Tag: 100-200

On November 30, 2013, Magalhaes, Ana L.; Vaz, Raquel V.; Goncalves, Ricardo M. G.; Da Silva, Francisco A.; Silva, Carlos M. published an article.Application In Synthesis of 1-Fluoro-2-methoxybenzene The title of the article was Accurate hydrodynamic models for the prediction of tracer diffusivities in supercritical carbon dioxide. And the article contained the following:

The tracer diffusion coefficients, D12, are fundamental properties for the design and simulation of rate-controlled processes. Nowadays, under the scope of the biorefinery concept and strict environmental legislation, the D12 values are increasingly necessary for extractions, reactions, and chromatog. separations carried out at supercritical conditions, particularly using carbon dioxide. Hence, the main objective of this work is the development of accurate and simple models for the pure prediction of D12 values in supercritical CO2. Two modified Stokes-Einstein equations (mSE1 and mSE2) are proposed and validated using a large database comprehending extremely distinct mols. in terms of size, mol. weight, polarity and sphericity. The global deviations achieved by the mSE1 (Eqs. (2) and (13)) and mSE2 (Eqs. (5), (13), (3), (4)) models are only 6.38% and 6.75%, resp., in contrast to the significant errors provided by known predictive correlations available in the literature: Wilke-Chang, 12.17%; Tyn-Calus, 17.01%; Scheibel, 19.04%; Lusis-Ratcliff, 27.32%; Reddy-Doraiswamy, 79.34%; Lai-Tan, 25.82%. Also, the min. and maximum deviations achieved by the new models are much smaller than those of the reference equations adopted for comparison. In conclusion, the mSE1 and mSE2 models can be recommended for the prediction of tracer diffusivities in supercritical CO2. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Application In Synthesis of 1-Fluoro-2-methoxybenzene

The Article related to accurate hydrodynamic model prediction tracer diffusivities supercritical carbon dioxide, Unit Operations and Processes: Mass Transfer and other aspects.Application In Synthesis of 1-Fluoro-2-methoxybenzene

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Deng, Jiazhu; Xue, Teng; Wu, Haihong; Wu, Peng published an article in 2022, the title of the article was Preparation of a cost-effective Ni-Ag bimetallic catalyst for hydrodehalogenation of aryl halides under mild conditions.Category: ethers-buliding-blocks And the article contains the following content:

Cost-effective Ni-Ag bimetallic nanoparticles were prepared using an aqueous-phase surfactant-aided co-reduction process and used as catalysts for the hydrodehalogenation of aryl halides CAr-X (X = F, Cl, Br). CAr-X could be easily converted at 60°C by using water as a solvent, with a CAr-H yield higher than 90%. This catalyst was widely applicable in the hydrodehalogenation of halogenated aromatics with various functional groups (more than 40 examples), including the high concentration solution of aryl fluorides, polyhalogenated phenol, environmental pollutants like 2,4-dichlorophenoxyacetic acid (2,4-D) and triclosan. Furthermore, it could be easily recycled and reused, providing a green and cost-effective method for the degradation of polyhalogenated aromatic pollutants and synthesis of important structural units through hydrodehalogenation reactions. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Category: ethers-buliding-blocks

The Article related to nickel silver bimetallic catalyst preparation hydrodehalogenation aryl halide green, General Organic Chemistry: Synthetic Methods and other aspects.Category: ethers-buliding-blocks

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On July 20, 2020, Lielpetere, Anna; Jirgensons, Aigars published an article.Related Products of 93-04-9 The title of the article was Friedel-Crafts Alkylation with Carbenium Ions Generated by Electrochemical Oxidation of Stannylmethyl Ethers. And the article contained the following:

The electrochem. activation of stannylmethyl ethers was exploited for Friedel-Crafts alkylation of arenes at near-neutral conditions. Single cell anodic oxidation of stannylmethyl ethers leads to oxonium ions which fragment to carbenium ions in the presence of electron rich arenes. Low oxidation potential of stannylmethyl ethers and buffered conditions enable the Friedel-Crafts reaction with a wide range of arenes including the substrates with acid-sensitive groups. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Related Products of 93-04-9

The Article related to friedel crafts alkylation stannylmethyl ether arene electrochem oxidation carbenium, General Organic Chemistry: Synthetic Methods and other aspects.Related Products of 93-04-9

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Burrows, James; Kamo, Shogo; Koide, Kazunori published an article in 2021, the title of the article was Scalable Birch reduction with lithium and ethylenediamine in tetrahydrofuran.SDS of cas: 578-58-5 And the article contains the following content:

A Birch reduction promoted by lithium and ethylenediamine (or analogs) in THF at ambient temperature were reported. This method is easy to set up, inexpensive, scalable, rapid, accessible to any chem. laboratory and capable of reducing both electron-rich and electron-deficient substrates. This protocol is also compatible with organocuprate chem. for further functionalization. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).SDS of cas: 578-58-5

The Article related to arene lithium ethylenediamine birch reduction, fused cyclohexadiene preparation, General Organic Chemistry: Synthetic Methods and other aspects.SDS of cas: 578-58-5

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Wang, Tonglin; Xie, Anqi; Zhang, Dongliang; Liu, Zemiao; Li, Xue; Li, Yang; Sun, Xia published an article in 2021, the title of the article was Analysis of the volatile components in flowers of Paeonia lactiflora Pall. and Paeonia lactiflora Pall. var. Trichocarpa.HPLC of Formula: 150-78-7 And the article contains the following content:

Paeonia lactiflora Pall. var. trichocarpa is a variety of Paeonia lactiflora Pall., and is currently the peony herb’s principal cultivar group. Here, we study the differences in aromatic components and flowers of different varieties between two groups of cultivars, providing a reference for applying natural fragrance substances of peonies, breeding fragrant flower types, and developing and using improved varieties. Headspace solid-phase microextraction (HS-SPME), gas chromatog.-mass spectrometry (GC-MS), peak area normalization for each component relative to content, component library (NIST14/NIST14S) retrieval, and a literature review were used to analyze the volatile compounds in flowers of eight peony varieties, such as “Gaoganhong”, and ten comospore peony varieties, such as “Jinshanhong”. Results showed that the main volatile compound constituents in flowers of the two groups were terpenes and alcs. Addnl., the content of eucalyptol, caryophyllene, α-Pinene, citronellol, and 3-Hexen-1-ol, acetate, (Z) was high. Peony cultivars contained linalool, (1R)-2,6,6-trimethylbicyclo[3.1.1]hept-2-ene, and 1,4-dimethoxybenzene, while comospore peony varieties contained 1,3,6-octatriene, 3,7-dimethyl-, (Z)-, phenylethyl alc., and geraniol. In this study, the differences between the volatile components of flowers of different peony varieties were clarified, laying a foundation for further mol. biol. research into the floral fragrance of peonies and the cultivation of new varieties of aromatic peonies. At the same time, it also provides a theor. basis for the development and application of peony flower byproducts. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).HPLC of Formula: 150-78-7

The Article related to analysis volatile component flower paeonia gas chromatogphy mass spectrometry, Plant Biochemistry: Composition and Products and other aspects.HPLC of Formula: 150-78-7

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On December 31, 2022, Huang, Long; Ji, Tengfei; Zhu, Chen; Yue, Huifeng; Zhumabay, Nursaya; Rueping, Magnus published an article.Computed Properties of 93-04-9 The title of the article was Bioinspired desaturation of alcohols enabled by photoredox proton-coupled electron transfer and cobalt dual catalysis. And the article contained the following:

In the biosynthesis of sterols an enzyme-catalyzed demethylation is achieved via a stepwise oxidative transformation of alcs. e.g., 1-(4-methoxyphenyl)cyclodecan-1-ol to olefins e.g., 4-(OCH3)C6H4C(O)(CH2)7CH=CH2. The overall demethylation proceeds through two sequential monooxygenation reactions and a subsequent dehydroformylative saturation To mimic the desaturation processes observed in nature, photoredox proton-coupled electron transfer (PCET) and cobaloxime chem. were successfully integrated for the acceptorless dehydrogenation of alcs. The state-of-the-art remote and precise desaturation of ketones RC(O)(CH2)3CH=CH2 [R = 4-(tert-butoxy)phenyl, phenanthren-9-yl, 1-benzothiophen-2-yl, etc.] proceeds efficiently through the activation of cyclic alcs. I using bond-dissociation free energy (BDFE) as thermodn. driving force. The resulting transient alkoxyl radical allows C-C bond scission to generate the carbon-centered radical remote to the carbonyl moiety. The key intermediate is subsequently combined with cobaloxime photochem. to furnish the alkene. Moreover, the mild protocol can be extended to desaturation of linear alcs. as well as aromatic hydrocarbons. Application to bioactive mols. and natural product derivatives is also presented. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Computed Properties of 93-04-9

The Article related to olefin preparation, alc cross coupling reaction photoredox cobalt catalyst, General Organic Chemistry: Synthetic Methods and other aspects.Computed Properties of 93-04-9

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Ether – Wikipedia,
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Grochowicz, Marta; Szajnecki, Lukasz; Rogulska, Magdalena published an article in 2022, the title of the article was Crosslinked 4-Vinylpyridine Monodisperse Functional Microspheres for Sorption of Ibuprofen and Ketoprofen.Recommanded Product: 150-78-7 And the article contains the following content:

Nowadays, ibuprofen and ketoprofen are widely used over-the-counter medications to treat inflammation, fever, or pain. Their high consumption and improper disposal cause them to get into the environment and often pollute surface water. In this study, the new polymeric porous microspheres based on 4-vinylpyridine (4VP) are presented as effective sorbents for ibuprofen and ketoprofen preconcentration and removal. The porous microspheres were obtained via seed swelling polymerization with the use of two types of methacrylate crosslinkers, i.e., trimethylolpropane trimethacrylate (TRIM) and 1,4-dimethacryloiloxybenzene (14DMB). Addnl., as a reference sorbent, a copolymer of styrene and divinylbenzene was obtained. Porous structure investigations showed that the microspheres possess a sp. surface area of about 100 m2/g, but noticeable differences were observed in their internal topog. depending on the type of crosslinker used. Moreover, the porous structure of dry and swollen microspheres differs significantly. Swollen copolymers reveal the presence of micropores. The 4VP microspheres are characterized by high thermal stability; their initial decomposition temperature is about 300°C. The performance of the 4VP copolymers as sorbents in aqueous solutions of drugs was evaluated in static and dynamic modes at three pH values of 3, 7, and 11. The highest sorption efficiency was obtained for ibuprofen and ketoprofen in pH 3. Both 4VP copolymers indicate the high sorption capacity in a static sorption as follows: towards ketoprofen of about 40 mg/g whereas towards ibuprofen of about 90 mg/g and 75 mg/g on copolymer crosslinked with trimethylolpropane trimethacrylate and 1,4-dimethacryloiloxybenzene, resp. The recovery of ibuprofen and ketoprofen after dynamic sorption experiments was higher than 90%. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Recommanded Product: 150-78-7

The Article related to ibuprofen ketoprofen vinylpyridine microsphere crosslinking, spe, functional polymers, ibuprofen, ketoprofen, polymeric microspheres, porous polymers, sorption, Pharmaceuticals: Formulation and Compounding and other aspects.Recommanded Product: 150-78-7

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Ether – Wikipedia,
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Washington, Jack B.; Assante, Michele; Yan, Chunhui; McKinney, David; Juba, Vanessa; Leach, Andrew G.; Baillie, Sharon E.; Reid, Marc published an article in 2021, the title of the article was Trialkylammonium salt degradation: implications for methylation and cross-coupling.Product Details of 93-04-9 And the article contains the following content:

This study presented a mechanistic degradation anal. of N,N,N-trimethylanilinium salts and highlighted implications for synthetic applications of this important class of salts. Kinetic degradation studies, in both solid and solution phases, had delivered insights into phys. and chem. parameters affecting anilinium salt stability. 1H NMR kinetic anal. of salt degradation had evidenced thermal degradation to Me iodide and parent aniline, consistent with a closed-shell SN2-centered degradative pathway, and Me iodide being key reactive species in applied methylation procedures. Furthermore, effect of halide and non-nucleophilic counterions on salt degradation had been investigated, along with deuterium isotope and solvent effects. New mechanistic insights had enabled investigation of use of trimethylanilinium salts in O-methylation and in improved cross-coupling strategies. Finally, detailed computational studies had helped highlight limitations in current state-of-the-art of solvation modeling of reaction in which bulk medium undergoes exptl. observable changes over reaction timecourse. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Product Details of 93-04-9

The Article related to trialkylammonium salt preparation degradation reaction mechanism dft, methoxy hydrocarbon preparation, alc acid phenol trimethylanilinium salt methylation, General Organic Chemistry: Synthetic Methods and other aspects.Product Details of 93-04-9

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Ether | (C2H5)2O – PubChem

Washington, Jack B.; Assante, Michele; Yan, Chunhui; McKinney, David; Juba, Vanessa; Leach, Andrew G.; Baillie, Sharon E.; Reid, Marc published an article in 2021, the title of the article was Trialkylammonium salt degradation: implications for methylation and cross-coupling.Recommanded Product: 2-Methylanisole And the article contains the following content:

This study presented a mechanistic degradation anal. of N,N,N-trimethylanilinium salts and highlighted implications for synthetic applications of this important class of salts. Kinetic degradation studies, in both solid and solution phases, had delivered insights into phys. and chem. parameters affecting anilinium salt stability. 1H NMR kinetic anal. of salt degradation had evidenced thermal degradation to Me iodide and parent aniline, consistent with a closed-shell SN2-centered degradative pathway, and Me iodide being key reactive species in applied methylation procedures. Furthermore, effect of halide and non-nucleophilic counterions on salt degradation had been investigated, along with deuterium isotope and solvent effects. New mechanistic insights had enabled investigation of use of trimethylanilinium salts in O-methylation and in improved cross-coupling strategies. Finally, detailed computational studies had helped highlight limitations in current state-of-the-art of solvation modeling of reaction in which bulk medium undergoes exptl. observable changes over reaction timecourse. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).Recommanded Product: 2-Methylanisole

The Article related to trialkylammonium salt preparation degradation reaction mechanism dft, methoxy hydrocarbon preparation, alc acid phenol trimethylanilinium salt methylation, General Organic Chemistry: Synthetic Methods and other aspects.Recommanded Product: 2-Methylanisole

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

On March 29, 2021, Huang, Lin; Bismuto, Alessandro; Rath, Simon A.; Trapp, Nils; Morandi, Bill published an article.Formula: C11H10O The title of the article was Ruthenium-Catalyzed Dehydrogenation Through an Intermolecular Hydrogen Atom Transfer Mechanism. And the article contained the following:

The direct dehydrogenation of alkanes is among the most efficient ways to access valuable alkene products. Although several catalysts have been designed to promote this transformation, they have unfortunately found limited applications in fine chem. synthesis. Here, we report a conceptually novel strategy for the catalytic, intermol. dehydrogenation of alkanes using a ruthenium catalyst. The combination of a redox-active ligand and a sterically hindered aryl radical intermediate has unleashed this novel strategy. Importantly, mechanistic investigations have been performed to provide a conceptual framework for the further development of this new catalytic dehydrogenation system. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Formula: C11H10O

The Article related to alkane dehydrogenation ruthenium catalyst reaction mechanism, alkenes, aryl radicals, dehydrogenation, hydrogenation atom transfer, redox-active ligands, General Organic Chemistry: Synthetic Methods and other aspects.Formula: C11H10O

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Ether – Wikipedia,
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