Month: October 2022

On January 31, 2022, Kiliclar, Huseyin Cem; Gencosman, Emirhan; Yagci, Yusuf published an article.Formula: C8H10O2 The title of the article was Visible light induced conventional step-growth and chain-growth condensation polymerizations by electrophilic aromatic substitution. And the article contained the following:

A novel visible light induced step-growth polymerization by electrophilic aromatic substitution between photochem. generated carbocations and dimethoxybenzene nucleophile is described. Conventional step-growth polymerization and chain-growth condensation polymerization (CCP) mechanisms are presented. It is found that by changing the molar ratios of the monomers slightly, the CCP mechanism becomes operative and relatively higher mol. weight polymers are obtained because of the higher reactivity of the end groups of the intermediates and oligomers than that of the monomers. The possibility of grafting onto polymers containing epoxide at their side chains by photoinduced chain end activation of poly(dimethoxyphenylene methylene) is demonstrated. This study is expected to promote potential applications of the combination of photoinduced electron transfer reactions and CCP in macromol. synthesis and material science. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Formula: C8H10O2

The Article related to visible light step chain growth condensation polymerization electrophilic aromatic, dimethoxybenzene, chain-growth condensation polymerization, electrophilic aromatic substitution, photopolymerization, polyphenylenemethylene, step-growth polymerization and other aspects.Formula: C8H10O2

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

On July 19, 2021, Xin, Hai-Long; Rao, Xiaofeng; Ishitani, Haruro; Kobayashi, Shu published an article.HPLC of Formula: 321-28-8 The title of the article was Sequential Continuous-Flow Synthesis of 3-Aryl Benzofuranones. And the article contained the following:

A sequential continuous-flow system to produce 3-aryl benzofuranones was developed. Starting from 2,4-di-tert-butylphenol and glyoxylic acid monohydrate, both the initial cyclocondensation and the subsequent Friedel-Crafts alkylation were catalyzed by the same heterogeneous catalyst, Amberlyst-15H. The catalyst has a promising life-time for these two steps, and it was able to be recovered and reused for several runs without deactivation. By using the established flow system, 5,7-di-tert-butyl-3-(3,4-dimethylphenyl)-3H-benzofuran-2-one (Irganox HP-136), which is a com. antioxidant, was prepared in 88% two-step yield. Reactions with various aromatic compounds proceeded well under flow conditions to afford 3-aryl benzo-furanone derivatives in high yields with good functional group compatibility. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).HPLC of Formula: 321-28-8

The Article related to tert butylphenol glyoxylic acid cyclocondensation friedel crafts amberlyst, hydroxy benzofuranone arene sequential continuous flow, aryl benzofuranone preparation, 3-aryl benzofuranones, amberlyst-15h, continuous-flow, heterogeneous catalyst, irganox hp-136 and other aspects.HPLC of Formula: 321-28-8

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

On February 17, 1999, Jin, Sung-Ho; Kim, Woo-Hong; Son, Byung-Hee; Song, In-Sung; Han, Eun-Mi published a patent.Electric Literature of 146370-51-6 The title of the patent was Organic electroluminescent polymer for light-emitting diode and devices therefrom. And the patent contained the following:

A light-emitting polymer for an electroluminescent display comprises a polymer having a dialkylphenylene moiety and a carbazole moiety I, where R1-R3 are independently C2-13 aliphatic alkyl or C5-16 branched alkyl; p = 5-100; and/or a polymer having an oxadiazole moiety and a poly(p-phenylenevinylene) moiety, and optionally a conventional polymer and a lower-mol. fluorescent dye. The polymer is applied to a light-emitting layer of a light-emitting diode having a cathode/light-emitting layer/anode structure, a cathode/buffer layer/light-emitting layer/anode structure, or a cathode/hole-transporting layer/light-emitting layer/electron-transporting layer/anode structure. Thus, a 2,5-bis(p-bromophenyl)-1,3,4-oxadiazole-1-methoxy-4-(2-ethylhexyloxy)-2,5-phenylboronic acid copolymer (monomer preparations given) was prepared, which was soluble in an organic solvent and showed excellent electron transport properties. The experimental process involved the reaction of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene(cas: 146370-51-6).Electric Literature of 146370-51-6

The Article related to electroluminescent polymer preparation light emitting diode, carbazole dialkylphenylene polymer light emitting diode, oxadiazole phenylenevinylene polymer light emitting diode, bromophenyloxadiazole phenylboronic acid copolymer preparation electroluminescent and other aspects.Electric Literature of 146370-51-6

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

Gong, Xinxing; Chen, Mo; Yao, Liangqing; Wu, Jie published an article in 2016, the title of the article was Facile Assembly of Benzo[b]naphtho[2,3-d]azocin-6(5 H)-ones by a Palladium-Catalyzed Double Carbometalation.Electric Literature of 157869-15-3 And the article contains the following content:

The palladium-catalyzed reaction of 2-alkynylanilines with 2-(2-bromobenzylidene)cyclobutanone as an efficient route to 7,8-dihydrobenzo[b]naphtho[2,3-d]azocin-6(5 H)-ones was developed. The fused eight-membered ring was constructed conveniently. During the reaction process, double carbometalation was involved, which resulted in excellent selectivity with the formation of three new bonds. This transformation is highly efficient and leads to fused polycycles in good to excellent yields with good functional group tolerance. The experimental process involved the reaction of 2-((4-Methoxyphenyl)ethynyl)aniline(cas: 157869-15-3).Electric Literature of 157869-15-3

The Article related to benzonaphthoazocinone preparation palladium catalyzed double carbometalation, fused eight membered polycycle preparation alkynylaniline bromobenzylidene cyclobutanone reaction, domino reactions, fused-ring systems, nitrogen heterocycles, palladium, polycycles and other aspects.Electric Literature of 157869-15-3

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

On September 6, 2021, Kang, Qi-Kai; Lin, Yunzhi; Li, Yuntong; Xu, Lun; Li, Ke; Shi, Hang published an article.Application of 321-28-8 The title of the article was Catalytic SNAr Hydroxylation and Alkoxylation of Aryl Fluorides. And the article contained the following:

A reliable method for accessing phenols ArOH (Ar = C6H5, 4-CH3OC6H4, 9H-fluoren-2-yl, etc.) and Ph alkyl ethers Ar1OR (Ar1 = 4-CH3C6H4, 9H-fluoren-2-yl, 1-methyl-2-oxo-2,3-dihydro-1H-indol-5-yl, etc.; R = Me, cyclohexylmethyl, oxan-4-yl, etc.) via catalytic SnAr reactions has been described. The method is applicable to a broad array of electron-rich and neutral aryl fluorides ArF and Ar1F, which are inert under classical SnAr conditions. Although the mechanism of SNAr reactions involving metal arene complexes is hypothesized to involve a stepwise pathway (addition followed by elimination), exptl. data that support this hypothesis is still under exploration. Mechanistic studies and DFT calculations suggest either a stepwise or stepwise-like energy profile. Notably, a rhodium η5-cyclohexadienyl complex intermediate with an sp3-hybridized carbon bearing both a nucleophile and a leaving group was isolated. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Application of 321-28-8

The Article related to phenol preparation dft mechanistic study, water aryl fluoride hydroxylation rhodium catalyst, ester preparation dft mechanistic study, aryl fluoride alc alkoxylation rhodium catalyst, c−o bond formation, meisenheimer-type intermediate, rhodium, η6-coordination and other aspects.Application of 321-28-8

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

On September 6, 2021, Kang, Qi-Kai; Lin, Yunzhi; Li, Yuntong; Xu, Lun; Li, Ke; Shi, Hang published an article.Quality Control of 2-Methylanisole The title of the article was Catalytic SNAr Hydroxylation and Alkoxylation of Aryl Fluorides. And the article contained the following:

A reliable method for accessing phenols ArOH (Ar = C6H5, 4-CH3OC6H4, 9H-fluoren-2-yl, etc.) and Ph alkyl ethers Ar1OR (Ar1 = 4-CH3C6H4, 9H-fluoren-2-yl, 1-methyl-2-oxo-2,3-dihydro-1H-indol-5-yl, etc.; R = Me, cyclohexylmethyl, oxan-4-yl, etc.) via catalytic SnAr reactions has been described. The method is applicable to a broad array of electron-rich and neutral aryl fluorides ArF and Ar1F, which are inert under classical SnAr conditions. Although the mechanism of SNAr reactions involving metal arene complexes is hypothesized to involve a stepwise pathway (addition followed by elimination), exptl. data that support this hypothesis is still under exploration. Mechanistic studies and DFT calculations suggest either a stepwise or stepwise-like energy profile. Notably, a rhodium η5-cyclohexadienyl complex intermediate with an sp3-hybridized carbon bearing both a nucleophile and a leaving group was isolated. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).Quality Control of 2-Methylanisole

The Article related to phenol preparation dft mechanistic study, water aryl fluoride hydroxylation rhodium catalyst, ester preparation dft mechanistic study, aryl fluoride alc alkoxylation rhodium catalyst, c−o bond formation, meisenheimer-type intermediate, rhodium, η6-coordination and other aspects.Quality Control of 2-Methylanisole

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

On August 17, 2007, Arvela, Riina K.; Pasquini, Serena; Larhed, Mats published an article.Electric Literature of 929-37-3 The title of the article was Highly Regioselective Internal Heck Arylation of Hydroxyalkyl Vinyl Ethers by Aryl Halides in Water. And the article contained the following:

Highly regioselective and fast Pd(0)-catalyzed internal α-arylation of ethylene glycol vinyl ether with aryl halides was shown to be possible in water without the need for any halide scavengers or ionic liquid additives. This presents the first case of water being utilized in the selective arylation of electron-rich olefins. Resulting α-products, e.g. I, were hydrolyzed and isolated as corresponding acetophenones, e.g. II, in good to excellent yields when using aryl bromides and with good to moderate yields in the case of aryl iodides. Microwave irradiation was shown to be beneficial in activation of aryl chlorides toward the internal Heck arylation. The scope of the protocol was further increased to include different hydroxyalkyl vinyl ethers, these all giving selectively only branched α-products. The active role of the hydroxy group in directing the regioselectivity toward internal arylation of electron-rich olefins, even in nonpolar toluene, was revealed. The experimental process involved the reaction of 2-(2-(Vinyloxy)ethoxy)ethanol(cas: 929-37-3).Electric Literature of 929-37-3

The Article related to acetophenone preparation green chem, hydroxyalkyl vinyl ether aryl bromide iodide chloride heck arylation, regioselective internal heck arylation palladium catalysis microwave irradiation, hydroxy neighboring group effect regioselective internal heck arylation and other aspects.Electric Literature of 929-37-3

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

On July 21, 2020, Zheng, Wenxiao; Zhu, Liuyi; Liang, Sheng; Ye, Jinshao; Yang, Xin; Lei, Zhenchao; Yan, Zhang; Li, Yongdong; Wei, Chaohai; Feng, Chunhua published an article.Formula: C8H10O2 The title of the article was Discovering the Importance of ClO• in a Coupled Electrochemical System for the Simultaneous Removal of Carbon and Nitrogen from Secondary Coking Wastewater Effluent. And the article contained the following:

inorganic pollutants in actual wastewater, e.g., halides and CO32-/HCO3-, may have neg. effects on electrochem. system performance due to their capability of quenching HO-. however, the authors determined the presence of Cl- and HCO3- in an electrochem. system was conducive to ClO- formation, which played an important role in promoting simultaneous removal of bio-refractory organics and N from secondary coking wastewater effluent. a 6-h operation of the coupled electrochem. system (undivided electrolytic cell with PbO2/Ti anode and Cu/Zn cathode) at a 37.5 mA/cm2 c.d. removed 87.8% of COD and 86.5% total N. ESR results suggested ClO- formation in the system and probe experiments confirmed the ClO- predominance, whose steady-state concentrations (8.08 x 10-13 M) were 16.4, 26.5, and 1609.5 times those of Cl2- (4.92 x 10-14 M), OH- (3.05 x 10-14 M), and Cl- (5.02 x 10-16 M), resp. the COD removal rate constant and the Faradaic efficiency of anodic oxidation obtained with Cl- and HCO3- was linearly proportional to the natural logarithm of the ClO- concentration; specific energy consumption was inversely correlated to it, demonstrating the crucial role of ClO- for pollutant removal. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Formula: C8H10O2

The Article related to electrochem oxidation wastewater treatment secondary coking effluent inorganic removal, simultaneous organic carbon total nitrogen coking wastewater, secondary coking effluent simultaneous cod total nitrogen removal, wastewater escherichia toxicity biol stress and other aspects.Formula: C8H10O2

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

On March 30, 2020, Karmel, Caleb; Rubel, Camille Z.; Kharitonova, Elena V.; Hartwig, John F. published an article.Safety of 2-(4-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane The title of the article was Iridium-Catalyzed Silylation of Five-Membered Heteroarenes: High Sterically Derived Selectivity from a Pyridyl-Imidazoline Ligand. And the article contained the following:

The steric effects of substituents on five-membered rings are less pronounced than those on six-membered rings because of the difference in bond angles. Thus, the regioselectivities of reactions of five-membered heteroarenes that occur with selectivities dictated by steric effects, such as the borylation of C-H bonds, were poor in many cases. The authors report that the silylation of five-membered-ring heteroarenes occurs with high sterically derived regioselectivity when catalyzed by the combination of [Ir(cod)(OMe)]2 (cod = 1,5-cyclooctadiene) and a phenanthroline ligand or a new pyridyl-imidazoline ligand that further increases the regioselectivity. The silylation reactions with these catalysts produce high yields of heteroarylsilanes from functionalization at the most sterically accessible C-H bonds of these rings under conditions that the borylation of C-H bonds with previously reported catalysts formed mixtures of products or products that are unstable. The heteroarylsilane products undergo cross-coupling reactions and substitution reactions with ipso selectivity to generate heteroarenes that bear halogen, aryl, and perfluoroalkyl substituents. The experimental process involved the reaction of 2-(4-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 1073339-22-6).Safety of 2-(4-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

The Article related to iridium catalyzed silylation borylation five membered heteroarene steric effects, heteroarene silylated stereoselective preparation, borane heteroarene derivative preparation, c−h functionalization, heteroarenes, iridium catalysis, regioselectivity, silylation and other aspects.Safety of 2-(4-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

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

On October 11, 2020, Poole, Colin F. published an article.Computed Properties of 93-04-9 The title of the article was Selection of calibration compounds for selectivity evaluation of wall-coated, open-tubular columns for gas chromatography by the solvation parameter model. And the article contained the following:

To facilitate faster selectivity evaluation of wall-coated, open-tubular columns using the solvation parameter model a reduced set of calibration compounds is identified and validated for the temperature ranges 60-140°C and 160-260°C. The Kennard-Stone uniform mapping algorithm is used to identify the calibration compounds from a larger database of compounds with known retention properties previously adopted for column selectivity evaluation. Thirty-five compounds for each temperature range are required to minimize the standard deviation of the system constants used for selectivity evaluation and to minimize differences between system constants determined by conventional calibration and the reduced calibration compounds The models for the reduced calibration compounds on ten siloxane-based and poly(ethylene glycol) stationary phases have a coefficient of determination of 0.984 to 0.998 and standard error of the estimate of 0.012 to 0.30. The predictive capability of models is evaluated for the reduced sets of calibration compounds using external test sets with ranking of the calibration models by changes in the average error, average absolute error and root mean square error of prediction for the test sets. For the selected thirty-five reduced calibration compounds the range for the average absolute error was 0.014 to 0.033 and 0.016 to 0.040 for the root mean square error of prediction for the independent test sets. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Computed Properties of 93-04-9

The Article related to selection calibration compound selectivity evaluation wall coated, open tubular column gas chromatog solvation parameter model, calibration compounds, gas chromatography, open-tubular columns, selectivity, solvation parameter model, system constants, wall-coated and other aspects.Computed Properties of 93-04-9

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