Tag: M.W=250-300

Fan, Yuqi; Cao, Xiunan; Zhang, Mengmeng; Wei, Shujie; Zhu, Yameng; Ouyang, Huizi; He, Jun published the artcile< Quantitative Comparison and Chemical Profile Analysis of Different Medicinal Parts of Perilla frutescens (L.) Britt. from Different Varieties and Harvest Periods>, Application In Synthesis of 112-63-0, the main research area is Perilla harvest period medicinal profile; GC-MS; Perilla frutescens (L.) Britt.; UPLC-MS/MS; UPLC-Q-TOF-MS/MS; chemical profile; multivariate analysis; plant metabolomics.

Perilla frutescens (L.) Britt. is a plant that has been classified as one of the “”One Root of Medicine and Food””, and it can be used both as medicine and as food. To explore the influence of different varieties and harvest periods on the quality of different medicinal parts of P. frutescens, a comprehensive study on the chem. constituents of P. frutescens based on plant metabolomics was conducted. A total of 57 nonvolatile chem. components and 105 volatile chem. components of P. frutescens were characterized by ultrahigh-performance liquid chromatog. coupled with quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS/MS) and gas chromatog.-mass spectrometry (GC-MS). Furthermore, 35, 27, and 2 nonvolatile constituents as well as 16, 16, and 18 volatile constituents were identified as potential markers for discriminating P. frutescens between different medicinal parts, different varieties, and different harvest periods, resp. Besides, 22 bioactive compounds of P. frutescens were quant. determined by a new sensitive UPLC-MS/MS method. This study comprehensively compares the differences and similarities of P. frutescens among the different medicinal parts, different varieties, and different harvest periods, and the results of this study may provide a theor. basis and guidance for studying the quality evaluation and the optimization of the harvest period of this plant.

Journal of Agricultural and Food Chemistry published new progress about Food analysis. 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

Devi, Jai; Kothari, Seema; Banerji, Kalyan K. published the artcile< Kinetics and mechanism of oxidation of some α-amino acids by pyridinium hydrobromide perbromide>, COA of Formula: C19H34O2, the main research area is kinetics mechanism oxidation amino acid; pyridinium hydrobromide perbromide oxidation.

Oxidation of nine α-amino acids by pyridinium hydrobromide perbromide (PHPB) in aqueous acetic acid leads to the formation of the corresponding aldehydes. The reaction is first order with respect to PHPB. Michaelis-Menten type kinetics are observed with respect to some of the amino acids while other amino acids exhibit a second order dependence. The oxidation of perdeuterioglycine showed the absence of a kinetic isotope effect. The effect of solvent composition indicates that the reaction rate increases with an increase in the polarity of the medium. Addition of pyridinium hydrobromide and bromide ion have no effect on the rate of oxidation The reaction is susceptible to both polar and steric effects of the substituents. It failed to induce polymerization of acrylonitrile. Suitable mechanisms have been proposed.

Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry published new progress about Amino acids Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), PROC (Process), RACT (Reactant or Reagent). 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

Amouzadeh Tabrizi, Mahmoud; Shamsipur, Mojtaba; Saber, Reza; Sarkar, Saeed; Zolfaghari, Najmeh published the artcile< An ultrasensitive sandwich-type electrochemical immunosensor for the determination of SKBR-3 breast cancer cell using rGO-TPA/FeHCFnano labeled Anti-HCT as a signal tag>, COA of Formula: C19H34O2, the main research area is breast cancer cell graphene oxide.

Here in, a high sensitive sandwich-type electrochem. immunosensor for the determination of SKBR-3 breast cancer cell has been fabricated using of green synthesized reduced graphene oxide as a platform to the immobilization of primary Herceptin antibody (Anti-HCT). The various reduced graphene oxide-tetrasodium 1, 3, 6, 8-pyrenetetrasulfonic acid/metal hexacyanoferrates (rGO-TPA/MHCFnano) nanocomposites included rGO-TPA/FeHCF, rGO-TPA/CoHCF, rGO-TPA/NiHCF and rGO-TPA/CuHCF were used as electrochem. labels of secondary Herceptine antibody. The obtained result showed that the sensitivity of proposed sandwich-type electrochem. immunosensor for the determination of SKBR-3 breast cancer cells (30,000 cells mL-1) using rGO-TPA/FeHCFnano labeled secondary Herceptine antibody was higher than the other rGO-TPA/MHCFnano-labeled secondary Herceptine antibodies. The differential pulse voltammetry (DPV) technique was used for the determination of SKBR-3 breast cancer cell in the concentration range of 500-30,000 cells mL-1 with the limit of detection of 21 cells mL-1. The proposed sandwich-type electrochem. immunosensor exhibited high selectivity, liner range responsibility and good stability.

Sensors and Actuators, B: Chemical published new progress about Biocompatibility. 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

Zurlinden, Todd J.; Saili, Katerine S.; Rush, Nathaniel; Kothiya, Parth; Judson, Richard S.; Houck, Keith A.; Hunter, E. Sidney; Baker, Nancy C.; Palmer, Jessica A.; Thomas, Russell S.; Knudsen, Thomas B. published the artcile< Profiling the ToxCast library with a pluripotent human (H9) stem cell line-based biomarker assay for developmental toxicity>, Reference of 112-63-0, the main research area is toxcast library pluripotent human stem cell line development toxicity; developmental toxicity; embryonic stem cells; predictive toxicology.

The Stemina devTOX quickPredict platform is a human pluripotent stem cell-based assay that predicts the developmental toxicity potential based on changes in cellular metabolism following chem. exposure. Using this assay, we screened 1065 ToxCast phase I and II chems. in single-concentration or concentration-response for the targeted biomarker (ratio of ornithine to cystine secreted or consumed from the media). The dataset from the Stemina (STM) assay is annotated in the ToxCast portfolio as STM. Major findings from the anal. of ToxCast_STM dataset include (1) 19% of 1065 chems. yielded a prediction of developmental toxicity, (2) assay performance reached 79%-82% accuracy with high specificity (> 84%) but modest sensitivity (< 67%) when compared with in vivo animal models of human prenatal developmental toxicity, (3) sensitivity improved as more stringent weights of evidence requirements were applied to the animal studies, and (4) statistical anal. of the most potent chem. hits on specific biochem. targets in ToxCast revealed pos. and neg. associations with the STM response, providing insights into the mechanistic underpinnings of the targeted endpoint and its biol. domain. The results of this study will be useful to improving our ability to predict in vivo developmental toxicants based on in vitro data and in silico models. Toxicological Sciences published new progress about Analysis (toxicol.). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

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

Lv, Min; Cai, Yuanzhen; Hou, Weikun; Peng, Kan; Xu, Ke; Lu, Chao; Yu, Wenxing; Zhang, Weisong; Liu, Lin published the artcile< The RNA-binding protein SND1 promotes the degradation of GPX4 by destabilizing the HSPA5 mRNA and suppressing HSPA5 expression, promoting ferroptosis in osteoarthritis chondrocytes>, HPLC of Formula: 347174-05-4, the main research area is ferroptosis osteoarthritis chondrocyte gene expression analysis; Chondrocyte; Ferroptosis; GPX4; HSPA5; Osteoarthritis; SND1.

Heat shock protein family A member 5 (HSPA5), a recently identified suppressor of ferroptosis, was reported to potentially regulating osteoarthritis. However, the exact role of HSPA5 and how its expression was regulated in osteoarthritis are largely unclear. Rat primary chondrocytes were treated with 10 ng/mL IL-1β for 24 h and incubated with ferrostatin-1 (a ferroptosis inhibitor). Cell viability, production of TNF-α, ROS and MDA, expression levels of collagen II, MMP13, GPX4, and SND1, and Fe2+ concentration were detected. Gain- and loss-of-function manipulations were performed to investigate the effect of HSPA5 on chondrocyte functions, and SND1 shRNA (sh-SND1) was transfected into IL-1β-treated primary chondrocytes alone or together with sh-HSPA5. Furthermore, the interaction between HSPA5 and GPX4 and the regulation of HSPA5 on GPX4 were explored. Finally, SND1 was knocked down in the rats with osteoarthritis, and the histopathol., expression of HSPA5-GPX4 axis, and levels of oxidative stress markers were evaluated. IL-1β treatment could enhance extracellular matrix (ECM) degradation (collagen II reduced and MMP13 increased), promote ferroptosis, manifested by decreased cell viability, increased levels of TNF-α, ROS, MDA, and Fe2+ concentrations, and decreased level of GPX4 protein, and increase SND1 expression in chondrocytes, which could be reversed by ferrostatin-1. Knockdown of SND1 enhanced ECM degradation and suppressed ferroptosis IL-1β-treated chondrocytes, which could be eliminated by knockdown of HSPA5. SND1 bound with HSPA5 at the 3’UTR and destabilized the HSPA5 mRNA. HSPA5 protein directly bound with GPX4 protein and pos. regulate its expression. HSPA5 overexpression suppressed IL-1β-induced chondrocyte ferroptosis, while this effect was counteracted by GPX4 silencing. Knockdown of SND1 upregulated HSPA5 and GPX4 in rat cartilage, inhibited inflammatory damage and ferroptosis, and alleviated OA progression. The RNA-binding protein SND1 promotes the degradation of GPX4 by destabilizing the HSPA5 mRNA and suppressing HSPA5 expression, promoting ferroptosis in osteoarthritis chondrocytes.

Inflammation Research published new progress about 3′-Untranslated region Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, HPLC of Formula: 347174-05-4.

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

Murai, Masahito; Nishinaka, Naoki; Takai, Kazuhiko published the artcile< Iridium-Catalyzed Sequential Silylation and Borylation of Heteroarenes Based on Regioselective C-H Bond Activation>, Product Details of C19H34O2, the main research area is iridium catalyzed sequential silylation borylation heteroarene quinoline derivative; boryl silyl quinoline heteroarene derivative preparation; quinoline iridium chloride complex preparation crystal structure; mol structure iridium quinoline chloride complex; C−H bond activation; borylation; heteroarenes; iridium; silylation.

An Ir-catalyzed regioselective sequential silylation and borylation of heteroarenes was developed, which represents a rare example of unsym. intermol. C-H bond difunctionalization through the introduction of two different functionalities during a 1-pot transformation. Although the substrate scope for the dehydrogenative silylation of heteroarenes was limited mainly to electron-rich five-membered rings, the current reaction proceeds with both electron-rich and electron-deficient heteroarenes with the aid of heteroatom-directing C-H bond activation. The regioselectivity of the 2nd borylation was controlled by both steric factors and the electronic effect of the silyl group installed in the 1st step. In combination with the classic cross-coupling reaction, this method provides rapid access to multisubstituted heteroarenes.

Angewandte Chemie, International Edition published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent) (heteroarenes). 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

Lee, Sun Bu; Park, Jin Hyun; Bae, Han Yong published the artcile< Hydrophobic Amplification Enabled High-Turnover Phosphazene Superbase Catalysis>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is beta arylated sulfido sulfonyl fluoride chemoselective preparation; organic synthesis; organocatalysis; phosphazenes; thia-Michael addition; water chemistry.

Herein a significant “”on-water”” hydrophobic amplification was achieved, enabling a high-turnover catalytic thia-Michael addition to produce unprecedented β-arylated-β-sulfido sulfonyl fluorides. Amounts as low as 100 ppm (0.01 mol %) of the phosphazene superbase were sufficient to successfully catalyzed the reaction with excellent chemo-/site-selectivity and with optimal functional group tolerance. Several β-arylated ethene sulfonyl fluorides were converted into thia-Michael adducts up to >99% yields. The mild conditions, high turnover, neutral pH, and scalability of the sustainable catalytic process benefit the preparation of potential pharmaceuticals (e.g., polyisoprenylated methylated protein Me esterase inhibitors) and organic materials (e. g., electrolyte additives).

ChemSusChem published new progress about Catalysis. 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

Ishita, Keisuke; Stefanopoulos, Stavros; Khalil, Ahmed; Cheng, Xiaolin; Tjarks, Werner; Rappleye, Chad A. published the artcile< Synthesis and biological evaluation of aminothiazoles against Histoplasma capsulatum and Cryptococcus neoformans>, Synthetic Route of 112-63-0, the main research area is aminothiazole preparation antifungal Histoplasma Cryptococcus; Aminothiazoles; Antifungal activity; Cryptococcus neoformans; Histoplasma capsulatum; Structure-activity-relationship.

The design and synthesis of a library of forty novel 2-aminoazole analogs as well as their evaluation as antifungal compounds against Histoplasma capsulatum and Cryptococcus neoformans is described. These structures were derived from N-[5-(1-naphthalenylmethyl)-2-thiazolyl]cyclohexanecarboxamide (41F5), a fungistatic agent previously identified through phenotypic screening (Antimicrob Agents Chemother. 2013;57:4349). Modifications to improve potency and water-solubility of 41F5 focused primarily on the 5-naphthalenyl group, the thiazole core, and the methylene linker between these two structural elements. In general, compounds with lipophilic [5+6] bicyclic ring systems, such as the 7-benzothiophenyl- and 4-indanyl groups, at the 5-position were 2-3 times more active against both fungal species as compared to 41F5. Also, introduction of a carbonyl group at the methylene linker of 41F5 resulted in a 2-3-fold increase in potency. These highly active compounds also showed generally low toxicities against murine P388D1 macrophages resulting in selectivity indexes ranging from 63 to >200. Compounds that were highly active against fluconazole-sensitive C. neoformans strains had almost identical activity against fluconazole-resistant variants of this fungus indicating that 14α-demethylase is not their mol. target. Highly active compounds also retained activity against H. capsulatum phagocytosed into P388D1 macrophages.

Bioorganic & Medicinal Chemistry published new progress about Cryptococcus neoformans. 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

Rumi, Mariacristina; Pond, Stephanie J. K.; Meyer-Friedrichsen, Timo; Zhang, Qing; Bishop, Maximilienne; Zhang, Yadong; Barlow, Stephen; Marder, Seth R.; Perry, Joseph W. published the artcile< Tetrastyrylarene Derivatives: Comparison of One- and Two-Photon Spectroscopic Properties with Distyrylarene Analogues>, Electric Literature of 112-63-0, the main research area is tetrastyrylarene derivative photon spectroscopic distyrylarene analog.

The 1-photon and two-photon absorption properties of cross-shaped chromophores consisting of four donor-substituted styryl branches linked to an aromatic core (benzene or pyrazine) were studied and compared with those of linear analogs with only two branches (donor-π-donor distryrylarenes). The areas of the lowest energy two-photon absorption bands of the compounds with four branches were less than twice those of analogs with two branches. The spectral features observed in these chromophores suggest that electronic coupling between the branches is effective but does not lead to significant enhancement of the two-photon cross section when the branches extend in more than one dimension. In a chromophore with two donor-substituted and two acceptor-substituted branches the two-photon cross section is smaller than in the corresponding linear analogs. The main characteristics of both the 1-photon and two-photon spectra of multibranched compounds discussed here can be explained qual. within the mol. exciton description. In contrast to the case of 1-photon absorptivities, the model shows that pure additivity of the two-photon absorption cross section should not be expected when two monomer units are coupled and that the cross section of the dimer depends on the relative orientation of the constituent units and on the strength and sign of the coupling interaction. In particular, the type of coupling effective in the four-branch chromophores presented here should result in a subadditivity of two-photon cross section of the monomers, in agreement with the exptl. findings.

Journal of Physical Chemistry C published new progress about Additivity (two-photon absorptivity sub-additivity and one-photon absorptivity). 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

Geenen, Sarah R.; Presser, Lysander; Hoelzel, Torsten; Ganter, Christian; Mueller, Thomas J. J. published the artcile< Electronic Finetuning of 8-Methoxy Psoralens by Palladium-Catalyzed Coupling: Acidochromicity and Solvatochromicity>, Product Details of C19H34O2, the main research area is methoxy psoralen diversity oriented preparation acidochromicity solvatochromicity; UV/Vis spectroscopy; acidochromism; cross-coupling reactions; density functional calculations; donor-acceptor dyes; solvatochromism.

Differently 5-substituted 8-methoxypsoralens can be synthesized by an efficient synthetic route with various cross-coupling methodologies, such as Suzuki, Sonogashira and Heck reaction. Compared to previously synthesized psoralens, thereby promising daylight absorbing compounds as potentially active agents against certain skin diseases can be readily accessed. Extensive investigations of all synthesized psoralen derivatives reveal fluorescence in the solid state as well as several distinctly emissive derivatives in solution Donor-substituted psoralens exhibit remarkable photophys. properties, such as high fluorescence quantum yields and pronounced emission solvatochromicity and acidochromicity, which were scrutinized by Lippert-Mataga and Stern-Volmer plots. The results indicate that the compounds exceed the limit of visible light, a significant factor for potential applications as an active agent. In addition, (TD)DFT calculations were performed to elucidate the underlying electronic structure and to assign exptl. obtained data.

Chemistry – A European Journal published new progress about Absorption spectra. 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