Category: ethers-buliding-blocks

Jayaraman, Arumugam published the artcilePractical and scalable synthesis of borylated heterocycles using bench-stable precursors of metal-free lewis pair catalysts, Formula: C11H17BO3S, the publication is Organic Process Research & Development (2018), 22(11), 1489-1499, database is CAplus.

Five-membered heterocycles undergo borylation and hydroboration with HBpin boronate in a green scalable process under catalysis with o-phenylene borate-amine frustrated Lewis pairs, yielding substituted boronic esters. A practical and scalable metal-free catalytic method for the borylation and borylative dearomatization (hydroboration) of pyrroles and indoles has been developed. This synthetic method uses inexpensive and conveniently synthesizable bench-stable precatalysts of the form 1-NHR₂-2-BF₃-C₆H₄, com. and synthetically accessible heteroarenes as substrates, and pinacolborane as the borylation reagent. The preparation of several borylated heterocycles on 2 and 50 g scales was achieved under solvent-free conditions without the use of Schlenk techniques or a glovebox. A kilogram-scale borylation of one of the heteroarene substrates was also achieved using this cost-effective green methodol. to exemplify the fact that our methodol. can be conveniently implemented in fine chem. industries.

Organic Process Research & Development published new progress about 596819-12-4. 596819-12-4 belongs to ethers-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Ether,Boronate Esters,Boronic acid and ester, name is 2-(5-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C11H17BO3S, Formula: C11H17BO3S.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Palav, Amey published the artcileNCBSI/KI: A Reagent System for Iodination of Aromatics through In Situ Generation of I-Cl, Application In Synthesis of 93-04-9, the publication is Journal of Organic Chemistry (2021), 86(17), 12467-12474, database is CAplus and MEDLINE.

In-situ iodine monochloride (I-Cl) generation followed by iodination of aromatics using NCBSI/KI system was developed. The NCBSI reagent required no activation due to longer bond length, lower bond dissociation energy, and higher absolute charge d. on nitrogen. The system was adequate for mono- and diiodination of a wide range of moderate to highly activated arenes with good yield and purity. Moreover, the precursor N-(benzenesulfonyl)benzenesulfonamide was recovered and transformed to NCBSI and made the protocol eco-friendly and cost-effective.

Journal of Organic Chemistry published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C11H10O, Application In Synthesis of 93-04-9.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Subagyono, Rr dirgarini j. n. published the artcilePyrolysis of fast growing wood Macaranga gigantea: Product characterisation and kinetic study, Formula: C9H10O4, the publication is Fuel (2022), 123182, database is CAplus.

Fast-growing wood Macaranga gigantea has been pyrolyzed and its pyrolysis products have been characterized and their formation kinetics studied. Pyrolysis of M. gigantea wood was carried out by varying the temperature and time of pyrolysis to determine the effect of these two parameters on product yields and product characteristics. In general, an increase in pyrolysis temperature and time increased the yield of liquid and gas products, the concentration of cellulose, hemicellulose and lignin-derived compounds, but decreased the biochar yield. The organic phase liquid pyrolysis products mainly contained phenolic compounds and their derivatives, eugenols, furans, aldehydes and ketones. Fourier-transform IR spectroscopy and pyrolysis-gas chromatog.-mass spectrometry analyses of biochar showed that thermal decomposition of M. gigantea required temperatures higher than 300°C to optimize thermal decomposition and carbonization of lignin, cellulose and hemicellulose. The concentration of phenols and benzenediols in biochar decreased with an increase in pyrolysis temperature M. gigantea pyrolysis kinetics studies showed that wood pyrolysis occurred through four main stages with activation energy (Eα) values, based on calculations by the Friedman and Kissinger-Akahira-Sunose methods, of 28.1-99.0 kJ/mol and 35.6-104.9 kJ/mol, resp. The spectra produced by thermogravimetric analyzer coupled with a Fourier-transform IR spectroscopy showed that H₂O and CO₂ were produced during pyrolysis and the volatile compounds produced were predominantly phenolic compounds, in accord with characterization results of the liquid products by gas chromatog.-mass spectrometry and NMR spectroscopy.

Fuel published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C8H11NO, Formula: C9H10O4.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Shimizu, Ken-ichi published the artcileSilica-Supported Silver Nanoparticles with Surface Oxygen Species as a Reusable Catalyst for Alkylation of Arenes, COA of Formula: C10H14O, the publication is ChemCatChem (2010), 2(1), 84-91, database is CAplus.

A series of silica-supported silver catalysts with various Ag loading (3-30 wt %) and different treatment (oxidation and subsequent reduction by H₂) were prepared, and their local structures were characterized by extended x-ray absorption fine structure (EXAFS) anal. In oxidized catalysts, silver were mainly present as small nanoparticles with surface oxygen atoms, and the number of surface oxygen atoms decreased with increased silver loading. The H₂ reduction of these samples resulted in a removal of the surface oxygen atoms. The structure-activity relationship was studied for the alkylation of anisole with benzyl alc. and styrene. Ag^I oxide, Ag^I ion, bulk silver metal, and silica-supported silver nanoparticles were non-active species. In contrast, silica-supported silver nanoparticles with the surface oxygen atoms acted as an effective heterogeneous catalyst for the alkylation of arenes with alcs. and styrenes. Kinetic studies in alkylation of anisole with alcs. showed that the cleavage of the α-C-H bond of alc. was the rate-limiting step. It is proposed that the surface oxygen adjacent to the silver surface atoms plays an important role in the dissociation of the α-C-H bond.

ChemCatChem published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C9H9NO6S, COA of Formula: C10H14O.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Li, Ruyu published the artcileSynthesis and properties of poly(p-phenylene vinylene) derivatives with hyperbranched structure and containing a nitro substituent, COA of Formula: C15H24O2, the publication is Monatshefte fuer Chemie (2014), 145(1), 85-90, database is CAplus and MEDLINE.

In order to improve efficiency, processability, and stability, two groups of novel poly(p-phenylene vinylene) (PPV) derivatives (P₁-P₃ and P₄-P₆) with hyperbranched structure and containing a nitro substituent were synthesized via a Gilch reaction in different monomer ratios. The properties of the polymers were investigated by using UV-Vis absorption, fluorescence spectroscopy, cyclic voltammetry, and thermogravimetric anal. The result shows that the band gaps of the PPV derivatives with a nitro substituent were decreased and the polymers had higher mol. weights (10⁶), excellent solubility in common organic solvents, good film-forming ability, and better thermal stability. The polymers can be used as an efficient acceptor material in polymeric solar cells.

Monatshefte fuer Chemie published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C15H24O2, COA of Formula: C15H24O2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Marstokk, K.-M. published the artcileStructural and conformational properties of methoxyacetamide as studied by microwave spectroscopy and ab initio computations, Recommanded Product: 2-Methoxyacetamide, the publication is Acta Chemica Scandinavica (1996), 50(9), 845-847, database is CAplus.

Ab initio (6-311+G^** level) structure, rotational constants, dipole moments and energy differences of the three rotomers of methoxyacetamide found to be min. on the potential energy surface.

Acta Chemica Scandinavica published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Recommanded Product: 2-Methoxyacetamide.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Merey, Hanan A. published the artcileSimultaneous determination of pramocaine HCl and hydrocortisone acetate in pharmaceutical dosage form, Category: ethers-buliding-blocks, the publication is Journal of Liquid Chromatography & Related Technologies (2013), 36(19), 2774-2784, database is CAplus.

Two sensitive and selective methods were developed and validated for simultaneous determination of pramocaine HCl and hydrocortisone acetate in pharmaceutical dosage form. The first method is a spectrodensitometric method where pramocaine HCl and hydrocortisone acetate were separated using toluene:methanol:chloroform: 10% NH₃ [(5:3:6:0.1, by volume) as the developing system followed by densitometric measurement at 290 nm] and 250 nm for pramocaine HCl and hydrocortisone acetate, resp. The second method is a high performance liquid chromatog. method for separation and determination of both drugs using reversed phase C₁₈ column and mobile phase consisting of distilled water:acetonitrile:triethylamine (530:470:0.1, by volume); pH was adjusted to 3 by o-phosphoric acid. The proposed methods were successfully applied for the anal. of pramocaine HCl and hydrocortisone acetate in laboratory prepared mixtures and in pharmaceutical dosage form and the results obtained were assessed by applying the standard addition technique. Statistical comparison between the results obtained by applying the proposed methods and official method for the cited drugs was done and no significant difference was found at p = 0.05.

Journal of Liquid Chromatography & Related Technologies published new progress about 637-58-1. 637-58-1 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is 4-(3-(4-Butoxyphenoxy)propyl)morpholine hydrochloride, and the molecular formula is C17H28ClNO3, Category: ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Kitaura, Hirokazu published the artcileAn ultrafast process for the fabrication of a Li metal-inorganic solid electrolyte interface, Application of 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium metal inorganic solid electrolyte fabrication ultrafast.

A lithium anode is expected to be applied to next-generation batteries using inorganic solid electrolytes (ISEs). When joining Li with ISEs, interfacial reactions often cause performance degradation and have been avoided. In this report, we demonstrate a new strategy for the ultrafast formation of a good interface between Li and ISEs, using a reactive process (ultrasonic-assisted fusion welding method). We found that ultrasonic irradiation helps in suitable interface formation between molten Li and ISEs, and the joining process finishes in just a few seconds. The obtained interface showed a low resistance and could be used under a high c.d. of 0.5 mA cm-2. The development of prototype cells for next-generation batteries was promoted by this ultrafast process.

Energy & Environmental Science published new progress about Batteries. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Application of 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kucuk, Asuman Celik published the artcileInfluence of LiBOB as an electrolyte additive on the performance of BiF3/C for fluoride shuttle batteries, HPLC of Formula: 143-24-8, the main research area is bismuth fluoride carbon film battery electrolyte ionic conductivity.

The potential effects of using lithium bis(oxalato)borate (LiBOB) as an electrolyte additive on the redox reactions of the pos. bismuth fluoride (BiF3) electrode were investigated in tetraglyme (G4) containing the anion acceptor (AA) triphenylboroxin (TPhBX). The electrolyte system, containing 0.06 M LiBOB, 0.5 M TPhBX, and saturated cesium fluoride (CsF) was prepared The study also included a comparison with previously studied systems based on G4, which did not contain LiBOB but AA. The tolerances to reduction and oxidation were enhanced after introducing LiBOB to the system. The capacity of BiF3 improved at C/10 rate. Defluorination of BiF3 was demonstrated to proceed through a direct desorption-insertion mechanism, whereas the contribution of the dissolution-deposition mechanism was known to be predominant in the G4-based systems. Addition of only 1 weight/weight% LiBOB to the G4 system resulted in an interesting change in the mechanism and an improvement in the capacity at high C rate. This improvement was associated with the increasing electrochem. stability of the electrolyte due to the interaction between BOB- and Cs+, reducing the possibilities of electrolyte degradation and loss of active material owing to a direct desorption-insertion mechanism.

Journal of the Electrochemical Society published new progress about Batteries. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, HPLC of Formula: 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Cao, Deqing published the artcileOxidative decomposition mechanisms of lithium carbonate on carbon substrates in lithium battery chemistries, SDS of cas: 143-24-8, the main research area is oxidative decomposition lithium carbonate carbon battery.

Lithium carbonate plays a critical role in both lithium-carbon dioxide and lithium-air batteries as the main discharge product and a product of side reactions, resp. Understanding the decomposition of lithium carbonate during electrochem. oxidation (during battery charging) is key for improving both chemistries, but the decomposition mechanisms and the role of the carbon substrate remain under debate. Here, we use an in-situ differential electrochem. mass spectrometry-gas chromatog. coupling system to quantify the gas evolution during the electrochem. oxidation of lithium carbonate on carbon substrates. Our results show that lithium carbonate decomposes to carbon dioxide and singlet oxygen mainly via an electrochem. process instead of via a chem. process in an electrolyte of lithium bis(trifluoromethanesulfonyl)imide in tetraglyme. Singlet oxygen attacks the carbon substrate and electrolyte to form both carbon dioxide and carbon monoxide-approx. 20% of the net gas evolved originates from these side reactions. Addnl., we show that cobalt(II,III) oxide, a typical oxygen evolution catalyst, stabilizes the precursor of singlet oxygen, thus inhibiting the formation of singlet oxygen and consequent side reactions.

Nature Communications published new progress about Catalysts. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, SDS of cas: 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem