Month: October 2022

Prasad, Girija; Hanna, Patrick E.; Noland, Wayland E.; Venkatraman, Shankar published the artcile< 18-Crown-6 as a catalyst in the dialkylation of o-nitrophenacyl derivatives>, Related Products of 30095-98-8, the main research area is alkylation nitrophenacyl compound 18crown6 catalyst; catalyst crown ether dialkylation nitrophenacyl.

The dialkylation of o-nitrophenacyl ketones, o-nitrophenylacetate esters, and o-nitrophenylacetonitrile with alkyl halides and potassium tert-butoxide proceeds in good yields with 18-crown-6 as catalyst.

Journal of Organic Chemistry published new progress about Alkylation. 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Related Products of 30095-98-8.

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

Xu, Meng; Chigumira, Tafadzwa; Chen, Ziheng; Tones, Jason; Zhao, Rongwei; Dahl, Kris Noel; Chenoweth, David M.; Zhang, Huaiying published the artcile< CRISPR Cas13-based tools to track and manipulate endogenous telomeric repeat-containing RNAs in live cells>, Application In Synthesis of 112-63-0, the main research area is U2OS cell TERRA telomere CRISPR Cas13; CRISPR Cas13; RNA imaging; TERRA; chemical dimerizer; lncRNA; telomere.

TERRA, TElomeric Repeat-containing RNA, is a long non-coding RNA transcribed from telomeres. Emerging evidence indicates that TERRA regulates telomere maintenance and chromosome end protection in normal and cancerous cells. However, the mechanism of how TERRA contributes to telomere functions is still unclear, partially owing to the shortage of approaches to track and manipulate endogenous TERRA mols. in live cells. Here, we developed a method to visualize TERRA in live cells via a combination of CRISPR Cas13 RNA labeling and SunTag technol. Single-particle tracking reveals that TERRA foci undergo anomalous diffusion in a manner that depends on the timescale and telomeric localization. Furthermore, we used a chem.-induced protein dimerization system to manipulate TERRA subcellular localization in live cells. Overall, our approaches to monitor and control TERRA locations in live cells provide powerful tools to better understand its roles in telomere maintenance and genomic integrity.

Frontiers in Molecular Biosciences published new progress about Animal gene Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (TERRA). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application In Synthesis of 112-63-0.

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

Shang, Ya-Jing; Qian, Yi-Ping; Liu, Xiao-Da; Dai, Fang; Shang, Xian-Ling; Jia, Wen-Qiang; Liu, Qiang; Fang, Jian-Guo; Zhou, Bo published the artcile< Radical-Scavenging Activity and Mechanism of Resveratrol-Oriented Analogues: Influence of the Solvent, Radical, and Substitution>, Related Products of 112-63-0, the main research area is radical scavenging resveratrol oriented analog solvent substitution.

Resveratrol (3,5,4′-trihydroxy-trans-stilbene, 3,5,4′-THS) is a known natural antioxidant and cancer chemopreventive agent that has attracted much interest in the past decade. To find a more active antioxidant and study the antioxidative mechanism with resveratrol as the lead compound, the authors synthesized 3,5-dihydroxy-trans-stilbene (3,5-DHS), 4-hydroxy-trans-stilbene (4-HS) 3,4-dihydroxy-trans-stilbene (3,4-DHS), 4,4′-dihydroxy-trans-stilbene (4,4′-DHS), 4-hydroxy-3-methoxy-trans-stilbene (3-MeO-4-HS), 4-hydroxy-4′-methoxy-trans-stilbene (4′-MeO-4-HS), 4-hydroxy-4′-methyl-trans-stilbene (4′-Me-4-HS), 4-hydroxy-4′-nitro-trans-stilbene (4′-NO2-4-HS), and 4-hydroxy-4′-trifluoromethyl-trans-stilbene (4′-CF3-4-HS). The radical-scavenging activity and detailed mechanism of resveratrol and its analogs (ArOHs) were studied by the reaction kinetics with galvinoxyl (GO·) and 2,2-diphenyl-1-picrylhydrazyl (DPPH·) radicals in ethanol and Et acetate at 25 °C, using UV-visible spectroscopy. The reaction rates increase with increasing the electron-rich environment in the mols., and the compound bearing o-dihydroxyl groups (3,4-DHS) is the most reactive one among the examined resveratrol analogs. The effect of added acetic acid on the measured rate constant for GO·-scavenging reaction reveals that in ethanol that supports ionization solvent besides hydrogen atom transfer (HAT), the kinetics of the process is partially governed by sequential proton loss electron transfer (SPLET). In contrast to GO·, DPPH· has a relatively high reduction potential and therefore enhances the proportion of SPLET in ethanol. The relatively low rate constants for the reactions of ArOHs with GO· or DPPH· in Et acetate compared with the rate constants in ethanol prove that in Et acetate these reactions occur primarily by the HAT mechanism. The contribution of SPLET and HAT mechanism depends on the ability of the solvent to ionize ArOH and the reduction potential of the free radical involved. Also, the fate of the ArOH-derived radicals, i.e., the phenoxyl radicals, was studied by the oxidative product anal. of ArOHs and GO· in ethanol. The major products were dihydrofuran dimers in the case of resveratrol, 4,4′-DHS, and 4-HS and a dioxane-like dimer in the case of 3,4-DHS. It is suggested from the oxidative products of these ArOHs that the hydroxyl group at the 4-position is much easier to subject to oxidation than other hydroxyl groups, and the dioxane-like dimer is formed via an o-quinone intermediate.

Journal of Organic Chemistry published new progress about Antioxidants. 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

Yousaf, Zeshan; Morrison, Neil F.; Parnell, William J. published the artcile< Tensile properties of all-polymeric syntactic foam composites: Experimental characterization and mathematical modelling>, Electric Literature of 112-63-0, the main research area is polyurethane syntactic foam composite math modeling tensile property.

All-polymer syntactic foams are studied under large strain cyclic and monotonic tensile loading in order to reveal their tensile stress-strain behavior, recoverability, tensile strength, and elongation at break. The syntactic foam under study here consists of hollow thermoplastic microspheres (HTMs) of two distinct grades (551 and 920), with distributions of mean-wall thicknesses and diameters, embedded inside a polyurethane matrix in various volume fractions. Cyclic loading-unloading curves are recorded, revealing the level of viscoelasticity exhibited by the materials (which becomes a stronger effect with increasing volume fractions of HTMs) and indicating the level of repeatability of loading under large strain. Samples are also subjected to monotonic tensile loading in order to study their elongation at break. Higher volume fractions of HTMs increase the stiffness of the material and while it is observed that the materials are highly elastic over a wide range of tensile strains, damage arises at lower levels of strain for more highly filled materials. The HTM syntactic foams thus exhibit lower breaking strains compared to the neat matrix, which is attributed to matrix-microsphere interfacial debonding. Furthermore, by employing optimization techniques, linear elastic properties of the microspheres and an average shell thickness of the 551 grade are inferred by comparing exptl. results to predictions from the Generalized Self-Consistent Method, incorporating polydispersity data on the size distribution of the microspheres. These results complement previous work which involved direct exptl. measurements of the 920 grade shell thickness. Results also indicate that the characterization of microsphere properties is not critically dependent on access to high resolution microsphere diameter distribution data, provided that an accurate representative mean diameter is known. Finally, the thermal degradation of the samples is studied by using thermogravimetric anal. (TGA) which reveals that HTMs can be added to a polyurethane matrix without significantly affecting the thermal stability of the matrix material.

Composites, Part B: Engineering published new progress about Bulk modulus. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Zhang, Dehui; Zheng, Hongchao; Wang, Xiaodong published the artcile< General and cost-effective synthesis of 1-heteroaryl/arylcycloalkylamines and their broad applications>, SDS of cas: 112-63-0, the main research area is heteroaryl aryl cycloalkylamine preparation.

A general and cost-effective route has been developed to synthesize 1-heteroaryl-substituted cycloalkylamines from readily available heteroarylacetate in good yields. This synthesis features a LHMDS promoted cyclization and one-pot hydrolysis/Curtius rearrangement. This route can be easily carried out on multi-gram scale and be also used to prepare 1-aryl-substituted cycloalkyl/cycloheteroalkylamines. 1-Heteroaryl/aryl-substituted cycloalkyl/cycloheteroalkylamines are versatile building blocks and their applications in organic and medicinal chem. have been demonstrated in the synthesis of morpholine and N-methylpiperazine analogs and a known Rho kinase inhibitor compound

Tetrahedron published new progress about Alicyclic amines Role: SPN (Synthetic Preparation), PREP (Preparation). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.

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

Browne, Duncan L.; Baumann, Marcus; Harji, Bashir H.; Baxendale, Ian R.; Ley, Steven V. published the artcile< A new enabling technology for convenient laboratory scale continuous flow processing at low temperatures>, Product Details of C19H34O2, the main research area is boronic acid synthesis laboratory continuous flow cryogenic reactor design; boration aryl halide continuous flow cryogenic reactor laboratory mesoscale.

A new machine for conducting continuous flow processes at low temperatures on a laboratory scale is reported. The use of this cryogenic flow reactor has been demonstrated by the preparation of a variety of (hetero)aromatic boronic acids and esters via lithium halogen exchange chem. Furthermore, scale-up of the reaction conditions not only demonstrates the application of this device for the preparation of useful building blocks but also combines the ability to process n-butyllithium directly through pump heads attached to the unit.

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

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

Gourang Patnaik, Sai; Escher, Ines; Ferrero, Guillermo A.; Adelhelm, Philipp published the artcile< Electrochemical Study of Prussian White Cathodes with Glymes - Pathway to Graphite-Based Sodium-Ion Battery Full Cells>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is diglyme prussian white sodium ion battery microstructure stability.

Prussian white (PW) cathodes exhibit extremely fast rate kinetics for sodium ion (Na+) insertion/de-insertion at relatively high potentials. However, one of the major bottlenecks is to pair them with appropriate anode materials having similar rate kinetics. Herein, the combination of graphite anodes and several glyme-based electrolytes as appropriate building blocks for PW cathodes to achieve high power d. without compromising on energy d. is reported. Low defect, Na-rich PW is synthesized, and its electrochem. behavior is studied with conventional carbonate-based electrolytes as well as with diglyme (2G), tetraglyme (4G) and a 1 : 1 mixture of 2G and 4G. The stability of the electrolytes is also monitored via in situ (operando) pressure cell measurements. Graphite | electrolyte | PW cells are then studied in both two and three electrode configurations. It was found that glymes are compatible with the graphite/PW electrode pair and the resulting cells exhibit very good cyclability and rate capability.

Batteries & Supercaps published new progress about Crystallinity. 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

Di Grandi, Martin J.; Berger, Dan M.; Hopper, Darrin W.; Zhang, Chunchun; Dutia, Minu; Dunnick, Alejandro L.; Torres, Nancy; Levin, Jeremy I.; Diamantidis, George; Zapf, Christoph W.; Bloom, Jonathan D.; Hu, YongBo; Powell, Dennis; Wojciechowicz, Donald; Collins, Karen; Frommer, Eileen published the artcile< Novel pyrazolopyrimidines as highly potent B-Raf inhibitors>, Product Details of C19H34O2, the main research area is cancer B Raf inhibitor indazole pyrazolopyrimidine derivative SAR preparation.

A novel series of pyrazolo[1,5-a]pyrimidines bearing a 3-hydroxyphenyl group at C(3) and substituted tropanes at C(7) have been identified as potent B-Raf inhibitors. Exploration of alternative functional groups as a replacement for the C(3) phenol demonstrated indazole to be an effective isostere. Several compounds possessing substituted indazole residues, such as 4e, 4p, and 4r, potently inhibited cell proliferation at submicromolar concentrations in the A375 and WM266 cell lines, and the latter two compounds also exhibited good therapeutic indexes in cells.

Bioorganic & Medicinal Chemistry Letters published new progress about Antiproliferative agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.

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

Yan, Bao-Fei; Chen, Xi; Chen, Ya-Fang; Liu, Sheng-Jin; Xu, Chen-Xin; Chen, Ling; Wang, Wen-Bo; Wen, Ting-Ting; Zheng, Xian; Liu, Jia published the artcile< Aqueous extract of Paeoniae Radix Alba (Paeonia lactiflora Pall.) ameliorates DSS-induced colitis in mice by tunning the intestinal physical barrier, immune responses, and microbiota>, Related Products of 112-63-0, the main research area is Paeonia lactiflora extract DSS induced colitis immune response microbiota; Aqueous extract of paeoniae radix alba; Gut microbiota; IL-23/IL-17 axis; Intestinal barrier; Tight junction; Ulcerative colitis.

Ulcerative colitis (UC) is a chronic non-specific intestinal inflammatory disease, the pathogenesis of which is strongly associated with the compromised intestinal barrier. Paeoniae Radix Alba (PRA), the root of Paeonia lactiflora Pall., is a well-known traditional Chinese medicine and an adaptogen used in Hozai, exhibiting appreciable anti-inflammatory and immunomodulatory activity. Nevertheless, the role and mechanism of PRA in UC have yet to be elucidated. Aim of the study: This study was set out to examine the ameliorative effects of the aqueous extract of PRA (i.e., PRA dispensing granule, PRADG) on dextran sulfate sodium (DSS)-induced colitis. The chem. components of PRADG was analyzed by HPLC. Colitis model mice were induced by free access to water containing 2.5% DSS for 10 consecutive days, and concurrently, PRADG (0.1025 and 0.41 g/kg) or Salazosulfapyridine (SASP, 450 mg/kg) was given orally from day 1-10. Body weight, disease activity index (DAI), colon length, histol. scoring, and inflammatory response were assessed. Addnl., IL-23/IL-17 axis and tight junction (TJ) proteins, as well as gut microbiota were also investigated under the above-mentioned regimen. Eight main chem. constituents of CPT were revealed with HPLC anal. Noticeably, PRADG could effectively lower body weight loss as well as DAI scores, alleviate colon shortening, and reduce the levels of proinflammatory cytokines in mice with colitis. Further exploration found that increment of TJ proteins expression (ZO-1, occludin and claudin-1) and inhibition of IL-23/IL-17 axis-modulated inflammation were observed in PRADG-treated mice. Addnl., the diversity of gut microbiota and the relative abundance of beneficial bacteria were increased following PRADG treatment. PRADG could be sufficient to ameliorate colitis by regulating the intestinal phys. barrier, immune responses, and gut microbiota in mice. Our findings highlight that PRADG might be a prospective remedy for UC.

Journal of Ethnopharmacology published new progress about 16S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Steenkamp, Jacobus A.; Ferreira, Daneel; Roux, David G. published the artcile< Stereospecific functionalization of the heterocyxlic ring systems of flavan-3-ol and [4,8]-biflavan-3-ol derivatives with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ).>, COA of Formula: C19H34O2, the main research area is stereospecific methoxylation flavanol ether; functionalization stereospecific heterocyclic ring; biflavanol oxidation stereospecific; benzoquinone oxidation heterocyclic stereochemistry.

Efficient stereospecific 4-methoxylation of both 2,3-trans- and 2,3-cis-flavan-3-ol Me ethers with DDQ (I) in CHCl3-MeOH has synthetic and degradative significance in oligomeric flavanoid chem. Thus, (+)-catechin tetra-Me ether and its acetate (II; R = H, OAc) were oxidized by I in CHCl3-MeOH to the MeO derivative III (same R).

Tetrahedron Letters published new progress about Methoxylation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

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