Month: November 2022

Garcia-Garcia, Amalia; Oyarzabal, Itziar; Cepeda, Javier; Seco, Jose M.; Garcia-Valdivia, Antonio A.; Gomez-Ruiz, Santiago; Salinas-Castillo, Alfonso; Choquesillo-Lazarte, Duane; Rodriguez-Dieguez, Antonio published the artcile< Slow relaxation of magnetization and luminescence properties of a novel dysprosium and pyrene-1,3,6,8-tetrasulfonate based MOF {[Dy4(μ-pytet)(μ4-pytet)2(DMF)20(H2O)2]·4DMF·4H2O}n (1).>, Synthetic Route of 112-63-0, the main research area is dysprosium pyrenetetrasulfonate MOF preparation crystal structure magnetic relaxation luminescence.

The authors report the formation of a novel multifunctional metal-organic framework (MOF) based on Dy(III) ions using pyrene-1,3,6,8-tetrasulfonate (pytet)4- as a ligand, synthesized using a soft hydrothermal route. This material shows a two-dimensional network with small channels along a crystallog. axis and displays intense photoluminescence properties in the solid state at room temperature due to the pyrene derivative ligand. The magnetic properties of this 2-dimensional-MOF are also accomplished, confirming slightly frequency-dependent out of phase signals under an applied field of 1000 Oe.

New Journal of Chemistry published new progress about Color. 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

Zhang, Zhenhua; Gorski, Bartosz; Leonori, Daniele published the artcile< Merging Halogen-Atom Transfer (XAT) and Copper Catalysis for the Modular Suzuki-Miyaura-Type Cross-Coupling of Alkyl Iodides and Organoborons>, Quality Control of 112-63-0, the main research area is alkyl iodide aryl organoboron copper catalyst Suzuki Miyaura coupling; aryl alkane preparation.

A mechanistically distinct approach to achieve Suzuki-Miyaura-type cross-couplings between alkyl iodides and aryl organoborons was reported. This process required a copper catalyst but, in contrast with previous approaches based on palladium and nickel systems, does not utilizes the metal for the activation of the alkyl electrophile. Instead, this strategy exploited the halogen-atom transfer ability of α-aminoalkyl radicals to convert secondary alkyl iodides into the corresponding alkyl radicals that then were coupled with aryl, vinyl, alkynyl, benzyl and allyl boronate species. These novel coupling reactions feature simple set up and conditions (1 h at room temperature) and facilitate access to privileged motifs targeted by the pharmaceutical sector.

Journal of the American Chemical Society published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 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

O’Mahony, Rosella M.; Broderick, Caoimhe M.; Lynch, Denis; Collins, Stuart G.; Maguire, Anita R. published the artcile< Synthesis and use of a cost-effective, aqueous soluble diazo transfer reagent - m-carboxybenzenesulfonyl azide>, SDS of cas: 94-02-0, the main research area is synthesis use water soluble diazo transfer reagent carboxybenzenesulfonyl azide.

Herein, we report the preparation and use of m-carboxybenzenesulfonyl azide as a diazo transfer reagent. This compound is an inexpensive and potentially scalable alternative to many of the diazo transfer reagents currently available, most of which have hazards associated with their use. Its usefulness and suitability as a diazo transfer reagent was assessed on the basis of cost, safety and its effectiveness in diazo transfer to a variety of different substrates.

Tetrahedron Letters published new progress about Diazo transfer reaction. 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, SDS of cas: 94-02-0.

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

Rzhevskiy, Sergey A.; Topchiy, Maxim A.; Golenko, Yulia D.; Gribanov, Pavel S.; Sterligov, Grigorii K.; Kirilenko, Nikita Yu.; Ageshina, Alexandra A.; Bermeshev, Maxim V.; Nechaev, Mikhail S.; Asachenko, Andrey F. published the artcile< Undirected ortho-selectivity in C-H borylation of arenes catalyzed by NHC platinum(0) complexes>, Application of C19H34O2, the main research area is regioselective borylation arene platinum NHC complex catalyst.

Borylation of arenes with bis(pinacolato)diboron catalyzed by sterically encumbered NHC platinum complexes proceeds predominantly at ortho-position even in the absence of a directing group (o : m : p ratio up to 10: 3: 1). The similar borylation with pinacolborane would proceed less selectively.

Mendeleev Communications published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Castro, Gabriel Abranches Dias; Fernandes, Sergio Antonio published the artcile< Microwave-assisted green synthesis of levulinate esters as biofuel precursors using calix[4]arene as an organocatalyst under solvent-free conditions>, Reference of 112-63-0, the main research area is levulinate ester sulfonic acid calixarene organocatalyst microwave green synthesis.

Levulinic acid, one of the top 12 value-added chems., can be obtained by the transformation of biomass by acid catalysis. Alkyl levulinate has been widely explored as a precursor for obtaining renewable fuel additives. In this work, the organocatalyst CX4SO3H was employed for the first time as an organocatalyst for levulinic acid esterification reactions. Various parameters, such as the temperature, reaction time, and catalyst load, were investigated. The optimized reaction conditions were a reaction temperature of 80°C (MWI), a reaction time of 2.5 min, a CX4SO3H catalyst load of 1 mol% and solvent-free conditions. Ten different alcs. were evaluated for the synthesis of alkyl levulinate with high yields (ca. 99%), with the exception of tert-Bu alc. (13% yield). The levulinic acid esterification reaction, a type of green chem. reaction, has many advantages such as (i) creation of a new C-O bonds, (ii) water being the sole waste, (iii) 100% carbon economy, (iv) metal- and solvent-free processes, (v) short time and (vi) nontoxic and reusable organocatalysts. These advantages, along with the simple workup procedure, make this efficient protocol a greener alternative to the traditional methods used for the synthesis of levulinate esters to generate biofuels.

Sustainable Energy & Fuels published new progress about Green chemistry. 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

Fuentes Pineda, Rosinda; Zems, Yaroslav; Troughton, Joel; Niazi, Muhammad R.; Perepichka, Dmitrii F.; Watson, Trystan; Robertson, Neil published the artcile< Star-shaped triarylamine-based hole-transport materials in perovskite solar cells>, Category: esters-buliding-blocks, the main research area is triarylamine hole transport material perovskite solar cell.

Two novel star-shaped triarylamine-based hole transport materials with triphenylamine (STR1), or a partially oxygen-bridged triphenylamine (STR0), as core and para-substituted triphenylamine side arms were synthesized, fully characterized and studied in perovskite solar cells. Their thermal, optical, electrochem. and charge transport properties were examined and compared in the context of their mol. structure. Due to its more planar configuration, STR0 showed a red-shifted absorption in comparison with STR1. STR0 also forms a more stable amorphous glassy state and showed higher glass transition temperature than STR1 and spiro-OMeTAD. These HTMs were tested in perovskite solar cells using a device configuration of FTO/bl-TiO2/mp-TiO2/CH3NH3PbI3/HTM/Au showing a power conversion efficiency of 13.3% for STR0 and 11.5% for STR1. The STR0-based devices showed higher fill factor and better reproducibility than spiro-OMeTAD-based cells. Without dopant additives, solar cells based on STR0 exhibited a good photocurrent d. of 16.63 mA cm-2 and the efficiency improved from a starting PCE of 3.9% to 6.6% after two weeks of storage.

Sustainable Energy & Fuels published new progress about Band gap Role: PRP (Properties), TEM (Technical or Engineered Material Use), USES (Uses). 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

Yuan, Dan; Liu, Meijing; Jia, Peng; Li, Yiping; Huang, Yuling; Ye, Li; Api, Laze; Chen, Maogang; Yao, Liang; Wang, Zixin; Liu, Honglu; Liang, Shu; Yang, Shujuan published the artcile< Prevalence and determinants of virological failure, genetic diversity and drug resistance among people living with HIV in a minority area in China: a population-based study>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is HIV virol failure genetic diversity drug resistance China; Antiretroviral therapy; Drug resistance; HIV; HIV-1 subtypes; Virological failure.

Liangshan Yi Autonomous Prefecture is one of the areas that most severely affected by human immunodeficiency virus (HIV) in China, and virol. failure on antiretroviral therapy (ART) is serious in this area. Anal. of prevalence and determinants of ART failure, the genetic diversity and drug resistance among people living with HIV (PLWH) helps improve HIV treatment efficiency and prevent HIV transmission. A total of 5157 PLWH were recruited from 2016 to 2017. The venous blood samples were subjected to RT-PCR, followed by sequencing of the HIV-1 pol gene, targeting the protease and reverse transcriptase fragments. HIV-1 diversity was analyzed using the DNAStar software and drug resistance mutations were analyzed using the Stanford University HIV Drug Resistance Database. A total of 2156 (41.81%) PLWH showed virol. failure on ART. Males (ORm = 1.25), heterosexual behaviors and drug injection (ORm = 1.44) and mother to child transmission routes (ORm = 1.58), the clin. stage of AIDS (ORm = 1.35), having used illicit drugs and shared the needles (1-4 times: ORm = 1.34; more than 5 times: ORm = 1.52), having ever replaced ART regimen (ORm = 1.48) increased the risk of virol. failure among PLWH, while higher education lever (ORm = 0.77) and ≥ 12 mo on ART (12 ∼ 36 mo: ORm = 0.72; ≥36 mo: ORm = 0.66) was associated with lower likelihood of virol. failure. The data revealed that CRF07_BC (1508, 95.62%) were the most common strains, and the drug-resistant rate was 32.10% among PLWH with virol. failure in this area. The high frequencies of drug resistance were found in EFV and NVP of NNRTIs, ABC, FTC and 3TC of NRTIs, and TPV/r in PIs. The most common mutations in NNRTIs, NRTIs and PIs were K103N/KN (64.69%), M184V/MV/I (36.29%) and Q58E/QE (4.93%), resp. We concluded that surveillance of virol. failure, HIV-1 subtypes, and drug resistance to understand HIV-1 epidemiol. and guide modification of ART guidelines, and target prevention and control strategies should be formatted to reduce the virol. failure and drug resistance to promote viral suppression and prevent HIV-1 transmission.

BMC Infectious Diseases published new progress about AIDS (disease). 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

Gagneux, A.; Grob, C. A. published the artcile< Bicyclo[2.2.2]octane series. III. Structure and solvolysis of bicyclo[2.2.2]octa-2,5-diene dibromides>, HPLC of Formula: 112-63-0, the main research area is .

Bromination of bicyclo[2.2.2]octa-2,5-diene (I) led to a mixture of trans- 3,5-dibromohomotricyclene (II) and trans- 2,3-dibromobicyclo[2.2.2]oct-5-ene (III) in the ratio of 3:7. The result was explained as the endo addition of Br to I. Hydrolysis of III yielded 8-bromobicyclo[3.2.1]oct-2-en-4-ol by ionization of the endo Br atom. The rate of solvolysis was 143 times that of cyclopentyl bromide. Similarly, II solvolyzed 384 times as fast as cyclopentyl bromide did. This suggested participation of the strained cyclopropane ring in the ionization step.

Helvetica Chimica Acta published new progress about Bromination. 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

Zhang, Weinan; Wang, Chen; Zhu, Wenfeng; Liu, Fan; Liu, Yake published the artcile< Ferrostatin-1 alleviates cytotoxicity of cobalt nanoparticles by inhibiting ferroptosis>, COA of Formula: C15H22N2O2, the main research area is ferroptosis fibroblast cell viability ferrostatin 1 cobalt nanoparticle cytotoxicity; Cobalt nanoparticles; Ferrostatin-1; ferroptosis; hip arthroplasty; lipid peroxidation.

Cobalt is the main component of metal prostheses in hip arthroplasty. Studies have shown that metal particles mainly composed of cobalt nanoparticles (CoNPs) can cause systemic and local toxic reactions due to various phys. and chem. factors. Therefore, elucidating the underlying mechanisms of metal prosthesis action, coupled with identification of effective detoxification drugs are imperative to minimizing postoperative complications and prolonging the service life of these clin. tools. In this study, we treated Balb/3T3 mouse fibroblast cell line with CoNPs and ferrostatin-1, then measured cell viability via the CCK-8 assay. Next, we determined levels of reactive oxygen species (ROS), malondialdehyde (MDA), glutathione (GSH), cobalt and iron contents, as well as glutathione peroxidase 4 (GPX4), and solute carrier family 7 member 11 (SLC7A11) expression in each group. Finally, we employed transmission electron microscopy (TEM) to detect changes in the ultrastructure of each group of cells. Exposure of cells to CoNPs significantly suppressed their viability, and downregulated expression of GSH, GPX4, and SLC7A11 proteins. Conversely, this treatment mediated a significant increase in ROS, MDA, cobalt, and iron levels in the cells. TEM images revealed a marked increase in d. of the mitochondrial membrane of cells in the CoNPs group, while the outer membrane was broken. Notably, treatment with ferroptosis inhibitor Ferrostatin-1 alleviated the cytotoxic response caused by CoNPs. These findings suggest that CoNP-induced cytotoxicity may be closely related to ferroptosis, indicating that inhibition of ferroptosis is a potential therapeutic strategy for reducing CoNP toxicity.

Bioengineered published new progress about Cell survival. 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, COA of Formula: C15H22N2O2.

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

Yang, Eryan; Wang, Lin; Jin, Weili; Liu, Xing; Wang, Qixue; Wu, Ye; Tan, Yanli; Wang, Yunfei; Cui, Xiaoteng; Zhao, Jixing; Tong, Fei; Hong, Biao; Xiao, Menglin; Liu, Xiaomin; Fang, Chuan; Kang, Chunsheng published the artcile< PTRF/Cavin-1 enhances chemo-resistance and promotes temozolomide efflux through extracellular vesicles in glioblastoma>, Reference of 112-63-0, the main research area is temozolomide glioblastoma chemoresistance extracellular vesicle PTRF cavin; Glioblastoma; PTRF; chloroquine; extracellular vesicles; temozolomide.

The concentration and duration of intracellular drugs have always been the key factors for determining the efficacy of the treatment. Efflux of chemotherapeutic drugs or anticancer agents is a major reason for multidrug resistance generation in cancer cells. The high expression of polymerase I and transcript release factor (PTRF) is correlated with a worse prognosis in glioma patients. However, the importance of PTRF on temozolomide (TMZ) resistance in glioblastoma (GBM) is poorly understood. TCGA data anal., CGGA data anal., transmission electron microscopy (TEM), SEM (SEM), clone formation, cell counting kit-8 (cck-8), western blot (WB), immunofluorescence (IF), immunohistochem. (IHC) and flow cytometry assays were performed to investigate the underlying mechanism and effect of PTRF on TMZ-resistance in a variety of GBM cell lines and GBM patient-derived xenograft (PDX) models. Clone formation, WB, IF, IHC and flow cytometry assays were performed to examine the efficacy of sequential therapy of TMZ followed by CQ in GBM cells and PDX models. The prognosis of GBM patients treated with TMZ was neg. correlated with PTRF expression. Our results reveal that PTRF knockdown significantly decrease proliferation and increase apoptosis in GBM after TMZ treatment. Moreover, PTRF contribute to TMZ-resistance by increasing TMZ efflux through extracellular vesicles (EVs). Furthermore, our results demonstrate that sequential therapy of TMZ followed by CQ significantly promotes the TMZ efficacy against GBM by increasing intracellular TMZ concentration ([TMZ]i). This study highlights that PTRF can act as an independent biomarker to predict the prognosis of GBM patients after TMZ treatment and describes a new mechanism contributing to TMZ-resistance. In addition, this study may provide a novel idea for GBM therapy.

Theranostics published new progress about Animal gene Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (Bax). 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