Tag: M.W=250-300

Sert, Murat published the artcile< Catalytic effect of acidic deep eutectic solvents for the conversion of levulinic acid to ethyl levulinate>, Product Details of C19H34O2, the main research area is levulinic acid esterification ethyl levulinate deep eutectic solvent catalyst.

The production of Et levulinate has been investigated by levulinic acid esterification with ethanol in the presence of deep eutectic solvents. Deep eutectic solvents are environmentally friendly materials that can be easily synthesized by mixing hydrogen bond donor and acceptor. In this study, six different choline chloride based deep eutectic solvents were synthesized. Due to the requirement of esterification reaction, carboxylic acids were selected as hydrogen bond donor to gain acidic nature. Reactions were carried out in a batch reactor at various operating conditions. The most catalytically active catalyst was found to be DES formed by choline chloride and para-toluene sulfonic acid. The maximum conversion of levulinic acid was achieved as 99.8% at 353 K for 1 h in the presence of 5 wt% of catalyst. The highest selectivity of Et levulinate was achieved as 99.9% at 353 K, catalyst loading of 5 wt% and ethanol/levulinic acid molar ratio of 1.

Renewable Energy published new progress about Deep eutectic solvents. 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

Wang, Yingcheng; Zhou, Xue; Shan, Wenyu; Liao, Ruisong; Deng, YuHua; Peng, Fangzhi; Shao, Zhihui published the artcile< Construction of Axially Chiral Indoles by Cycloaddition-Isomerization via Atroposelective Phosphoric Acid and Silver Sequential Catalysis>, Category: esters-buliding-blocks, the main research area is axially chiral indole preparation; alkynyl acetal naphthylamine phosphoric acid silver sequential cycloaddition isomerization.

Herein, the atroposelective organo/metal combined dual catalysis strategy for de novo construction of valuable axially chiral indole frameworks I [R = n-Bu, Ph, 2-naphthyl, etc.; R1 = H, 6-Br, 7-C6H5, etc.; R2 = i-Pr, t-Bu, cyclohexyl; R3 = Boc, Cbz] was developed. This protocol utilized a catalyst system of two chiral phosphoric acids (1 mol %) in combination with AgNO3 (1 mol %) and was based on the unreported intermol. cycloaddition-isomerization reaction of recently introduced C-alkynyl N,O-acetals and 2-naphthylamines. An important class of hitherto inaccessible axially chiral indoles with a C-N axis were obtained in good yields and enantioselectivities. The axially chiral indoles obtained also provided a platform for the catalyst-controlled atroposelective synthesis of axially chiral indoles bearing two C-N axes, which were difficult to access by the existing methods. This work was also an example of 2-naphthylamines used as 1,3-dinucleophiles and three-atom (CCN) synthons in cycloadditions

ACS Catalysis published new progress about Acetals Role: RCT (Reactant), RACT (Reactant or Reagent) (alkynyl). 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

Thio, Joanne P.; Liang, Christopher; Bajwa, Alisha K.; Wooten, Dustin W.; Christian, Bradley T.; Mukherjee, Jogeshwar published the artcile< Synthesis and evaluation of mefway analogs as ligands for serotonin 5HT1A receptors [Erratum to document cited in CA162:314486]>, Application In Synthesis of 112-63-0, the main research area is erratum mefway analog preparation serotonin 5HT1A receptor ligand.

On page 1483, Figure 1 incorrectly showed a cyclohexyl ketone instead of cyclohexyl ester in structures 11, 12, and 13; the corrected figure is given.

Medicinal Chemistry Research published new progress about 5-HT1A receptors Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Petri, Laszlo; Egyed, Attila; Bajusz, David; Imre, Timea; Hetenyi, Anasztazia; Martinek, Tamas; Abranyi-Balogh, Peter; Keseru, Gyorgy M. published the artcile< An electrophilic warhead library for mapping the reactivity and accessibility of tractable cysteines in protein kinases>, Application of C19H34O2, the main research area is protein kinase inhibitor drug discovery; JAK3; Kinase cysteome profiling; MELK; Small-molecule kinase inhibitors; Targeted covalent inhibitors; Warhead selection.

Targeted covalent inhibitors represent a viable strategy to block protein kinases involved in different disease pathologies. Although a number of computational protocols have been published for identifying druggable cysteines, exptl. approaches are limited for mapping the reactivity and accessibility of these residues. Here, we present a ligand based approach using a toolbox of fragment-sized mols. with identical scaffold but equipped with diverse covalent warheads. Our library represents a unique opportunity for the efficient integration of warhead-optimization and target-validation into the covalent drug development process. Screening this probe kit against multiple kinases could exptl. characterize the accessibility and reactivity of the targeted cysteines and helped to identify suitable warheads for designed covalent inhibitors. The usefulness of this approach has been confirmed retrospectively on Janus kinase 3 (JAK3). Furthermore, representing a prospective validation, we identified Maternal embryonic leucine zipper kinase (MELK), as a tractable covalent target. Covalently labeling and biochem. inhibition of MELK would suggest an alternative covalent strategy for MELK inhibitor programs.

European Journal of Medicinal Chemistry published new progress about Drug discovery. 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

Hay, Duncan A.; Rogers, Catherine M.; Fedorov, Oleg; Tallant, Cynthia; Martin, Sarah; Monteiro, Octovia P.; Muller, Susanne; Knapp, Stefan; Schofield, Christopher J.; Brennan, Paul E. published the artcile< Design and synthesis of potent and selective inhibitors of BRD7 and BRD9 bromodomains>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is BRD7 BRD9 inhibitor anticancer agent drug design cancer.

Emerging evidence suggests bromodomain-containing proteins 7 and 9 (BRD7 and BRD9) have roles in the regulation of human transcription and disease including cancer. We describe potent and selective inhibitors of the BRD7 and BRD9 bromodomains intended for use as tools to elucidate the biol. roles of BRD7 and BRD9 in healthy and diseased cells.

MedChemComm published new progress about Antitumor 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

Coogan, Michael P.; Harger, Martin J. P. published the artcile< Nucleophilic substitution in benzylic thiophosphinyl and thiophosphonyl chlorides: the contribution of elimination-addition pathways with methylenethioxophosphorane (thiophosphene) intermediates>, Category: esters-buliding-blocks, the main research area is thiophosphinyl thiophosphonyl chloride benzylic nucleophilic substitution; methylenethioxophosphorane intermediate elimination addition pathway; thiophosphene intermediate elimination addition pathway.

For the reactions of ArCH2P(S)(Ph)Cl and ArCH2P(S)(NMe2)Cl with Et2NH, changing ArCH2 from benzyl to 4-nitrobenzyl increases the rates of substitution by factors of 80 and >103, resp., and reduces markedly the ability to discriminate between competing Et2NH and Me2NH nucleophiles. With Et2ND, the nitrobenzyl substrates give products that contain D in the benzylic methylene group. These observations point to substitution by elimination-addition, with a 3-coordinate methylenethioxophosphorane (thiophosphene) intermediate, for the nitrobenzyl compounds

Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) published new progress about Elimination reaction. 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

Muramoto, Yokichi; Fujita, Masaki; Ichimoto, Itsuo; Ueda, Hiroo published the artcile< Ethyl 3-oxoglutarate derivatives. III. Synthesis of long chain oxodicarboxylic esters from ethyl 3-oxoglutarate>, Computed Properties of 112-63-0, the main research area is glutarate oxo alkylation haloester; alkylation oxoglutarate haloester; oxoalkanedioate dialkyl; carboxylic diester aliphatic oxo.

The monoanion of the Mg chelate prepared from Et 3-oxoglutarate (I) and Mg(OEt)2 was alkylated with a haloester to give a monoalkylated derivative A second alkylation with a different haloester in the presence of NaOEt followed by decarboxylative hydrolysis and esterification gave an unsymmetrical long chain oxodicarboxylic ester, such as di-Et 5-oxoheptadecanedioate, di-Me 6-methyl-8-oxopentadecanedioate di-Et 6-methyl-4-oxopentadecanedioate, or di-Et 2-methyl-4-oxopentadecanedioate. Moreover, di-Et 8-oxopentadecanedioate was obtained by the alkylation of I with Et 6-bromohexanoate in the presence of NaOEt alone as a catalyst. These esters appear suitable for cyclization to macrocyclic ketones.

Agricultural and Biological Chemistry published new progress about Esters. 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

Gevorgyan, Ashot; Mkrtchyan, Satenik; Grigoryan, Tatevik; Iaroshenko, Viktor O. published the artcile< Application of Silicon-Initiated Water Splitting for the Reduction of Organic Substrates>, Application of C19H34O2, the main research area is nitro compound amine oxide sulfoxide alkene alkyne reduction; aryl halide hydrodehalogenation silicon initiated water splitting; catalysis; silicon; substrate scope; transfer hydrogenation; water splitting.

The use of water as a donor for hydrogen suitable for the reduction of several important classes of organic compounds is described. It is found that the reductive water splitting can be promoted by several metalloids among which silicon shows the best efficiency. The developed methodologies were applied for the reduction of nitro compounds, N-oxides, sulfoxides, alkenes, alkynes, hydrodehalogenation as well as for the gram-scale synthesis of several substrates of industrial importance.

ChemPlusChem published new progress about Alkenes 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

Zhang, Ge; Tao, Xiang; Ji, Baowei; Gong, Jie published the artcile< Hypoxia-Driven M2-Polarized Macrophages Facilitate Cancer Aggressiveness and Temozolomide Resistance in Glioblastoma.>, Category: esters-buliding-blocks, the main research area is .

Hypoxia-induced M2 phenotypes of tumor associated macrophages (TAMs) promote the development and chemoresistance of multiple types of cancers, including glioblastoma (GBM). However, the detailed molecular mechanisms have not been fully understood. In this study, we firstly reported that hypoxic pressure promoted M2 macrophage generation, which further promoted cancer progression and temozolomide (TMZ) resistance in GBM through secreting vascular endothelial growth factor (VEGF). Specifically, the clinical data suggested that M2 macrophages were significantly enriched in GBM tissues compared with the adjacent normal tissues, and the following in vitro experiments validated that hypoxic pressure promoted M2-polarized macrophages through upregulating hypoxia-inducible factor-1α (HIF-1α). In addition, hypoxic M2 macrophages VEGF-dependently promoted cell proliferation, epithelial-mesenchymal transition (EMT), glioblastoma stem cell (GSC) properties, and TMZ resistance in GBM cells through activating the PI3K/Akt/Nrf2 pathway. Also, M2 macrophages secreted VEGF to accelerate angiogenesis in human umbilical vein endothelial cells (HUVECs) through interacting with its receptor VEGFR. In general, we concluded that hypoxic M2 macrophages contributed to cancer progression, stemness, drug resistance, and angiogenesis in GBM through secreting VEGF, and our data supported the notion that targeting hypoxia-associated M2 macrophages might be an effective treatment strategy for GBM in clinical practices.

Oxidative medicine and cellular longevity published new progress about 112-63-0. 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

Wang, Guiqiao; Liu, Xiaowei; Cai, Shaokang; Zhang, Shurong; Cui, Jinzhi; Gao, Canzhu; Cheng, Zhongfa published the artcile< A Pyrene Fluorescent Probe for Rapid Detection of Ferric Ions>, Application In Synthesis of 112-63-0, the main research area is ferric ion pyrene fluorescent probe detection; Ferric ions; Fluorescence quenching; Fluorescent material; PTSA.

The 1,3,6,8-pyrenetetrasulfonic acid tetrasodium salt (PTSA) is a pyrene derivative with high fluorescence characteristics and is widely used in fluorescence tracer. This study aims at investigating a simple and fast fluorescence detection method for determining the concentration of ferric ion by using PTSA, which the principle is that the fluorescence quenching of PTSA by ferric ions. Theor. and exptl. methods were adopted to deeply analyze its detection performance and characteristics. The fluorescence quenching phenomena under different pH conditions and the effect of the different interfering metal ions on PTSA/Fe3+ system was studied. The results showed that the PTSA was quite promising for the fluorescence detection of trace ferric ions, and the limit of detection is 9μg/L. This study is envisioned to provide inspirational insights on trace detection of iron ions, opening new routes for water monitoring use fluorescence properties.

Journal of Fluorescence published new progress about Fluorescence. 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