Month: November 2022

On September 7, 2021, Saquib, Mohammad; Baig, Mohammad Hassan; Khan, Mohammad Faheem; Azmi, Sarfuddin; Khatoon, Shahnaaz; Rawat, Arun Kumar; Dong, Jae June; Asad, Mohammad; Arshad, Md.; Hussain, Mohd Kamil published an article.Computed Properties of 578-58-5 The title of the article was Design and Synthesis of Bioinspired Benzocoumarin-Chalcones Chimeras as Potential Anti-Breast Cancer Agents. And the article contained the following:

The design and synthesis of a library of natural product inspired benzocoumarin-chalcones chimeras, as potent and selective, novel, anti-breast cancer scaffold, is reported herein. Twenty-one new chimeric mols., 25-45, were synthesized through an efficient protocol involving the Horner-Wadsworth-Emmons-olefination of β-aryl-β-ketophosphonates with 4-formyl-2H-benzo[h]chromen-2-ones as the key step, and evaluated for anti-proliferative activity against a panel of four breast cancer and related cell lines viz. MDA-MB-231 (ER-ve), MCF-7 (ER+ve), Ishikawa (endometrial cancer) and Hela (cervical cancer). The synthesized mols. showed in vitro anti-proliferative activity in a range of 7.42 to 74.68 μM (IC50). Compounds 33 and 34 showed very good activity, with 34 exhibiting better activity than the standard drugs, tamoxifen and raloxifene. Interestingly, none of the compounds showed cytotoxity against the normal human cell line. To identify the possible targets of the active compounds, mol. docking anal. was conducted to correlate their interaction with the ERα and ERβ receptors. From among the active compounds the docked conformations of 34, at the ERα and ERβ active sites, showed that it fits most favorably in the ligand binding space and shows hydrophobic interactions with the salient residues. Based on the above findings, 34 was identified as a lead mol. for development of more potent anti-breast cancer agents. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).Computed Properties of 578-58-5

The Article related to bioinspired benzocoumarin chalcone chimera antibreast cancer agent, Placeholder for records without volume info and other aspects.Computed Properties of 578-58-5

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Ether – Wikipedia,
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On September 18, 2020, Grimm, Christopher; Lazzarotto, Mattia; Pompei, Simona; Schichler, Johanna; Richter, Nina; Farnberger, Judith E.; Fuchs, Michael; Kroutil, Wolfgang published an article.Safety of 1,2-Dimethoxybenzene The title of the article was Oxygen-free regioselective biocatalytic demethylation of methyl-ph ethers via methyltransfer employing veratrol-O-demethylase. And the article contained the following:

The cleavage of aryl Me ethers is a common reaction in chem. requiring rather harsh conditions; consequently, it is prone to undesired reactions and lacks regioselectivity. Nevertheless, O-demethylation of aryl Me ethers is a tool to valorize natural and pharmaceutical compounds by deprotecting reactive hydroxyl moieties. Various oxidative enzymes are known to catalyze this reaction at the expense of mol. oxygen, which may lead in the case of phenols/catechols to undesired side reactions (e.g., oxidation, polymerization). Here an oxygen-independent demethylation via Me transfer is presented employing a cobalamin-dependent veratrol-O-demethylase (vdmB). The biocatalytic demethylation transforms a variety of aryl Me ethers with two functional methoxy moieties either in 1,2-position or in 1,3-position. Biocatalytic reactions enabled, for instance, the regioselective monodemethylation of substituted 3,4-dimethoxy phenol as well as the monodemethylation of 1,3,5-trimethoxybenzene. The methyltransferase vdmB was also successfully applied for the regioselective demethylation of natural compounds such as papaverine and rac-yatein. The approach presented here represents an alternative to chem. and enzymic demethylation concepts and allows performing regioselective demethylation in the absence of oxygen under mild conditions, representing a valuable extension of the synthetic repertoire to modify pharmaceuticals and diversify natural products. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Safety of 1,2-Dimethoxybenzene

The Article related to biocatalytic demethylation methyl phenyl ether veratrol demethylase, Placeholder for records without volume info and other aspects.Safety of 1,2-Dimethoxybenzene

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Ether – Wikipedia,
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Hullar, Ted; Tran, Theo; Chen, Zekun; Bononi, Fernanda; Palmer, Oliver; Donadio, Davide; Anastasio, Cort published an article in 2022, the title of the article was Enhanced photodegradation of dimethoxybenzene isomers in/on ice compared to in aqueous solution.HPLC of Formula: 91-16-7 And the article contains the following content:

Photochem. reactions of contaminants in snow and ice can be important sinks for organic and inorganic compounds deposited onto snow from the atm. and sources for photoproducts released from snowpacks into the atm. Snow contaminants can be found in the bulk ice matrix, in internal liquid-like regions (LLRs), or in quasi-liquid layers (QLLs) at the air-ice interface, where they can readily exchange with the firn air. Some studies have reported that direct photochem. reactions occur faster in LLRs and QLLs than in aqueous solution, while others have found similar rates. Here, we measure the photodegradation rate constants for loss of the three dimethoxybenzene isomers under varying exptl. conditions, including in aqueous solution, in LLRs, and at the air-ice interface of nature-identical snow. Relative to aqueous solution, we find modest photodegradation enhancements (3- and 6-fold) in LLRs for two of the isomers and larger enhancements (15- to 30-fold) at the air-ice interface for all three isomers. We use computational modeling to assess the impact of light absorbance changes on photodegradation rate enhancements at the interface. We find small (2-5 nm) bathochromic (red) absorbance shifts at the interface relative to in solution, which increases light absorption, but this factor only accounts for less than 50% of the measured rate constant enhancements. The major factor responsible for photodegradation rate enhancements at the air-ice interface appears to be more efficient photodecay: estimated dimethoxybenzene quantum yields are 6- to 24-fold larger at the interface compared to in aqueous solution and account for the majority (51%-96%) of the observed enhancements. Using a hypothetical model compound with an assumed Gaussian-shaped absorbance peak, we find that a shift in the peak to higher or lower wavelengths can have a minor to substantial impact on photodecay rate constants, depending on the original location of the peak and the magnitude of the shift. Changes in other peak properties at the air-ice interface, such as peak width and height (i.e., molar absorption coefficient), can also impact rates of light absorption and direct photodecay. Our results suggest our current understanding of photodegradation processes underestimates the rate at which some compounds are broken down, as well as the release of photoproducts into the atm. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).HPLC of Formula: 91-16-7

The Article related to dimethoxybenzene isomer ice snow quantum yield photochem degradation, Air Pollution and Industrial Hygiene: Other and other aspects.HPLC of Formula: 91-16-7

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

Hullar, Ted; Tran, Theo; Chen, Zekun; Bononi, Fernanda; Palmer, Oliver; Donadio, Davide; Anastasio, Cort published an article in 2022, the title of the article was Enhanced photodegradation of dimethoxybenzene isomers in/on ice compared to in aqueous solution.Related Products of 150-78-7 And the article contains the following content:

Photochem. reactions of contaminants in snow and ice can be important sinks for organic and inorganic compounds deposited onto snow from the atm. and sources for photoproducts released from snowpacks into the atm. Snow contaminants can be found in the bulk ice matrix, in internal liquid-like regions (LLRs), or in quasi-liquid layers (QLLs) at the air-ice interface, where they can readily exchange with the firn air. Some studies have reported that direct photochem. reactions occur faster in LLRs and QLLs than in aqueous solution, while others have found similar rates. Here, we measure the photodegradation rate constants for loss of the three dimethoxybenzene isomers under varying exptl. conditions, including in aqueous solution, in LLRs, and at the air-ice interface of nature-identical snow. Relative to aqueous solution, we find modest photodegradation enhancements (3- and 6-fold) in LLRs for two of the isomers and larger enhancements (15- to 30-fold) at the air-ice interface for all three isomers. We use computational modeling to assess the impact of light absorbance changes on photodegradation rate enhancements at the interface. We find small (2-5 nm) bathochromic (red) absorbance shifts at the interface relative to in solution, which increases light absorption, but this factor only accounts for less than 50% of the measured rate constant enhancements. The major factor responsible for photodegradation rate enhancements at the air-ice interface appears to be more efficient photodecay: estimated dimethoxybenzene quantum yields are 6- to 24-fold larger at the interface compared to in aqueous solution and account for the majority (51%-96%) of the observed enhancements. Using a hypothetical model compound with an assumed Gaussian-shaped absorbance peak, we find that a shift in the peak to higher or lower wavelengths can have a minor to substantial impact on photodecay rate constants, depending on the original location of the peak and the magnitude of the shift. Changes in other peak properties at the air-ice interface, such as peak width and height (i.e., molar absorption coefficient), can also impact rates of light absorption and direct photodecay. Our results suggest our current understanding of photodegradation processes underestimates the rate at which some compounds are broken down, as well as the release of photoproducts into the atm. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Related Products of 150-78-7

The Article related to dimethoxybenzene isomer ice snow quantum yield photochem degradation, Air Pollution and Industrial Hygiene: Other and other aspects.Related Products of 150-78-7

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

On December 9, 2020, Qian, Yunyang; Li, Dandan; Han, Yulan; Jiang, Hai-Long published an article.Name: 1,4-Dimethoxybenzene The title of the article was Photocatalytic Molecular Oxygen Activation by Regulating Excitonic Effects in Covalent Organic Frameworks. And the article contained the following:

Excitonic effects caused by Coulomb interactions between electrons and holes play subtle and significant roles on photocatalysis, yet have been long ignored. Herein, porphyrinic covalent organic frameworks (COFs, specifically DhaTph-M), in the absence or presence of different metals in porphyrin centers, have been shown as ideal models to regulate excitonic effects. Remarkably, the incorporation of Zn2+ in the COF facilitates the conversion of singlet to triplet excitons, whereas the Ni2+ introduction promotes the dissociation of excitons to hot carriers under photoexcitation. Accordingly, the discriminative excitonic behavior of DhaTph-Zn and DhaTph-Ni enables the activation of O2 to 1O2 and O2•-, resp., under visible light irradiation, resulting in distinctly different activity and selectivity in photocatalytic terpinene oxidation Benefiting from these results, DhaTph-Ni exhibits excellent photocatalytic activity in O2•–engaged hydroxylation of boronic acid, while DhaTph-Zn possesses superior performance in 1O2-mediated selective oxidation of organic sulfides. This work provides in-depth insights into mol. oxygen activation and opens an avenue to the regulation of excitonic effects based on COFs. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Name: 1,4-Dimethoxybenzene

The Article related to photocatalytic mol oxygen activation regulating excitonic effect cof, Placeholder for records without volume info and other aspects.Name: 1,4-Dimethoxybenzene

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

On November 5, 2021, Liao, Peisen; Feng, Xiying; Fang, Haobin; Yang, Zujin; Zhang, Jianyong published an article.Name: 1,4-Dimethoxybenzene The title of the article was Stabilized nanotube and nanofiber gel materials toward multifunctional adsorption. And the article contained the following:

Incorporation of multiple functional mols. with unique structures can endow gel materials with outstanding performance in adsorption. Herein, self-assembly of structurally simple trispyridine mols. of 1,3,5-tris(4-pyridylmethoxyl)benzene achieves supramol. gels with two different nanofiber or nanotube morphologies depending on difference in gelation temperature and cooling rate, and the self-assembled materials have been successfully stabilized though covalent capture to obtain stable nanofiber and nanotube materials with addnl. pillar[5]arene groups. Owing to the pos. charged pyridinium networks, host-guest interaction of pillar[5]arene and different morphologies, the materials show diverse multifunctional adsorption performance, including selective uptake for cationic dye, mol. shape recognition for dinitrobenzene isomers, and remarkable adsorption for iodine capture. The tubular material shows boosted iodine adsorption via synergistic effect, and the capacity for iodine reaches up to 2.29 g g-1 via vapor adsorption and 2.95 g g-1 in solution The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Name: 1,4-Dimethoxybenzene

The Article related to stabilized nanotube nanofiber gel material multifunctional adsorption, Placeholder for records without volume info and other aspects.Name: 1,4-Dimethoxybenzene

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Ether – Wikipedia,
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On January 15, 2021, Zhang, Yun-Fei; Wang, Zhong-Hui; Yao, Xiao-Qiang; Zhang, You-Ming; Wei, Tai-Bao; Yao, Hong; Lin, Qi published an article.HPLC of Formula: 150-78-7 The title of the article was Novel tripodal-pillar[5]arene-based chemical sensor for efficient detection and removal paraquat by synergistic effect. And the article contained the following:

Paraquat (PQ) plays a vital role in pesticide field, however, PQ always threatenhuman health owing to its high toxicity. Efficient detection and removal of PQ is an important and challenging task. Herein, a novel tripodal tri-pillar[5]arene-based sensor mol. (TP5) has been designed and synthesized. Interestingly, the designed tripodal tri-pillar[5]arene structure could offer a “synergistic effect” for the binding of PQ and achieve the fluorescence sensing. Through the “synergistic effect”, two adjacent pillar[5]arene groups in each TP5 mol. could bind one PQ mol. by multi-non-covalent interactions. Based on the “synergistic effect”, the sensor mol. TP5 has better sensing and removal efficiency toward PQ. The TP5 shows sensitivity fluorescence response for PQ and its lowest of detection limit (LOD) was 2.23 x 10-7 M. Meanwhile, TP5-based test paper has been prepared, which could serve as a convenient and efficient test kit to detect PQ in water and the concentration range is 10-6 M ∼ 10-1 M in practical situations. Furthermore, the TP5 displayed the excellent ability for PQ adsorption in water. For example, the TP5 was applied to absorb com. pesticide paraquat (PQ), the adsorption efficiency for PQ was up to 98.40 %. It is worth mentioning that, benefited from the “synergistic effect”, the TP5 shows better adsorption property than activated charcoal and most single pillar[n]arene based adsorption materials. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).HPLC of Formula: 150-78-7

The Article related to tripodal pillar arene paraquat chemosensor synergism adsorption removal, Placeholder for records without volume info and other aspects.HPLC of Formula: 150-78-7

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

On January 10, 2022, Starace, Anne K.; Lee, David D.; Hietala, Kristen T.; Kim, Yeonjoon; Kim, Seonah; Harman-Ware, Anne E.; Carpenter, Daniel L. published an article.HPLC of Formula: 91-16-7 The title of the article was Predicting Catalytic Pyrolysis Aromatic Selectivity from Pyrolysis Vapor Composition Using Mass Spectra Coupled with Statistical Analysis. And the article contained the following:

The behavior of fast pyrolysis (FP) and catalytic FP (CFP) of 20 renewable feedstocks was studied in a microscale reactor with mol. beam mass spectral anal. of products generated. A partial least-squares (PLS) model was constructed based on the FP vapor spectra that predicts the aromatic selectivity when upgrading over a ZSM-5 catalyst. Addnl., principal component anal. of both FP and CFP spectra was performed for comprehensive spectral anal. This work highlighted the value of vapor-phase mass spectral screening to predict the subsequent feedstock performance and demonstrated that the quantity of coke deposited on the catalyst is not a reliable measure of catalyst deactivation when the feedstock type is varied. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).HPLC of Formula: 91-16-7

The Article related to catalytic pyrolysis aromatic compound mass spectra statistical analysis, Placeholder for records without volume info and other aspects.HPLC of Formula: 91-16-7

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

Ou, Guangchuan; Wang, Qiong; Zhou, Qiang; Wang, Xiaofeng published an article in 2021, the title of the article was Phenol derivatives as Co-crystallized templates to modulate trimesic-acid-based hydrogen-bonded organic molecular frameworks.COA of Formula: C8H10O2 And the article contains the following content:

Five host-guest trimesic-acid-based hydrogen-bonds framework compounds with different guests, namely [(TMA)4·(TMB)3] (1), [(TMA)2·(DMB)1.5] (2), [(TMA)6·(MP)] (3), [(TMA)·(EP)] (4) and [(TMA)·(PP)] (5) (TMA = trimesic acid, TMB = 1,3,5-trimethoxybenzene, DMB = 1,4- dimethoxybenzene, MP = 4-methoxyphenol, EP = 4-ethoxyphenol and PP = 4-propoxyphenol), were obtained through co-crystallization, and were characterized by elemental anal., IR spectroscopy anal., and thermogravimetric anal. The trimesic acid mols. comprise a hydrogen bonding six-membered cyclic host network that is found in a two-dimensional arrangement in compounds 1 and 2, and in a nine-fold interpenetrated three-dimensional structure in compound 3. In compounds 4 and 5, the trimesic acid and EP/PP mols. form a hydrogenbonded six-membered cyclic network, resulting in a one-dimensional chain structure through O-H…O hydrogen bonds. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).COA of Formula: C8H10O2

The Article related to phenol trimesic acid hydrogen bond organic mol framework crystallization, Placeholder for records without volume info and other aspects.COA of Formula: C8H10O2

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

On August 1, 2021, Xu, Dongxiao; Cao, Ziyi; Ye, Zhuolin; Zhang, Hong; Wang, Lipeng; John, Matz; Dong, Pei; Gao, Shangpeng; Shen, Jianfeng; Ye, Mingxin published an article.Electric Literature of 91-16-7 The title of the article was Electrochemical oxidation of π-π coupling organic cathode for enhanced zinc ion storage. And the article contained the following:

Organic materials typically present low rate performance and limited cycling durability due to the structural destruction and dissolution during electrochem. processes, which greatly hinders their application as promising cathodes for aqueous rechargeable zinc-ion batteries (ZIBs). Here, a strategy of in situ electrochem. oxidation with π-π interaction coupling between graphene and 2,3,6,7,10,11-Hexahydroxytriphenylene (HHTP) stabilizes the composite structure, rendering it a very promising organic composite cathode (named as GH) for ZIBs. More explicitly, the hydroxyl groups of HHTP are in-situ electrochem. transformed into carbonyl groups to form the redox-active sites, in which π-π interactions with graphene urges the highly reversible coordination/incoordination between zinc ions and the GH cathode. Further, such a GH cathode shows a specific capacity of 225 mAh g-1 at 0.05 A g-1 with a high capacity retention of 90% at 10 A g-1 after 7000 cycles, demonstrating high rate and cycle stability are achieved during the discharge/charge process. Thereby, this work provides a novel strategy for engineering an organic composite cathode which corrects the low rate and unstable cycling property for effective use in ZIBs. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Electric Literature of 91-16-7

The Article related to enhanced zinc ion storage electrochem oxidation coupling organic cathode, Placeholder for records without volume info and other aspects.Electric Literature of 91-16-7

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