Category: Tetrahydrofurans

Banga, Jaspreet; Nizami, Sobia; Slim, Jihad; Nagarakanti, Sandhya; Portilla, Mario; Swaminathan, Shobha published the artcile< Hepatitis C virus treatment response to ledipasvir/sofosbuvir among patients coinfected with HIV and HCV: Real world data in a black population>, HPLC of Formula: 58-97-9, the main research area is ledipasvir antiviral agent hepatitis C virus HIV.

Treatment of hepatitis C virus (HCV) infection for patients with human immunodeficiency virus (HIV) has improved with direct acting antivirals. However, outcomes among Black persons treated with ledipasvir/sofosbuvir (LDV/SOF) may be inferior to non-Blacks. We assessed responses to LDV/SOF in a cohort of Black HIV/HCV coinfected persons.Retrospective chart reviews were conducted for Black, genotype 1 (GT1), HIV/HCV coinfected patients treated with LDV/SOF at 3 hospitals in Newark, NJ between Jan. 2014 and July 2016. Data collected included demographics, HCV treatment history, treatment duration, and response.One hundred seventeen HIV/HCV coinfected Black patients started treatment with LDV/SOF but 5 had no follow-up data and 5 prematurely discontinued treatment (1 due to side effects). We included 107HIV/HCV coinfected patients who completed LDV/SOF at all 3 sites. The study population was 65% male, median age 58 years, 26% had cirrhosis, and 78% had GT1a. Thirty-one percent were treatment experienced but none with prior NS5a treatment. At baseline, median CD4 count was 680cells/mm, HIV viral load (VL) was <40copies/mL in 94% and median HCV VL was 2,257,403IU/mL. Twenty-nine percent of patients changed antiretroviral treatment before LDV/SOF treatment due to drug interactions. Six, 89, and 12 patients completed 8, 12, and 24 wk of LDV/SOF, resp. Overall sustained virol. response rate was 93% with 7 relapses.In this real-world cohort of Black, GT1, HIV/HCV coinfected patients, LDV/SOF had high sustained virol. response 12 wk post completion of treatment rate of 93%. This data supports the overall high efficacy of LDV/SOF in a historically difficult-to-treat patient population. Medicine (Philadelphia, PA, United States) published new progress about Antiviral agents. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, HPLC of Formula: 58-97-9.

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>, Application In Synthesis 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 Edition published new progress about Autocatalysis. 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

Cortese, Melissa; Delporte, Cedric; Dufour, Damien; Noyon, Caroline; Chaumont, Martin; De Becker, Benjamin; Reye, Florence; Rousseau, Alexandre; Omer, Eker; Neve, Jean; Piagnerelli, Michael; Boudjeltia, Karim Zouaoui; Robaye, Bernard; Van Antwerpen, Pierre published the artcile< Validation of a LC/MSMS method for simultaneous quantification of 9 nucleotides in biological matrices>, Name: ((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 UHPLC tandem mass spectrometry nucleotide blood endothelium erythrocyte.

Nucleotides play a role in inflammation processes: cAMP and cGMP in the endothelial barrier function, ADP in platelet aggregation, ATP and UTP in vasodilatation and/or vasoconstriction of blood vessels, UDP in macrophages activation. The aim of this study is to develop and validate a LC/MS-MS method able to quantify simultaneously nine nucleotides (AMP, cAMP, ADP, ATP, GMP, cGMP, UMP, UDP and UTP) in biol. matrixes (cells and plasma). The method we developed, has lower LOQ’s than others and has the main advantage to quantify all nucleotides within one single injection in less than 10 min. The measured nucleotides concentrations obtained with this method are similar to those obtained with assay kits com. available. Anal. of plasma and red blood cells from healthy donors permits to estimate the physiol. concentration of those nucleotides in human plasma and red blood cells, such information being poorly available in the literature. Furthermore, the protocol presented in this paper allowed us to observe that AMP, ADP, ATP concentrations are modified in human red blood cells and plasma after a venous stasis of 4 min compared to physiol. blood circulation. Therefore, this specific method enables future studies on nucleotides implications in chronic inflammatory diseases but also in other pathologies where nucleotides are implicated in.

Talanta published new progress about Aneurysm (post-stenting). 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Name: ((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

Modelska, Magdalena; Binczarski, Michal J.; Dziugan, Piotr; Nowak, Szymon; Romanowska-Duda, Zdzislawa; Sadowski, Adam; Witonska, Izabela A. published the artcile< Potential of waste biomass from the sugar industry as a source of furfural and its derivatives for use as fuel additives in Poland>, Related Products of 97-99-4, the main research area is furfural biomass lignocellulosic waste fuel additive.

Poland is one of the leading producers of sugar from sugar beet in Europe. However, the production of sugar generates large amounts of lignocellulosic waste, in the form of beet pulp and leaves. Currently, this waste is not reutilized in the chem. industry, but is only used as food for farm animals. This paper assesses the potential of using bio-waste from the sugar industry as a raw material for the production of furfurals via acid hydrolysis. Further processing of furfural into derivatives such as furfuryl alc. (FA) or tetrahydrofurfuryl alc. (THFA) could increase the economic profitability of the initiative. Furfuryl alc. can be used as a fuel additive in sugar factories. Tetrahydrofurfuryl alc. can be used as a component in agricultural fertilizers, increasing the yield of sugar beet. This approach reduces the amount of post-production waste and brings the sugar industry closer to the concept of a circular economy.

Energies (Basel, Switzerland) published new progress about Beta vulgaris saccharifera, pulp, silage. 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

Chen, Lifang; Ye, Jingyun; Yang, Yusen; Yin, Pan; Feng, Haisong; Chen, Chunyuan; Zhang, Xin; Wei, Min; Truhlar, Donald G. published the artcile< Catalytic Conversion Furfuryl Alcohol to Tetrahydrofurfuryl Alcohol and 2-Methylfuran at Terrace, Step, and Corner Sites on Ni>, Formula: C5H10O2, the main research area is nickel catalytic conversion furfuryl alc tetrahydrofurfuryl alc methylfuran.

The surface structures at catalytic sites are critical factors for determining catalytic selectivity. Here, we use periodic d. functional theory and microkinetic modeling to systematically investigate the effect of surface structures on the conversion of furfuryl alc. (FA). We consider nine surface terminations of Ni with various coordination numbers representing terrace, step, and corner sites. We study three reaction paths for FA conversion on various surfaces and find that the surface structure impacts the adsorption configuration and causes significant differences in selectivity. Barrier height anal. shows that terrace sites favor hydrogenation to tetrahydrofurfuryl alc. (THFA), whereas corner sites favor C-OH bond scission to produce 2-methylfuran (2-MF); step sites show similar barriers for the two reactions. We explain this by identifying three characteristics of the reactant adsorption structures that have a significant effect on selectivity, namely, that a shorter distance between the adsorbed hydrogen atom and the C3 carbon of FA favors hydrogenation to produce THFA, and more neg. charge transfer to Oalcohol and a longer C-Oalcohol bond length favor C-Oalcohol bond scission to produce 2-MF. Since the reactions have similar barriers at a step site, microkinetic calculations are employed to calculate the product selectivity on a step site under exptl. conditions. At lower temperatures and higher generalized coordination number (CN), THFA is the most favorable product, while the selectivity to 2-MF is higher at lower CN and at higher temperature This work provides guidance for the rational design catalysts to control the product distribution of FA conversion.

ACS Catalysis published new progress about Adsorption. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Formula: C5H10O2.

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

Kofler, Lukas; Berg, Christoph; Kofler, Katrin; Geipel, Andrea; Lipp, Hans-Peter; Müller, Alisa; Eigentler, Thomas; Forschner, Andrea published the artcile< Simultaneous targeted therapy for metastatic melanoma and hepatitis C.>, Category: tetrahydrofurans, the main research area is .

There is no abstract available for this document.

Journal der Deutschen Dermatologischen Gesellschaft = Journal of the German Society of Dermatology : JDDG published new progress about 58-97-9. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Category: tetrahydrofurans.

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

Pillon, Monica C.; Frazier, Meredith N.; Dillard, Lucas B.; Williams, Jason G.; Kocaman, Seda; Krahn, Juno M.; Perera, Lalith; Hayne, Cassandra K.; Gordon, Jacob; Stewart, Zachary D.; Sobhany, Mack; Deterding, Leesa J.; Hsu, Allen L.; Dandey, Venkata P.; Borgnia, Mario J.; Stanley, Robin E. published the artcile< Cryo-EM structures of the SARS-CoV-2 endoribonuclease Nsp15 reveal insight into nuclease specificity and dynamics>, Computed Properties of 58-97-9, the main research area is cryoelectron microscopy SARSCoV2 NSP15 conformational dynamics crystal structure.

Abstract: Nsp15, a uridine specific endoribonuclease conserved across coronaviruses, processes viral RNA to evade detection by host defense systems. Crystal structures of Nsp15 from different coronaviruses have shown a common hexameric assembly, yet how the enzyme recognizes and processes RNA remains poorly understood. Here we report a series of cryo-EM reconstructions of SARS-CoV-2 Nsp15, in both apo and UTP-bound states. The cryo-EM reconstructions, combined with biochem., mass spectrometry, and mol. dynamics, expose mol. details of how critical active site residues recognize uridine and facilitate catalysis of the phosphodiester bond. Mass spectrometry revealed the accumulation of cyclic phosphate cleavage products, while anal. of the apo and UTP-bound datasets revealed conformational dynamics not observed by crystal structures that are likely important to facilitate substrate recognition and regulate nuclease activity. Collectively, these findings advance understanding of how Nsp15 processes viral RNA and provide a structural framework for the development of new therapeutics.

Nature Communications published new progress about Catalysis (phosphodiester bonds). 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

Fouad, Hanan Mina; Ahmed Mohamed, Amal; Sabry, Magda; Abdel Aziz, Hossam; Eysa, Basem; Rabea, Mohamed published the artcile< The Effectiveness of Ledipasvir/Sofosbuvir in Youth With Genotype 4 Hepatitis C Virus: A Single Egyptian Center Study.>, COA of Formula: C9H13N2O9P, the main research area is .

BACKGROUND: Licensure of ledipasvir/sofosbuvir for chronic hepatitis C virus (HCV) infection in adolescents was based on clinical trials on patients mainly with genotype 1. We aimed to evaluate the effectiveness and short-term safety of this newly approved antiviral in adolescents with HCV genotype 4. METHODS: This was a study of 51 HCV-infected adolescents, who received the adult dose of ledipasvir/sofosbuvir, once daily for 12 weeks, and were followed-up for 12 weeks post-treatment. Laboratory tests, quantitation of HCV RNA, HCV genotyping, IL-28rs gene polymorphism and transient elastography were performed at baseline. Follow-up visits were done for blood testing and adverse events recording. RESULTS: The mean age was 14.7 ± 1.5 years (11-17.5), with a male to female ratio of 1.7:1. All patients were genotype 4a, and 76.5% had the CC IL-28 gene polymorphism. About 50% gave a history of HCV-infected mother, and 31% were treatment-experienced. Liver stiffness was F0 in 72.5%, F0-F1 in 13.7% and F1-F2 in 13.7%. Adverse events were mainly abdominal pain in 72.5%, headache in 64.7% and diarrhea in 53% of patients; these were mild. A reversible increase in creatinine level with a concomitant decline in estimated glomerular filtration rate was observed in the first month of treatment. By the end of week 12, a significant decline in liver enzymes was observed. All patients achieved an early, end of treatment, and a sustained virologic response. CONCLUSIONS: Adolescent patients with genotype 4 chronic HCV infection achieved a good response rate with good ontreatment tolerability for ledipasvir/sofosbuvir therapy.

The Pediatric infectious disease journal published new progress about 58-97-9. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, COA of Formula: C9H13N2O9P.

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

Qin, Yaqiong; Wang, Bing; Liu, Shaofeng; Pan, Lining; Chen, Mantang; Cui, Huapeng; Liu, Ruihong; Jia, Yunzhen; Cai, Junlan; Liu, Kejian; Wang, Xiaoyu; Xie, Fuwei published the artcile< Robust, comprehensive, sensitive analysis of flavour additives with carboxyl and hydroxyl groups in cigarette smoke combining silylation and gas chromatography-tandem mass spectrometry with an improved backflushing system>, Application In Synthesis of 97-99-4, the main research area is silylation GC MS backflushing system flavor additives; Backflushing; Cigarette smoke; Derivatization; Flavour additives; GC-MS/MS.

Flavor additives with carboxyl and hydroxyl groups (FACHs), the key ingredients in characteristic flavours, are frequently detected in cigarette smoke. They are attracting increasing attention in regulating the flavor additives used in tobacco to curb youth tobacco use and prevent the use of additives that are harmful. In this study, a highly robust, sensitive, and precise method based on silylation and GC-MS/MS with an improved backflushing system was developed for the simultaneous anal. of 171 FACHs in cigarette smoke. Silylation has been shown to have advantages in terms of high selectivity and sensitivity to chems. with carboxyl and hydroxyl groups, especially when combined with GC-MS/MS. The extraction and silylation conditions were optimized. Dichloromethane was used as the extraction agent. BSTFA in combination with 1% TMCS and 0.2% TMSI was selected as silylating agent for high silylation efficiency, particularly for hindered analytes. The method has been validated. The limit of detection (LOD) ranged from 0.6 to 332.3 ng/mL. 91.1% out of the analytes in QC samples had precisions lower than 10% during one month run. The improved backflushing system with a fused silica splitter was shown to be crucial in the excellent long-term robustness of the method. The developed method was used to determine flavor additives in 270 practical cigarette smoke samples with reliable results. A total of 154 FACHs were identified with wide-range levels among different cigarette brands.

Journal of Chromatography A published new progress about Food additives (flavor). 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

Bommana, Sankhya; Richards, Gracie; Kama, Mike; Kodimerla, Reshma; Jijakli, Kenan; Read, Timothy D.; Dean, Deborah published the artcile< Metagenomic shotgun sequencing of endocervical, vaginal, and rectal samples among Fijian women with and without Chlamydia trachomatis reveals disparate microbial populations and function across anatomic sites: a pilot study>, Computed Properties of 58-97-9, the main research area is Chlamydia metagenomics shotgun sequencing endocervix vagina rectum anatomy; Chlamydia trachomatis; endocervical microbiome; metabolomics; metagenomic shotgun sequencing; pathogenesis; rectal microbiome; sexually transmitted infections; vaginal microbiome.

Chlamydia trachomatis is a sexually transmitted pathogen and a global public health concern. Little is known about the microbial composition and function across endocervical, vaginal, and rectal microbiomes in the context of C. trachomatis infection. We evaluated the microbiomes of 10 age-matched high-risk Fijian women with and without C. trachomatis using metagenomic shotgun sequencing (MSS). Lactobacillus iners and Lactobacillus crispatus dominated the vagina and endocervix of uninfected women. Species often found in higher relative abundance in bacterial vaginosis (BV) – Mageeibacillus indolicus, Prevotella spp., Sneathia spp., Gardnerella vaginalis, and Veillonellaceae spp. – were dominant in C. trachomatis-infected women. This combination of BV pathogens was unique to Pacific Islanders compared to previously studied groups. The C. trachomatis-infected endocervix had a higher diversity of microbiota and microbial profiles that were somewhat different from those of the vagina. However, community state type III (CST-III) and CST-IV predominated, reflecting pathogenic microbiota regardless of C. trachomatis infection status. Rectal microbiomes were dominated by Prevotella and Bacteroides, although four women had unique microbiomes with Gardnerella, Akkermansia, Bifidobacterium, and Brachyspira. A high level of microbial similarity across microbiomes in two C. trachomatis-infected women suggested intragenitorectal transmission. A number of metabolic pathways in the endocervix, driven by BV pathogens and C. trachomatis to meet nutritional requirements for survival/growth, 5-fold higher than that in the vagina indicated that endocervical microbial functions are likely more diverse and complex than those in the vagina. Our novel findings provide the impetus for larger prospective studies to interrogate microbial/microbiome interactions that promote C. trachomatis infection and better define the unique genitorectal microbiomes of Pacific Islanders.

Microbiology Spectrum published new progress about Actinobacteria. 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