Month: November 2022

Samir, Eman M.; Mohareb, Rafat M. published the artcile< Novel synthesis of pyran-3-hydrazide derivatives and their uses to the synthesis hydrazide-hydrazone, pyrazole and thiazole derivatives with anticancer activities>, Synthetic Route of 623-50-7 , the main research area is hydrazone pyrazole thiazole pyran hydrazide derivative anticancer activity.

The multi-component reaction of Et acetoacetate with each of malononitrile (3) benzaldehyde (1) in ethanol containing triethylamine gave the Et 6-amino-5-cyano-2-methyl-4-phenyl-4H-pyran-3-carboxylate (4). The latter compound reacted with hydrazine hydrate to give the hydrazide derivative 6. Compound 6 underwent a series of hetero-cyclization reactions to give pyrzole, hydraide-hydrazone, thiazole derivatives The produced compounds tested against cancer cell lines six cancer cell lines and showed that compounds 8b, 10b, 11a, 17a, 21 and 24a were the most cytotoxic compounds Further tests of the latter compounds toward the five tyrosine kinases and Pim-1 kinase showed that compounds 10b, 21 and 24a were the most potent of the tested compounds and compounds 10a, 11a and 17a were of the highest inhibitions toward Pim-1 kinase. The high inhibitions of most of the tested compounds toward the selected cancer cell lines and the tyrosine kinases encourage for future work to be done.

Bulletin of the Chemical Society of Ethiopia published new progress about Antitumor agents. 623-50-7 belongs to class esters-buliding-blocks, and the molecular formula is C4H8O3, Synthetic Route of 623-50-7 .

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

Figueroa-Diaz, Andrea Belen; Carlos-Hernandez, Salvador; Diaz-Jimenez, Lourdes published the artcile< Crude glycerol/guishe based catalysts for biodiesel production: conforming a guishe biorefinery>, Reference of 112-63-0, the main research area is glycerol guishe catalyst biodiesel production.

Biodiesel production imposes some challenges, such as the crude glycerol management and cleaning requirements of biodiesel produced by homogeneous transesterification. Heterogeneous catalysts based on residual biomass have been proposed to tackle these challenges; in addition, biomass revalorization is fundamental for biorefineries development. In this research, two organic wastes (crude glycerol and guise) are used to synthesize carbonaceous catalysts. Four catalysts, with different crude glycerol/guishe proportions, were prepared by pyrolysis at 800 and 900°C, followed by a chem. functionalization with H2SO4. SEM (SEM), Fourier transform IR spectroscopy (FT-IR), and thermal gravimetric anal. (TGA) were used to characterize the catalysts. The performance of the catalysts was evaluated in a soybean oil transesterification reaction. The crude glycerol/guishe based catalysts lead to similar biodiesel yields than the obtained with a conventional homogeneous catalyst (CH3NaO). The catalyst identified as BS-25-8 (a mixture of 25% guishe and 75% crude glycerol, pyrolyzed at 800°C and sulfonated), in a proportion of 1 wt%, achieved the highest fatty acid Me esters (FAME) yield (99%) in the transesterification reaction, even surpassing the performance of the CH3NaO (yield of 93%).

Catalysts published new progress about Biodiesel fuel. 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

Tang, Xuyuan; Li, Xiuyi; Zhang, Dongyan; Han, Wei published the artcile< Astragaloside-IV alleviates high glucose-induced ferroptosis in retinal pigment epithelial cells by disrupting the expression of miR-138-5p/Sirt1/Nrf2>, Reference of 347174-05-4, the main research area is ferroptosis astragaloside IV Sirt1 Nrf2 mitochondrial damage; AS-IV; DR; RPE; astragaloside-IV; diabetic retinopathy; retinal pigment epithelial.

Astragaloside-IV (AS-IV) (C41H68O14) is a high-purity natural product extracted from Astragalus, which has demonstrated biol. activities. However, the effect of AS-IV on retinal pigment epithelial (RPE) cells in diabetic retinopathy (DR) remains unclear. In this study, high glucose (HG) was shown to promote ARPE-19 RPE cell death, increase the contents of reactive oxygen species (ROS) and oxidized glutathione (GSSG), and enhance lipid peroxidation d. of mitochondrial membrane. In contrast, AS-IV decreased glutathione (GSH) content, mitochondria size and ridge. Addition of iron death inhibitor Ferrostatin-1 (Fer-1) to RPE cells decreased cell dead rate, thus indicating that HG-induced mitochondrial damage occurred due to ferroptosis. AS-IV alleviated HG-induced RPE cell damage. Furthermore, HG decreased levels of silent information regulator 1 (Sirt1) and nuclear factor (erythroid-derived 2)-like 2 (Nrf2) in the nucleus of RPE cells; AS-IV could alleviate these effects and increased expression of glutathione peroxidase 4 (GPX4), glutamate cysteine ligase (GCLM) and glutamate cysteine ligase catalytic subunit (GCLC), which are Nrf2 downstream genes. Mechanistically, AS-IV was shown to alleviate the effects of HG by increasing mir-138-5p expression in RPE cells and promoting expression of Sirt1 and Nrf2 in the nucleus. Transfection of mir-138-5p agonist inhibited the regulatory effects of AS-IV on Sirt1 and Nrf2, accompanied by decreased GPX4, GCLM and GCLC levels, and restoration of ferroptosis-related changes. Collectively, HG increased ferroptosis rate in RPE cells. In addition, AS-IV inhibited miR-138-5p expression, subsequently increasing Sirt1/Nrf2 activity and cellular antioxidant capacity to alleviate ferroptosis, resulting decreased cell death, which potentially inhibits the DR pathol. process.

Bioengineered published new progress about Antioxidants. 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, Reference of 347174-05-4.

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

Dayaker, Gandrath; Krishna, Palakodety Radha published the artcile< Olefin Cross-Metathesis: Studies towards the Total Synthesis of (+)-Bitungolide F>, Formula: C6H10O5, the main research area is bitungolide preparation total synthesis.

S stereoselective synthesis of (5S,6S)-6-[(2S,5S,7R,8E,10E)-5-(benzyloxy)-7-{[(tert-butyl)dimethylsilyl]oxy}-11-phenylundeca-8,10-dien-2-yl]-5-ethyl-5,6-dihydro-2H-pyran-2-one [i.e., 9-O-benzyl-11-O-[(tert-butyl)dimethylsilyl]bitungolide F] is reported. The strategy involves Gilman reaction, olefin cross-metathesis, and Horner-Wadsworth-Emmons olefination as key steps. The synthesis of the target compound was achieved using((2S)-2-(hydroxy)butanedioic acid (L-malic acid) as a simple starting material.

Helvetica Chimica Acta published new progress about Alkenylation. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Formula: C6H10O5.

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

Cai, Xing Hong; Yang, Qiang; Hui, Qun; Wang, Min published the artcile< First-principles calculations of molecular adsorption on the surface of two-dimensional BCOH>, HPLC of Formula: 112-63-0, the main research area is benzenetriboronic acid mol adsorption electronic property.

A two-dimensional structure by the dehydration reaction of 1,3,5-benzenetriboronic acid (shorted as BCOH) is investigated. BCOH is dynamically and thermally stable. It is an indirect semiconductor possessing a band gap of 3.83 eV. The adsorption behavior of CO, CO2, H2, H2O, NH3, NO and NO2 on BCOH are mainly investigated. The results show that most of the gas mols. prefer to adsorb at the interval sites (I1 or I3). The adsorption energies of NO and NO2 are lower than the other mols., revealing that NO and NO2 have better adsorption affinity on BCOH. Except NO and NO2, the band gaps are slightly changed with the mol. adsorption. When NO or NO2 is adsorbed on BCOH, the band gap becomes zero, revealing that a semiconductor-to-metal transition occurs and the conductivity is improved a lot. Thus, BCOH may provide promising potentials for the detection of nitrogen oxides (NO or NO2).

Chemical Physics published new progress about Adsorption. 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

Navarre, Laure; Martinez, Remi; Genet, Jean-Pierre; Darses, Sylvain published the artcile< Access to enantioenriched α-amino esters via rhodium-catalyzed 1,4-addition/enantioselective protonation>, HPLC of Formula: 112-63-0, the main research area is amino acid ester asym preparation; aryltrifluoroborate amino acrylate conjugate addition protonation rhodium.

Conjugate addition of potassium trifluoro(organo)borates to dehydroalanine derivatives, mediated by a chiral rhodium catalyst and in situ enantioselective protonation, afforded straightforward access to a variety of protected α-amino esters with high yields and enantiomeric excesses up to 95%. Among the tested chiral ligands and proton sources, Binap, in combination with guaiacol (2-methoxyphenol), an inexpensive and nontoxic phenol, afforded the highest asym. inductions. Organostannanes have also shown to participate in this reaction. By a fine-tuning of the ester moiety, and using Difluorophos as chiral ligand, increased levels of enantioselectivity, generally close to 95%, were achieved. Deuterium labeling experiments revealed, and DFT calculation supported, an unusual mechanism involving a hydride transfer from the amido substituent to the α carbon explaining the high levels of enantioselectivity attained in controlling this α chiral center.

Journal of the American Chemical Society published new progress about Amino acid esters Role: SPN (Synthetic Preparation), PREP (Preparation). 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

Shamout, Fadi; Monaco, Alessandra; Yilmaz, Gokhan; Becer, Caglar Remzi; Hartmann, Laura published the artcile< Synthesis of Brush-Like Glycopolymers with Monodisperse, Sequence-Defined Side Chains and Their Interactions with Plant and Animal Lectins>, Application In Synthesis of 71195-85-2, the main research area is glycopolymer lectin interaction; brush polymers; glycopolymers; lectins; multivalency; sequence-defined.

The synthesis of brush glycopolymers mimicking the architecture of proteoglycans is achieved by grafting sequence-defined glycooligomers derived from solid-phase polymer synthesis onto a poly(active ester) scaffold. This approach gives access to a first library of brush glycopolymers with controlled variations in the degree of branching and number of carbohydrate ligands per branch. When studying lectin binding of linear and brush glycopolymers to lectins Con A (ConA), dendritic cell-specific intercellular adhesion mol.-3-grabbing non-integrin (DC-SIGN), and mannose-binding lectin (MBL), different preferences are observed with MBL showing higher binding to linear glycopolymer and ConA and DC-SIGN favoring brush glycopolymers. This finding suggests that the architecture of polymeric glycan mimetics affects binding to lectins not only in terms of creating higher avidity but potentially also selectivity ligands.

Macromolecular Rapid Communications published new progress about Dendritic cell. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Application In Synthesis of 71195-85-2.

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

Manjunathan, Pandian; Shanbhag, Dhanush Y.; Vinu, Ajayan; Shanbhag, Ganapati V. published the artcile< Recognizing soft templates as stimulators in multivariate modulation of tin phosphate and its application in catalysis for alkyl levulinate synthesis>, Electric Literature of 112-63-0, the main research area is tin phosphate catalysis alkyl levulinate.

Catalyst synthesis is an art where an inefficient material can be remarkably converted into a highly active and selective catalyst by adopting a suitable synthetic strategy to tune its properties during synthesis. The underlying principle of the strategy presented here is the integration of tailoring the structural and chem. behavior of tin phosphates with tuned catalytic active centers directed by employing different structure directing agents (SDAs) and the attempt to understand this in detail. It is demonstrated how soft templates can be effectively used for their so far unknown utilization of tuning the active sites in phosphate containing catalysts. We found that, by using an appropriate synthesis strategy, it is possible to tune and control explicitly both the catalyst morphol. and the nature of active sites at the same time. The 31P MAS NMR study revealed that employing SDAs in the synthesis strongly influenced the nature and amount of phosphate species in addition to porosity. The resultant different nanostructured SnPO catalysts were investigated for one-pot synthesis of alkyl levulinates via alcoholysis of furfuryl alc. Among the catalysts, SnPO-P123 exhibited greater Bu levulinate yield via alcoholysis of furfuryl alc. with n-butanol and the study was extended to synthesize different alkyl levulinates. Importantly, the active sites in the SnPO-P123 catalyst responsible for the reaction were elucidated by a study using 2,6-lutidine as a basic probe mol. This study therefore provides an avenue for rational design and construction of highly efficient and robust nanostructured SnPO catalysts to produce alkyl levulinates selectively.

Catalysis Science & Technology published new progress about Alcoholysis. 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

Nagashima, Yuki; Takita, Ryo; Yoshida, Kengo; Hirano, Keiichi; Uchiyama, Masanobu published the artcile< Design, Generation, and Synthetic Application of Borylzincate: Borylation of Aryl Halides and Borylzincation of Benzynes/Terminal Alkyne>, Electric Literature of 112-63-0, the main research area is borylzincate formation mol structure calculation; borylation aryl halide borylzincation benzyne terminal alkyne; zinc catalyzed borylation aryl halide.

Borylzincate was generated in situ from dialkylzinc, diboron, and metal alkoxide. Model DFT calculations showed that although the formation of boryl-zinc-ate is kinetically favorable, it is thermodynamically unfavorable. Therefore, we designed a successive reaction sequence that would provide a compensating energy gain. This enabled Zn-catalyzed borylation of aryl halides and boryl-zincation of benzynes and terminal alkyne from diborons without the need for any cocatalyst.

Journal of the American Chemical Society published new progress about Alkynes, α- 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

Zhao, Yan; Kong, Xiao; Yang, Xiaoyin; Zhu, Lixian; Liang, Rongrong; Luo, Xin; Zhang, Liang; Hopkins, David L.; Mao, Yanwei; Zhang, Yimin published the artcile< Effect of energy metabolism and proteolysis on the toughness of intermediate ultimate pH beef>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is longissimus lumborum beef energy metabolism toughness pH; Beef; Intermediate pH(u); Targeted metabolomics; Tenderness.

The objective of this study was to identify the tenderness and energy metabolism attributes in normal ultimate pH (pHu, 5.4-5.8, NpHu), intermediate pHu (5.8-6.2, IpHu) and high pHu (> 6.2, HpHu) Longissimus lumborum from beef. During 21 days of aging, the IpHu group exhibited a higher Warner-Bratzler shear force, lower activity of μ-calpain, and a higher content of heat shock protein 27 and greater protein oxidation Metabolomics anal. revealed that 24 differential metabolites were detected during the first 24 h postmortem between pH groups, and these were mainly the products of glycolysis, the tricarboxylic acid (TCA) cycle and oxidative phosphorylation. The relatively higher ATP content in the IpHu group could delay tenderization by being used as key substrate for protein phosphorylation. In addition, the relationship between guanosine triphosphate, diphosphate and monophosphate, and beef tenderness was worthy to be verified in the future study.

Meat Science published new progress about Beef. 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