Month: October 2022

Seifert, Roland; Schirmer, Bastian published the artcile< cCMP and cUMP come into the spotlight, finally>, Reference of 58-97-9, the main research area is cytidylyl uridylyl cyclase identification; base-specificity; cCMP; cUMP; cytidylyl cyclase; second messenger; uridylyl cyclase.

cCMP and cUMP have been identified in numerous biol. systems and proposed to serve as second messengers. However, this proposal remained controversial because of the base-promiscuity of generators, effectors, phosphodiesterases, and bacterial toxins. With the identification of specific cytidylyl and uridylyl cyclases, cCMP and cUMP research enters a new era.

Trends in Biochemical Sciences published new progress about Enzymes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (Uridylyl cyclase). 58-97-9 belongs to class tetrahydrofurans, and the molecular formula is C9H13N2O9P, Reference of 58-97-9.

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

Wang, Zhuangqing; Wang, Xinchao; Zhang, Chao; Arai, Masahiko; Zhou, Leilei; Zhao, Fengyu published the artcile< Selective hydrogenation of furfural to furfuryl alcohol over Pd/TiH2 catalyst>, Recommanded Product: (Tetrahydrofuran-2-yl)methanol, the main research area is palladium titanium hydride catalyst furfural hydrogenation furfuryl alc.

In this work, the selective hydrogenation of furfural to furfuryl alc. has been studied over Pd/TiH2 catalysts. The catalytic performances of several catalysts with different Pd loading (0.2-3% in weight) were discussed, among which a higher selectivity to furfuryl alc. was obtained over 0.5Pd/TiH2 and it gave rise to a 73% furfural alc. selectivity at complete conversion at 60°C. The physicochem. properties of catalysts were well characterized by TEM, XRD, XPS, Raman, TPR and TPD, as well as in-situ DRIFT for the adsorption of the reactant. The size and the electronic state of Pd particles, and the surface defects of catalysts presented significant influence on the catalytic performance. The furfural is preferentially adsorbed with its C = O bond on the boundary of Pd particle and TiH2 support, leading to the high selectivity to furfuryl alc.

Molecular Catalysis published new progress about Adsorption. 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

Beaver, Matthew G.; Zhang, En-xuan; Liu, Zhi-qing; Zheng, Song-yuan; Wang, Bin; Lu, Jiang-ping; Tao, Jian; Gonzalez, Miguel; Jones, Sian; Tedrow, Jason S. published the artcile< Development and Execution of a Production-Scale Continuous [2 + 2] Photocycloaddition>, Recommanded Product: Cyclobuta[1,2-c:3,4-c’]difuran-1,3,4,6(3aH,3bH,6aH,6bH)-tetraone, the main research area is continuous photocycloaddition maleic anhydride ethylene cyclobutane.

This article details the approach to large-scale production of cyclobutane 2 by the continuous-flow [2 + 2] photocycloaddition of maleic anhydride and ethylene, including (1) focused reaction optimization and development of a robust isolation protocol, (2) the approach to equipment design and process safety, and (3) the results of commissioning tests and production runs delivering the target compound at throughputs exceeding 5 kg/day.

Organic Process Research & Development published new progress about Photocycloaddition reaction. 4415-87-6 belongs to class tetrahydrofurans, and the molecular formula is C8H4O6, Recommanded Product: Cyclobuta[1,2-c:3,4-c’]difuran-1,3,4,6(3aH,3bH,6aH,6bH)-tetraone.

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

Li, Feng; Jiang, Shanshan; Huang, Jin; Wang, Yue; Lu, Shiyu; Li, Cuiqin published the artcile< Catalytic transfer hydrogenation of furfural to furfuryl alcohol over a magnetic Fe3O4@C catalyst>, SDS of cas: 97-99-4, the main research area is catalytic transfer hydrogenation furfural furfuryl alc catalyst.

Carbon-encapsulated Fe3O4 (Fe3O4@C) catalysts were prepared by a solvothermal method using glucose as the carbon source and their physicochem. properties were characterized via various anal. techniques. Catalytic transfer hydrogenation of furfural over Fe3O4@C catalysts was investigated with isopropanol as the solvent and hydrogen donor. The Fe3O4@C catalysts exhibited high catalytic furfural transfer hydrogenation activity, selectivity of furfuryl alc., and high reusability. The mechanism of catalytic transfer hydrogenation of furfural by Fe3O4@C obeys the Meerwein-Ponndorf-Verley reduction on a Lewis acid site (Fe3O4).

New Journal of Chemistry published new progress about Meerwein-Ponndorf-Verley reduction. 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

Tong, Zhikun; Li, Xiang; Dong, Jingyu; Gao, Rui; Deng, Qiang; Wang, Jun; Zeng, Zheling; Zou, Ji-Jun; Deng, Shuguang published the artcile< Adsorption Configuration-Determined Selective Hydrogenative Ring Opening and Ring Rearrangement of Furfural over Metal Phosphate>, Quality Control of 97-99-4, the main research area is adsorption configuration hydrogenative ring opening rearrangement furfural metal phosphate.

Developing an economic catalyst to upgrade furfural to alcs. (such as linear alc. and cyclopentanol) is highly significant for fine chem. synthesis and biomass utilization. Here, a class of metal phosphate nanoparticles (such as CoP, Co2P, and Ni2P) with different metal compositions and topol. structures is synthesized. The acidity and hydrogen activation ability were well adjusted according to the types. An 80.2% yield of 1,2,5-pentanetriol was reported for the first time via a hydrogenative ring-opening route over CoP, whereas Ni2P shows a high catalytic efficiency for cyclopentanol with a 62.8% yield via a hydrogenative ring-rearrangement route. Based on the catalytic performance of Pd/C and the result of attenuated total reflectance-IR spectroscopy, the route difference is derived from the adsorption configuration of furfural on the catalyst. After loading on the insert support, the metal phosphate/support catalysts show high activity and stability during the recycling experiments This work provides an effective strategy to regulate the reaction path through an adsorption mechanism and shows the precise synergistic effect of hydrogenation and acid catalysis.

ACS Catalysis published new progress about Acidity. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Quality Control of 97-99-4.

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

Hu, Si; Feng, Xi; Huang, Wen; Ibrahim, Salam A.; Liu, Ying published the artcile< Effects of drying methods on non-volatile taste components of Stropharia rugoso-annulata mushrooms.>, 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 Stropharia non volatile compound hot air vacuum freeze drying.

In this study, the pileus and stipe of Stropharia rugoso-annulata were sep. dehydrated using natural air drying (NAD), hot air drying (HAD) and vacuum freeze drying (VFD), the proximate composition and non-volatile compounds (soluble sugars, organic acids, free amino acids and 5′-nucleotides) were investigated. We found that the contents of free amino acids (37.21-51.07 mg/g) and 5′-nucleotides (18.33-22.76 mg/g) in pileus were higher than those of stipe. The contents of MSG-like amino acids (3.61-11.70 mg/g) and flavor 5′-nucleotides (5.47-5.94 mg/g) in pileus were also higher than those of stipe. The dried S. rugoso-annulata treated with VFD had the highest levels of soluble sugars, organic acids, free amino acids and 5′-nucleotides. We found that NAD and HAD had medium levels of MSG-like amino acids (7.95-11.7 mg/g) and VFD had low levels of MSG-like amino acids (3.16-3.61 mg/g). Moreover, HAD had the highest level of equivalent umami concentration (EUC) value (784.05 g MSG/100 g). Our results suggested that VFD was better to preserve the non-volatile compounds in S. rugoso-annulata, but HAD would be a potential method to produce umami concentration of dried S. rugoso-annulata.

LWT–Food Science and Technology published new progress about Amino acids Role: FFD (Food or Feed Use), BIOL (Biological Study), USES (Uses). 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

Wu, Qi; Ma, Xiaoru; Zheng, Feng; Lu, Xuemin; Lu, Qinghua published the artcile< Synthesis of highly transparent and heat-resistant polyimides containing bulky pendant moieties>, Application In Synthesis of 4415-87-6, the main research area is transparent heat polyimide bulky pendant moiety.

A new diamine with bulky pendant biphenyl and ortho-position di-Me structures, 4,4′-((1,1′-biphenyl)-4-ylmethylene)bis(2,6-dimethylaniline), was synthesized via a one-pot reaction of 4-biphenyl carboxaldehyde and 2,6-dimethylaniline. The diamine was employed to polymerize with several dianhydrides via one-step condensation under high-temperature conditions. The light yellow or colorless polyimide (PI) films obtained were found to have cut-off wavelengths in the range 286-358 nm and transmittance over 80% in the visible region (400-780 nm). Meanwhile, these PIs possessed excellent solubility in common organic solvents, even in low-boiling-point solvents such as chloroform (CHCl3), dichloromethane (CH2Cl2) and THF. The glass transition temperatures (Tg) of the PIs were determined to exceed 343 °C, even to 456 °C. All PI films were flexible with a tensile strength of 78-119 MPa, a Young’s modulus of 2.0-2.5 GPa and elongation at break of 4.0%-8.2%. Therefore, these colorless PIs can be used as candidate materials for flexible display substrates. © 2019 Society of Chem. Industry.

Polymer International published new progress about Boiling point. 4415-87-6 belongs to class tetrahydrofurans, and the molecular formula is C8H4O6, Application In Synthesis of 4415-87-6.

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

Due, Ong The; Chaikledkaew, Usa; Genuino, Anne Julienne M.; Sobhonslidsuk, Abhasnee; Thakkinstian, Ammarin published the artcile< Systematic Review with meta-analysis: efficacy and safety of direct-acting antivirals for chronic hepatitis C genotypes 5 and 6>, 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 chronic hepatitis C genotype direct acting antiviral metaanalysis.

Direct-acting antivirals (DAAs) are modern treatments for chronic hepatitis C infection, but majority of available evidence on its treatment effect covers genotypes 1 to 4. Therefore, the efficacy and safety of DAAs for genotypes 5 and 6 need to be analyzed. Studies were identified from Medline, Scopus, and CENTRAL and a Chinese database CNKI, from inception until Dec 4, 2018. Clin. trials were included if they enrolled patients with genotypes 5 and/or 6 infection, any type of second-generation DAAs was studied, and sustained virol. response was assessed at the 12th week after treatment (SVR12) as outcome measure. Metaanal. using metaprop statistical program was applied for pooling proportions if data were sufficient (i.e., at least 2 studies). Thirteen studies were included in the anal. Four studies assessed the efficacy of four DAA regimens in genotype 5 patients, which were mainly sofosbuvir (SOF) plus pegylated-interferon/ribavirin (PR) or other DAAs, with SVR12 ranging from 94.4% to 100%. Twelve studies assessed the efficacy of seven DAA regimens among genotype 6 patients, but only two DAA regimens (i.e., SOF + PR and SOF/ledipasvir) had sufficient data for pooling. The pooled SVR12 rates (95% CI) were 99.6% (92.2 to 100) for SOF + PR and 99.2% (96.5 to 100) for SOF/ledipasvir. No treatment-related serious adverse event was reported, while the nonserious adverse events were comparable to other genotypes. In conclusion, DAAs are effective and may be safe for the treatment of chronic hepatitis C genotypes 5 and 6. However, our evidence is based on noncomparative studies; hence, further larger-scale randomized controlled trials in these genotypes are still required.

BioMed Research International published new progress about Antiviral agents. 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

Bakharev, Vladimir V.; Gidaspov, Alexander A.; Zalomlenkov, Vladimir A.; Parfenov, Victor E.; Golovina, Olga V.; Slepukhin, Pavel A. published the artcile< Opening of the 1,3,5-triazine ring in 3-methyl-5-(trinitromethyl)tetrazolo[1,5-a][1,3,5]triazin-7-one by the action of alcohols>, Product Details of C5H10O2, the main research area is tetrazolotriazinone ring opening alc.

It was shown for the first time that in the reaction of 3-methyl-5-(trinitromethyl)tetrazolo[1,5-a][1,3,5]triazin-7-one with alcs. in the presence of bases, along with the expected substitution of the trinitromethyl group, opening of the 1,3,5-triazine ring with the addition of an alc. at the site of the C-N bond cleavage takes place. It was found that in the absence of bases only opening of the 1,3,5-triazine ring occurs with the formation of alkyl esters of {1-[(1-methyl-1H-tetrazol-5-yl)imino]-2,2,2-trinitroethyl}carbamic acid, and the trinitromethyl group retains high reactivity and can be substituted by the action of alcs. in the presence of a base.

Chemistry of Heterocyclic Compounds (New York, NY, United States) published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Product Details of C5H10O2.

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

Ruan, Luna; Pei, An; Liao, Jianhua; Zeng, Li; Guo, Guangrong; Yang, Kai; Zhou, Qin; Zhao, Ning; Zhu, Lihua; Chen, Bing Hui published the artcile< Nitrogen-doped carbon nanotubes-supported PdNiCo nanoparticles as a highly efficient catalyst for selective hydrogenation of furfural>, Synthetic Route of 97-99-4, the main research area is furfural selective hydrogenation catalyst.

Nitrogen-doped carbon nanotubes (N-CNTs) was synthesized via covalent functionalization, and the monometallic (Pd/CNTs, Pd/N-CNTs), bimetallic (NiCo/CNTs, NiCo/N-CNTs, PdNi/CNTs, PdCo/CNTs, PdNi/N-CNTs, PdCo/N-CNTs) and trimetallic (PdNiCo/CNTs, PdNiCo/N-CNTs) catalysts were prepared by simple liquid chem. reduction The catalytic performance of as-obtained catalysts was evaluated by furfural hydrogenation. The properties of electron and surface active sites and nanostructures of as-prepared catalysts were characterized. And the relationship between the above-mentioned characteristic textures and catalytic performance of as-synthesized catalysts was further discussed and established. 97.1% Selectivity to tetrahydrofurfuryl alc. could be obtained over PdNiCo/N-CNTs (furfural conversion-100%), but tetrahydrofurfuryl alc. selectivity was only 41.8% when using PdNiCo/CNTs. This investigation confirmed that the catalytic performance of PdNiCo/N-CNTs was much more excellent than other catalysts mainly due to its own PdNiCo alloy nanostructure and the electronic synergy effect between PdNiCo metallic nanoparticles and N-CNTs. Furthermore, there were much weaker basic sites in PdNiCo/N-CNTs, which greatly increased its catalytic properties.

Fuel published new progress about Hydrogenation. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Synthetic Route of 97-99-4.

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