Tag: M.W=250-300

Becker, Peter; Duhamel, Thomas; Martinez, Claudio; Muniz, Kilian published the artcile< Designing Homogeneous Bromine Redox Catalysis for Selective Aliphatic C-H Bond Functionalization>, COA of Formula: C19H34O2, the main research area is sulfonamide bromine mCPBA light oxidation intramol amination catalyst; pyrrolidine sulfonyl preparation; oxaziridine sulfonyl preparation; C鈭扝 functionalization; Hofmann-L枚ffler reaction; amination; bromine; catalysis.

The potential of homogeneous oxidation catalysis employing bromine has remained largely unexplored. We herein show that the combination of a tetraalkylammonium bromide and meta-chloroperbenzoic acid offers a unique catalyst system for the convenient and selective oxidation of saturated C(sp3)-H bonds upon photochem. initiation with day light. This approach enables remote, intramol., position-selective C-H amination as demonstrated for 20 different examples. For the first time, an N-halogenated intermediate was isolated as the active catalyst state in a catalytic Hofmann-Loffler reaction. In addition, an expeditious one-pot synthesis of N-sulfonyl oxaziridines from N-sulfonamides was developed and exemplified for 15 transformations. These pioneering examples provide a change in paradigm for mol. catalysis with bromine.

Angewandte Chemie, International Edition published new progress about Amination (intramol.). 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

Zhang, Ingrid W.; Curto, Anna; Lopez-Vicario, Cristina; Casulleras, Mireia; Duran-Guell, Marta; Flores-Costa, Roger; Colsch, Benoit; Aguilar, Ferran; Aransay, Ana M.; Lozano, Juan Jose; Hernandez-Tejero, Maria; Toapanta, David; Fernandez, Javier; Arroyo, Vicente; Claria, Joan published the artcile< Mitochondrial dysfunction governs immunometabolism in leukocytes of patients with acute-on-chronic liver failure>, Category: esters-buliding-blocks, the main research area is gene expression mitochondrial dysfunction immunometabolism leukocyte acute liver failure; ACLF; RNA-seq; acute decompensated cirrhosis; immune cells; metabolic phenotype; mitochondria.

Patients with acute-on-chronic liver failure (ACLF) present a systemic hyperinflammatory response associated with increased circulating levels of small-mol. metabolites. To investigate whether these alterations reflect inadequate cell energy output, we assessed mitochondrial morphol. and central metabolic pathways with emphasis on the tricarboxylic acid (TCA) cycle in peripheral leukocytes from patients with acutely decompensated (AD) cirrhosis, with and without ACLF.The study included samples from patients with AD cirrhosis (108 without and 128 with ACLF) and 41 healthy individuals. Leukocyte mitochondrial ultrastructure was visualized by transmission electron microscopy and cytosolic and mitochondrial metabolic fluxes were determined by assessing NADH/FADH2 production from various substrates. Plasma GDF15 and FGF21 were determined by Luminex and acylcarnitines by LC-MS/MS. Gene expression was analyzed by RNA-sequencing and PCR-based glucose metabolism profiler array.Mitochondrial ultrastructure in patients with advanced cirrhosis was distinguished by cristae rarefication and swelling. The number of mitochondria per leukocyte was higher in patients, accompanied by a reduction in their size. Increased FGF21 and C6:0- and C8:0-carnitine predicted mortality whereas GDF15 strongly correlated with a gene set signature related to leukocyte activation. Metabolic flux analyses revealed increased energy production in mononuclear leukocytes from patients with preferential involvement of extra-mitochondrial pathways, supported by upregulated expression of genes encoding enzymes of the glycolytic and pentose phosphate pathways. In patients with ACLF, mitochondrial function anal. uncovered break-points in the TCA cycle at the isocitrate dehydrogenase and succinate dehydrogenase level, which were bridged by anaplerotic reactions involving glutaminolysis and nucleoside metabolismOur findings provide evidence at the cellular, organelle and biochem. levels that severe mitochondrial dysfunction governs immunometabolism in leukocytes from patients with AD cirrhosis and ACLF.Patients at advanced stages of liver disease have dismal prognosis due to vital organ failures and the lack of treatment options. In this study, we report that the functioning of mitochondria, which are known as the cell powerhouse, is severely impaired in leukocytes of these patients, probably as a consequence of intense inflammation. Mitochondrial dysfunction is therefore a hallmark of advanced liver disease.

Journal of Hepatology published new progress about Activating transcription factor 4 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

Zou, Yan; Wang, Yibin; Xu, Sen; Liu, Yanjie; Yin, Jinlong; Lovejoy, David B.; Zheng, Meng; Liang, Xing-Jie; Park, Jong Bae; Efremov, Yuri M.; Ulasovand, Ilya; Shi, Bingyang published the artcile< Brain Co-Delivery of Temozolomide and Cisplatin for Combinatorial Glioblastoma Chemotherapy>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is biomimetics; blood-brain barrier; brain delivery; combinational chemotherapy; glioblastoma.

Glioblastoma (GBM) is an intractable malignancy with high recurrence and mortality. Combinatorial therapy based on temozolomide (TMZ) and cisplatin (CDDP) shows promising potential for GBM therapy in clin. trials. However, significant challenges include limited blood-brain-barrier (BBB) penetration, poor targeting of GBM tissue/cells, and systemic side effects, which hinder its efficacy in GBM therapy. To surmount these challenges, new GBM-cell membrane camouflaged and pH-sensitive biomimetic nanoparticles (MNPs) inspired by the fact that cancer cells readily pass the BBB and localize with homologous cells, are developed. This study鈥瞫 results show that MNPs can efficiently co-load TMZ and CDDP, transport these across the BBB to specifically target GBM. Incorporation of pH-sensitive polymer then allows for controlled release of drug cargos at GBM sites for combination drug therapy. Mice bearing orthotopic U87MG or drug-resistant U251R GBM tumor and treated with MNPs@TMZ+CDDP show a potent anti-GBM effect, greatly extending the survival time relative to mice receiving single-drug loaded nanoparticles. No obvious side effects are apparent in histol. analyses or blood routine studies. Considering these results, the study鈥瞫 new nanoparticle formulation overcomes multiple challenges currently limiting the efficacy of combined TMZ and CDDP GBM drug therapy and appears to be a promising strategy for future GBM combinatorial chemotherapy.

Advanced Materials (Weinheim, Germany) published new progress about 112-63-0. 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

Datir, Rawlings P.; Kwaghe, Vivian; Roy, Sunando; Frampton, Dan; Breuer, Judith; Ogbanufe, Obinna; Murtala-Ibrahim, Fati; Charurat, Man; Dakum, Patrick; Sabin, Caroline A.; Ndembi, Nicaise; Gupta, Ravindra K. published the artcile< Deep sequencing of HIV-1 reveals extensive subtype variation and drug resistance after failure of first-line antiretroviral regimens in Nigeria>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is DNA sequencing HIV1 drug resistance antiretroviral population.

Deep sequencing could improve understanding of HIV treatment failure and viral population dynamics. However, this tool is often inaccessible in low- and middle-income countries. To determine the genetic patterns of resistance emerging in West African HIV-1 subtypes during first-line virol. failure, and the implications for future antiretroviral options. Patients and methods: Participants were selected from a Nigerian cohort of people living with HIV who had failed first-line ART and subsequently switched to second-line therapy. Whole HIV-1 genome sequences were generated from first-line virol. failure samples with Illumina MiSeq. Mutations detected at �% frequency were analyzed and compared by subtype. HIV-1 sequences were obtained from 101 participants (65% female, median age 30 years, median 32.9 mo of nevirapine- or efavirenz-based ART). Thymidine analog mutations (TAMs) were detected in 61%, other core NRTI mutations in 92% and NNRTI mutations in 99%. Minority variants (<20% frequency) comprised 18% of all mutations. K65R was more prevalent in CRF02AG than G subtypes (33% vs. 7%; P = 0.002), and � TAMs were more common in G than CRF02AG (52% vs. 24%; P = 0.004). Subtype G viruses also contained more RT cleavage site mutations. Cross-resistance to at least one of the newer NNRTIs, doravirine, etravirine or rilpivirine, was predicted in 81% of participants. Extensive drug resistance had accumulated in people with West African HIV-1 subtypes, prior to second-line ART. Deep sequencing significantly increased the detection of resistance-associated mutations. Caution should be used if considering newer-generation NNRTI agents in this setting. Journal of Antimicrobial Chemotherapy published new progress about Antiviral agents. 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

Ferreira, Aurelia R. O.; Silvestre-Albero, Joaquin; Maier, Martin E.; Ricardo, Nagila M. P. S.; Cavalcante, Celio L. Jr.; Luna, F. Murilo T. published the artcile< Sulfonated activated carbons as potential catalysts for biolubricant synthesis>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is sulfonated activated carbon potential catalyst biolubricant synthesis.

In this study, sulfonated activated carbons have been prepared, under different conditions, with the purpose of evaluating the effect of the nature and amount of sulfonic surface groups on the esterification reaction of free fatty acids (FFA) with different long-chain alcs. The synthesized catalysts were characterized using different techniques and 1H NMR was used for monitoring the reaction products. The modifications of the surface functionalities were assessed by XPS and Thermogravimetric anal. (TGA), while changes in the porous network and morphol. of the samples were evaluated before and after the treatment of the original activated carbon sample. XPS results showed the presence of two types of sulfur, one from thiophenic sulfur (present on all materials, including the unmodified sample), and the other from sulfonic groups (SO3H), at 168 eV (present only in the modified samples). These catalysts were applied in the esterification reaction and presented excellent catalytic performances, while the original activated carbon exhibited conversions similar to reactions without any catalyst. On the other hand, the conversion of fatty acids when using the modified carbons improves significantly with values up to �00% to mono alcs. and 70% to trimethylolpropane.

Molecular Catalysis published new progress about Esterification. 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

Xu, Pengfei; Westhoff, Mike-Andrew; Hadzalic, Amina; Debatin, Klaus-Michael; Winiarski, Lukasz; Oleksyszyn, Jozef; Wirtz, Christian Rainer; Knippschild, Uwe; Burster, Timo published the artcile< Diisothiocyanate-Derived Mercapturic Acids Are a Promising Partner for Combination Therapies in Glioblastoma>, Quality Control of 112-63-0, the main research area is glioblastoma diisothiocyanate mercapturate dinaciclib temozolomide combination therapy.

Glioblastoma represents the most aggressive tumor of the central nervous system. Due to invasion of glioblastoma stem cells into the healthy tissue, chemoresistance, and recurrence of the tumor, it is difficult to successfully treat glioblastoma patients, which is demonstrated by the low life expectancy of patients after standard therapy treatment. Recently, we found that diisothiocyanate-derived mercapturic acids, which are isothiocyanate derivatives from plants of the Cruciferae family, provoked a decrease in glioblastoma cell viability. These findings were extended by combining diisothiocyanate-derived mercapturic acids with dinaciclib (a small-mol. inhibitor of cyclin-dependent kinases with anti-proliferative capacity) or temozolomide (TMZ, standard chemotherapeutic agent) to test whether the components have a cytotoxic effect on glioblastoma cells when the dosage is low. Here, we demonstrate that the combination of diisothiocyanate-derived mercapturic acids with dinaciclib or TMZ had an additive or even synergistic effect in the restriction of cell growth dependent on the combination of the components and the glioblastoma cell source. This strategy could be applied to inhibit glioblastoma cell growth as a therapeutic interference of glioblastoma.

ACS Omega 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

Wang, Shuang; Viswanathan, Karthickeyan; Esakkimuthu, Sivakumar; Azad, Kalam published the artcile< Experimental investigation of high alcohol low viscous renewable fuel in DI diesel engine>, Computed Properties of 112-63-0, the main research area is alc viscosity renewable diesel engine fuel; Di-ethyl ether; Diesel engine; Engine characteristics; Ethanol; Orange oil methyl ester.

This study offered a comprehensive investigation on engine performance and emission characteristics of Kirloskar make tangentially vertical (TV1) model single-cylinder direct injection diesel engine fuelled with diesel as a benchmark fuel. Steam distilled orange oil was converted into orange oil Me ester (OME) by means of transesterification process. The phys. and chem. properties of fuels were measured and conformed to ASTM biodiesel standards and compared with diesel. Likewise, the chem. compositions of the prepared biodiesel were estimated by using GC-MS anal. OME comprises of 86.37% of (E)-3-propylidenecyclopentene (C8H12) in the maximum range. The presence of free fatty acids such as linoleic acid, palmitic acid and myristic acid in OME permits it to be the acceptable renewable resource for the production of biodiesel. Further, the work was progressed with the addition of oxygenated additives like ethanol and di-Et ether to OME to attain the improved fuel properties. Five and 10% volume of ethanol and di-Et ether were added to OME as oxygenated additives resp. OME10DEE showed higher performance characteristics than diesel and OME blends. Further, a significant reduction in HC, NOx and smoke emission was noticed with OME10DEE. The present work recommended the application of OME10DEE as an alternative fuel on account of its better engine performance and emission characteristics than other fuel blends.

Environmental Science and Pollution Research published new progress about Calophyllum inophyllum. 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

Knudsen, Andreas D.; Krebs-Demmer, Lisanne; Bjoerge, Natascha I. D.; Elming, Marie B.; Gelpi, Marco; Sigvardsen, Per E.; Lebech, Anne-Mette; Fuchs, Andreas; Kuhl, Joergen T.; Koeber, Lars; Lundgren, Jens; Nordestgaard, Boerge G.; Kofoed, Klaus F.; Nielsen, Susanne D. published the artcile< Pericardial adipose tissue volume is independently associated with human immunodeficiency virus status and prior use of stavudine, didanosine, or indinavir>, Related Products of 112-63-0, the main research area is didanosine stavudine antiviral agent adipose tissue immunodeficiency virus infection; HIV; cardiac computed tomography; comorbidity; obesity; pericardial fat.

Increased pericardial adipose tissue is associated with higher risk of cardiovascular disease. We aimed to determine whether human immunodeficiency virus (HIV) status was independently associated with larger pericardial adipose tissue volume and to explore possible HIV-specific risk factors. Persons with HIV (PWH) were recruited from the Copenhagen Comorbidity in HIV Infection (COCOMO) Study and matched 1:1 on age and sex to uninfected controls. Pericardial adipose tissue volume was measured using cardiac computed tomog. A total of 587 PWH and 587 controls were included. Median age was 52 years, and 88% were male. Human immunodeficiency virus status was independently associated with 17 mL (95% confidence interval [CI], 10-23; P <.001) larger pericardial adipose tissue volume Larger pericardial adipose tissue volume was associated with low CD4+ nadir and prior use of stavudine, didanosine, and indinavir. Among PWH without thymidine analog or didanosine exposure, time since initiating combination antiretroviral treatment (per 5-yr use) was associated with l6 mL (95% CI, -6 to -25; P = .002) lower pericardial adipose tissue volume Human immunodeficiency virus status was independently associated with larger pericardial adipose tissue volume Severe immunodeficiency, stavudine, didanosine, and indinavir were associated with larger pericardial adipose tissue volume Persons with HIV with prior exposure to these drugs may constitute a distinct cardiovascular risk population. Journal of Infectious Diseases published new progress about Adipose tissue (pericardial). 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

Mazzola, Maria Antonietta; Raheja, Radhika; Regev, Keren; Beynon, Vanessa; von Glehn, Felipe; Paul, Anu; Pierre, Isabelle; Kivisakk, Pia; Weiner, Howard L.; Gandhi, Roopali published the artcile< Monomethyl fumarate treatment impairs maturation of human myeloid dendritic cells and their ability to activate T cells>, Application In Synthesis of 112-63-0, the main research area is mono dimethyl fumarate human myeloid dendritic cell maturation; Multiple sclerosis; NF-kB; co-stimulatory molecules; dimethyl fumarate; monomethyl fumarate; myeloid dendritic cells.

Background:: Di-Me fumarate (DMF) and its active metabolite monomethyl fumarate (MMF) effectively lead to reduction in disease relapses and active magnetic resonance imaging (MRI) lesions. DMF and MMF are known to be effective in modulating T- and B-cell responses; however, their effect on the phenotype and function of human myeloid dendritic cells (mDCs) is not fully understood. Objective:: To investigate the role of MMF on human mDCs maturation and function. Methods:: mDCs from healthy controls were isolated and cultured in vitro with MMF. The effect of MMF on mDC gene expression was determined by polymerase chain reaction (PCR) array after in vitro MMF treatment. The ability of mDCs to activate T cells was assessed by in vitro co-culture system. mDCs from DMF-treated multiple sclerosis (MS) patients were analyzed by flow cytometry and PCR. Results:: MMF treatment induced a less mature phenotype of mDCs with reduced expression of major histocompatibility complex class II (MHC-II), co-stimulatory mols. CD86, CD40, CD83, and expression of nuclear factor 魏B (NF-魏B) subunits RELA and RELB. mDCs from DMF-treated MS patients also showed the same immature phenotype. T cells co-cultured with MMF-treated mDCs showed reduced proliferation with decreased production of interferon gamma (IFN-�, interleukin-17 (IL-17), and granulocyte-macrophage colony-stimulating factor (GM-CSF) compared to untreated cells. Conclusion:: We report that MMF can modulate immune response by affecting human mDC function.

Multiple Sclerosis Journal published new progress about B cell. 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

Zhang, Hongbo; Zhuo, Yuzhen; Li, Dihua; Zhang, Lanqiu; Gao, Qiaoying; Yang, Lei; Yuan, Xiangfei published the artcile< Dihydroartemisinin inhibits the growth of pancreatic cells by inducing ferroptosis and activating antitumor immunity>, SDS of cas: 347174-05-4, the main research area is dihydroartemisinin pancreas cell growth ferroptosis antitumor immunity; Dihydroartemisinin; Ferroptosis; M2; MDSCs; NK; NKT; Pancreatic cancer.

Dihydroartemisinin (DHA) exhibits a direct antitumor effect in various tumor models. However, the mechanism of DHA inducing ferroptosis and activating antitumor immunity remains obscure. Therefore, our study was dedicated to investigate the effect of DHA on ferroptosis and tumor microenvironment and elucidate the underlying mol. mechanism. PDAC orthotopic tumor model was used to investigate tumor proliferation and the population of immune cell in vivo, including M2-type macrophages (M2), myeloid-derived suppressor cells (MDSCs), CD4+T cells, CD8+T cells, NK cells and NKT cells. Levels of GPX4, SLC7A11, P53 and ALOX12 were determined by Real-time PCR and Western blot. CCK8 assay was performed to detect cell viability, and the ferroptosis was distinguished by flow cytometry. Our results showed that DHA inhibited pancreatic cancer cell proliferation. In addition, DHA induced cell ferroptosis by up-regulating the expression of P53 and ALOX12, which was blocked by baicalein (a selective ALOX12 inhibitor). However, DHA also up-regulated the expression of GPX4 and SLC7A11. On the other hand, DHA significantly decreased the suppressive expansion of M2 and MDSCs. Moreover, DHA increased the immune cell population of CD8+T cells, NK cells and NKT cells in the tumor tissues of the tumor-bearing mice. Whereas, the DHA treatment did not affect the frequencies of M2, MDSCs, CD4+T, CD8+T, NK and NKT cells in the spleen. Our research provided exptl. evidences on the activity and mechanism of ferroptosis induced by DHA and revealed that DHA regulated tumor local immunosuppressive microenvironment.

European Journal of Pharmacology published new progress about CD4-positive T cell. 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, SDS of cas: 347174-05-4.

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