Category: esters-buliding-blocks

Fernandes, Alessandra A. G.; Stivanin, Mateus L.; Jurberg, Igor D. published the artcile< RuCl3/ PPh3 - Catalyzed Direct Conversion of Isoxazol-5-ones to 2,3-Disubstituted Pyridines>, Category: esters-buliding-blocks, the main research area is isoxazolone acrolein ruthenium chloride triphenyl phosphine catalyst decarboxylative heterocyclization; pyridine preparation.

A novel catalytic system employing RuCl3/ PPh3 was described for the preparation of 2,3-disubstituted pyridines starting from 3,4-disubstituted isoxazol-5-ones and acrolein. Mechanistic studies involving 31P NMR, HRMS analyses and control experiments were performed in order to supported key events and intermediates proposed for this transformation.

ChemistrySelect published new progress about Benzaldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Category: esters-buliding-blocks.

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

Portnova, Svetlana V.; Kuzmina, Natalia S.; Yamshchikova, Yulia F.; Krasnykh, Eugene L. published the artcile< Density and Viscosity of Glycolic, Lactic, and Malic Acid Esters>, Quality Control of 623-50-7 , the main research area is density kinematic viscosity aliphatic ester glycolic lactic malic acid.

Densities and viscosities were measured as a function of temperature for 12 esters of glycolic, DL-lactic, and DL-malic acids and linear chain alcs. C1-C5. The d. and kinematic viscosity were obtained using a pycnometer and a Pinkevitch capillary viscometer in a temperature range of 293.15-363.15 K with accuracies of 0.1 and 0.35%, resp. The obtained data were used for dynamic viscosity calculation It was demonstrated that the viscosity-temperature dependence of esters was described by the ASTM D341 model with an average absolute relative deviation of 1%. The temperature dependence of dynamic viscosity was fitted using the Arrhenius-like equation and Vogel-Fulcher-Tammann (VFT) model. It was found that the adjustable parameters A and B have the similar value for compounds in one homologous series. These parameters were taken as constant for each series of esters of the corresponding acids. The dynamic viscosity-temperature dependence of esters was better described by the VFT model than the Arrhenius-like equation. The capabilities of some group-additivity methods for predicting d. have been reviewed and compared with exptl. results.

Journal of Chemical & Engineering Data published new progress about Aliphatic diesters Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), SPN (Synthetic Preparation), PROC (Process), PREP (Preparation). 623-50-7 belongs to class esters-buliding-blocks, and the molecular formula is C4H8O3, Quality Control of 623-50-7 .

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

Eissa, Ahmed M.; Abdulkarim, Ali; Sharples, Gary J.; Cameron, Neil R. published the artcile< Glycosylated Nanoparticles as Efficient Antimicrobial Delivery Agents>, Category: esters-buliding-blocks, the main research area is nanoparticle antibiotic glycosylation polybutyl acrylate.

Synthetic polymer nanoparticles that can be tailored through multivalent ligand display on the surface, while at the same time allowing encapsulation of desired bioactive mols., are especially useful in providing a versatile and robust platform in the design of specific delivery vehicles for various purposes. Glycosylated nanoparticles (glyco-NPs) of a poly(Bu acrylate) (pBA) core and poly(N-2-(β-D-glucosyloxy)ethyl acrylamide) (p(NβGlcEAM)) or poly(N-2-(β-D-galactosyloxy)ethyl acrylamide) (p(NβGalEAM)) corona were prepared via nanopptn. in aqueous solutions of preformed amphiphilic glycopolymers. Well-defined block copolymers of poly(pentafluorophenyl acrylate) (pPFPA) and pBA were first prepared by RAFT polymerization followed by postpolymn. functionalization with aminoethyl glycosides to yield p(NβGlcEAM-b-BA) and p(NβGalEAM-b-BA), which were then used to form glyco-NPs (glucosylated and galactosylated NPs, Glc-NPs and Gal-NPs, resp.). The glyco-NPs were characterized by dynamic light scattering (DLS) and TEM. Encapsulation and release of ampicillin, leading to nanoparticles that we have termed “”glyconanobiotics””, were studied. The ampicillin-loaded glyco-NPs were found to induce aggregation of Staphylococcus aureus and Escherichia coli and resulted in antibacterial activity approaching that of ampicillin itself. This glyconanobiotics strategy represents a potential new approach for the delivery of antibiotics close to the surface of bacteria by promoting bacterial aggregation. Defined release in the proximity of the bacterial envelope may thus enhance antibacterial efficiency and potentially reduce the quantities of agent required for potency.

Biomacromolecules published new progress about Antibacterial agents. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Category: esters-buliding-blocks.

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

Tagat, Jayaram R.; McCombie, Stuart W.; Nazareno, Dennis; Labroli, Marc A.; Xiao, Yushi; Steensma, Ruo W.; Strizki, Julie M.; Baroudy, Bahige M.; Cox, Kathleen; Lachowicz, Jean; Varty, Geoffrey; Watkins, Robert published the artcile< Piperazine-Based CCR5 Antagonists as HIV-1 Inhibitors. IV. Discovery of 1-[(4,6-Dimethyl-5-pyrimidinyl)carbonyl]- 4-[4-{2-methoxy-1(R)-4-(trifluoromethyl)phenyl}ethyl-3(S)-methyl-1-piperazinyl]- 4-methylpiperidine (Sch-417690/Sch-D), a Potent, Highly Selective, and Orally Bioavailable CCR5 Antagonist>, Computed Properties of 112-63-0, the main research area is CCR5 antagonist antiaids AIDS HIV1.

The nature and the size of the benzylic substituent are shown to be the key to controlling receptor selectivity (CCR5 vs. M1, M2) and potency in the title compounds Optimization of the lead benzylic Me compound 3 led to the methoxymethyl analog 30, which had excellent receptor selectivity and oral bioavailability in rats and monkeys. Compound 30 (Sch-417690/Sch-D), a potent inhibitor of HIV-1 entry into target cells, is currently in clin. trials.

Journal of Medicinal Chemistry published new progress about AIDS (disease). 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

Chen, Huan; Zeng, Guanghong; Wang, Zhiqiang; Zhang, Xi published the artcile< To Construct ""Ion Traps"" for Enhancing the Permselectivity and Permeability of Polyelectrolyte Multilayer Films>, Reference of 112-63-0, the main research area is ion trap permselectivity permeability polyelectrolyte multilayer film.

We introduced single-charged mols. into layer-by-layer film of polymers by mixing polyelectrolyte and single-charged mols. with an appropriate ratio to form polymer complex and then deposition in alternation with counter-polyelectrolyte. By immersing the layer-by-layer film into aqueous solution of electrolytes, the single-charged mols. could be released from the layer-by-layer film. An interesting finding is the releasing of the single-charged mols. gave the multilayer film the permselectivity. For example, cations would be trapped and anions be repelled if pos.-charged mols. were used. Multilayer films able to trap either cations or anions could be fabricated, depending on the nature of single-charged template mols. used. Thus, the ion permselectivity of multilayer film was enhanced. Moreover, the permeability of the film was also dramatically increased, suggesting the potential application of layer-by-layer films as highly efficient ion-permselective membranes.

Macromolecules published new progress about Fluorescence. 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

Bellucci, Christina; Gualtieri, Fulvio; Chiarini, Alberto published the artcile< Negative inotropic activity of para-substituted diethyl benzylphosphonates related to fostedil. Part 3>, Related Products of 112-63-0, the main research area is benzylphosphonate diethyl preparation neg inotropic; calcium channel blocker benzylphosphonate derivative; MSBAR antihypertensive benzylphosphonate derivative; fostedil analog neg inotropic.

Di-Et benzylphosphonates 4-RC6H4CH2P(O)(OEt)2 (R = H, Me, NO2, Br, F, NH2, SO2Me, etc.), related to the calcium antagonist di-Et 4-(2-benzothiazolyl)benzylphosphonate (fostedil), produce a dose-dependent neg. inotropic effect on left atrial muscle isolated from guinea pig heart. Some of the compounds are equipotent or slightly more potent than fostedil and diltiazem taken as reference drugs. Structure-activity relationships are discussed.

European Journal of Medicinal Chemistry published new progress about Antihypertensives. 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

Molnar, Istvan Gabor; Gilmour, Ryan published the artcile< Catalytic Difluorination of Olefins>, Reference of 112-63-0, the main research area is vicinal difluorination olefin iodotoluene catalyst.

Mol. editing with fluorine is a validated strategy for modulating the structure and function of organic systems. In the current arsenal of catalytic dihalogenation technologies, the direct generation of the vicinal difluoride moiety from simple olefins without a prefunctionalization step remains conspicuously absent. Herein we report a catalytic, vicinal difluorination of olefins displaying broad functional group tolerance, using inexpensive p-iodotoluene as the catalyst. Preliminary efforts toward the development of an enantioselective variant are also disclosed.

Journal of the American Chemical Society 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, Reference of 112-63-0.

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

Bracchi, Michael E.; Dura, Gema; Fulton, David A. published the artcile< The Synthesis of poly(arylthiols) and their Utilization in the preparation of cross-linked dynamic covalent polymer nanoparticles and hydrogels>, Related Products of 71195-85-2, the main research area is polyarylthiol crosslinked dynamic covalent polymer nanoparticle hydrogel self assembly.

Dynamic covalent bonds can be utilized to endow polymer-based structures, such as nanoparticles or hydrogel networks, with the abilities to adapt their structures or compositions in response to an external stimuli. In this work we investigate the potential of aromatic thiols, which because they exhibit vastly different reactivities, pKa’s and nucleophilicities in comparison to aliphatic thiols, present an alternative reversible thiol/disulfide system for utilization within polymer-based structures. We demonstrate that water-soluble arylthiol pendant-functional random copolymers capable of forming dynamic disulfide bonds can be prepared and show how they can be cross-linked into polymeric nanoparticles and hydrogel networks through the formation of disulfide cross-links which can then be cleaved to reafford the initial aromatic thiol-functionalized polymers. We highlight how careful control of reaction conditions is required to drive the self-assembly of these polymers into nanoparticles in a process which is predominately under kinetic control. The potential of these arylthiol appended polymers to be utilized within a more complex orthogonal dynamic covalent polymer system also featuring polymer chains cross-linked through reversible imine bond formation was also investigated. This work expands the utility of aromatic disulfides in dynamic polymer systems and will broaden the range and versatility of dynamic covalent disulfide-based materials available to researchers in the fields of nanochem. and functional materials.

Polymer Chemistry published new progress about Crosslinking. 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Related Products of 71195-85-2.

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

Zhang, Xiaoyuan; Sarathy, S. Mani published the artcile< High-Temperature Pyrolysis and Combustion of C5-C19 Fatty Acid Methyl Esters (FAMEs): A Lumped Kinetic Modeling Study>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is pyrolysis combustion fatty acid methyl ester lumped kinetic model.

In the effort to mitigate the depletion of fossil fuels and climate change, biodiesels are considered to be one of the most suitable substitutes for petro-diesel in compression ignition engine applications. As a follow up to prior modeling studies for gasoline and jet surrogate fuel components (Zhang, X.; Mani Sarathy, S. Fuel, 2021, 286, 119361), this work proposes a lumped kinetic model for both saturated and unsaturated C5-C19 fatty acid Me esters (FAMEs) based on the same methodol. The present lumped model includes 52 FAME fuel components, covering a wide range of biodiesel surrogate fuel components, as well as components typically found in biodiesels. This methodol. decouples the combustion of FAME fuels into two stages: the pyrolysis of fuel mols. and the oxidation of pyrolysis intermediates. Lumped reaction steps are used to describe the (oxidative) pyrolysis of each fuel mol., while a detailed model (Aramcomech 2.0) is adopted as the base mechanism to describe the subsequent conversion of these key intermediates. Rate rules adopted for all the FAME fuels are consistent. The present lumped model is validated against exptl. data from 20 pure FAMEs and six diesel/biodiesel surrogates, including around 130 sets of validation data. In general, the present lumped model satisfactorily captures most of these validation targets. This lumped model performs comparably with the detailed models developed in the literature under combustion conditions. Combined with the lumped model for 50 hydrocarbon fuels developed in previous work by this group, the lumped kinetic model for FAME fuels developed here can be used to predict the pyrolysis and combustion chem. of diesel/biodiesel surrogates in CFD simulations after necessary model reduction for the base model. Also, the stoichiometric parameters of the lumped reactions for various pure FAMEs can be used as the database for data science study in FGMech development for real biodiesels.

Energy & Fuels published new progress about Biodiesel fuel. 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

Nuriye, Ahmed Y.; Barr, Joseph published the artcile< Iodine-promoted oxidative homocoupling of methyl 2-arylacetates under equilibrium conditions using potassium tert-butoxide as a base>, Computed Properties of 30095-98-8, the main research area is phenylacetate iodine potassium tert butoxide promoter diastereoselective oxidative homocoupling; diphenylsuccinate preparation.

Iodine-promoted dimerization of enolates of Me 2-phenylacetates generated with t-BuOK under equilibrium conditions were reported. The oxidative homocoupling reaction furnished a mixture of dl and meso dimers in moderate to good yields and diastereoselectivity. Electron-withdrawing substituents on the Ph ring seem to facilitate dimerization leading to higher yields and ortho-substituted Ph acetates afford better diastereoselectivity.

Results in Chemistry published new progress about Aromatic esters Role: RCT (Reactant), RACT (Reactant or Reagent). 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Computed Properties of 30095-98-8.

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