Tag: M.W=250-300

Kowalczyk, Dorota; Albrecht, Lukasz published the artcile< Vinylogous Nucleophiles Bearing the Endocyclic Double Bond in the Allylic Alkylation with Morita-Baylis-Hillman Carbonates>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is coumarin methyl carbonate Morita Baylis Hillman chiral allylic alkylation; homoallylic coumarin stereoselective preparation.

This study demonstrates that vinylogous transfer of nucleophilicity in the allylic alkylation with Morita-Baylis-Hillman carbonates can be accomplished through the endocyclic double bond in 3-cyano-4-methylcoumarins. The developed reaction provides a straightforward access to functionalized coumarin derivativesI (EWG = CO2Me, CO2Et, CO2Bu-t, CN; R1 = Ph, 4-CF3C6H4, 4-BrC6H4, etc.; R2 = H, 6-Cl, 6-Br, etc.) of biol. and synthetic relevance. Target, highly functionalized products have been chemoselectively and efficiently obtained in very high yield (up to 98%) and with excellent enantioselectivity (up to 99.5:0.5 er).

Advanced Synthesis & Catalysis published new progress about Allylic alkylation catalysts, stereoselective. 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

Chai, Yinguang; Jia, Wenshan; Hu, Zhiqiu; Jin, Song; Jin, Hongchang; Ju, Huanxin; Yan, Xingbin; Ji, Hengxing; Wan, Li-Jun published the artcile< Monitoring the mechanical properties of the solid electrolyte interphase (SEI) using electrochemical quartz crystal microbalance with dissipation>, HPLC of Formula: 112-63-0, the main research area is copper quartz crystal microbalance electrochem solid electrolyte mech property.

Stable solid electrolyte interphase (SEI) has been well established to be critical for the reversible operation of Li (ion) batteries, yet our understanding of its mech. properties currently remains incomplete. Here, we used an electrochem. quartz crystal microbalance combined with dissipation monitoring (EQCM-D) to investigate SEI formation. By quant. estimating in-situ, the change in mass, shear modulus, and viscosity of the SEI, we show that the SEI formation in propylene carbonate (PC)- and ethylene carbonate/diethyl carbonate (EC/DEC)-based electrolytes involves the growth of a rigid layer followed by a viscoelastic layer, whereas a distinct “”one-layer”” rigid model is applicable to the SEI formulated in tetraethylene glycol di-Me ether (TEGDME)-based electrolyte. With the continuous formation of the SEI, its shear modulus decreases accompanied by an increase in viscosity. In TEGDME, the lightest/thinnest SEI (mass lower than in PC by a factor of nine) yet having the greatest stiffness (more than five times that in PC) is obtained. We attribute this behavior to differences in the chem. composition of the SEIs, which have been revealed by tracking the mass-change-per-mole-of-electron-transferred using EQCM-D and further confirmed by XPS.

Chinese Chemical Letters published new progress about Dielectric dissipation factor. 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

Baker, Sarah E.; Baker, Alexander A.; Orme, Christine A.; Worthington, Matthew A.; Li, Tian T.; Sedillo, Edwin M.; Dudoff, Jessica; Lee, Jonathan R. I.; Kuntz, Joshua D.; McCall, Scott K. published the artcile< Calcium vapor synthesis of extremely coercive SmCo5>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is samarium cobalt coercive calcium vapor synthesis.

Exceptionally coercive SmCo5 particles are produced through calcium vapor reduction of SmCo5O9 powders synthesized by flame spray pyrolysis. The resulting powders are composed of oblate hexagonal particles approx. 2 μ across with smooth surfaces. This microstructure yields record-breaking room temperature coercivity Hc,i >80 kOe, or >60 kOe when combined with advanced manufacturing approaches such as electrophoretic deposition or molding with tetraglyme inks. These techniques enable straightforward low-loss fabrication of bulk parts. The high coercivity is extremely robust at elevated temperatures, exceeding 10 kOe even at 600 °C. The oxide precursor approach removes the need for strict environmental control during synthesis that is common to other nanoparticle-based routes and can readily be scaled to kilogram quantities of feedstock production Magnet powders produced by calcium vapor reduction can thus function as the building blocks for traditional or advanced manufacturing techniques, while the high coercivity enables consistent performance across a wide range of temperatures

RSC Advances published new progress about Block construction materials. 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

Tabata, Toshikazu; Shibazaki, Toshio published the artcile< Fluorescent photometer using a low pressure mercury arc>, Formula: C19H34O2, the main research area is .

The construction of a simplified fluorescent photometer, easy to make and suitable as a portable meter, is described. A low pressure Hg lamp, 4 w., is used as the source of exciting light. The filtered fluorescent light is detected by a photomultiplier combined with an amplifier operated by dry cells.

Bunseki Kagaku published new progress about Fluorescence spectrometers. 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

Ma, Jun-An; Cahard, Dominique published the artcile< Screening of chiral catalysts for enantioselective electrophilic fluorination of β-keto esters. [Erratum to document cited in CA142:197594]>, COA of Formula: C19H34O2, the main research area is erratum stereoselective fluorination keto ester chiral ligand.

Line 36 should read: “”Sodeoka et al. described an efficient en antioselective fluorination of various acyclic and cyclic β-ketoesters catalysed by chiral BINAP-palladium complexes [9].””. The corrected version of Scheme 1 is also given.

Journal of Fluorine Chemistry published new progress about Chiral ligands Role: CAT (Catalyst Use), USES (Uses). 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

French, Frederic A.; DoAmaral, Jefferson R.; Blanz, Erwin J. Jr.; French, Douglas A. published the artcile< Antimalarial activity of guanylhydrazone salts of aromatic ketones. 2. Development of active polyhalo derivatives>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is antimalarial halobenzophenone guanyl hydrazones; Plasmodium benzophenones guanylhydrazones.

The requirement for the antimalarial activity of the halogen-substituent benzophenone guanylhydrazones Ph2C:NNHC(NH2:HCl) was the presence of a CF3 group in the 3 or 4 position or a F3CO group in the 4 position on one ring, and a halogen or CF3 in the 3 or 4 position of the 2nd ring. Twenty-five compounds containing halogen, CF3 or F3CO groups, substituted in various ring positions were synthesized by known methods and tested on mice infected with Plasmodium berghei. Fifteen compounds were active and 16 were partially curative. Twelve compounds produced 100% cures at one or more dose levels. 3,4-Dichloro-4′-trifluoromethylbenzophenone guanylhydrazone-HCl (I-HCl) was outstanding and yielded 100% cures with 80-640 mg/kg doses. Replacement of H by Me in the guanidine moiety abolished the antimalarial activity.

Journal of Medicinal Chemistry published new progress about Malaria. 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

Ebert, E.; Eckhardt, W.; Jaekel, K.; Moser, P.; Sozzi, D.; Vogel, C. published the artcile< Quantitative structure activity relationships of fungicidally active triazoles: analogs and stereoisomers of propiconazole and etaconazole>, Electric Literature of 112-63-0, the main research area is fungicide triazole derivative structure ergosterol; propiconazole stereoisomer fungicide sterol metabolism; ectaconazole stereoisomer fungicide sterol metabolism; QSAR triazole fungicide.

The preparation of the 4 stereoisomers of propiconazole (TILT) is described. Their inhibition of the 14α-C-demethylation of the sterol nucleus is examined and compared with the inhibition by the four stereoisomers of etaconazole (SONAX). The quant. structure-activity relationships (QSAR) of substituted 1,3-dioxolane-2-yl-methyltriazoles and 1,3-dioxane-2-yl-methyltriazoles on in vivo fungicidal activity are investigated.

Zeitschrift fuer Naturforschung, C: Journal of Biosciences published new progress about Agrochemical fungicides. 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

Luo, Jie; Fishburn, James; Hahn, Steven; Ranish, Jeffrey published the artcile< An integrated chemical cross-linking and mass spectrometry approach to study protein complex architecture and function>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is protein interaction structure BDRG chem cross linking mass spectrometry.

Knowledge of protein structures and protein-protein interactions is essential for understanding biol. processes. Chem. crosslinking combined with mass spectrometry is an attractive approach for studying protein-protein interactions and protein structure, but to date its use has been limited largely by low yields of informative cross-links (because of inefficient crosslinking reactions) and by the difficulty of confidently identifying the sequences of cross-linked peptide pairs from their fragmentation spectra. Here we present an approach based on a new MS labile crosslinking reagent, BDRG (biotin-aspartate-Rink-glycine), which addresses these issues. BDRG incorporates a biotin handle (for enrichment of cross-linked peptides prior to MS anal.), two pentafluorophenyl ester groups that react with peptide amines, and a labile Rink-based bond between the pentafluorophenyl groups that allows cross-linked peptides to be separated during MS and confidently identified by database searching of their fragmentation spectra. We developed a protocol for the identification of BDRG cross-linked peptides derived from purified or partially purified protein complexes, including software to aid in the identification of different classes of cross-linker-modified peptides. Importantly, our approach permits the use of high accuracy precursor mass measurements to verify the database search results. We demonstrate the utility of the approach by applying it to purified yeast TFIIE, a heterodimeric transcription factor complex, and to a single-step affinity-purified preparation of the 12-subunit RNA polymerase II complex. The results show that the method is effective at identifying cross-linked peptides derived from purified and partially purified protein complexes and provides complementary information to that from other structural approaches. As such, it is an attractive approach to study the topol. of protein complexes.

Molecular and Cellular Proteomics published new progress about Cellular retinol-binding protein 3 Role: BSU (Biological Study, Unclassified), PEP (Physical, Engineering or Chemical Process), BIOL (Biological Study), PROC (Process). 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

Im, Eun-Ju; Lee, Chan-Hyeong; Moon, Pyong-Gon; Rangaswamy, Gunassekaran Gowri; Lee, Byungheon; Lee, Jae Man; Lee, Jae-Chul; Jee, Jun-Goo; Bae, Jong-Sup; Kwon, Taeg-Kyu; Kang, Keon-Wook; Jeong, Myeong-Seon; Lee, Joo-Eun; Jung, Hyun-Suk; Ro, Hyun-Joo; Jun, Sangmi; Kang, Wonku; Seo, Seung-Yong; Cho, Young-Eun; Song, Byoung-Joon; Baek, Moon-Chang published the artcile< Sulfisoxazole inhibits the secretion of small extracellular vesicles by targeting the endothelin receptor A>, Category: esters-buliding-blocks, the main research area is sulfisoxazole anticancer agent breast cancer metastasis.

Inhibitors of the secretion of cancer exosomes, which promote cancer progression and metastasis, may not only accelerate exosome biol. research but also offer therapeutic benefits for cancer patients. Here we identify sulfisoxazole (SFX) as an inhibitor of small extracellular vesicles (sEV) secretion from breast cancer cells through interference with endothelin receptor A (ETA). SFX, an FDA-approved oral antibiotic, showed significant anti-tumor and anti-metastatic effects in mouse models of breast cancer xenografts, the reduced expression of proteins involved in biogenesis and secretion of sEV, and triggered co-localization of multivesicular endosomes with lysosomes for degradation We demonstrate the important role of ETA, as target of SFX, by gain- and loss-of-function studies of the ETA protein, through a direct binding assay, and pharmacol. and genetic approaches. These findings may provide a foundation for sEV-targeted cancer therapies and the mechanistic studies on sEV biol.

Nature Communications published new progress about Animal gene, CCL2 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

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

Gue, Anne-Marie; Lattes, Armand; Laurent, Elisabeth; Mauzac, Monique; Mingotaud, Anne-Francoise published the artcile< Characterization of recognition sites for diethyl 4-nitrobenzylphosphonate, an organophosphate pesticide analogue>, SDS of cas: 112-63-0, the main research area is diethyl nitrobenzylphosphonate complexing fluoroalc aromatic acid recognition site.

In a first step towards developing chem. sensors using mol. imprinted materials, the complexing characteristics of di-Et 4-nitrobenzylphosphonate, an organophosphate pesticide analog, have been studied. Two mols. have been assessed as potential interacting moieties, specifically 1,1,1-trifluoro-2-(trifluoromethyl)pent-4-en-2-ol and 4-(3-butenyloxy)benzoic acid. The interactions have been first characterized by regular methods, such as 1H, 31P NMR and IR spectroscopy. These showed a stoichiometry 1/1 for both complexes and association constants 40 ± 10 and 12 ± 2 M-1, resp. In a second step, isothermal titration calorimetry was used and a method was developed to obtain low-association constants The association constant for the fluoroalc. ligand was 63 ± 0.7 M-1. For the benzoic acid derivative, an appropriate model could not be found, preventing the evaluation of this constant

Analytica Chimica Acta published new progress about Sensors. 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