Month: October 2022

Fan, Yi; Sun, Guangrong; Kaw, Han Yeong; Zhu, Lizhong; Wang, Wei published the artcile< Analytical characterization of nucleotides and their concentration variation in drinking water treatment process>, Quality Control of 58-97-9, the main research area is nucleotide concentration variation solid phase extraction drinking water treatment; Disinfection byproducts (DBPs); Drinking water; Nucleotides; Precursors; Solid phase extraction (SPE); Ultrahigh-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS).

Nucleotides, as the basic building blocks of nucleic acids, widely exist in aqueous environment. In this study, we developed a solid phase extraction-high performance liquid chromatog.-tandem mass spectrometry (SPE-UPLC-MS/MS) method for the anal. of 5′-adenosine monophosphate (AMP), 5′-uridine monophosphate (UMP), 5′-cytidine monophosphate (CMP) and 5′-guanosine monophosphate (GMP). The method achieved limits of detection (LODs) of 0.1-1.0 ng/L, and recoveries of 85-95% for the four tested nucleotides. The occurrence and concentrations of the four nucleotides in water from eight representative drinking water treatment and distribution systems in China were determined using this method. All four nucleotides were detectable in water treatment plant (WTP) influent and effluent, at concentrations of up to 30 ng/L and with occurrence frequency of around 90%. The concentrations of identified nucleotides increased 3-10 times after 10 km of water age in the water distribution system. Biol. filters and coagulation increased the concentrations of nucleotides, conversely, active carbon, ozonation, and ultrafiltration membrane removed nucleotides in water. The effects of active carbon and coagulation were further confirmed using laboratory-controlled experiment In addition, monochlorinated nucleotides were identified as the chlorination products of nucleotides.

Science of the Total Environment published new progress about Coagulation. 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

Niro, Giuliana; Weck, Stefanie C.; Ducho, Christian published the artcile< Merging Natural Products: Muraymycin-Sansanmycin Hybrid Structures as Novel Scaffolds for Potential Antibacterial Agents>, Electric Literature of 58-97-9, the main research area is muraymycin sansanmycin hybrid structure scaffold antibacterial agent; antibiotics; hybrid structures; natural products; nucleosides; structure-activity relationship.

To overcome bacterial resistances, the need for novel antimicrobial agents is urgent. The class of so-called nucleoside antibiotics furnishes promising candidates for the development of new antibiotics, as these compounds block a clin. unexploited bacterial target: the integral membrane protein MraY, a key enzyme in cell wall (peptidoglycan) biosynthesis. Nucleoside antibiotics exhibit remarkable structural diversity besides their uridine-derived core motifs. Some sub-classes also show specific selectivities towards different Gram-pos. and Gram-neg. bacteria, which are poorly understood so far. Herein, the synthesis of a novel hybrid structure is reported, derived from the 5′-defunctionalized uridine core moiety of muraymycins and the peptide chain of sansanmycin B, as a new scaffold for the development of antimicrobial agents. The reported muraymycin-sansanmycin hybrid scaffold showed nanomolar activity against the bacterial target enzyme MraY, but displayed no significant antibacterial activity against S. aureus, E. coli, and P. aeruginosa.

Chemistry – A European Journal published new progress about Antibacterial agent resistance. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Electric Literature of 58-97-9.

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

Xue, Ying; Jin, Wei; Xu, Xian-Shun; Yong, Li; Hu, Bin; Xiong, Jing; Hu, Xue-Mei; Qing, Lin-Sen; Xie, Jing published the artcile< Quality evaluation of Tricholoma matsutake based on the nucleic acid compounds by UPLC-TOF/MS and UPLC-QqQ/MS>, Safety of ((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 Tricholoma nucleic acid UPLC TOF MS Southwest China; Tricholoma matsutake; UPLC-QqQ/MS; UPLC-TOF/MS; nucleic acid compound; quality evaluation.

So far, there has been no quality evaluation of Tricholoma matsutake. Nucleic acid compounds are a kind of functional ingredient in T. matsutake that is beneficial to human health. In this study, a UPLC-TOF/MS method was first used to scan and identify the potential nucleic acid compounds in T. matsutake. Based on the calculation of the mol. formula and subsequent confirmation by authentic standards, 15 nucleic acid compounds were unambiguously identified: adenosine, cytidine, guanosine, inosine, thymidine, uridine, xanthosine dehydrate, 2′- deoxyadenosine, 2′-deoxycytidine, 2′-deoxyguanosine, 2′-deoxyuridine, adenosine 5′- monophosphate, CMP, GMP, and uridine 5′- monophosphate. Then, a UPLC-QqQ/MS method was developed for the subsequent quant. anal. After validating the limits of quantification, detection, precision, repeatability, and recovery through a calibration curve, the content of 15 nucleic acid compounds was determined by the proposed UPLC-QqQ/MS method in 80 T. matsutake samples collected from different regions in Sichuan province, Southwest China. After the statistical anal., we suggest that the total content of nucleic acid compounds in the qualified T. matsutake should be higher than 24.49 mg/100 g. The results indicated that the combined use of UPLC-TOF/MS and UPLC-QqQ/MS is efficient for fast identification and determination of nucleic acid compounds to comprehensively evaluate the quality of T. matsutake.

Molecules published new progress about Nucleic acids Role: THU (Therapeutic Use), BIOL (Biological Study), USES (Uses). 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Safety of ((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

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

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

Behairy, Behairy E.; El-Araby, Hanaa A.; El-Guindi, Mohamed A.; Basiouny, Hosam-Eldin M.; Fouad, Ola A.; Ayoub, Bassam A.; Marei, Ayman M.; Sira, Mostafa M. published the artcile< Safety and Efficacy of 8 Weeks Ledipasvir/Sofosbuvir for Chronic Hepatitis C Genotype 4 in Children Aged 4-10 Years>, Synthetic Route of 58-97-9, the main research area is ledipasvir sofosbuvir antiviral agent hepatitis C virus infection; children; direct-acting antiviral drugs; efficacy; hepatitis C virus; ledipasvir; safety; sofosbuvir.

To evaluate the safety and efficacy of shortened 8-wk regimen of ledipasvir/sofosbuvir (LED/SOF) combination therapy in treatment-naive children without cirrhosis aged 4-10 years of age with chronic hepatitis C virus (HCV) infection. This observational single arm prospective study included 30 treatment-naive children (20 males) with proved chronic HCV fulfilling inclusion criteria. Their body weights ranged from 17 to 26 kg. All the included children received a single oral dose of LED/SOF 45/200 mg for 8 wk. Body weight, HCV-RNA, complete blood count, and liver function tests were monitored at 0, 2, 4, and 8 wk and sustained virol. response was evaluated after 12 wk after treatment (SVR12). The emergence of any side effects was also monitored. The most common risk factor (53.3%) was an parent or sibling with HCV infection. Twenty-nine patients (96.7%) were neg. for HCV-RNA by week 2 of treatment and 1 patient became neg. by week 4. The end of treatment response and SVR12 were 100%. Transaminases levels declined and returned to normal levels by week 2. Major side effects were fatigue in 90% (27/30) and headache in 76.7% (23/30). Side effects were minimal, tolerable, and did not interfere with daily activity or necessitate treatment discontinuation. A shortened 8-wk regimen of LED/SOF (45/200 mg) is safe and effective with 100% SVR12 in treatment-naive children with cirrhosis aged 4-10 years with chronic HCV infection genotype 4.

Journal of Pediatrics (New York, NY, United States) published new progress about Antiviral agents. 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Synthetic Route of 58-97-9.

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>, 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

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

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>, Electric Literature of 97-99-4, 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, Electric Literature of 97-99-4.

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