Tag: M.W:300-400

Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is Ji, Yichen, once mentioned the application of 585-88-6, Name is Maltitol, molecular formula is C12H24O11, molecular weight is 344.3124, MDL number is MFCD00006600, category is Tetrahydropyrans. Now introduce a scientific discovery about this category, Category: Tetrahydropyrans.

Dehydra-decyclization of tetrahydrofurans to diene monomers over metal oxides

The dehydra-decyclization of tetrahydrofuran (THF) to butadiene was investigated over a series of metal oxide catalysts, where a common set of chemical pathways was identified. Alongside butadiene, propene is formedviaa retro-Prins condensation as the main side product typically observed. Reaction occurred at similar temperatures on each of the oxides, but tetragonal zirconia (t-ZrO2) and monoclinic zirconia (m-ZrO2) were unique in showing high selectivity to butadiene (>90%). Near quantitative yields to butadiene could be achieved over t-ZrO(2)at 673 K and a WHSV of 0.93 g THF gcat(-1)h(-1). Through contact time studies, butadiene is determined to be a primary product. Methyl-substituted THF gave only moderate increases in rates and the products showed minimal isomerization of the carbon backbone. The t-ZrO(2)catalyst was found to be relatively stable with time on stream, experiencing coking as a likely source of deactivation. Complete regeneration of the catalyst was demonstrated through calcination alone, allowing for multiple regenerations with no irreversible loss in activity or selectivity. The catalytic activity of zirconia was found to be structure insensitive, with t-ZrO(2)and m-ZrO(2)exhibiting similar initial activities; however, m-ZrO(2)was observed to deactivate much more rapidly.

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Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

Synthetic Route of 64519-82-0, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. 64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, SMILES is OCC(O)[C@@H](O)[C@H](O)[C@H](O)CO[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1, belongs to Tetrahydropyrans compound. In a article, author is Huang, Hui, introduce new discover of the category.

Thiamine-Mediated Cooperation Between Auxotrophic Rhodococcus ruber ZM07 and Escherichia coli K12 Drives Efficient Tetrahydrofuran Degradation

Tetrahydrofuran (THF) is a universal solvent widely used in the synthesis of chemicals and pharmaceuticals. As a refractory organic contaminant, it can only be degraded by a small group of microbes. In this study, a thiamine auxotrophic THF-degrading bacterium, Rhodococcus ruber ZM07, was isolated from an enrichment culture H-1. It was cocultured with Escherichia coli K12 (which cannot degrade THF but can produce thiamine) and/or Escherichia coli K12 Delta thiE (which can neither degrade THF nor produce thiamine) with or without exogenous thiamine. This study aims to understand the interaction mechanisms between ZM07 and K12. We found that K12 accounted for 30% of the total when cocultured and transferred with ZM07 in thiamine-free systems; in addition, in the three-strain (ZM07, K12, and K12 Delta thiE) cocultured system without thiamine, K12 Delta thiE disappeared in the 8th transfer, while K12 could still stably exist (the relative abundance remained at approximately 30%). The growth of K12 was significantly inhibited in the thiamine-rich system. Its proportion was almost below 4% after the fourth transfer in both the two-strain (ZM07 and K12) and three-strain (ZM07, K12, and K12 Delta thiE) systems; K12 Delta thiE’s percentage was higher than K12’s in the three-strain (ZM07, K12, and K12 Delta thiE) cocultured system with exogenous thiamine, and both represented only a small proportion (less than 1% by the fourth transfer). The results of the coculture of K12 and K12 Delta thiE in thiamine-free medium indicated that intraspecific competition between them may be one of the main reasons for the extinction of K12 Delta thiE in the three-strain (ZM07, K12, and K12 Delta thiE) system without exogenous thiamine. Furthermore, we found that ZM07 could cooperate with K12 through extracellular metabolites exchanges without physical contact. This study provides novel insight into how microbes cooperate and compete with one another during THF degradation.

Synthetic Route of 64519-82-0, The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 64519-82-0 is helpful to your research.

Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, molecular formula is C12H24O11. In an article, author is Self, Ethan C.,once mentioned of 64519-82-0, COA of Formula: C12H24O11.

Solvent-Mediated Synthesis of Amorphous Li3PS4/Polyethylene Oxide Composite Solid Electrolytes with High Li+ Conductivity

Solvent-mediated routes have emerged as an effective, scalable, and low-temperature method to fabricate sulfide-based solid-state electrolytes. However, tuning the synthesis conditions to optimize the electrolyte’s morphology, structure, and electrochemical properties is still underexplored. Here, we report a new class of composite solid electrolytes (SEs) containing amorphous Li3PS4 synthesized in situ with a poly(ethylene oxide) (PEO) binder using a one-pot, solvent-mediated route. The solvent and thermal processing conditions have a dramatic impact on the Li(3)P(S)4 structure. Conducting the synthesis in tetrahydrofuran resulted in crystalline beta-Li3PS4 whereas acetonitrile led to amorphous Li3PS4. Annealing at 140 degrees C increased the Li+ conductivity of an amorphous composite (Li3PS4 + 1 wt % PEO) by 3 orders of magnitude (e.g., from 4.5 x 10(-9) to 8.4 x 10(-6) S/cm at room temperature) because of: (i) removal of coordinated solvent and (ii) rearrangement of the polyanionic network to form P2S74- and PS43- moieties. The PEO content in these composites should be limited to 1-5 wt % to ensure reasonable Li+ conductivity (e.g., up to 1.1 x 10(-4) S/cm at 80 degrees C) while providing enough binder to facilitate scalable processing. The results of this study highlight a new strategy to suppress crystallization in sulfide-based SEs,, which has important implications for solid-state batteries.

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Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter.64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, SMILES is OCC(O)[C@@H](O)[C@H](O)[C@H](O)CO[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1, belongs to Tetrahydropyrans compound. In a document, author is Shi, Zhiyuan, introduce the new discover, Name: (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol.

Striking effect of carbon nanotubes on adjusting sc-CO2 foaming performance of PS/LLDPE blends and forming semi-open cellular structure

The effect of carbon nanotubes (CNTs) on the phase structure and foaming performance of PS/LLDPE blends during batch foaming of sc-CO2 was studied. It was found that the phase structure of PS/LLDPE = 50/50 blends with CNTs could be transformed from bi-continuous to sea-island morphology, when a sufficient quantity of CNTs nanofillers was added. As a result, the foaming ability of PS/LLDPE = 50/50 blends was improved effectively. Meanwhile, the critical value of CNTs for significantly improving the foaming ability of blends decreased slightly with the increase of foaming temperature. In contrast, for the PS/LLDPE blends with sea-island phase structure (such as 20/80), the addition of CNTs did not significantly change the morphology and foaming capacity of the blends. Very interestingly, the foam with semi-open cellular structure (meaning that there were small pores within the large cell wall) was obtained in the foamed PS/LLDPE blends after tetrahydrofuran (THF) etching PS phase. Benefiting from the interfacial channel effect formed by the presence of CNTs, the etching speed and efficiency of PS were significantly improved, and the size for the small pore on the cell wall could be adjusted by the content of PS dispersed phase in the PS/LLDPE/CNTs nanocomposites.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 64519-82-0 is helpful to your research. Name: (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol.

Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

Synthetic Route of 499-40-1. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 499-40-1, Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal

Luminescence and electroluminescence of Al(III), B(III), Be(II) and Zn(II) complexes with nitrogen donors

Blue luminescent complexes of aluminum(III), boron(III), beryllium(II) and zinc(II) using ligands that contain only nitrogen donor atoms are presented. The ligands in these complexes are based on di-2-pyridylamine and 7-azaindole. Complexes containing derivatives of 7-azaindole and di-2-pyridylamine are described. Electroluminescent properties for some of the promising compounds are also discussed.

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Reference£º
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 499-40-1, C12H22O11. A document type is Article, introducing its new discovery., Product Details of 499-40-1

CRYSTAL STRUCTURE OF BIS(2-AMINOETHYL)AMINE(DI-2-PYRIDYLAMINE)ZINC(II)NITRATE AND THE ELECTRONIC PROPERTIES OF THE COPPER(II)-DOPED SYSTEM

The crystal structure of the title compound 2 has been determined by X-ray crystallographic analysis using photographic data.The complex crystallises in the monoclinic space group P21/c, with a=12.34(5), b=16.26(5), c=9.92(5) Angstroem, beta=92.0(5)o, and Z=4.The zinc(II) ion is five-co-ordinate with a distorted trigonal-bipyramidal stereochemistry, the mean out-of-plane and in-plane Zn-N bond distances being 2.20 and 2.09 Angstroem respectively.The e.s.r. and electronic spectra of 1percent copper-doped 2 have been determined using polycrystalline samples and single-crystal techniques and the results interpreted to suggest that the stereochemistry of the doped CuN5 chromophore corresponds closely to that observed in the isomorphous 2 complex, rather than to the stereochemistry of the ZnN5 chromophore of the host lattice.Caution is expressed over the use of the Zn-N distances and N-Zn-N angles to describe the stereochemistry of the CuNx chromophore when doped into isomorphous zinc(II) complexes as host lattices and the use of the electronic reflectance spectra of copper(II)-doped zinc(II) complexes as a criterion for comparable stereochemistries is advocated.A comparison of the g and A factors and one-electron orbital energies is made with other very distorted copper(II) systems.

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Related Products of 499-40-1, An article , which mentions 499-40-1, molecular formula is C12H22O11. The compound – (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal played an important role in people’s production and life.

Half-sandwich Ru(II) halogenido, valproato and 4-phenylbutyrato complexes containing 2,2?-dipyridylamine: Synthesis, characterization, solution chemistry and in vitro cytotoxicity

Halogenido and carboxylato Ru(II) half-sandwich complexes of the general composition [Ru(eta6-p-cym)(dpa)X]PF6 (1-5) were prepared and thoroughly characterized with various techniques (e.g., mass spectrometry, NMR spectroscopy and X-ray analysis); dpa = 2,2?-dipyridylamine; p-cym = p-cymene; X = Cl- (for 1), Br- (for 2), I- (for 3), valproate(1-) (for 4) or 4-phenylbutyrate(1-) (for 5). A single-crystal X-ray analysis showed a pseudo-octahedral piano-stool geometry of [Ru(eta6-p-cym)(dpa)I]PF6 (3), with a eta6-coordinated p-cymene, bidentate N-donor dpa ligand and iodido ligand coordinated to the Ru(II) atom. The results of the 1H-NMR solution behaviour studies proved that the complexes 1-5 hydrolyse were in the mixture of solvents used (10% MeOD-d4/90% D2O). Complexes 1-5 were in vitro inactive against the A2780 human ovarian carcinoma cell line, up to the highest tested concentration (IC50 > 100 muM).

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Electric Literature of 499-40-1, Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.499-40-1, Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal, molecular formula is C12H22O11. In a patent, introducing its new discovery.

Towards selective ethylene tetramerization

And the magic number is… . A large amount of oligomer-free 1-octene (99.9%) was produced from ethylene by a catalytic system based on chromium during the formation of polyethylene wax [see GC-MS chromatogram; the other three significant peaks are methanol (quenching agent), ethyl acetate (needle-rinsing agent), and toluene (solvent)]. Copyright

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Related Products of 10343-06-3, An article , which mentions 10343-06-3, molecular formula is C14H20O10. The compound – 2,3,4,6-Tetra-o-acetyl-D-glucopyranose played an important role in people’s production and life.

60. Derives de desoxy-hydroxylamino-sucres et radicaux libres diglycosylnitroxydes correspondants

A number of sugar aldonitrones, including C,N-diglycosylnitrones, and ketonitrones have been treated with Grignard reagents or cyanide anion leading to the corresponding deoxy-hydroxylamino-sugars.On oxidation (air, H5IO6 or PbO2), these compounds gave the corresponding nitroxide radicals whose ESR. spectra are reported.Analogues of disaccharides, in which the interglycosidic O-bridge is replaced by a hydroxyimino group, have been obtained by reacting a partially blocked sugar bearing a free hemiacetal group either with a deoxy-hydroxylamino-sugar or with hydroxylamine, followed by reaction with an aldehydosugar and a reducing agent (NaBH4).These reactions represents the key synthetic steps for the oligosaccharide-type synthesis of deoxy-hydroxyimino-oligosaccharides.Their oxidation yielded the corresponding nitroxide radicals whose ESR. spectra gave information on the conformation about the ‘interglycosidic’ bridge.This type of compounds should constitute useful spin markers for biological studies.

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Synthetic Route of 10034-20-5, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 10034-20-5, C14H22ClNO9. A document type is Article, introducing its new discovery.

Synthesis of the monosaccharide units of the O-specific polysaccharide of Shigella sonnei

The monosaccharide components of the O-specific polysaccharide 1 of the lipopolysaccharide of the enteropathogenic bacterium Shigella sonnei were synthesized as their methyl glycosides 2 and 3 in their natural anomeric form. The key intermediate to the diaminotrideoxygalactose derivative 2 was ethyl-3-O-acetyl-2-deoxy-2-phthalimido-1-thio-beta-D- glucopyranoside (9) that was converted to its ditosylate 10. Regioselective deoxygenation at C-6 followed by nucleophilic displacement of the secondary tosyloxy group by azide afforded the 4-azido thioglycoside 13. Methyl trifluoromethanesulfonate-assisted methanolysis of 13 gave the O-glycoside 14. Replacement of the phthalimido by an acetamido group followed by catalytic reduction of the azido group led to the diamino-trideoxygalactose derivative 2. The precursor to the L-altruronic acid derivative 3 was methyl alpha-L-glucopyranoside (19) that was routinely converted to the benzylidene-protected 2,3-anhydro-allopyranoside 22. Regioselective opening of the epoxide ring by NaN3 afforded the 2-azido derivative 23 that was benzylated at HO-3. Hydrolytic removal of the benzylidene group followed by TEMPO oxidation of C-6 and subsequent esterification with MeI gave the key L-azido-altruronic acid intermediate 29 that was transformed to the acetamido-altruronic acid derivative 3. High resolution NMR data of the altruronic acid derivatives indicate that the conformation of their pyranose ring is crucially dependent on the substitution pattern: the 2-azido altruronic acid derivatives prefer the 4C1 conformation whereas the 2-acetamido congeners exist preferentially in the 1C4 conformation.

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics