Tag: 100-200

On March 12, 2021, Butzelaar, Andreas J.; Liu, Kun L.; Roering, Philipp; Brunklaus, Gunther; Winter, Martin; Theato, Patrick published an article.Related Products of 929-37-3 The title of the article was A Systematic Study of Vinyl Ether-Based Poly(Ethylene Oxide) Side-Chain Polymer Electrolytes. And the article contained the following:

Herein, we report on the synthesis of a systematic library of vinyl ether-based poly(ethylene oxide) (PEO) side-chain copolymers in order to reduce the crystallization of PEO. The influence of different grafted PEO side chain lengths, the grafting d., and the [Li+]:[EO] ratio after mixing with LiTFSI on the glass transition temperature (Tg), the crystallinity, and the resulting ionic conductivity was examined Copolymers bearing longer PEO side chains and higher grafting densities show higher crystallization tendencies while their Tg is reduced at the same time. Furthermore, the addition of LiTFSI reduces crystallization but increases Tg. Because these effects are directly impacting the ionic conductivity, we demonstrate that the different parameters need to be carefully adjusted in order to balance their influence. In this way, a fundamental view that shows the potential of PEO side-chain copolymers for their applications as polymer electrolytes is provided. The experimental process involved the reaction of 2-(2-(Vinyloxy)ethoxy)ethanol(cas: 929-37-3).Related Products of 929-37-3

The Article related to vinyl ether polyethylene oxide polymer electrolyte, Physical Properties of Synthetic High Polymers: Physical Properties Of Polymers and other aspects.Related Products of 929-37-3

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

On April 30, 2020, Birolli, Willian Garcia; Zanin, Lucas Lima; Jimenez, David Esteban Quintero; Porto, Andre Luiz Meleiro published an article.Safety of 1,4-Dimethoxybenzene The title of the article was Synthesis of Knoevenagel Adducts Under Microwave Irradiation and Biocatalytic Ene-Reduction by the Marine-Derived Fungus Cladosporium sp. CBMAI 1237 for the Production of 2-Cyano-3-Phenylpropanamide Derivatives. And the article contained the following:

Abstract: The organic synthesis has been driven by the need of sustainable processes, which also requires efficiency and cost-effectiveness. In this work, we described the synthesis of nine Knoevenagel adducts between cyanoacetamide and aromatic aldehydes ((E)-2-cyano-3-(phenyl)acrylamide derivatives), employing triethylamine as catalyst under microwave irradiation in 30 min with excellent yields (93-99% yield). Then, these adducts were employed in the C-C double bond bioreduction by the marine-derived fungus Cladosporium sp. CBMAI 1237 for obtention of 2-cyano-3-phenylpropanamide derivatives in mild conditions and short reaction time for a whole-cells reduction (phosphate buffer pH 7.0, 32°C, 130 rpm, 8 h) with good yields (48-90%). It is important to emphasize that the exptl. conditions, especially the reaction time, should be carefully evaluated for the obtention of high yields. Since a biodegradation process consumed the obtained product in extended periods, probably due to the use of the substrate as carbon and nitrogen source. This approach showed that the use of coupled and greener catalysis methods such as microwave irradiation and biocatalytic reduction, which employs unique biocatalysts like marine-derived fungi, can be an interesting tool for the obtention of organic mols. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Safety of 1,4-Dimethoxybenzene

The Article related to cladosporium biotransformation, biocatalysis, bioreduction, biotransformation, green chemistry, knoevenagel condensation, Fermentation and Bioindustrial Chemistry: Single-Cell Protein and Cell Growth and other aspects.Safety of 1,4-Dimethoxybenzene

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

Pereira, Raul; Wolstenhulme, Jamie; Sandford, Graham; Claridge, Timothy D. W.; Gouverneur, Veronique; Cvengros, Jan published an article in 2016, the title of the article was Synthesis and characterization of a novel N-F reagent derived from the ethano-Tröger’s base: 1JFN coupling constants as a signature for the N-F bond.Application of 321-28-8 And the article contains the following content:

Methylation of 2,8-dimethyl-6H,12H-5,11-ethanodibenzo[b,f][1,5]-diazocine (ethano-Troddoger’s base) with Me iodide followed by ion metathesis and fluorination with N-fluoro-2,3,4,5,6-pentachloropyridinium triflate affords a new electrophilic N-F reagent, that is more reactive than Selectfluor. 2D 19F-15N HMQC experiments provide 1JNF coupling constants which are diagnostic for the N-F functional group. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Application of 321-28-8

The Article related to electrophile preparation dimethylethanodibenzodiazocine methylation metathesis fluorination hmqc coupling constant, Physical Organic Chemistry: Addition, Elimination, and Substitution Reactions and other aspects.Application of 321-28-8

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

On May 31, 2018, Zhou, Fan; Zhang, Jingshuang; Fu, Tianyi; Bai, Peng; Guo, Xianghai published an article.Recommanded Product: 321-28-8 The title of the article was Theoretical study on complexes and reactions of boron isotopic exchange separation with fluorinated anisoles as novel donors. And the article contained the following:

Semi-empirical and ab initio d.-functional theory (DFT) methods were evaluated for the description of isotope exchange reactions to produce enriched 10B species. We found that DFT calculations using M06-2X/6-311+G(3d,2p) functional and basis sets in combination with the SMD implicit solvation model were able to correctly predict the performance of various anisole-derived donor mols. We confirmed that fluorination results in greatly increased separation factors, and successfully identified the o- and 2,4-difluorinated anisole as superior donors for chem. exchange distillation These findings provide the basis for an efficient approach to rapidly screen and design new donor species. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Recommanded Product: 321-28-8

The Article related to anisole borontrifluoride complexation isotope exchange reaction enthalpy potential barrier, Physical Organic Chemistry: Addition, Elimination, and Substitution Reactions and other aspects.Recommanded Product: 321-28-8

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

Venturini, Francesco; Navarrini, Walter; Famulari, Antonino; Sansotera, Maurizio; Dardani, Patrizia; Tortelli, Vito published an article in 2012, the title of the article was Direct trifluoro-methoxylation of aromatics with perfluoro-methyl-hypofluorite.Product Details of 321-28-8 And the article contains the following content:

The reactivity of CF3OF (FTM) has been widely studied especially in halogenated olefinic systems and its use in pharmaceutical synthesis as a mild radical and electrophilic fluorinating agent is well documented. On the other hand, the chem. behavior of the perfluoromethyl hypofluorite with aromatic substrates is much less studied. Up to now few and scattered data regarding its use as electrophilic fluorinating agent of variously substituted aromatic compounds are found in the literature. In this work the reactivity of CF3OF with simple electron rich and electron poor aromatics (α,α,α-trifluorotoluene, toluene, benzene, chlorobenzene, methoxybenzene) has been investigated. The possibility of selectively bind the trifluoromethoxy group (via radical mechanism) or the fluorine atom (via electrophilic addition) by varying the reaction conditions has been explored. In particular we have observed that the trifluoromethoxy free radical substitution can be the main synthetic pathway if the reaction is promoted by an independent and steady source of CF3O radical. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Product Details of 321-28-8

The Article related to direct trifluoromethoxylation aromtic compound perfluoromethyl hypofluorite, Physical Organic Chemistry: Addition, Elimination, and Substitution Reactions and other aspects.Product Details of 321-28-8

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

On July 17, 2020, Wu, Chen; McCollom, Samuel P.; Zheng, Zhipeng; Zhang, Jiadi; Sha, Sheng-Chun; Li, Minyan; Walsh, Patrick J.; Tomson, Neil C. published an article.SDS of cas: 321-28-8 The title of the article was Aryl Fluoride Activation through Palladium-Magnesium Bimetallic Cooperation: A Mechanistic and Computational Study. And the article contained the following:

Herein is described a mechanistic study of a palladium-catalyzed cross-coupling of aryl Grignard reagents to fluoroarenes that proceeds via a low-energy heterobimetallic oxidative addition pathway. Traditional oxidative additions of aryl chlorides to Pd complexes are known to be orders of magnitude faster than with aryl fluorides, and many palladium catalysts do not activate aryl fluorides at all. The exptl. and computational studies outlined herein, however, support the view that at elevated Grignard/ArX ratios (i.e., 2.5:1), a Pd-Mg heterobimetallic mechanism predominates, leading to a remarkable decrease in the energy required for Ar-F bond activation. The heterobimetallic transition state for the C-X bond cleavage is proposed to involve simultaneous Pd backbonding to the arene and Lewis acid activation of the halide by Mg to create a low-energy transition state for oxidative addition The insights gained from this computational study led to the development of a phosphine ligand that was shown to be similarly competent for Ar-F bond activation. 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 palladium catalyzed kumada cross coupling aryl grignard reagent fluoroarene, Physical Organic Chemistry: Addition, Elimination, and Substitution Reactions and other aspects.SDS of cas: 321-28-8

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

Dhital, Raghu Nath; Nomura, Keigo; Sato, Yoshinori; Haesuwannakij, Setsiri; Ehara, Masahiro; Sakurai, Hidehiro published an article in 2020, the title of the article was Pt-Pd Nanoalloy for the Unprecedented Activation of Carbon-Fluorine Bond at Low Temperature.Product Details of 321-28-8 And the article contains the following content:

Carbon-fluorine bonds are considered the most inert organic functionality and their selective transformation under mild conditions remains challenging. Herein, we report a highly active Pt-Pd nanoalloy as a robust catalyst for the transformation of C-F bonds into C-H bonds at low temperature, a reaction that has hitherto often required harsh conditions. The alloying of Pt with Pd is crucial to promote the overall C-F bond. DFT calculations elucidated that the key step is the selective oxidative addition of the O-H bond of 2-propanol to a Pd center prior to C-F bond activation at a Pt site, which crucially reduces the activation energy of the C-F bond cleavage. Therefore, both Pt and Pd work independently but synergistically to promote the overall reaction. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Product Details of 321-28-8

The Article related to aryl fluoride hydrodefluorination platinum palladium nanoalloy catalyst, Physical Organic Chemistry: Addition, Elimination, and Substitution Reactions and other aspects.Product Details of 321-28-8

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

On September 11, 2013, Ricci, Paolo; Kramer, Katrina; Cambeiro, Xacobe C.; Larrosa, Igor published an article.Quality Control of 1-Fluoro-2-methoxybenzene The title of the article was Arene-Metal π-Complexation as a Traceless Reactivity Enhancer for C-H Arylation. And the article contained the following:

Current approaches to facilitate C-H arylation of arenes involve the use of either strongly electron-withdrawing substituents or directing groups. Both approaches require structural modification of the arene, limiting their generality. We present a new approach where C-H arylation is made possible without altering the connectivity of the arene via π-complexation of a Cr-(CO)3 unit, greatly enhancing the reactivity of the aromatic C-H bonds. We apply this approach to monofluorobenzenes, highly unreactive arenes, which upon complexation become nearly as reactive as pentafluorobenzene itself in their couplings with iodoarenes. DFT calculations indicate that C-H activation via a concerted metalation-deprotonation transition state is facilitated by the predisposition of C-H bonds in (Ar-H)-Cr-(Co)3 to bend out of the aromatic plane. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Quality Control of 1-Fluoro-2-methoxybenzene

The Article related to arene metal pi complexation traceless reactivity enhancer ch arylation, Physical Organic Chemistry: Addition, Elimination, and Substitution Reactions and other aspects.Quality Control of 1-Fluoro-2-methoxybenzene

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

On December 31, 2020, Ye, Qiaoqiao; Yokoyama, Tomoya published an article.Electric Literature of 91-16-7 The title of the article was Revisiting the mechanism of β-O-4 bond cleavage during acidolysis of lignin VII: acidolyses of non-phenolic C6-C2-type model compounds using HBr, HCl and H2SO4, and a proposal on the characteristic action of Br- and Cl-. And the article contained the following:

A non-phenolic C6-C2-type lignin model compound with the β-O-4 bond, 2-(2-methoxyphenoxy)-1-(3,4-dimethoxyphenyl)ethanol (I), was acidolyzed in aqueous 82% 1,4-dioxane containing HBr, HCl, or H2SO4 with a concentration of 0.2 mol/L at 85°C to examine the differences between these acidolyzes. Compound I primarily converted to an enol ether compound, 1-(2-methoxyphenoxy)-2-(3,4-dimethoxyphenyl)ethene (II), via the benzyl cation followed by acidolytic β-O-4 bond cleavage regardless of the acid-type, although the disappearance rates of compound I were remarkably different (HBr > HCl >> H2SO4). Acidolyzes of compound II using these acids under the same conditions showed a similar tendency, but the rate differences were much smaller than in the acidolyzes of compound I. Acidolyzes of the α-methyl-etherified derivative of compound I (I-α-OMe) using these acids under the same conditions suggested that the formation rates of the benzyl cation from compound I-α-OMe (also from compound I) are not largely different between the acidolyzes using these acids, but those of compound II from the benzyl cation are remarkably different. Acidolysis of the α-bromo-substituting derivative of compound I (I-α-Br) using HBr under the same conditions showed a characteristic action of Br in the acidolysis. Br adds to the benzyl cation generated from compound I or I-α-OMe to afford unstable compound I-α-Br, resulting in acceleration of the formation of compound II and of the whole acidolysis reaction. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Electric Literature of 91-16-7

The Article related to lignin acid hydrolysis reaction mechanism bond cleavage, Physical Organic Chemistry: Ring Formation, Cleavage, Enlargement, and Contraction and other aspects.Electric Literature of 91-16-7

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

On November 1, 2020, Zhou, Jingjing; Su, Zhengzhou; Wang, Mingqi; Wang, Yufei; Wang, Jianping; Zhang, Baoliang; Zhang, Qiuyu published an article.Computed Properties of 929-37-3 The title of the article was Thiolactone-based conjugation assisted magnetic imprinted microspheres for specific capturing target proteins. And the article contained the following:

Protein imprinted materials receive considerable attention in biol. scope but restricted about practical use for the lack of adsorption efficiency and rebinding specificity. To approach the dearth, imprinted polymers or ligands capable of designable structure, herein, the facile thiolactone-based conjugates accompanied by multiple functional units, were put forward into imprinting system as protein anchors by click chem. Due to the simple implementation and flexible reconstitution of this conjugation strategy, a series of thiol-ene-amine segments were fabricated to capture bovine serum albumin (BSA) for generating imprinting cavities through dopamine self-polymerization on well-defined hollow magnetic substrates. Among them, the BSA-imprinted microspheres based on thiol-ene-MA conjugates (MA referred as 3-morpholinopropylamine) not only exhibited remarkable rebinding ability (adsorption capacity: 209.22 mg/g, imprinting factor: 4.59) and efficient saturation adsorption (30 min), but also presented satisfactory selectivity in the individual and competitive protein samples. Assisted with thiol-ene-amine conjugation, the elaborate magnetic imprinted materials for specific separating target macromols. hold great promising in applications. The experimental process involved the reaction of 2-(2-(Vinyloxy)ethoxy)ethanol(cas: 929-37-3).Computed Properties of 929-37-3

The Article related to thiolactone conjugation magnetic imprinted microsphere capturing target protein, Biochemical Methods: Miscellaneous Separations (Not Covered At Other Subsections) and other aspects.Computed Properties of 929-37-3

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