Category: 112-63-0

Tee, Oswald S.; Paventi, Martino published the artcile< Kinetics and mechanism of the bromination of 4-pyridone and related derivatives in aqueous solution>, HPLC of Formula: 112-63-0, the main research area is bromination kinetics mechanism pyridone; tautomerism substituent effect pyridone.

The kinetics of bromination of aqueous 4-pyridone (I) and selected derivatives are determined at 25éŽ?at pH 0.9. The tautomeric system 4-pyridone é–?4-hydroxypyridine reacts with Br2 via the predominant (pyridone) tautomer at pH <6 and via the conjugate anion at pH >6. 3-Bromo-4-pyridone behaves similarly. The kinetics also reveal that the facile dibromination of I occurs because at most pH’s the monobromo derivative is actually more reactive towards Br2 by virtue of its lower pKa. From the point of view of reactivity the 4-pyridones and their anions behave as substituted phenoxide ions. 4-Methoxypyridine does not undergo bromination under comparable conditions, but rather forms a complex with Br2. Tautomerism in phenol brominations are discussed.

Canadian Journal of Chemistry 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

Jumaah, Majd Ahmed; Salih, Nadia; Salimon, Jumat published the artcile< Optimization for esterification of saturated palm fatty acid distillate by D-optimal design response surface methodology for biolubricant production>, Reference of 112-63-0, the main research area is palm fatty acid distillate optimal design response surface methodol.

This work presents a synthesis of palm fatty acid distillate (PFAD)-based esters to produce biolubricant oils through the esterification reaction between saturated palm fatty acid distillate (SFA-PFAD) with different types of high degree polyhydric alcs. such as trimethylolpropane (TMP), di-trimethylolpropane (Di-TMP), pentaerythritol (PE), and di-pentaerythritol (Di-PE) in the presence of sulfuric acid as catalyst. The chem. structures of synthesized SFA PFAD-based esters were characterized and confirmed by using FTIR, NMR (1H and 13C) spectroscopies and GC-FID chromatog. The FTIR spectra of SFA PFAD-based ester products clearly showed the peaks of C=O and C-O of ester group at 1732-1740 cm-1 and at 1239-1162 cm-1, resp. Furthermore, 1H NMR spectra confirmed the proton chem. shift (-CH2-O-) of the ester group at 3.80-4.01 ppm. The 13C NMR spectra confirmed the carbon chem. shifts of ester carbonyl signals at 171.09-174.07 ppm and secondary carbons (CH2-C = O) at 40.57-42.44 ppm. The results showed that the optimum conditions for the esterification of SFA-TMP was obtained at acid catalysts of 5%, esterification time and temperature of 6 h and 150 鎺矯, resp. The results have shown the ester products yields have been significantly increased up to 93% with selectivity of 99% SFA-TMP tri-ester after the optimization process by using D-optimal design. The results for lubrication properties have shown that the SFA PFAD-based esters have low-temperature properties with pour points value in the range of 18-35 鎺矯, flash point (270-310 鎺矯), onset oxidative stability temperature (251-322 鎺矯) and viscosity indexes (115-131), resp. The results showed that the presence of many esters functional groups in the mol. structure of SFA PFAD-based esters provides a pos. impact on the lubrication properties. Overall, the results indicated that the SFA PFAD-based esters can be used as biolubricant base oils with pour point depressants.

Turkish Journal of Chemistry published new progress about Correlation analysis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zeng, Zhaomu; Chen, Yueyue; Geng, Xiuchao; Zhang, Yuhao; Wen, Xichao; Yan, Qingyu; Wang, Tingting; Ling, Chen; Xu, Yan; Duan, Junchao; Zheng, Kebin; Sun, Zhiwei published the artcile< NcRNAs: multi-angle participation in the regulation of glioma chemotherapy resistance (review)>, Category: esters-buliding-blocks, the main research area is review glioma NcRNA temozolomide cisplatin bevacizumab chemotherapy; chemoresistance; circRNAs; gliomas; lncRNAs; miRNAs; nanomedicine.

A review. As the most common primary tumor of the central nervous system, gliomas have a high recurrence rate after surgical resection and are resistant to chemotherapy, particularly high-grade gliomas dominated by glioblastoma multiforme (GBM). The prognosis of GBM remains poor despite improvements in treatment modalities, posing a serious threat to human health. At present, although drugs such as temozolomide, cisplatin and bevacizumab, are effective in improving the overall survival of patients with GBM, most patients eventually develop drug resistance, leading to poor clin. prognosis. The development of multidrug resistance has therefore become a major obstacle to improving the effectiveness of chemotherapy for GBM. The ability to fully understand the underlying mechanisms of chemotherapy resistance and to develop novel therapeutic targets to overcome resistance is critical to improving the prognosis of patients with GBM. Of note, growing evidence indicates that a large number of abnormally expressed noncoding RNAs (ncRNAs) have a central role in glioma chemoresistance and may target various mechanisms to modulate chemosensitivity. In the present review, the roles and mol. mechanisms of ncRNAs in glioma drug resistance were systematically summarized, the potential of ncRNAs as drug resistance markers and novel therapeutic targets of glioma were discussed and prospects for glioma treatment were outlined. ncRNAs are a research direction for tumor drug resistance mechanisms and targeted therapies, which not only provides novel perspectives for reversing glioma drug resistance but may also promote the development of precision medicine for clin. diagnosis and treatment.

International Journal of Oncology published new progress about Chemosensitivity. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Shu, Xiaomin; Zhong, De; Lin, Yanmei; Qin, Xiao; Huo, Haohua published the artcile< Modular Access to Chiral æµ?(Hetero)aryl Amines via Ni/Photoredox-Catalyzed Enantioselective Cross-Coupling>, Product Details of C19H34O2, the main research area is heterocyclic amine preparation enantioselective; alkyl benzamide aryl chloride cross coupling nickel photoredox catalyst.

A general and modular approach for the direct enantioselective æµ?arylation of saturated azacycles and acyclic N-alkyl benzamides such as N-benzylpyrrolidine, N-benzylazepane, N-benzoylpiperidine, etc. via nickel/photoredox dual catalysis was reported. This process exploits the hydrogen atom transfer ability of photoeliminated chlorine radicals to convert azacycles to the corresponding æµ?amino alkyl radicals, which were further coupled with ubiquitous and inexpensive (hetero)aryl chlorides such as 4-cyanobenzene, benzothiophene, 2-methoxypyrimidine, etc. These coupling reactions require no oxidants or organometallic reagents, feature feedstock starting materials, a broad substrate scope, and high enantioselectivities, and are applicable to late-stage diversification of medicinally relevant complex mols. Mechanistic studies suggest that the nickel catalyst uncommonly plays multiple roles, accomplishing chlorine radical generation, alpha-amino radical capture, cross-coupling, and asym. induction.

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

Madan, Renu; Goyal, Shikha published the artcile< Temozolomide Induced Cutaneous Reaction.>, Quality Control of 112-63-0, the main research area is .

There is no abstract available for this document.

Neurology India published new progress about 112-63-0. 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

Shah, Muddaser; Murad, Waheed; Ur Rehman, Najeeb; Mubin, Sidra; Al-Sabahi, Jamal Nasser; Ahmad, Manzoor; Zahoor, Muhammad; Ullah, Obaid; Waqas, Muhammad; Ullah, Saeed; Kamal, Zul; Almeer, Rafa; Bungau, Simona G.; Al-Harrasi, Ahmed published the artcile< GC-MS Analysis and Biomedical Therapy of Oil from n-Hexane Fraction of Scutellaria edelbergii Rech. f.: In Vitro, In Vivo, and In Silico Approach>, Synthetic Route of 112-63-0, the main research area is hexane oil scutellaria edelbergii biomedical therapy; GC-MS analysis; analgesic assay; anti-diabetics; anti-inflammatory; antibacterial activity; antioxidants.

The current study aimed to explore the crude oils obtained from the n-hexane fraction of Scutellaria edelbergii and further analyzed, for the first time, for their chem. composition, in vitro antibacterial, antifungal, antioxidant, antidiabetic, and in vivo anti-inflammatory, and analgesic activities. For the phytochem. composition, the oils proceeded to gas chromatog.-mass spectrometry (GC-MS) anal. and from the resultant chromatogram, 42 bioactive constituents were identified. Among them, the major components were linoleic acid Et ester (19.67%) followed by Et oleate (18.45%), linolenic acid Me ester (11.67%), and palmitic acid Et ester (11.01%). Tetrazolium 96-well plate MTT assay and agar-well diffusion methods were used to evaluate the isolated oil for its min. inhibitory concentrations (MIC), min. bactericidal concentration (MBC), half-maximal inhibitory concentrations (IC50), and zone of inhibitions that could determine the potential antimicrobial efficacy閳ョç? Anti-glucosidase potential was visualized through mol. docking simulations where ten compounds of the oil were found to be the leading inhibitors of the selected enzyme based on interactions, binding energy, and binding affinity. The oil from the n-hexane fraction of S. edelbergii contained valuable bioactive constituents that can act as in vitro biol. and in vivo pharmacol. agents. However, further studies are needed to uncover individual responsible compounds of the observed biol. potentials which would be helpful in devising novel drugs.

Molecules published new progress about Anti-inflammatory agents. 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

Erika L. Ponce A; Ochoa-Herrera, Valeria; Quintanilla, Francisco; Egas, David A.; Mora, Jose R. published the artcile< Optimization of a Gas Chromatography Methodology for Biodiesel Analysis>, Formula: C19H34O2, the main research area is fatty acid methyl ester biodiesel gas chromatog optimization transesterification.

Biodiesel from four different renewable resources was produced. An optimization of the reference methodol. by gas chromatog. was conducted based on the construction of calibration curves for each biodiesel during fatty acid Me esters (FAME) quantification. Therefore, in the proposed optimized methodol., pure com. standards are not necessary. Consequently, a reduction in the research expenses is achieved, making this methodol. a cost-effective alternative for FAME quantification. The calibration curves obtained for each biodiesel presented slope values between 0.5-0.7 and regression coefficients (R2) > 0.98 in all cases. These results were compared to those obtained by the conventional methodol. With respect to the validation of the optimized methodol., a comparison of the results obtained by this proposed methodol. and the reference one is presented. Finally, a robust and promising technique to quantify FAME present in biodiesel was successfully developed in this study.

Journal of Analytical Chemistry published new progress about Biodiesel fuel. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

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

Kimura, Toshihiro; Kamata, Keigo; Mizuno, Noritaka published the artcile< Bifunctional Tungstate Catalyst for Chemical Fixation of CO2 at Atmospheric Pressure>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is aromatic diamine propargylic alc carbon dioxide fixation tungstate catalyst; heterocycle cyclic urea carbonate quinazolinedione preparation reaction mechanism.

The authors report the first example of tungstate-based catalytic fixation of carbon dioxide (CO2). A simple monomeric tungstate, TBA[WO4] (TBA = n-Bu4N+) acts as a highly efficient homogeneous catalyst for chem. fixation of CO2 with aromatic diamines, 2-aminobenzonitriles, and propargylic alcs. to give urea derivatives quinazoline-2,4(1H,3H)-diones, and cyclic carbonates, resp. The 1H and 13C NMR spectra show the specific interaction of the tungsten-oxo moiety in TBA[WO4] with both CO2 and the substrate. This study also shows the importance of developing bifunctional catalysts which can activate both CO2 and a nucleophile (amines, alcs., etc.).

Angewandte Chemie, International Edition published new progress about Alcohols, propargyl Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Zhai, Shiyang; Zhang, Huimin; Chen, Rui; Wu, Jiangxia; Ai, Daiqiao; Tao, Shunming; Cai, Yike; Zhang, Ji-Quan; Wang, Ling published the artcile< Design, synthesis and biological evaluation of novel hybrids targeting mTOR and HDACs for potential treatment of hepatocellular carcinoma>, SDS of cas: 112-63-0, the main research area is hepatocellular carcinoma mTOR HDAC1 antiproliferative drug deign mol docking; HDACs; Hepatocellular carcinoma; Hybrids; mTOR.

Hepatocellular carcinoma (HCC) is a major contributor to global cancer incidence and mortality. Many pathways are involved in the development of HCC and various proteins including mTOR and HDACs have been identified as potential drug targets for HCC treatment. In the present study, two series of novel hybrid mols. targeting mTOR and HDACs were designed and synthesized based on parent inhibitors (MLN0128 and PP121 for mTOR, SAHA for HDACs) by using a fusion-type mol. hybridization strategy. In vitro antiproliferative assays demonstrated that these novel hybrids with suitable linker lengths exhibited broad cytotoxicity against various cancer cell lines, with significant activity against HepG2 cells. Notably, DI06, an MLN0128-based hybrid, exhibited antiproliferative activity against HepG2 cells with an IC50 value of 1.61娓璏, which was comparable to those of both parent drugs (MLN0128, IC50 = 2.13娓璏 and SAHA, IC50 = 2.26娓璏). In vitro enzyme inhibition assays indicated that DI06, DI07 and DI17 (PP121-based hybrid) exhibited nanomolar inhibitory activity against mTOR kinase and HDACs (e.g., HDAC1, HDAC2, HDAC3, HADC6 and HADC8). Cellular studies and western blot analyses uncovered that in HepG2 cells, DI06 and DI17 induced cell apoptosis by targeting mTOR and HDACs, blocked the cell cycle at the G0/G1 phase and suppressed cell migration. The potential binding modes of the hybrids (DI06 and DI17) with mTOR and HDACs were investigated by mol. docking. DI06 displayed better stability in rat liver microsomes than DI07 and DI17. Collectively, DI06 as a novel mTOR and HDACs inhibitor presented here warrants further investigation as a potential treatment of HCC.

European Journal of Medicinal Chemistry published new progress about Acetylated histone H3 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Hu, Jin; Yang, Ruhan; Zhang, Li; Chen, Ying; Sheng, Xinxin; Zhang, Xinya published the artcile< Robust, transparent, and self-healable polyurethane elastomer via dynamic crosslinking of phenol-carbamate bonds>, Related Products of 112-63-0, the main research area is transparent self healable polyurethane elastomer crosslinking phenol carbamate bond.

Intrinsic self-healing materials designed through the incorporation of noncovalent interactions or dynamic covalent bonds are prized for their ability to recover from mech. damages. However, they often suffer from deteriorated mech. property due to the increased chain mobility. In this work, we reported a high-strength, colorless transparent self-healing polyurethane elastomer through dynamic crosslinking of reversible phenol-carbamate bonds. Tetrabromobisphenol A (TBBPA) and Pr gallate (PG) were used as the dynamic chain extender and dynamic crosslinking agent, resp. They both can be effectively deblocked at mild temperatures ensuring that the self-healing efficiency is not affected by the material formulation. The mech. properties can be tailored in a wide range by varying the crosslink d. and hard segment content, and their combination uniquely determines the material formulation. The phenol-carbamate based polyurethane (PPU) with a hard segment of 60% and a crosslink d. ç’?of 0.5 mmol cm-3 exhibited a tensile strength up to 46.4 MPa at the break strain of 615% and displayed high elastic resilience. In the meantime, it could be fully healed (鐣忚ç†?= 93%) with 2 h of heating at 100鎺矯 after completely cut off. After recycled three times, it still maintained 80% of its original tensile strength. The structural rigidity of the crosslinker PG and the highly reversible phenol-carbamate bond play a crucial role in strengthening the mech. strength while maintaining the self-healing efficiencies at elevated temperatures This work provides a feasible strategy to prepare mech. robust crosslinked polyurethane elastomer with high self-healing efficiency in a cost-effective manner.

Polymer published new progress about Complex modulus, tan � 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