Month: October 2022

Bhardwaj, Monika; Rasool, Faheem; Tatina, Madhu Babu; Mukherjee, Debaraj published the artcile< Construction of Fused Oxabicyclic Scaffolds from Glycals and Styrenes via One-Pot Domino Transformations>, COA of Formula: C12H16O7, the main research area is arylcyclopentenofuran arylnaphthopyran diastereoselective nonracemic preparation; triflic acid catalyst ring opening cyclocondensation glycosylation styrene glycal; stereoselective tandem ring opening cyclocondensation styrene glycal dichloromethane solvent; tandem Ferrier glycosylation Friedel Crafts reaction styrene glycal arene; mechanism kinetic isotope effect cyclocondensation styrene glucal benzene.

Glycals underwent diastereoselective cascade ring opening and cyclocondensation reactions with styrenes in the presence of TfOH in CH2Cl2 to yield arylcyclopentenofurans such as I. When either benzene or toluene was used as solvent, glycals underwent diastereoselective cascade Ferrier C-glycosylation and double Friedel-Crafts reactions with styrenes in the presence of TfOH to yield arylnaphthopyrans (oxadecalins) such as II. The mechanism of the reaction of triacetoxy-D-glucal with styrene in benzene was studied by isolation of intermediates and by determination of the deuterium kinetic isotope effect which provided evidence for the C-glycosylation as the slow step in the reaction. A mechanism for the reactions is proposed.

Organic Letters published new progress about Cyclic ethers Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 4098-06-0 belongs to class esters-buliding-blocks, and the molecular formula is C12H16O7, COA of Formula: C12H16O7.

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

Tan, Zhangbin; Jiang, Xiaoli; Zhou, Wenyi; Deng, Bo; Cai, Min; Deng, Suihui; Xu, Youcai; Ding, Wenjun; Chen, Guanghong; Chen, Ruixue; Zhang, Shuangwei; Zhou, Yingchun; Liu, Bin; Zhang, Jingzhi published the artcile< Taohong siwu decoction attenuates myocardial fibrosis by inhibiting fibrosis proliferation and collagen deposition via TGFBR1 signaling pathway>, Reference of 112-63-0, the main research area is myocardial fibrosis proliferation TGFBR1 signaling pathway; Cell proliferation; Collagen deposition; Myocardial fibrosis after myocardial infarction; TGFBR1; Taohong siwu decoction.

The purpose of current study was to explore the potential mechanism action and anti-myocardial fibrosis effects of treatment with THSWD in vivo and in vitro. Mouse underwent ligation of coronary artery to induce MI and divided equally into the sham group, model group and THSWD treatment groups. After 4 wk, the effects of THSWD treatment on cardiac function were estimated by echocardiog. HE staining was used to detect the pathol. changes and Masson trichrome staining was used to estimate tissue fibrosis. To further explore the regulatory mol. mechanisms of THSWD, transcriptome anal. was performed. Treatment with THSWD significantly decreased myocardial fibrosis and recovered cardiac function in the post-MI mouse. The transcriptomics data imply that the TGF-β pathway might be a target in the anti-fibrosis effect of THSWD. THSWD inhibits TGF-β1-induced proliferation of primary cardiac fibroblasts. THSWD decreased collagen expression and TGFBR1 and Smad2/3 phosphorylation. Moreover, the inhibitory effect of THSWD on CFs proliferation and collagen deposition, as well as TGFBR1 signaling pathway-associated proteins expression was partially abrogated by overexpression of TGFBR1. Collectively, the results implicate that THSWD attenuates myocardial fibrosis by inhibiting fibrosis proliferation and collagen deposition via inhibiting TGFBR1, and might be a potential therapeutic agent for treatment of myocardial fibrosis post-MI.

Journal of Ethnopharmacology published new progress about Adenoviral vectors. 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

Ma, Xiantao; Xu, Qing; Li, Huan; Su, Chenliang; Yu, Lei; Zhang, Xu; Cao, Hongen; Han, Li-Biao published the artcile< Alcohol-based Michaelis-Arbuzov reaction: an efficient and environmentally-benign method for C-P(O) bond formation>, Electric Literature of 112-63-0, the main research area is Michaelis Arbuzov green alc carbon phosphorus bond formation; phosphonate phosphinate phosphine oxide preparation.

The famous Michaelis-Arbuzov reaction is extensively used both in the laboratory and industry to manufacture tons of widely-used organophosphoryl compounds every year. However, this method and the modified Michaelis-Arbuzov reactions developed recently still have some limitations. We now report a new alc.-version of the Michaelis-Arbuzov reaction that can provide an efficient and environmentally-benign method to address the problems of the known Michaelis-Arbuzov reactions. That is, a wide range of alcs. can readily react with phosphites, phosphonites, and phosphinites to give all the three kinds of phosphoryl compounds (phosphonates, phosphinates, and phosphine oxides) using an n-Bu4NI-catalyzed efficient C-P(O) bond formation reaction. This general method can also be easily scaled up and used for further synthetic transformations in one pot.

Green Chemistry 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, Electric Literature of 112-63-0.

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

Voelter, Wolfgang; Kuhfittig, Gisela; Schneider, Gottfried; Bayer, Ernst published the artcile< Conformational analysis of aldoses by means of circular dichroism>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is circular dichroism spectra sugar conformation; sugar conformation CD spectra; spectra CD sugar conformation; conformation sugar CD spectra; Cotton effect sugar conformation.

Molybdate complexes of sugars with their first 3 C atoms in axial/equatorial/axial cis position showed 3 or 4 Cotton effects between 350-220 nm. When the OH groups at C-2 and C-3 were trans, only 2 Cotton effects of opposite signs were found in the same region. Molybdate complexes of D-altrose, 6-O-methyl-D-glucose, D-allose, D-gulose, and D-talose showed the expected CD bands.

Justus Liebigs Annalen der Chemie published new progress about Conformation. 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

Rauter, Michael T.; Augustin, Matthias; Spitthoff, Lena; Svensson, Ann Mari published the artcile< Product formation during discharge: a combined modelling and experimental study for Li-O2 cathodes in LiTFSI/DMSO and LiTFSI/ TEGDME electrolytes>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is lithium bistrifluoromethanesulfonylimide dimethylsulfoxide tetraethylene glycol dimethyl ether electrolyte cathode.

Li-air or Li-O2 batteries are a promising energy storage technol. due to the potentially high energy d. However, significant challenges related to reversible charge/discharge of these cells need to be solved. The discharge reaction is generally agreed to proceed via two main routes, which may occur simultaneously. These are the surface mechanism, leading to Li2O2 product formation as surface films, or the solution mechanism, with solid particles formed in the pore structure of the cathode. A detailed understanding of the reaction mechanisms and the dynamic performance of the electrodes is key to further improvements. Here, we present a math. model for the discharge process, based on porous electrode theory, including effects of reactant transport and kinetic limitations, as well as the continuous change of properties due to the formation of reaction products via the solution mechanism and the surface mechanism. The model describes the dynamic change in the ratio of the surface and solution mechanism as a function of growth of film thickness, in line with recent findings. The model is able to predict the differences in exptl. obtained discharge curves between DMSO and tetra ethylene glycol di-Me ether solvents with 1M LiTFSI, with a min. of free parameters. The model parameters are based on phys. characterization of the materials and the electrodes, or determined by fitting to impedance spectra recorded during the discharge. The developed model and the methodol. will provide a powerful tool for optimization of such electrodes.

Journal of Applied Electrochemistry published new progress about Battery cathodes. 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

Da Silva, Marcio Jose; Chaves, Diego Morais; Teixeira, Milena Galdino; Oliveira Bruziquesi, Carlos Giovani published the artcile< Esterification of levulinic acid over Sn(II) exchanged Keggin heteropolyacid salts: An efficient route to obtain bioadditives>, Formula: C19H34O2, the main research area is esterification levulinate tin exchanged Keggin heteropolyacid bioadditive.

In this paper, we describe a process to add value to the biomass derivatives (i.e., levulinic acid), converting it to bioadditives over solid Sn(II) exchanged Keggin heteropolyacid salts. These solid catalysts are an attractive alternative to the traditional soluble and corrosive Bronsted acid catalysts. Among Sn(II) heteropoly salts, the Sn1.5PW12O40 was the most active and selective catalyst, achieving high conversions (ca. 90%) and selectivity (90-97%) for alkyl esters and angelica lactone, the main reaction products. The impacts of the main reaction parameters (i.e., catalyst load, temperature, and the molar ratio of alc. to acid) were investigated. The use of renewable raw material, and an efficient and recyclable catalyst are the main pos. features of this process. The Sn1.5PW12O40 catalyst was easily recovered and reused without loss activity.

Molecular Catalysis published new progress about Esterification. 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

Boger, Dale L.; Panek, James S. published the artcile< Preparation of (R)-(+)- and (S)-(-)-4-iodo-1,2-epoxybutane [(R)- and (S)-(2-iodoethyl)oxirane], useful chiral synthons>, Recommanded Product: (S)-Dimethyl 2-hydroxysuccinate, the main research area is iodoepoxybutane stereoselective preparation; epoxybutane iodo stereoselective preparation; malic acid reduction; butanetriol base catalyzed ring closure; iodoethyloxirane stereoselective preparation; oxirane iodoethyl stereoselective preparation.

S-Epoxybutane I (R = iodo) was prepared by LiAlH4 reduction of S-R1CH2CH(OR2)R1 (II; R1 = MeO2C, R2 = 2-tetrahydropyranyl) followed by mesylation and hydrolysis to give S-II (R1 = CH2OSO2Me, R2 = H) which was treated with K2CO3 to give S-I (R = OSO2Me) which was then iodinated by NaI. Reduction of S-II (R1 = CO2Me, R2 = MeOCMe2) followed by acetylation in the presence of 4-dimethylaminopyridine gave S-II (R1 = AcOCH2) (III). III was hydrolyzed and then mesylated to give S-II (R2 = OSO2Me) which was treated with K2CO3 and MeOSO2Cl to give R-I (R = CH2OSO2Me) (IV). Treating IV with NaI at 25° gave R-I (R = iodo).

Journal of Organic Chemistry published new progress about 617-55-0. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Recommanded Product: (S)-Dimethyl 2-hydroxysuccinate.

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

Liu, Si-Xian; Tsai, Yun-Tzu; Lin, Yu-Tung; Li, Jia-Yue; Chang, Che-Chien published the artcile< Design and synthesis of trivalent Tn glycoconjugate polymers by nitroxide-mediated polymerization>, Formula: C12H16O7, the main research area is synthesis trivalent Tn glycoconjugate polymer nitroxide mediated polymerization.

A new synthetic method for preparing Tn glycoconjugate polymers, containing tumor-associated carbohydrate antigens, by controlled living radical polymerization is reported. To mimic the authentic structures of Tn glycopeptide antigens and to explore the controlled living radical polymerization, three tumor-associated carbohydrate antigens (GalNAc, GalNAcα1-O-Ser, and GalNAcα1-O-Thr) were attached to a styrene-type monomer through a diethylene glycol spacer. Under nitroxide-mediated polymerization, controlled living radical polymerization proceeded to afford defined glycopeptide polymers with different Tn densities and compositions The polydispersity index (PDI) and mol. weights were increased and conversions were decreased upon increasing the concentration of Tn glycoconjugate monomers. The resulting Tn glycoconjugate polymers were characterized by NMR and IR. The spectral data indicate that the Tn glycoconjugate moiety did attach to the polymer chain and Tn glycoconjugate d. could be adjusted through the nitroxide-mediated polymerization conditions. The number of Tn units containing in the polymer chains could be estimated by NMR integration. This synthetic approach provides a new and efficient tool for constructing novel Tn glycoconjugate polymers.

Tetrahedron published new progress about Tumor antigens Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 4098-06-0 belongs to class esters-buliding-blocks, and the molecular formula is C12H16O7, Formula: C12H16O7.

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

Wang, Hongling; Wang, Yuhuang; Chen, Xingkuan; Mou, Chengli; Yu, Shuyan; Chai, Huifang; Jin, Zhichao; Chi, Yonggui Robin published the artcile< Chiral Nitroarenes as Enantioselective Single-Electron-Transfer Oxidants for Carbene-Catalyzed Radical Reactions>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is carbene catalyzed radical hydroxylation enal; chiral nitroarene enantioselective single electron transfer oxidant.

A new class of chiral oxidants is developed. These readily accessible oxidants contain a nitro group for oxidation and a chiral sulfonamide moiety for stereoselectivity control. The chiral information from the oxidants can effectively transfer to the substrates in carbene-catalyzed β-hydroxylation of enals via single-electron-transfer radical processes. We expect these oxidants to find unique applications in other asym. oxidations and oxygen-atom-transferring reactions.

Organic Letters published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 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

Zhang, Zhi-wen; Pan, Rui-long; Wu, Jie-ying published the artcile< Synthesis and optical properties of a novel quinoline derivative>, COA of Formula: C19H34O2, the main research area is optical property quinoline derivative synthesis.

A novel quinoline derivative, 8-[N-{4-[4-(di-Ph amine) styryl] phenyl}] acetyl amino oxyl quinoline (1), was synthesized from triphenylamine and 8-hydroxylquinoline by formylation, Wittig-hornor reaction, substitution reaction and so on. The structure was characterized by 1H NMR, 13C NMR, IR and ESI-MS. The optical properties of 1 were investigated by UV-Vis and fluorescence spectroscopies. The results showed that λmax of 1 is 300 nm and 375 nm. The maximum peak of 1 was at 450 nm under excitation wavelengths of 375 nm in EtOH.

Hecheng Huaxue published new progress about Crystallinity. 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