Month: November 2022

On June 30, 2022, Yuan, Donghai; Liu, Guangyu; Qi, Fei; Wang, Jinggang; Kou, Yingying; Cui, Yanqi; Bai, Minghui; Li, Xinyu published an article.SDS of cas: 150-78-7 The title of the article was Kinetic study on degradation of micro-organics by different UV-based advanced oxidation processes in EfOM matrix. And the article contained the following:

Effluent organic matter (EfOM) contains a large number of substances that are harmful to both the environment and human health. To avoid the neg. effects of organic matter in EfOM, advanced treatment of organic matter is an urgent task. Four typical oxidants (H2O2, PS, PMS, NaClO) and UV-combined treatments were used to treat micro-contaminants in the presence or absence of EfOM, because the active radical species produced in these UV-AOPs are highly reactive with organic contaminants. However, the removal efficiency of trace contaminants was greatly affected by the presence of EfOM. The degradation kinetics of two representative micro-contaminants (benzoic acid (BA) and para chlorobenzoic acid (pCBA)) was significantly reduced in the presence of EfOM, compared to the degradation kinetics in its absence. Using the method of competitive kinetics, with BA, pCBA, and 1,4-dimethoxybenzene (DMOB) as probes, the radicals (HO路, SO4-路, ClO路) proved to be the key to reaction species in advanced oxidation processes. UV irradiation on EfOM was not primarily responsible for the degradation of micro-contaminants. The second-order rate constants of the EfOM with radicals were determined to be (5.027 卤 0.643) x 102 (SO4-路), (3.192 卤 0.153) x 104 (HO路), and 1.35 x 106 (ClO路) (mg C/L)-1 s-1. In addition, this study evaluated the production of three radicals based on the concept of Rct, which can better analyze its reaction mechanism. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).SDS of cas: 150-78-7

The Article related to degradation microorg uv advanced oxidation processes efom matrix, advanced oxidation processes (aops), effluent organic matter (efom), hydroxyl radical, second-order reaction rate constants, sulfate radical and other aspects.SDS of cas: 150-78-7

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

On February 19, 2021, Falk, Eric; Gasser, Valentina C. M.; Morandi, Bill published an article.SDS of cas: 321-28-8 The title of the article was Synthesis of N-Alkyl Anilines from Arenes via Iron-Promoted Aromatic C-H Amination. And the article contained the following:

We report both an intermol. C-H amination of arenes to access N-methylanilines and an intramol. variant for the synthesis of tetrahydroquinolines. A newly developed, highly electrophilic aminating reagent was key for the direct synthesis of unprotected N-methylanilines from simple arenes. The reactions display a broad functional group tolerance and employ catalytic amounts of a benign iron salt under mild reaction conditions. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).SDS of cas: 321-28-8

The Article related to arene oxymethylammonium triflate iron catalyst regioselective amination, methyl arylamine preparation, tosyloxy phenylpropyl carbamate iron catalyst regioselective amination, tetrahydroquinoline preparation and other aspects.SDS of cas: 321-28-8

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

On October 18, 2002, Capozzi, Maria Annunziata M.; Cardellicchio, Cosimo; Naso, Francesco; Rosito, Valerio published an article.Safety of Benzyl(4-bromophenyl)sulfane The title of the article was A Straightforward Enantioselective Route to Dialkyl Sulfoxides Based upon Two Carbon-for-Carbon Substitution Reactions on the Sulfinyl Group. And the article contained the following:

(R)-Benzyl p-bromophenyl sulfoxide (I) was obtained on a multigram scale and in an enantiomerically pure form by enantioselective catalytic oxidation of benzyl p-bromophenyl sulfide with tert-Bu hydroperoxide in the presence of chiral titanium complexes. Some mechanistic and stereochem. features of the process were also studied. I was then subjected to two consecutive substitution reactions with different Grignard reagents, which caused two sequentially stereocontrolled carbon-for-carbon displacements, leading to chiral nonracemic dialkyl sulfoxides. The experimental process involved the reaction of Benzyl(4-bromophenyl)sulfane(cas: 53136-21-3).Safety of Benzyl(4-bromophenyl)sulfane

The Article related to sulfoxide dialkyl chiral enantioselective preparation, sulfide benzyl bromophenyl chiral titanium complex catalyzed enantioselective oxidation, benzylsulfoxide bromophenyl preparation stereoselective grignard substitution and other aspects.Safety of Benzyl(4-bromophenyl)sulfane

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

On June 15, 2021, Wang, Juan; Ming, Yuezhang; Li, Youming; Huang, Mingquan; Luo, Siqi; Li, Huifeng; Li, Hehe; Wu, Jihong; Sun, Xiaotao; Luo, Xuelian published an article.Application of 91-16-7 The title of the article was Characterization and comparative study of the key odorants in Caoyuanwang mild-flavor style Baijiu using gas chromatography-olfactometry and sensory approaches. And the article contained the following:

Caoyuanwang Baijiu (CYW), a mild-flavor style Baijiu (MSB), is popular in northern China. However, there is a lack of studies reporting its aroma-active components. The aroma compounds of five CYW samples were analyzed using gas chromatog.-olfactory-mass spectrometry coupled with aroma extraction dilution anal. Fifty-five aroma-active compounds were identified in CYW, of which 27 had odor activity values ≥ 1. Reconstituted models successfully simulated the aroma profiles of CYW. The omission tests elucidated that β-damascenone, di-Me trisulfide, Et pentanoate, butanoic acid, Et acetate, 3-methylbutanal, Et lactate, hexanoic acid, γ-nonalactone, 3-hydroxy-2-butanone, Et butanoate, 1-propanol, 4-(ethoxymethyl)-2-methoxy-phenol, and vanillin were key odorants in CYW. The addition test confirmed the significant influence of di-Me trisulfide on Chen-aroma note. Nine key odorants were identified as the differential quality-markers, and 85.71% key odorants were predicted using the partial least square regression (PLSR) anal., indicating the applicability of PLSR in selecting the target compounds for omission tests. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Application of 91-16-7

The Article related to butanoic hydrocinnamic vanillin acid phenol odarant aroma caoyuanwang baijiu, caoyuanwang baijiu, gas chromatography-olfactory-mass spectrometry, key odorants, odor activity values, partial least squares regression analysis and other aspects.Application of 91-16-7

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

On July 16, 2021, Thorwart, Thaddaus; Roth, Daniel; Greb, Lutz published an article.Quality Control of 1,2-Dimethoxybenzene The title of the article was Bis(pertrifluoromethylcatecholato)silane: Extreme Lewis Acidity Broadens the Catalytic Portfolio of Silicon. And the article contained the following:

Given its earth abundance, Si is ideal for constructing Lewis acids of use in catalysis or materials science. Neutral silanes were limited to moderate Lewis acidity, until halogenated catecholato ligands provoked a significant boost. However, catalytic applications of bis(perhalocatecholato)silanes were suffering from very poor solubility and unknown deactivation pathways. The novel per(trifluoromethyl)catechol, H2catCF3, and adducts of its Si complex Si(catCF3)2 (1) are described. According to the computed F- ion affinity, 1 ranks among the strongest neutral Lewis acids currently accessible in the condensed phase. The improved robustness and affinity of 1 enable deoxygenations of aldehydes, ketones, amides, or phosphine oxides, and a carbonyl-olefin metathesis. All those transformations have never been catalyzed by a neutral silane. Attempts to obtain donor-free 1 attest to the extreme Lewis acidity by stabilizing adducts with even the weakest donors, such as benzophenone or hexaethyl disiloxane. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Quality Control of 1,2-Dimethoxybenzene

The Article related to silane fluoromethylcatecholato preparation lewis acidity deoxygenation metathesis catalyst, crystal structure silicon trifluoromethylcatechol complex, lewis superacids, catechol, deoxygenation, homogeneous catalysis, silicon and other aspects.Quality Control of 1,2-Dimethoxybenzene

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

On April 4, 2000, Neef, C. J.; Ferraris, J. P. published an article.Related Products of 146370-51-6 The title of the article was MEH-PPV: Improved Synthetic Procedure and Molecular Weight Control. And the article contained the following:

Mechanistic studies on the polymerization of α,α’-dibromo-2-methoxy-5-(2-ethylhexyloxy)xylene have been performed. Polymerizations were initially carried out by adding potassium tert-butoxide to monomer in the presence of a chain transfer agent, anthracene. Anthracene showed little effect on the mol. weight of the resulting polymer, suggesting that the major polymerization route was not radically initiated. Polymerizations were also carried out by adding monomer to potassium tert-butoxide in presence of a nucleophile, 4-methoxyphenol. The mol. weight of the resulting polymer scaled linearly with the amount of 4-methoxyphenol, suggesting an anionic mechanism. In addition, each polymerization was monitored by in-situ torque measurements to further elucidate the polymerization mechanism and optimize polymerization conditions. The experimental process involved the reaction of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene(cas: 146370-51-6).Related Products of 146370-51-6

The Article related to polyphenylenevinylene methoxy ethylhexyloxy conjugated polymer preparation, chain transfer agent anthracene polyphenylenevinylene preparation, nucleophile methoxyphenol polyphenylenevinylene anionic polymerization preparation and other aspects.Related Products of 146370-51-6

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

On August 31, 2015, Sun, Kai; Li, Yan; Zhang, Qian published an article.Name: 1-Fluoro-2-methoxybenzene The title of the article was Copper-catalyzed arenes amination with saccharins. And the article contained the following:

Synthesis of N-arylsaccharins I [R = 4-C6H5C6H4, C6H5, 1-naphthyl, etc.] and N-arylisothioazolones e.g. II [R1 = CH3, R2 = 4-ClC6H4] via copper-catalyzed direct C-N bond formation of simple arenes with saccharins/isothiazolones under relatively mild conditions was developed. This work provided a new method for oxidative coupling of aromatic C(sp2)-H bonds and N-H bonds by using arenes as limiting reagents. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Name: 1-Fluoro-2-methoxybenzene

The Article related to arylsaccharin regioselective preparation mechanism, saccharin arene copper catalyst amination regioselective, arylisothiazolone regioselective preparation mechanism, isothiazolone arene copper catalyst amination regioselective and other aspects.Name: 1-Fluoro-2-methoxybenzene

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

Yan, Boyu; Zhou, Yutong; Wu, Jieliang; Ran, Maogang; Li, Huihui; Yao, Qiuli published an article in 2021, the title of the article was Catalyst-free reductive hydrogenation or deuteration of aryl-heteroatom bonds induced by light.Recommanded Product: 93-04-9 And the article contains the following content:

A simple and catalyst-free photochem. strategy for the direct reduction of aryl trimethylammonium salts ArNMe3OTf (Ar = biphenyl-4-yl, 2-naphthyl, quinolin-3-yl, etc.), aryl triflates Ar1OTf (Ar1 = biphenyl-3-yl, 1,6-dimethylpyridin-4-yl, benzothiazol-5-yl, etc.), and haloarenes Ar2X (Ar2 = biphenyl-4-yl, 2-naphthyl, quinolin-4-yl, etc.; X = Cl, Br, I) to arenes ArH/Ar1H or deuterium-labeled arenes ArD/Ar1D/Ar2D was described. A broad range of substrate scope was demonstrated with high yields and deuterium incorporations. Radical clock experiments indicate the formation of aryl radical intermediates that can also be trapped by phenols. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Recommanded Product: 93-04-9

The Article related to aromatic hydrocarbon preparation, aryl deuterated compound preparation, quaternary arylammonium salt reductive hydrogenation deuteration, triflate aryl reductive hydrogenation deuteration, arylhalide dehalogenation deuteration and other aspects.Recommanded Product: 93-04-9

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

On June 12, 2017, Zhu, Lei; Qi, Xiaotian; Li, Yingzi; Duan, Meng; Zou, Lufeng; Bai, Ruopeng; Lan, Yu published an article.Product Details of 1417036-28-2 The title of the article was Ir(III)/Ir(V) or Ir(I)/Ir(III) Catalytic Cycle? Steric-Effect-Controlled Mechanism for the para-C-H Borylation of Arenes. And the article contained the following:

A potential energy surface for iridium-catalyzed C-H-borylation of aromatic compounds was calculated; while bulky phosphine ligands favor Ir(I)-Ir(III) C-H activation, small amine ligands promote formation of triboryl Ir(V) intermediates. D. functional theory method N12 was used to study the mechanism of the [Ir(cod)OH]2/Xyl-MeO-BIPHEP-catalyzed para-selective C-H borylation reaction. The results revealed that the use of a bulky diphosphine ligand such as Xyl-MeO-BIPHEP was unfavorable for the previously proposed iridium(III)/iridium(V) catalytic cycle because it resulted in considerable steric repulsion in the hepta-coordinated iridium(V) intermediate. Inspired by this steric effect, we have proposed a novel iridium(I)/iridium(III)-based catalytic cycle for this transformation and shown that it can be used to account for the exptl. results. The iridium(I)/iridium(III) catalytic cycle induced by this steric effect consists of several steps, including: (i) the oxidative addition of the C-H bond of the substrate to an active iridium(I) boryl complex; (ii) the reductive elimination of a C-B bond; (iii) the oxidative addition of B2pin2 to an iridium(I) hydride complex; and (iv) the reductive elimination of a B-H bond. Notably, the computed regioselectivity of this reaction was consistent with the exptl. observations. The high para-selectivity of this reaction was also explained using structural anal. and a 2D contour model, which revealed that the strong steric repulsion between the diphosphine ligand and the meta-substituents resulted in a higher energy barrier for meta-C-H activation. The experimental process involved the reaction of 2-(3-Methoxy-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 1417036-28-2).Product Details of 1417036-28-2

The Article related to potential energy surface direct ch borylation arene iridium catalyst, diphosphine diamine iridium complex catalyst arene borylation intermediate geometry, steric effect ligand mechanism direct borylation arene iridium catalyst and other aspects.Product Details of 1417036-28-2

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