Category: 112-63-0

Marques Mota, Filipe; Kim, Yeonseo; Hong, Haeji; Yu, Subin; Lee, Sangheon; Kim, Dong Ha published the artcile< Revisiting Solvent-Dependent Roles of the Electrolyte Counteranion in Li-O2 Batteries upon CO2 Incorporation>, Application In Synthesis of 112-63-0, the main research area is revisiting solvent dependent roles electrolyte counteranion lithium oxygen battery.

Lithium-oxygen batteries are promising next-generation high-energy storage candidates. Replacing pure O2 with air and uncovering moisture and CO2-contamination effects on the O2 electrochem., however, represent necessary steps toward commercialization. Representatively, a CO2-induced shift toward Li2CO3 formation has been systematically disclosed in a number of electrolyte solvents. Here, we show that in tetraglyme only Li2CO3 is formed without Li2O2. Using explicit theor. calculations, we reveal that discharge is governed by the strong chelation effect induced by oxygen lone electron pairs of the glyme, which emphasizes the importance of assessing direct interat. interactions between Li+ and solvent mols. when determining preferred reaction pathways in these O2/CO2 systems. The choice of the electrolyte counteranion investigated here for the first time, however, has no apparent effect on the O2/CO2 electrochem., leading to Li2CO3. Galvanostatic results and product analysisnonetheless reveal that highly dissociated Li+ counteranions in tetraglyme favorably stabilize soluble peroxocarbonate reaction intermediates during discharge, whereas highly associated salts accelerate Li2CO3 precipitation, dramatically narrowing the cell capacity. Importantly, these observations are also distinct from prior conclusions from rationally designed electrolytes under pure O2 conditions and emphasize the need to revisit established correlations between uncovered counteranion···Li+···solvent interaction degrees and the balance between mechanistic pathways in practical Li-air devices.

ACS Applied Energy Materials published new progress about Battery electrolytes. 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

Sun, Wei; Chen, Rong; Cheng, Xinjian; Marin, Luminita published the artcile< Bodipy-based chemosensors for highly sensitive and selective detection of Hg2+ ions>, Formula: C19H34O2, the main research area is bodipy chemosensor sensitive selective detection mercury ion.

Detection of heavy metals with high sensitivity and selectivity is of vital importance. In this study, we report the synthesis of small mol. chemosensors and the fabrication of corresponding macromol. fluorescent chemosensors. Boron dipyrrole methane (BODIPY)-derived chemosensors, BE and BB, were designed and synthesized first. Then, they were incorporated into polymeric derivatives to prepare macromol. fluorescent chemosensors. The small mol. sensors were highly sensitive and selective to Hg2+. Other ions and albumin did not exhibit clear interference to the sensing of Hg2+ ions. Once the macromol. chemosensors were formed, the recognition ability was preserved; moreover, the sensitivity was even enhanced by the “”mol. wire”” mechanism. The min. detection limits of four macromol. chemosensors, PBEP, PBEB, PBBP and PBBB, for Hg2+ reached 2.05 μM, 0.23 μM, 4.23 μM, and 0.15 μM, resp. Under natural light, the addition of Hg2+ led to significant color changes; also, they can be used as Hg2+-sensitive “”naked eye”” indicators in the natural environment.

New Journal of Chemistry published new progress about Sensors. 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

Garcia-Urricelqui, Ane; de Cozar, Abel; Mielgo, Antonia; Palomo, Claudio published the artcile< Probing α-Amino Aldehydes as Weakly Acidic Pronucleophiles: Direct Access to Quaternary α-Amino Aldehydes by an Enantioselective Michael Addition Catalyzed by Bronsted Bases>, Category: esters-buliding-blocks, the main research area is aminoethanal nitroethene cinchona catalyst enantioselective diastereoselective Michael addition; amino nitrobutanal preparation; Brønsted bases; Michael addition; asymmetric catalysis; hydrogen bonds; quaternary stereocenters.

The chem. of α-amino aldehydes was expanded beyond their limits by documenting the first direct α-alkylation of α-branched α-amino aldehydes with nitroolefins. The reaction produced densely functionalized products bearing up to two, quaternary and tertiary, vicinal stereocenters with high diastereo- and enantioselectivity. DFT modeling lead to the proposal that intramol. hydrogen bonding between the NH group and the carbonyl oxygen atom in the starting α-amino aldehyde was key for reaction stereocontrol.

Chemistry – A European Journal published new progress about Alkenes, nitro Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Meares, Adam; Yu, Zhanqian; Viswanathan Bhagavathy, Ganga; Satraitis, Andrius; Ptaszek, Marcin published the artcile< Photoisomerization of enediynyl linker leads to slipped cofacial hydroporphyrin dyads with strong through-bond and through-space electronic interactions>, Computed Properties of 112-63-0, the main research area is cis trans photoisomerization porphyrin enediynyl conjugation.

Photoisomerization of 3,4-di(methoxycarbonyl)-enediyne linker in hydroporphyrin (chlorin or bacteriochlorin) dyads leads to thermally stable cis isomers, where macrocycles adopt a slipped cofacial mutual geometry with an edge-to-edge distance of ∼3.6 Å (determined by d. functional theory (DFT) calculations). Absorption spectra exhibit a significant splitting of the long-wavelength Qy band, which indicates a strong electronic coupling with a strength of V = ∼477 cm-1 that increases to 725 cm-1 upon metalation of hydroporphyrins. Each dyad features a broad, structureless emission band, with large Stokes shift, which is indicative of excimer formation. DFT calculations for dyads show both strong through-bond electronic coupling and through-space electronic interactions, due to the overlap of π-orbitals. Overall, geometry, electronic structure, strength of electronic interactions, and optical properties of reported dyads closely resemble those observed for photosynthetic special pairs. Dyads reported here represent a novel type of photoactive arrays with various modes of electronic interactions between chromophores. Combining through-bond and through-space coupling appears to be a viable strategy to engineer novel optical and photochem. properties in organic conjugated materials.

Journal of Organic Chemistry published new progress about Cis-trans photoisomerization. 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

Du, Kun-ze; Cui, Yan; Chen, Shujing; Yang, Rui; Shang, Ye; Wang, Chenhong; Yan, Yiqi; Li, Jin; Chang, Yan-xu published the artcile< An integration strategy combined progressive multivariate statistics with anticoagulant activity evaluation for screening anticoagulant quality markers in Chinese patent medicine>, Synthetic Route of 112-63-0, the main research area is Chinese patent medicine screening anticoagulant quality marker multivariate statistics; FXa inhibitory activity; Multivariate statistical analysis; Naoxintong capsules; Thrombin inhibitory activity.

The cardiovascular and cerebrovascular diseases affect human health globally. Naoxintong capsules (NXTs), a famous Chinese Patent Medicine, has been especially applied to treat cerebral infarction and coronary heart disease in clin. practice. The anticoagulant activity of this prescription plays an important role in this course of treatment. Thrombin and factor Xa (FXa) are two key targets considering the anticoagulant activity. The purpose of this investigation is to screen the quanlity markers as key thrombin and FXa inhibitors for the anticoagulant activity oriented quality control of Chinese patent medicine. Simple multi-polar solvent extraction processes using various proportions of solvents were conducted and their thrombin/FXa inhibitory activities were evaluated in vitro. Bivariate correlation anal. (BCA), gray correlation anal. (GCA), and orthogonal partial least squares discriminate anal. (OPLS-DA) were adopted for screening the potential active markers related to the anticoagulant activity. The chem. structures of these active compounds were identified by UHPLC-Q-TOF-MS/MS and their thrombin/FXa inhibitory activity was determined The mol. docking technol. was applied to explore the interaction between the compounds and targets. The contribution of these anticoagulant active ingredients in NXT was also investigated. Last but not the least, the contents of these markers in NXT were determined by liquid chromatog.-electrospray ionization tandem triple quadrupole mass spectrometry (HPLC-ESI-MS/MS) method. The results showed that the NXT extract exhibited great activity against thrombin and FXa, especially extracted by 75% methanol (volume/volume). Six marker compounds with potential anticoagulant activity were screened out. Therein, four of the active compounds owing thrombin inhibitory activity (paeoniflorin, lithospermic acid, salvianolic acid B, Z-ligustilide) and five of the active compounds owing FXa inhibitory activity (3,5-dicaffeoylquinic acid, rosmarinic acid, lithospermic acid, salvianolic acid B and Z-ligustilide). In addition, these active compounds accounted for a large proportion of thrombin/FXa inhibitory activity of NXTs. The binding energy also showed the strong interaction formed by close connection of the compounds to the residues of targets. The proposed integrated stategy could be an efficient strategy to screen potential thrombin/FXa inhibitors for the bioactivity related quanlity control of Chinese patent medicine.

Journal of Ethnopharmacology published new progress about Anticoagulants. 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

Ahmad, Moghis U.; Krishna, U. Murali; Ali, Shoukath M.; Choudhury, Sreeti; Ahmad, Imran published the artcile< Synthesis of 1,3- and 1,2-diphosphatidylglycerol>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is glycerol coupling glyceride phosphite catalyst pyridinium bromide phosphatidylglycerol synthesis; phosphatidylglycerol cardiolipin glycerophospholipid phosphocholine synthesis glycerol protecting group.

A novel phosphonium salt methodol. was utilized for the first time to synthesize 1,3-, and 1,2-diphosphatidylglycerol. Optically active 1,2-di-O-acyl-sn-glyceryl phosphate was coupled with unprotected glycerol in the presence of pyridinium tribromide and triethylamine to yield, after final removal of phosphate protecting group, the title compounds The 1,2-diphosphatidylglycerol (1,2-isomer of cardiolipin) may be a member of a new class of phospholipids for industrial applications similar to other phosphocholines.

Lipids published new progress about Cardiolipins Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), 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

Pandey, Ganash; Das, Parthasarathi; Reddy, P. Yella published the artcile< Photoinduced electron transfer (PET) promoted oxidative activation of 1-(N-benzyl-N-methylglycyl)-(S)-prolinol: development of novel strategies towards enantioselective syntheses of α-amino acids, their N-methyl derivatives and α-hydroxy acids employing (S)-prolinol as a recyclable chiral auxiliary>, COA of Formula: C19H34O2, the main research area is amino hydroxy acid preparation enantioselective cyclization photolysis alkylation hydrolysis; prolinol chiral auxiliary preparation amino hydroxy acid.

PET activation of 1-(N-benzyl-N-methylglycyl)-(S)-prolinol (I) in dry acetonitrile, utilizing 1,4-dicyanonaphthalene (DCN) as a light-harvesting electron-acceptor and Me viologen (MV++) as an electron-transfer mediator, leads to the formation of 3-[benzyl(methyl)amino]perhydropyrrolo-[2,1-c][1,4]oxazin-4-one (II). When this photolysis is carried out in aqueous acetonitrile, exclusively 3-hydroxy-perhydropyrrolo[2,1-c][1,4]oxazin-4-one (III) is produced. The formation of II can be rationalized in terms of intramol. cyclization of the in situ generated iminium cation intermediate (IV) by the OH moiety of (S)-prolinol, while III is generated by hydrolysis of IV followed by acetalization. Nucleophilic alkylation of II and III, using Grignard reagents and allyltrimethylsilane/TiCl4, provides amides in a highly stereoselective manner. Hydrolysis of the resultant amides provides α-amino acid derivatives and α-hydroxy acids, resp., in optically active form, along with the recovered (S)-prolinol chiral auxiliary in its recyclable form.

European Journal of Organic Chemistry published new progress about Alkylation. 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

Arimoto, Hirokazu; Shimano, Toshihisa; Uemura, Daisuke published the artcile< Concise Synthesis of the Plant Growth Regulator Theobroxide>, Electric Literature of 112-63-0, the main research area is theobroxide preparation dihydrotoluene plant growth regulator; lipase resolution theobroxide preparation.

A plant growth regulator, theobroxide (I), which produces potato tubers under noninduced long-day conditions, was synthesized in four steps from dihydrotoluene.

Journal of Agricultural and Food Chemistry published new progress about Enzymic resolution. 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

Zhang, Wenguo; Zou, Xiaobin; Liu, Xiaoli; Liang, Zhu; Ge, Zhen; Luo, Yunjun published the artcile< Preparation and properties of waterborne polyurethane modified by aminoethylaminopropyl polydimethylsiloxane for fluorine-free water repellents>, Category: esters-buliding-blocks, the main research area is aminoethylaminopropyl polydimethylsiloxane modified waterborne polyurethane preparation water repellency property.

Waterborne polyurethane (WPU) prepolymers were firstly synthesized by toluene diisocynate (TDI), trimethylolpropane (TMP), polydimethylsiloxane (PDMS), N-methyldiethanolamine (N-MDEA) and glycerin monostearate (GMS). Then the prepolymers were chain-extended by aminoethylaminopropyl polydimethylsiloxane (AEAPS) to obtain fluorine-free water repellents. In this paper, the structure of AEAPS-modified waterborne polyurethane (AEWPU) was characterized, and the influence of different AEAPS contents on stability, particle size and viscosity of AEWPU, the waterproof performance, surface energy, contact-angle hysteresis and morphol. of the AEWPU films. The application properties of the fabrics finished by AEWPU, the elements distribution of the film and the finished fabric were also discussed. The optimum AEAPS content of the water repellent was 20 wt%, then the highest score of 90+ was obtained.

Progress in Organic Coatings published new progress about Absorption (water). 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

Krueger, Bastian; Ruecker, Konstantin Kimon; Wittstock, Gunther published the artcile< Redox Mediators for Faster Lithium Peroxide Oxidation in a Lithium-Oxygen Cell: A Scanning Electrochemical Microscopy Study>, Electric Literature of 112-63-0, the main research area is lithium peroxide oxidation kinetics redox mediator lithium oxygen battery.

The reoxidation of Li2O2 as a discharge product of a Li-O2 cell occurs with high overpotential at the three-phase boundary between the electron conductor of the pos. gas-diffusion electrode, the organic electrolyte, and solid Li2O2. Indirect oxidation of Li2O2 by means of redox mediators is a way to overcome the high overpotential of this reaction, decrease the formation of reactive oxygen species, and convert the entire amount of Li2O2 formed during the discharge step. The rate constants of the redox reaction between oxidized mediators and solid Li2O2 were determined for five organic redox mediators in two glyme electrolytes and two electrolytes based on ionic liquids Specifically, (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO), 1,2,4,5-tetramethoxybenzene (TMB), 2,5-di-tert-butyl-1,4-dimethoxybenzene (DBDMB), 2,2′-bis(1,3-dithiolylidene) (TTF), and N-methylphenothiazine (MPT) were used in electrolytes based on 1-methoxy-2-(2-methoxyethoxy)ethane (diglyme) and 1-methoxy-2-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]ethane (tetraglyme) as well as in the ionic liquids 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIm]TFSI) and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([Py1,4]TFSI). The suitability of the method was carefully evaluated. The highest rate constant was found for DBDMB in diglyme. TTF showed the lowest rate constant in all tested electrolytes. The rate constants of all mediators in ionic liquids are at least 1 order of magnitude lower than in the ether-based electrolytes although the viscosity of [EMIm]TFSI is comparable to that of tetraglyme. This must be considered when devising Li-O2 cells with such nonvolatile electrolytes.

ACS Applied Energy Materials published new progress about Battery electrolytes. 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