Tag: M.W=250-300

Crotti, Simone; Di Iorio, Nicola; Artusi, Chiara; Mazzanti, Andrea; Righi, Paolo; Bencivenni, Giorgio published the artcile< Direct Access to Alkylideneoxindoles via Axially Enantioselective Knoevenagel Condensation>, Synthetic Route of 112-63-0, the main research area is cyclohexanone oxindole cinchona alkaloid amine catalyst enantioselective Knoevenagel condensation; cyclohexylidene oxindole stereoselective preparation.

The organocatalytic axially enantioselective Knoevenagel condensation between prochiral cyclohexanones and oxindoles is presented. The reaction, promoted by a primary amine, proceeded smoothly and furnished unprecedented examples of novel cyclohexylidene oxindoles displaying axial chirality, e.g., I.

Organic Letters published new progress about Cyclohexanones Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Subramanian, Yuvaraj; Oh, Woong; Choi, Woosung; Lee, Hayeon; Jeong, Mihee; Thangavel, Ranjith; Yoon, Won-Sub published the artcile< Optimizing high voltage Na3V2(PO4)2F3 cathode for achieving high rate sodium-ion batteries with long cycle life>, HPLC of Formula: 112-63-0, the main research area is graphene oxide sodium lithium ion battery soluble gel process.

Sodium-ion batteries have gained an intense attention as a promising alternate for Li-ion batteries due to their low cost, and abundant availability. To meet high energy d. requirements, developing a high voltage cathode with ultra-long cycle life is of great importance. Na3V2(PO4)2F3 (NVPF) features a high working voltage, fast sodium-ion diffusion channels, and small volume change during the cycling process. However, the practical performance of NVPF cathode is currently hindered by poor Na+ ion diffusion at high voltage, low cycle life, and limited rate behavior. Herein, we evaluate the effect of synthesis conditions in sol-gel technique, binders (PVDF, PAI and CMC), and electrolytes (ether, and ester based solvents) to overcome the diffusion limitation in high voltage NVPF cathode. Benefiting from the synergistic effect of CMC binder, and DEGME electrolyte, and reduced graphene oxide composite, NVPF effectively overcome the potential barrier during Na+ ion insertion/extraction at high voltage. NVPF with CMC binder and DEGDME electrolyte displayed a high Na+ ion diffusion kinetics, low cell resistance, and delivered an excellent electrochem. performance. The current study provides new insights for overcoming the kinetic barrier during sodium ion storage in high voltage cathode that could direct the research development towards high energy sodium-ion batteries.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Activation energy. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Kyosiimire-Lugemwa, Jacqueline; Anywaine, Zacchaeus; Abaasa, Andrew; Levin, Jonathan; Gombe, Ben; Musinguzi, Kenneth; Kaleebu, Pontiano; Grosskurth, Heiner; Munderi, Paula; Pala, Pietro published the artcile< Effect of stopping cotrimoxazole preventive thrapy on microbial translocation and inflmmatory markers among human immunodefiiency virus-infected ugandan adults on antiretroviral thrapy: th COSTOP trial immunology substudy>, HPLC of Formula: 112-63-0, the main research area is cotrimoxazole lamivudine antibiotic antiretroviral agent adult inflammation HIV infection; ART; HIV-1; cotrimoxazole preventive therapy; immune activation; inflammation; microbial translocation.

Background. Cotrimoxazole preventive therapy (CPT) in human immunodeficiency virus (HIV) infection is a World Health Organization-recommended standard of care in resource-limited settings, but the mechanism of CPT’s beneficial effects is unclear. The COSTOP trial (ISRCTN44723643) evaluated the noninferiority of discontinuing CPT in stabilized patients on antiretroviral therapy. The COSTOP immunol. substudy was conducted on a subset of COSTOP participants randomized to continue CPT (n = 86) or discontinue CPT (placebo, n = 86) as daily treatment for 1 yr. Methods. We evaluated whether CPT reduces microbial translocation, indicated by the presence of bacterial lipopolysaccharide (LPS) and LPS control factors such as soluble CD14 (sCD14) and endotoxin core antibody (EndoCAb IgM [IgM]) in plasma. Intestinal barrier damage as indicated by plasma intestinal fatty acid binding protein (IFABP), T-cell activation, and the inflammatory markers C-reactive protein (CRP), interleukin 6 (IL-6), and tumor necrosis factor a (TNF-α) were also evaluated. Results. We found no significant change in markers of microbial translocation (LPS, IFABP, sCD14, and T-cell activation), with decreased EndoCAb IgM. There was significant increase in inflammation markers (CRP and IL-6) aftr stopping CPT compared to those who continued CPT. Conclusions. These results add to the evidence of immunol. benefits of CPT among HIV-infected populations in resourcelimited settings. However, no evidence of reducing microbial translocation was observed

Journal of Infectious Diseases published new progress about Adult, mammalian. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Rachwalak, Marta; Rozniewska, Malgorzata; Golebiewska, Justyna; Jakubowski, Tomasz; Sobkowski, Michal; Romanowska, Joanna published the artcile< A practical synthesis of nucleoside 5'-diphosphates from nucleoside 5'-H-phosphonate monoesters>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is nucleotide nucleoside phosphate phosphonate synthesis pyridinium oxidation deoxyribonucleoside.

A simple and convenient synthetic protocols based on H-phosphonate chem. have been developed for the preparation of nucleoside 5′-diphosphates. It consists of oxidation of the silylated H-phosphonate monoesters in pyridine with iodine to produce the corresponding N-pyridinium phosphonate intermediates, followed by their reactions with orthophosphoric acid used as a nucleophile. The added value of the method is that substrates for the reaction, H-phosphonate monoesters, can be prepared in situ from the corresponding nucleosides and used for the next step without isolation. The procedure is simple and applicable to the preparation of various diphosphates of ribo- and deoxyribonucleosides, and their analogs.

Synthetic Communications published new progress about Deoxyribonucleosides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ding, Weijie; Sheng, Jie; Li, Jin; Cheng, Xu published the artcile< Electroreductive 4-pyridylation of unsaturated compounds using gaseous ammonia as a hydrogen source>, Formula: C19H34O2, the main research area is unsaturated compound cyanopyridine electrochem reductive pyridinylation; alkylpyridine preparation.

Electrochem. radical-cross-coupling with ammonia as a terminal reductant was reported in the reactions of α-Keto esters, β-keto esters, α,β-unsaturated esters, and α,β-unsaturated ketones with 4-CN pyridine. More than 50 corresponding pyridylation products were synthesized under constant current conditions using thiourea as an essential promoter to activate the intermediate derived from 4-CN pyridine.

Organic Chemistry Frontiers published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Li, Bin; Ge, Junyue; Liu, Wei; Hu, Dejun; Li, Ping published the artcile< Unveiling spatial metabolome of Paeonia suffruticosa and Paeonia lactiflora roots using MALDI MS imaging>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is metabolome Paeonia root MALDI mass spectrometry; Moutan Cortex; Paeoniae Radix Alba; mass spectrometry imaging; monoterpenes; spatial distribution; tannins.

Summary : Paeonia suffruticosa (PS) and Paeonia lactiflora (PL) belong to the only genus in the family Paeoniaceae. Comparative anal. of the spatial metabolomes of PS and PL has rarely been performed. In this work, combined with multiple matrixes and dual-polarity detection, high mass resolution matrix-assisted laser desorption/ionization MS imaging (MALDI MSI) and MALDI tandem MSI were performed on the root sections of the two Paeonia species. The spatial distributions of many metabolites including monoterpene and paeonol glycosides, tannins, flavonoids, saccharides and lipids were systematically characterized. The ambiguous tissue distribution of the two isomers paeoniflorin and albiflorin were distinguished by tandem MSI using lithium salt doped 2,5-dihydroxybenzoate matrix. In addition, the major intermediates involved in the biosynthetic pathway of gallotannins were successfully localized and visualized in the root sections. High-mass resolution MALDI full-scan MSI provides comprehensive and accurate spatial distribution of metabolites. The anal. power of the technique was further tested in the tandem MSI of two isomers. The ion images of individual metabolites provide chem. and microscopic characteristics beyond morphol. identification, and the detailed spatiochem. information could not only improve our understanding of the biosynthetic pathway of hydrolyzable tannins, but also ensure the safety and effectiveness of their medicinal use.

New Phytologist published new progress about Gallotannins Role: ANT (Analyte), BSU (Biological Study, Unclassified), PUR (Purification or Recovery), THU (Therapeutic Use), ANST (Analytical Study), BIOL (Biological Study), PREP (Preparation), USES (Uses). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Li, Zhenfeng; Lu, Yu; Chen, Pingping; Zeng, Qinghui; Wen, Xin; Wen, Wen; Liu, Yu; Chen, Anqi; Li, Zengxi; Wang, Zhixiang; Zhang, Liaoyun published the artcile< Suppressing shuttle effect by large oxygen-containing crosslinked hyperbranched polyurethane as cathode encapsulated layer for high-performance lithium-sulfur batteries>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is polyurethane lithium sulfur cathode battery encapsulation.

Lithium-sulfur (Li-S) batteries have attracted a lot of attention because of their high energy d., low cost, and environmental friendliness. However, shuttle effect is one of the most obstacles to make the poor cycling performance and inhibit the development of Li-S batteries. Herein, a kind of large oxygen-containing polymer coated cathode, named polyurethane coated carbon-nanotube/sulfur composites (PU@S-CNT), is prepared from sulfur capsulated by the reaction of hyper branched polyether and diisocyanate via a simple “”one-pot”” strategy to impede the shuttle effect. This PU@S-CNT cathode can not only inhibit the dissolution of lithium polysulfides by phys. barrier, but also can absorb the lithium polysulfides by the chem. effect. Especially, the cell with PU@S-CNT electrode shows an excellent initial cycling capacity of 892 mAh g-1 at 2C and remarkable capacity retention (a low decay rate of 0.051% per cycle at 2C after 450 cycles). More importantly, this coated cathode (PU@S-CNT) demonstrates a good inhibition of shuttle effect, high transmission speed of lithium ion and good cycle reversibility. This work exhibits the cross-linked hyper branched polyurethane is used as coatings of the sulfur cathode for the first time, which can reveal a potential prospect of high-level heteroatom doped coated cathodes for high-performance lithium-sulfur batteries.

Electrochimica Acta published new progress about Battery cathodes. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yayik, Nihan; Perez, Maria; Molins, Elies; Bosch, Joan; Amat, Mercedes published the artcile< Studies on the enantioselective synthesis of E-ethylidene-bearing spiro[indolizidine-1,3'-oxindole] alkaloids>, Quality Control of 112-63-0, the main research area is ethylidene bearing spiro indolizidine oxindole alkaloid enantioselective preparation; alkaloids; ethylidene; oxindoles; spiro compounds.

A synthetic route for the enantioselective construction of the tetracyclic spiro[indolizidine-1,3′-oxindole] framework present in a large number of oxindole alkaloids, with a cis H-3/H-15 stereochem., a functionalized two-carbon substituent at C-15, and an E-ethylidene substituent at C-20, was reported. The key steps of the synthesis were the generation of the tetracyclic spirooxindole ring system by stereoselective spirocyclization from a tryptophanol-derived oxazolopiperidone lactam, the removal of the hydroxymethyl group, and the stereoselective introduction of the E-ethylidene substituent by acetylation at the α-position of the lactam carbonyl, followed by hydride reduction and elimination. Following this route, the 21-oxo derivative of the enantiomer of the alkaloid 7(S)-geissoschizol oxindole was prepared

Molecules published new progress about Diastereoselective synthesis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Saadatian, Mohammad; Mohammad, Rizgar Hassan; Jumaah, Amjad Ahmad; Oagaz, Jeger Ali published the artcile< Evaluation of nutritional value, fatty acids and polyphenols profiles of Pyrus amygdaliformis L. grown in north-east Kurdistan regional government, Iraq>, Related Products of 112-63-0, the main research area is Pyrus fatty acid polyphenol nutritional value Iraq; Pyrus; chlorogenic acid; natural resource; phenolic compounds; tricosanoic acid.

The present research evaluated some chem. composition in tissues from the leaves, seed, and fruits P. amygdaliformis. In leaf samples, phenolics compounds are predominated, whereas, in fruit samples, sugars, organic acid predominated. Among phenolic compounds, chlorogenic acid and fumaric acid were found in the highest amount in leaf tissue. In addition, the amounts of minerals in the fruit tissue had high values. In the P. amigdaliformis seed oil, oleic and linoleic acid were the primary fatty acids. This study shows that these wild pears have beneficial natural compounds and can also be used as a new source of natural oil.

Journal of Oleo Science published new progress about Edible oils Role: FFD (Food or Feed Use), BIOL (Biological Study), USES (Uses). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Swiha, Mina M.; Sutherland, Duncan E. K.; Sistani, Golmehr; Khatami, Alireza; Abazid, Rami M.; Mujoomdar, Amol; Wiseman, Daniele P.; Romsa, Jonathan G.; Reid, Robert H.; Laidley, David T. published the artcile< Survival predictors of 177Lu-Dotatate peptide receptor radionuclide therapy (PRRT) in patients with progressive well-differentiated neuroendocrine tumors (NETS)>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is peptide receptor radionuclide therapy progressive neuroendocrine tumor; Lu-Dotatate; Neuroendocrine; PRRT; Prognostic factors; Survival predictors.

177Lu-Dotatate is an emerging treatment modality for patients with unresectable or metastatic well-differentiated NETs. This study examines survival predictors in patients who received 177Lu-Dotatate. A retrospective single-center review was conducted, examining 47 individuals with progressive well-differentiated NETs treated with 177Lu-Dotatate (four induction cycles of 5.5 GBq at 10-wk intervals followed by eight maintenance cycles of 3.7 GBq at 6-mo intervals). Median follow-up was 63.1 mo with a median progression-free survival (PFS) of 34.1 mo. However, median overall survival (OS) was not reached at the time of anal. The presence of ≥ 5 bone metastases (hazard ratio HR 4.33; p = 0.015), non-gastroenteropancreatic (non-GEP) NETs (HR 3.22; p = 0.025) and development of interim ascites (HR 3.15; p = 0.047) independently predicted a worse OS. Patients with chromogranin A of 1774 × upper limit of normal (ULN) had shorter OS (p < 0.001) and PFS (p = 0.004). Similarly, those with pre-existing ascites demonstrated a worse OS (p = 0.009) and PFS (p = 0.026). Liver metastases involving greater than 50% liver volume and the existence of unusual metastatic locations had a neg. impact on OS (p = 0.033) and PFS (p = 0.026), resp. High burden of skeletal and hepatic metastases, non-GEP-NETs, chromogranin A of ≥ 4 × ULN, unusual metastatic sites, pre-existing and interim ascites are predictors of poor outcomes in patients treated with 177Lu-Dotatate. These common indicators can be used for the risk stratification and identification of patients most likely to benefit from PRRT. Journal of Cancer Research and Clinical Oncology published new progress about Alpers-Huttenlocher syndrome. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics