Category: esters-buliding-blocks

Larock, Richard C.; Yum, Eul K.; Doty, Mark J.; Sham, Kelvin K. C. published the artcile< Synthesis of Aromatic Heterocycles via Palladium-Catalyzed Annulation of Internal Alkynes>, Electric Literature of 112-63-0, the main research area is heteroannulation alkyne iodophenol iodobenzoate; benzofuran; benzopyran; isocoumarin; isoquinoline.

Pd catalyzes the heteroannulation of internal alkynes bearing tert-alkyl, aryl, or silyl groups by o-iodophenols, benzylic amides, benzylic alcs., and benzoates to afford good yields of the corresponding benzofurans, 1,2 -dihydroisoquinolines, benzopyrans, and isocoumarins.

Journal of Organic Chemistry published new progress about Alkynes Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Hsu, Jen-Yu; Sun, Hsin-Yun; Hsieh, Tan-Wen; Chang, Sui-Yuan; Chuang, Yu-Chung; Huang, Yu-Shan; Hsiao, Ching-Yu; Su, Yi-Ching; Liu, Wen-Chun; Chang, Shu-Fang; Hung, Chien-Ching published the artcile< Incidence of low-level viremia and its impact on virologic failure among people living with HIV-1 who switched to elvitegravir-based antiretroviral therapy>, Related Products of 112-63-0, the main research area is elvitegravir antiretroviral agent human immunodeficiency virus1 infection; Integrase strand transfer inhibitor; Plasma HIV RNA load; Resistance-associated mutation; Viral blip; Virologic response.

We aimed to investigate the incidence of low-level viremia (LLV) and its impact on virol. failure (VF) in people living with HIV (PLWH) on stable antiretroviral therapy (ART) who switched to co-formulated elvitegravir, cobicistat, emtricitabine and tenofovir alafenamide (EVG/c/FTC/TAF). PLWH aged 18 years or older who had received ART with plasma HIV RNA load (PVL) <50 copies/mL for 6 mo or longer and switched to EVG/c/FTC/TAF between March and Oct. 2018 were retrospectively included. The incidence of LLV (defined as PVL of 50-999 copies/mL) and VF (PVL ≥1000 copies/mL) was calculated and represented by Kaplan-Meier plots. The generalised estimating equation model was constructed to identify factors associated with LLV and VF. Resistance-associated mutations were determined using population sequencing. A total of 1078 PLWH were included. The incidence rates of LLV and VF after the switch to EVG/c/FTC/TAF were 3.5 and 0.8 events per 100 person-years of follow-up, resp., whereas the resp. cumulative incidence of LLV and VF reached 11.7% and 2.9% within 3 years of follow-up. LLV was associated with any LLV episode before or after the switch and prior exposure to integrase strand transfer inhibitor-based ART. VF was associated with any LLV before or after the switch and prior exposure to raltegravir, but not the level or frequency of LLV. The risks of LLV and VF were low in PLWH who had achieved virol. suppression and switched to EVG/c/FTC/TAF, and the presence of LLV and prior exposure to raltegravir increased the risk of VF. Journal of Global Antimicrobial Resistance published new progress about Antiviral agents. 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

Thomson, Jennifer E.; Campbell, Craig D.; Concellon, Carmen; Duguet, Nicolas; Rix, Kathryn; Slawin, Alexandra M. Z.; Smith, Andrew D. published the artcile< Probing the Efficiency of N-Heterocyclic Carbene Promoted O- to C-Carboxyl Transfer of Oxazolyl Carbonates>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is carbonate oxazolyl Steglich rearrangement carboxyl transfer azolium salt catalyst; oxazolone alkoxycarbonyl aryloxycarbonyl preparation.

Screening a range of azolium salts, bases and solvents for reactivity indicates that triazolinylidenes, generated in situ with KHMDS in THF, promote the Steglich rearrangement of oxazolyl carbonates I (R1 = 4-MeOC6H4; R2 = Me, Me2CH, Me2CHCH2, MeSCH2CH2, Ph, PhCH2; R3 = Me, Me2CH, Cl3CCMe2, Ph, PhCH2, PhCH2CHMe, Me2CHCHMe) to [alkoxy(or aryloxy)carbonyl]oxazolones II with high catalytic efficiency (typical reaction time 5 min at <1.5 mol % NHC). This protocol shows wide substrate applicability, even allowing the efficient generation of vicinal quaternary centers. An improved exptl. procedure is also described that allows a simplified one-pot reaction protocol to be employed with similarly high catalytic efficiency. Journal of Organic Chemistry published new progress about Carbenes (methylene derivatives) Role: CAT (Catalyst Use), SPN (Synthetic Preparation), USES (Uses), PREP (Preparation). 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

Luo, Jin; Bai, Rui; Liu, Yunxiao; Bi, Hong; Shi, Xiangzhen; Qu, Chongxiao published the artcile< Long non-coding RNA ATXN8OS promotes ferroptosis and inhibits the temozolomide-resistance of gliomas through the ADAR/GLS2 pathway>, Application of C19H34O2, the main research area is temozolomide long non coding RNA ferroptosis glioma; ADAR; ATXN8OS; Ferroptosis; Gliomas; TMZ-resistance.

As the most common malignant tumor, gliomas remain a poor prognosis while chemotherapy resistance is a medical problem for the treatment of glioma. Considering the correlation between drug resistance and ferroptosis, this study aims to explore the mechanism of chemotherapy resistance in glioma from the perspective of epigenetics. Because of the low expression of long non-coding RNA (lncRNA) ATXN8 opposite strand (ATXN8OS) in glioma cell lines, the role of ATXN8OS was explored by the detection on ferrous iron (Fe2+)/lipid reactive oxygen species (ROS), function experiments and assays performed with xenograft model, proving that ATXN8OS inhibited temozolomide (TMZ)-resistance of glioma. After subcellular fractionation and FISH assays revealed that ATXN8OS was mainly located in cytoplasm, we determined the RNA binding protein (RBP) of ATXN8OS as adenosine deaminase acting on RNA (ADAR) via RNA binding protein immunoprecipitation (RIP), RNA pull down and western blot assays. Furthermore, we verified that ATXN8OS stabilized glutaminase 2 (GLS2) mRNA by recruiting ADAR and GLS2 restrained TMZ-resistance of glioma both in vitro and in vivo. Rescue experiments indicated that ATXN8OS modulated TMZ-resistance of glioma through GLS2. In conclusion, ATXN8OS mediated ferroptosis and regulated the TMZ-resistance of glioma via ADAR/GLS2 pathway.

Brain Research Bulletin published new progress about Chemotherapy. 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

Sakai, Takaaki; Hirashima, Shin-ichi; Matsushima, Yasuyuki; Nakano, Tatsuki; Ishii, Daiki; Yamashita, Yoshifumi; Nakashima, Kosuke; Koseki, Yuji; Miura, Tsuyoshi published the artcile< Synthesis of Chiral γ,γ-Disubstituted γ-Butenolides via Direct Vinylogous Aldol Reaction of Substituted Furanone Derivatives with Aldehydes>, Related Products of 112-63-0, the main research area is hydroxymethyl butenolide regioselective diastereoselective enantioselective preparation; stereoselective vinylogous aldol addition butenolide aldehyde sulfonamide squaramide catalyst.

In the presence of a quinine-derived squaramide-sulfonamide, aldehydes RCHO (R = 4-ClC6H4, 3-ClC6H4, 2-ClC6H4, 4-BrC6H4, 4-F3CC6H4, Ph, 4-MeC6H4, 4-MeOC6H4, 1-naphthyl, 2-naphthyl, 2-furanyl, cyclohexyl, BuCH2) underwent regioselective, diastereoselective, and enantioselective vinylogous aldol addition reactions with γ-substituted β,γ-butenolides such as γ-angelica lactone to yield anti-(hydroxymethyl)butenolides such as I (R = 4-ClC6H4, 3-ClC6H4, 2-ClC6H4, 4-BrC6H4, 4-F3CC6H4, Ph, 4-MeC6H4, 4-MeOC6H4, 1-naphthyl, 2-naphthyl, 2-furanyl, cyclohexyl, BuCH2) in up to 95% ee.

Organic Letters published new progress about Addition reaction catalysts, stereoselective (vinylogous aldol, regioselective). 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

Zeiner, Pia S.; Filipski, Katharina; Filmann, Natalie; Forster, Marie-Therese; Voss, Martin; Fokas, Emmanouil; Herrlinger, Ulrich; Harter, Patrick N.; Steinbach, Joachim P.; Ronellenfitsch, Michael W. published the artcile< Sex-Dependent Analysis of Temozolomide-Induced Myelosuppression and Effects on Survival in a Large Real-life Cohort of Patients With Glioma>, Computed Properties of 112-63-0, the main research area is .

To investigate the association of radiochemotherapy-induced cytopenia with sex and its potential effect on survival in patients with glioma. We retrospectively analyzed cytopenia during temozolomide-based concomitant radiochemotherapy in 492 patients with glioma. Histol. grading, mol. pathol., surgical procedures, adjuvant chemotherapy subsequent to the radiochemotherapy phase, and overall survival (OS) were recorded. The extent of cytopenia was correlated with sex and outcome. Treatment-induced severe cytopenia (leukocytopenia, lymphocytopenia, neutropenia, and thrombocytopenia) was more frequent in women than men (44 vs 18%; p = 0.0002). In women with IDH-wt high-grade astrocytomas, there was a neg. correlation of severe cytopenia in general and thrombocytopenia in particular during temozolomide radiochemotherapy with OS independent from other predictors (92 [77-111] vs 73 [21-127] weeks; p <0.05). In men, there was also a trend for this unfavorable effect. In addition, severe cytopenia in all blood cell lineages correlated with reduced temozolomide dose exposure during radiochemotherapy (all p <0.05 in the total cohort) and reduced dose exposure was independently associated with worse OS (hazard ratios for OS in complete vs reduced temozolomide dose in the total and female cohort 0.66 [0.47-0.92] and 0.4 [0.24-0.69], p <0.05). Our anal. of treatment-induced cytopenia in a large cohort of patients with glioma confirms that women are at higher risk and demonstrates an association of cytopenia with shortened survival in women. This study provides Class II evidence that women with glioma treated with temozolomide-based concomitant radiochemotherapy have more frequent treatment-induced severe cytopenia than men and that severe myelosuppression correlates with worse OS in women. Neurology published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

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

Luciana del Valle, Rivero; Carmen, Maturano; Maria Jose, Rodriguez-Vaquero; Maria, Saguir Fabiana published the artcile< Utilization of Oenococcus oeni strains to ferment grape juice: Metabolic activities and beneficial health potential>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is utilization Oenococcus strain ferment grape juice; Antibacterial activity; Antioxidant capacity; Grape juice; Metabolism; Oenococcus oeni.

This study aimed to investigate the behavior of Oenococcus oeni MS9 and MS46 strains in sterile grape juice (SGJ, pH 4.0) incubated at 30°C, in terms of growth and glucose, organic acids and total phenolic compounds utilization. In addition, their antimicrobial activity and the changes in antioxidant properties of fermented juice with selected strain were evaluated. Both strains grew without lag period by ∼1.40 log CFU/mL at 12 days with maximum growth rates of about 0.019 h-1. After this time the MS9 and MS46 strains counts declined by 0.6 log units and remained unchanged resp. O. oeni MS46 was evaluated in SGJ for low inoculum size (∼104 CFU/mL). In this condition it also grew without lag period by 3.11 ± 0.01 log CFU/mL with a μmax of 0.05 h-1. Glucose and L-malic and citric acids were simultaneously utilized but at different rates and extents, yielding mainly lactic acid with concomitant pH reduction Acetic acid ranged between 11 and 19 mmol/L. Total phenolic compounds significantly decreased in fermented SGJ with strain MS9 but not MS46. In this last condition, the antioxidant activity increased by 21%. In addition, both O. oeni strains showed antibacterial properties against Escherichia coli 700, Salmonella Typhimurium and Listeria monocytogenes. O. oeni strains, especially MS46, with the ability to growth in SGJ, high malolactic potential and adequate sugars and organic acids profiles from the sensorial viewpoint may be used to ferment grape juice with safer and healthier properties than fresh juice.

Food Microbiology published new progress about Antimicrobial agents. 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

Canale, Vittorio; Rak, Aleksandra; Kotanska, Magdalena; Knutelska, Joanna; Siwek, Agata; Bednarski, Marek; Nowinski, Leszek; Zygmunt, Malgorzata; Koczurkiewicz, Paulina; Pekala, Elzbieta; Sapa, Jacek; Zajdel, Pawel published the artcile< Synthesis and pharmacological evaluation of novel silodosin-based arylsulfonamide derivatives as α1A/α1D-adrenergic receptor antagonist with potential uroselective profile>, SDS of cas: 112-63-0, the main research area is silodosin arylsulfonamide adrenergic receptor antagonist; arylsulfonamides of alicyclic amines; benign prostatic hyperplasia; silodosin; tamsulosin; uroselective activity; α1-adrenoceptor antagonists; α1A/B/D receptor selectivity.

Benign prostatic hyperplasia (BPH) is the most common male clin. problem impacting the quality of life of older men. Clin. studies have indicated that the inhibition of α1A-/α1D adrenoceptors might offer effective therapy in lower urinary tract symptoms. Herein, a limited series of arylsulfonamide derivatives of (aryloxy)ethyl alicyclic amines was designed, synthesized, and biol. evaluated as potent α1-adrenoceptor antagonists with uroselective profile. Among them, compound 9 (3-chloro-2-fluoro-N-([1-(2-(2-(2,2,2-trifluoroethoxy)phenoxy]ethyl)piperidin-4-yl)methyl)benzenesulfonamide) behaved as an α1A-/α1D-adrenoceptor antagonist (Ki(α1) = 50 nM, EC50(α1A) = 0.8 nM, EC50(α1D) = 1.1 nM), displayed selectivity over α2-adrenoceptors (Ki(α2) = 858 nM), and a 5-fold functional preference over the α1B subtype. Compound 9 showed adequate metabolic stability in rat-liver microsome assay similar to the reference drug tamsulosin (Clint = 67 and 41 μL/min/mg, resp.). Compound 9 did not decrease systolic and diastolic blood pressure in normotensive anesthetized rats in the dose of 2 mg/kg, i.v. These data support development of uroselective agents in the group of arylsulfonamides of alicyclic amines with potential efficacy in the treatment of lower urinary tract symptoms associated to benign prostatic hyperplasia.

Molecules published new progress about Benign prostatic hyperplasia. 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

Serbanovic, Ana; Branco, Luis C.; Nunes da Ponte, Manuel; Afonso, Carlos A. M. published the artcile< Osmium catalyzed asymmetric dihydroxylation of methyl trans-cinnamate in ionic liquids, followed by supercritical CO2 product recovery>, Related Products of 112-63-0, the main research area is osmium asym dihydroxylation cinnamate ionic liquid supercritical carbon dioxide; taxol side chain osmium dihydroxylation catalyst recycling.

In this work, osmium-catalyzed asym. dihydroxylation (AD) of Me trans-cinnamate was studied. Osmium and chiral ligand catalysts were immobilized in ionic liquid only, without any other reaction solvents, while the recovery of the product was performed by extraction with supercritical CO2, and compared with results obtained by extractions with organic solvents such as hexane and di-Et ether. In supercritical CO2 extraction experiments, optimal extraction pressure was found and ionic liquid chosen, so that the highest reaction yields coupled with lowest osmium content in the crude product can be achieved. Finally, recycle experiments of the same (ionic liquid + catalytic system) mixture were successfully conducted. Application of ionic liquids and supercritical CO2 in osmium catalyzed AD allows for the isolation of the diol basically without contamination with osmium, in high yield and enantiomeric excess, and it makes possible the efficient reuse of ionic liquid solvent and the catalytic system. The stereoselective dihydroxylation of trans-cinnamate gave (αR,βS)-α,β-di(hydroxy)benzenepropanoic acid Me ester.

Journal of Organometallic Chemistry published new progress about Dihydroxylation, stereoselective. 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

Nagumo, Ryo; Omori, Kohei; Muraki, Yukihiro; Iwata, Shuichi; Mori, Hideki; Yamada, Hidetaka published the artcile< Correlation between Macroscopic Diffusion Rates and Microscopic Interactions in Ethylene Glycol-Based Solvents>, Computed Properties of 112-63-0, the main research area is diffusion residence time ethylene glycol based solvent MD simulation.

An evaluation of mol. interactions is important for estimating macroscopic properties, such as solubility and diffusivity. In this study, for several types of ethylene glycol-based absorbents, we discuss the correlation between a macroscopic property (mol. diffusivity) and a microscopic criterion (residence time) using mol. dynamics simulations for pure solvent systems and CO2-loaded solvent systems. The neg. correlations between the diffusivity and the residence time can be divided into categories, depending on the number of constituent hydroxy groups of the solvent mols. The disparity between the categories arises from whether hydrogen bonding can be formed between the solvent mols. This study leads to the systematic estimation of the mol. diffusivity from the theor. prediction of the residence time. We believe that the residence time is suitable as a criterion to evaluate macroscopic properties.

Industrial & Engineering Chemistry Research published new progress about Absorbents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

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