using our previously obtained RNA sequencing data, we found that AHR mediates the expression of the UMP-generating enzymes dihydroorotate dehydrogenase (quinone) (DHODH) and uridine monophosphate synthetase (UMPS), as well as lactate dehydrogenase A (LDHA), establishing a mechanism by which AHR regulates lactate and UMP production in MYC-overexpressing cells. AHR knockdown in glioblastoma cells also reduced the expression of LDHA (and lactate), DHODH, and UMPS but did not affect UMP levels, likely because of compensatory mechanisms in these cells. Our results indicate that AHR contributes to the regulation of metabolic pathways necessary for the proliferation of transformed cells.

Journal of Biological Chemistry published new progress about Animal gene Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (ALDOA). 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Quality Control of 58-97-9.

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

Lawitz, Eric; Landis, Charles S; Flamm, Steven L; Bonacini, Maurizio; Ortiz-Lasanta, Grisell; Huang, Jonathan; Zhang, Jie; Kirby, Brian J; De-Oertel, Shampa; Hyland, Robert H; Osinusi, Anu O; Brainard, Diana M; Robson, Richard; Maliakkal, Benedict J; Gordon, Stuart C; Gane, Edward J published the artcile< Sofosbuvir plus ribavirin and sofosbuvir plus ledipasvir in patients with genotype 1 or 3 hepatitis C virus and severe renal impairment: a multicentre, phase 2b, non-randomised, open-label study.>, Computed Properties of 58-97-9, the main research area is .

BACKGROUND: There is a medical need for highly effective, safe, and well tolerated treatments for patients infected with hepatitis C virus (HCV) with severe renal impairment. We investigated the safety and efficacy of sofosbuvir with ribavirin or ledipasvir combined with sofosbuvir in a prospective study of patients with genotype 1 or 3 HCV infection and stage 4-5 chronic kidney disease (creatinine clearance by Cockcroft-Gault ≤30 mL/min) who were not on dialysis. METHODS: This phase 2b, open-label, non-randomised, multicentre study in the USA and New Zealand investigated three sequentially enrolled cohorts of patients. Patients were recruited from ten hospitals and clinical research centres and were included if they had genotype 1 or 3 HCV infection, a creatinine clearance less than or equal to 30 mL/min, and were not on dialysis. In cohorts 1 and 2, patients received sofosbuvir (200 mg in cohort 1 and 400 mg in cohort 2) plus ribavirin 200 mg once per day for 24 weeks. In cohort 3, 18 patients received ledipasvir combined with sofosbuvir (90 mg ledipasvir and 400 mg sofosbuvir) once per day for 12 weeks. The primary efficacy endpoint was the proportion of patients achieving sustained virological response 12 weeks after the end of treatment (SVR12). Safety and pharmacokinetic data were also collected. The trial is registered with ClinicalTrials.gov, number NCT01958281, and is completed. FINDINGS: This study was done between Oct 7, 2013, and Oct 29, 2017. In the sofosbuvir plus ribavirin cohorts, 32 patients were screened, of whom 20 were enrolled and assessed for efficacy and safety (ten patients in each cohort). In the ledipasvir plus sofosbuvir cohort, 33 patients were screened, of whom 18 were enrolled and assessed for treatment efficacy and safety. Four (40%, 95% CI 12-74) of ten patients in cohort 1 and six (60%, 26-88) of ten patients in cohort 2 achieved SVR12. All 18 (100%, 82-100) patients in cohort 3 achieved SVR12. Adverse events were mostly mild or moderate in severity. The most commonly reported adverse events overall were headache (eight [21%] of 38 patients), anaemia (seven [18%] of 38 patients), and fatigue (six [16%] of 38 patients). Eight patients had serious adverse events, none of which were treatment related. There were no treatment-related cardiac events or clinically significant changes in echocardiographic parameters or creatinine clearance by Cockcroft-Gault. INTERPRETATION: In this phase 2b study, ledipasvir combined with sofosbuvir for 12 weeks was safe and effective in patients with genotype 1 HCV infection and stage 4-5 chronic kidney disease who were not on dialysis. FUNDING: Gilead Sciences.

The lancet. Gastroenterology & hepatology published new progress about 58-97-9. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Computed Properties of 58-97-9.

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

Pirmoradi, Maryam; Kastner, James R. published the artcile< A kinetic model of multi-step furfural hydrogenation over a Pd-TiO2 supported activated carbon catalyst>, Related Products of 97-99-4, the main research area is furfural hydrogenation palladium titanium activated carbon catalyst kinetic model.

The multi-step, aqueous phase hydrogenation kinetics of furfural (FUR) to furfuryl alc. (FA), 2-methylfuran (2MF), tetrahydrofurfuryl alc. (THFA) and 5-hydroxy-2-pentanone (5H2P) over Pd-TiO2 on an activated carbon catalyst (derived from a monolith structure) was studied (180°C, 2.1 MPa). Titanium addition created a metal-acid functional catalyst and promoted 5H2P synthesis from furfural. A Langmuir-Hinshelwood model with two active sites (a metal site for hydrogenation steps and an acid site for ring opening step) was applied to fit the kinetic data and parameters of the reaction system were obtained using non-linear regression of exptl. data. The kinetic model showed an acceptable agreement with the exptl. data with R2 of 0.93-0.96 and concentration residuals (exptl.-model) typically ≤ 5%. Adsorption constants of 2MF and THFA were significantly lower than the adsorption constants of the other three compounds A reaction rate constant of 1.6-1.8 mol/gcat.h for furfural consumption was predicted by the model. Reaction rates of 0.2-0.35 mol/gcat.h, 0.1-0.13 mol/gcat.h and 0.8-1.0 mol/gcat.h were predicted for formation of 2-methylfuran, tetrahydrofurfuryl alc. and 5-hydroxy-2-pentanone, resp. External and internal mass transfer criterion indicate intrinsic rate parameters were estimated and indicate the model can be used to perform monolithic reactor design for aqueous phase hydrogenation of furfural.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Hydrogenation. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Related Products of 97-99-4.

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

Lee, Jihyeon; Woo, Jinwoo; Nguyen-Huy, Chinh; Lee, Man Sig; Joo, Sang Hoon; An, Kwangjin published the artcile< Highly dispersed Pd catalysts supported on various carbons for furfural hydrogenation>, Reference of 97-99-4, the main research area is palladium nanoparticle carbon catalyst furfural hydrogenation cyclopentanone furfuryl alc.

Furfural (FAL), one of the important platform mols. derived from lignocellulosic biomass, can be converted into valuable chems. such as furfuryl alc. or cyclopentanone via hydrogenation. While carbon materials have been used as versatile catalyst supports for FAL hydrogenation, systematic studies on the structure of the catalytic performances are lacking. In this work, we prepare various types of carbon supports to investigate the impact of carbon structures for Pd-catalyzed FAL hydrogenation. Mesoporous carbons, including CMK-3, CMK-5, CMK-8, and MSU-F-C, as well as carbon nanotube and Vulcan XC are used as carbon supports. For the preparation of highly dispersed Pd-supported carbon (Pd/C) catalysts, chem. reduction by sodium borohydride is applied, in which trisodium citrate plays a critical role in anchoring small Pd clusters on the carbons. In the liquid-phase hydrogenation of FAL, CMK-5 with the largest surface area and hexagonal hollow tubular framework is proven to be the most efficient carbon support for Pd/C catalysts, with the highest conversion of FAL in both 2-propanol (100%) and water (86.4%) solvents. It is also demonstrated that the product selectivity in FAL hydrogenation over various Pd/C catalysts is changed dramatically depending on the type of solvent. The Pd/C catalysts exhibit similar fractions of product distributions containing furfuryl alc., cyclopentanol, tetrahydrofurfuryl alc., and minor products in 2-propanol. However, the production of cyclopentanone is increased when water is used as a solvent.

Catalysis Today published new progress about Carbon black Role: CAT (Catalyst Use), PRP (Properties), USES (Uses) (Vulcan XC, catalyst support). 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

Chappell, Catherine A.; Scarsi, Kimberly K.; Kirby, Brian J.; Suri, Vithika; Gaggar, Anuj; Bogen, Debra L.; Macio, Ingrid S.; Meyn, Leslie A.; Bunge, Katherine E.; Krans, Elizabeth E.; Hillier, Sharon L. published the artcile< Ledipasvir plus sofosbuvir in pregnant women with hepatitis C virus infection: a phase 1 pharmacokinetic study>, SDS of cas: 58-97-9, the main research area is .

Background Hepatitis C virus (HCV) infection is increasing among pregnant women because of the opioid epidemic, yet there are no interventions to reduce perinatal HCV transmission or to treat HCV during pregnancy. Physiol. changes in pregnancy alter the pharmacokinetics of some medications; thus, our aim was to compare the pharmacokinetic parameters of ledipasvir 90 mg plus sofosbuvir 400 mg during pregnancy with non-pregnant women. Methods This was an open-label, phase 1 study of pregnant women with genotype 1 HCV infection and their infants. A reference group of women who had participated in pharmacokinetic studies of ledipasvir-sofosbuvir during phase 2 and 3 trials was used. Participants were enrolled at Magee-Womens Hospital (Pittsburgh, PA, USA) between 23 and 24 wk’ gestation and had a 12-wk course of oral ledipasvir-sofosbuvir (daily 90 mg ledipasvir plus 400 mg sofosbuvir). Three 12-h intensive pharmacokinetic visits were done at 25-26, 29-30, and 33-34 wk’ gestation and individual pharmacokinetics were summarised by geometric mean across the three visits. The primary outcome, analyzed in all participants without suspected dosing errors, was the ledipasvir-sofosbuvir area under the concentration-time curve of the dosing interval (AUCtau) during pregnancy compared with the reference group by geometric mean ratio. This study is registered with ClinicalTrials.gov, NCT02683005. Findings From Oct 1, 2016, to Sept 30, 2018, 29 pregnant women were screened and nine (31%) were enrolled. Eight (89%) women were included in the primary anal. Ledipasvir and sofosbuvir exposures were similar in the pregnant women vs. the non-pregnant reference group (geometric mean ratio of AUCtau ledipasvir 89·3% [90% CI 68·7-116·1]; sofosbuvir 91·1% [78·0-106·3]). Interpretation Ledipasvir-sofosbuvir was safe and effective without clin. meaningful differences in drug exposure among pregnant vs. non-pregnant women.

Lancet Microbe published new progress about 58-97-9. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, SDS of cas: 58-97-9.

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

Chen, Changzhou; Zhou, Minghao; Jiang, Jianchun published the artcile< Selective aqueous-phase hydrogenation of furfural to cyclopentanol over Ni-based catalyst under mild conditions>, Safety of (Tetrahydrofuran-2-yl)methanol, the main research area is hydrogenation furfural cyclopentanol nickel catalyst selective aqueous phase.

A series of carbon nanotube (CNT)-supported Ni-based catalysts were prepared through a simple impregnation method. The synthesized Ni-based bimetallic catalysts exhibited much smaller particle size and better dispersion than monometallic Ni/CNT catalyst. Owing to the synergistic effect of Ni with Mo, the material was especially active to hydrogenation of biomass derivatives in aqueous medium. Promotional effect was observed in NiMo/CNT catalyst during hydrogenation of furfural to fine chems., including cyclopentanone/cyclopentanol, which is of profound practical values for processing biomass degradation and may be applied in the food and biomass refining industry.

Journal of the Chinese Chemical Society (Weinheim, Germany) published new progress about Carbon nanotubes. 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