Tag: M.W=250-300

Nishimine, Takayuki; Fukushi, Kazunobu; Shibata, Naoyuki; Taira, Hiromi; Tokunaga, Etsuko; Yamano, Akihito; Shiro, Motoo; Shibata, Norio published the artcile< Kinetic Resolution of Allyl Fluorides by Enantioselective Allylic Trifluoromethylation Based on Silicon-Assisted C-F Bond Cleavage>, SDS of cas: 112-63-0, the main research area is kinetic resolution allyl fluoride enantioselective allylic trifluoromethylation; allyl fluorides; fluorine; kinetic resolution; organocatalysis; trifluoromethylation.

Under optimized reaction conditions, the synthesis of the target compounds was achieved by a reaction of trimethyl(trifluoromethyl)silane with Morita-Baylis-Hillman-reaction products [β-fluoro-α-(methylene)benzenepropanoic acid ester derivatives] using (9S)-(9”S)-9,9”-[1,4-phthalazinediylbis(oxy)]bis[10,11-dihydro-6′-methoxycinchonan] [i.e., (DHQD)2PHAL] as catalyst. The products thus formed included (βS)-α-methylene-β-(trifluoromethyl)benzenepropanoic acid Me ester (I), (βR)-α-methylene-β-(trifluoromethyl)benzenepropanoic acid Me ester and (βR)-β-fluoro-α-(methylene)benzenepropanoic acid Me ester, (βS)-β-fluoro-α-(methylene)benzenepropanoic acid Me ester. The corresponding enantiomers were obtained using (9S,9”S)-9,9”-[(2,5-diphenyl-4,6-pyrimidinediyl)bis(oxy)]bis[10,11-dihydro-6′-methoxycinchonan] [(DHQD)2PYR] as catalyst.

Angewandte Chemie, International Edition published new progress about Allylic alkylation. 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

Lebedel, Ludivine; Arda, Ana; Martin, Amelie; Desire, Jerome; Mingot, Agnes; Aufiero, Marialuisa; Aiguabella Font, Nuria; Gilmour, Ryan; Jimenez-Barbero, Jesus; Bleriot, Yves; Thibaudeau, Sebastien published the artcile< Structural and Computational Analysis of 2-Halogeno-Glycosyl Cations in the Presence of a Superacid: An Expansive Platform>, Synthetic Route of 4098-06-0, the main research area is NMR DFT conformational analysis haloglycosyl cation superacid; conformation analysis; fluorine; glycosylation; reaction mechanisms; superacids.

An expansive NMR-based structural anal. of elusive glycosyl cations derived from natural and non-natural monosaccharides in superacids is disclosed. For the first time, it has been possible to explore the consequence of deoxygenation and halogen substitution at the C2 position in a series of 2-halogenoglucosyl, galactosyl, and mannosyl donors in the condensed phase. These cationic intermediates were characterized using low-temperature in situ NMR experiments supported by DFT calculations The 2-bromo derivatives display intramol. stabilization of the glycosyl cations. Introducing a strongly electron-withdrawing fluorine atom at C2 exerts considerable influence on the oxocarbenium ion reactivity. In a superacid, these oxocarbenium ions are quenched by weakly coordinating SbF6- anions, thereby demonstrating their highly electrophilic character and their propensity to interact with poor nucleophiles.

Angewandte Chemie, International Edition published new progress about Carbocations, carbenium (oxo). 4098-06-0 belongs to class esters-buliding-blocks, and the molecular formula is C12H16O7, Synthetic Route of 4098-06-0.

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

Yi, Dong; Wu, Yaping; Chen, Changyou; Wang, Li; Wang, Qin; Pu, Lin; Wei, Siping published the artcile< Preparation of pyrido[1,2-c][1,2,4]triazole-based π-conjugated triazene as a Fe3+ ion fluorescent sensor>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is arylsufonyltriazenylidene triazolo pyridine preparation ferric ion fluorescent sensor.

A highly efficient coupling reaction of N-heterocyclic carbene precursors with sulfonyl azides has been developed, affording a variety of pyrido[1,2-c][1,2,4]triazole-based π-conjugated triazenes e.g. I. The present reaction proceeds under very mild conditions with good functional group tolerance. The resulting triazenes exhibit selective and sensitive fluorescent response toward Fe3+ ion.

Chinese Chemical Letters published new progress about Azides, sulfonyl azides Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Zhou, Li; Huang, Xuming; Zhang, Yu; Wang, Jihui; Li, Haiyan; Huang, Haiwei published the artcile< PSMG3-AS1 enhances glioma resistance to temozolomide via stabilizing c-Myc in the nucleus.>, HPLC of Formula: 112-63-0, the main research area is PSMG3-AS1; c-Myc; chemotherapy resistance; long non-coding RNA (LncRNA); temozolomide.

Glioblastoma (GBM) is the main form of primary brain malignancies with a dismal prognosis partly due to its invasive growth and rapid relapse. GBM frequently developed resistance to current standard-of-care therapeutic modalities, including surgery, radiation and chemotherapy, of which temozolomide (TMZ) is the most widely used first-line anti-GBM drug. Despite the intense efforts of the past decades, the underlying mechanisms of GBM resistance to TMZ remain largely unclear. Here we show that the long noncoding RNA (lncRNA) PSMG3-AS1 is significantly upregulated in GBM and its expression correlates with the grade of glioma, with the highest level observed in GBM (Grade IV glioma). We also demonstrated that PSMG3-AS1 mediates the resistance of GBM to TMZ, as knockdown of PSMG3-AS1 remarkably increased the sensitivity whereas overexpression of PSMG3-AS1 in sensitive GBM cell line induced a resistance phenotype to TMZ. Mechanistically, PSMG3-AS1 directly binds to c-Myc and thus stabilizes c-Myc in the nucleus to promote the survival of GBM cells under treatment of TMZ. Our data demonstrated an unreported role of PSMG3-AS1 in TMZ resistance and provide a potential novel target to tackle TMZ resistance in GBM.

Brain and behavior published new progress about 112-63-0. 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

Murata, Ryuichi; Asano, Keisuke; Matsubara, Seijiro published the artcile< Catalytic asymmetric cycloetherification via intramolecular oxy-Michael addition of enols>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is dihydropyran preparation chemoselective enantioselective; enone bearing ketone organocatalyst asym cycloetherification oxy Michael addition.

In this study, the asym. cycloetherification of enols were presented, which were generated in situ from enone-bearing ketones, using chiral bifunctional organocatalysts bearing amino and squaramide groups. This transformation chemo- and enantioselectively afforded dihydropyran derivatives I [R1 = Ph, 4-BrC6H4, 2-naphthyl, etc.; R2 = CF3, CF2Br, CO2Et, Ph; R3 = H, C(O)Ph], which were the core structures of building blocks for synthesizing glycans.

Tetrahedron published new progress about Chemoselectivity. 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

Catalan, Javier; Perez, Pilar; Elguero, Jose published the artcile< Substituent effects on proton affinities: through bonds or through space mechanism?>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is MO pyrazole imidazole; protonation energy pyrazole imidazole; lone pair orbital energy heterocycle.

INDO calculations of the protonation energies and lone pair orbital energies of twenty pyrazoles and twenty imidazoles have been carried out in order to ascertain the mechanism of the substituent effect; Me, cyano, fluoro, amino, and nitro substituents have been examined The nitro group shows a special behavior. The importance of optimizing the geometry and the reasons for the anomaly shown by the nitro derivatives are discussed.

Heterocycles published new progress about Electronic state. 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

Han, Fengfeng; Jin, Qi; Xiao, Junpeng; Wu, Lili; Zhang, Xitian published the artcile< V2CTX catalyzes polysulfide conversion to enhance the redox kinetics of Li-S batteries>, Application of C19H34O2, the main research area is vanadium carbide polysulfide conversion redox kinetics lithium sulfur battery.

Lithium-sulfur (Li-S) batteries have the potential to become the future energy storage system, yet they are plagued by sluggish redox kinetics. Therefore, enhancing the redox kinetics of polysulfides is key for the development of high-energy d. and long-life Li-S batteries. Herein, a Ketjen Black (KB)/V2CTX modified separator (KB/V2CTX-PP) based on the catalytic effect in continuous solid-to-liquid-to-solid reactions is proposed to accelerate the conversion of sulfur species during the charge/discharge process in which the V2CTX can enhance the redox kinetics and inhibit polysulfide shuttling. The cells assembled with KB/V2CTX-PP achieve a gratifying first discharge capacity of 1236.1 mA h g-1 at 0.2C and the average capacity decay per cycle reaches 0.049% within 1000 cycles at 1C. The work provides an efficient idea to accelerate redox conversion and suppress shuttle effects by designing a multifunctional catalytic separator.

Dalton Transactions published new progress about Activation energy. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

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

Minatti, Ana; Zheng, Xiaolai; Buchwald, Stephen L. published the artcile< Synthesis of Chiral 3-Substituted Indanones via an Enantioselective Reductive-Heck Reaction>, Quality Control of 112-63-0, the main research area is indanone aryl asym synthesis; chalcone sulfonyloxy preparation stereoselective reductive Heck.

An efficient intramol. palladium-catalyzed, asym. reductive Heck reaction has been developed, which allowed for the synthesis of either enantiomerically enriched 3-substituted indanones I [X = H2; R1 = H, 6-MeO, 4-Me, 4-Me3Si, 5,6-(MeO)2, 6,7-benzo; R2 = Ph, 4-ClC6H4, 4-MeOC6H4, 3,4-Cl2C6H3, piperonyl, 2-furyl, ferrocenyl] or α-exo-methylene indanones I (X = CH2) from chalcones II (R3 = F3C, n-C4F9) depending on the base used.

Journal of Organic Chemistry published new progress about Alkyl aryl ketones Role: SPN (Synthetic Preparation), PREP (Preparation). 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

Kawashiri, Takehiro; Miyagi, Anna; Shimizu, Shiori; Shigematsu, Nao; Kobayashi, Daisuke; Shimazoe, Takao published the artcile< Dimethyl fumarate ameliorates chemotherapy agent-induced neurotoxicity in vitro>, Product Details of C19H34O2, the main research area is neurodegeneration dimethyl fumarate chemotherapy; Chemotherapy agents; Dimethyl fumarate; Neurotoxicity; Nuclear factor-erythroid-2-related factor 2 (Nrf2); Oxaliplatin.

Chemotherapy agents such as oxaliplatin, cisplatin, paclitaxel, and bortezomib frequently cause severe peripheral neuropathy and there is currently no effective strategy to prevent this. Di-Me fumarate (DMF) is a new oral drug for the treatment of multiple sclerosis, and has neuroprotective effects via up-regulation of the nuclear factor-erythroid-2-related factor 2 (Nrf2)-dependent antioxidant response. In this study, we investigated the effect of DMF on chemotherapy agent-induced neurodegenerations in cultured cells. We found that DMF and its metabolite monomethyl fumarate (MMF) attenuated oxaliplatin-, cisplatin-, and bortezomib- (but not paclitaxel-) induced inhibition of neurite outgrowth, but had no effect on cell death as a result of these agents in cultured PC12 cells and primary cultured rat dorsal root ganglion (DRG) neurons. Furthermore, Nrf2 DNA binding activity was increased by DMF and MMF in PC12 cells. These findings suggest that DMF, which activates Nrf2 pathway, has a potential protective action against chemotherapy-induced neurotoxicity, particularly neurite impairments.

Journal of Pharmacological Sciences (Amsterdam, Netherlands) published new progress about Atrophy. 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

Minaei, Soraya Emamgholizadeh; Khoei, Samideh; Khoee, Sepideh; Mahdavi, Seied Rabi published the artcile< Sensitization of glioblastoma cancer cells to radiotherapy and magnetic hyperthermia by targeted temozolomide-loaded magnetite tri-block copolymer nanoparticles as a nanotheranostic agent>, Quality Control of 112-63-0, the main research area is glioblastoma cancer radiotherapy magnetic hyperthermia nanotheranostics temozolomide; magnetite triblock copolymer nanoparticles; Combination treatment; Hyperthermia; Nanoparticle; Radio-sensitizer; Radiotherapy; Thermo-sensitizer.

Recently, the development of new strategies in the treatment and diagnosis of cancer cells such as thermo-radiation-sensitizer and theranostic agents have received a great deal of attention. In this work, folic acid-conjugated temozolomide-loaded SPION@PEG-PBA-PEG nanoparticles (TMZ-MNP-FA NPs) were proposed for use as magnetic resonance imaging (MRI) contrast agents and to enhance the cytotoxic effects of hyperthermia and radiotherapy. Nanoparticles were synthesized by the Nano-precipitation method and their characteristics were determined by dynamic light scattering (DLS), SEM (SEM) and X-ray powder diffraction (XRD). To evaluate the thermo-radio-sensitization effects of NPs, C6 cells were treated with nanoparticles for 24 h and then exposed to 6-MV X-ray radiation. After radiotherapy, the cells were subjected to an alternating magnetic field (AMF) hyperthermia. The therapeutic potential was assessed using clonogenic assay, ROS generation measurement, flow cytometry assay, and qRT-PCR anal. Also, the diagnostic properties of the nanoparticles were assessed by MRI. MRI scanning indicated that nanoparticles accumulated in C6 cells could be tracked by T2-weighted MR imaging. Colony formation assay proved that TMZ-MNP-FA NPs enhanced the anti-proliferation effects of AMF by 1.94-fold compared to AMF alone (P < 0.0001). Moreover, these NPs improved the radiation effects with a dose enhancement factor of 1.65. All results showed that the combination of carrier-based chemotherapy with hyperthermia and radiotherapy caused a higher anticancer efficacy than single- or two-modality treatments. The nanoparticles advanced in this study can be proposed as the promising theranostic and thermo-radio-sensitizer platform for the diagnosis and tri-modal synergistic cancer therapy. Life Sciences published new progress about Antiproliferative agents. 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