Category: ethers-buliding-blocks

Polysubstituted Pyrimidines as mPGES-1 Inhibitors: Discovery of Potent Inhibitors of PGE₂ Production with Strong Anti-inflammatory Effects in Carrageenan-Induced Rat Paw Edema was written by Kalcic, Filip;Kolman, Viktor;Ajani, Haresh;Zidek, Zdenek;Janeba, Zlatko. And the article was included in ChemMedChem in 2020.Formula: C14H15BO4 This article mentions the following:

We report an extensive structure-activity relationship optimization of polysubstituted pyrimidines that led to the discovery of 5-butyl-4-(4-benzyloxyphenyl)-6-phenylpyrimidin-2-amine, and its difluorinated analog. These compounds are sub-micromolar inhibitors of PGE₂ production (IC₅₀ as low as 12 nM). In order to identify the mol. target of anti-inflammatory pyrimidines, we performed extensive studies including enzymic assays, homol. modeling and docking. The difluorinated analog simultaneously inhibits two key enzymes of the arachidonic acid cascade, namely mPGES-1 and COX-2, with mPGES-1 inhibition being the principal mechanism of action. Other pyrimidines studied are potent mPGES-1 inhibitors with no observed inhibition of COX-1/2 enzymes. Moreover, the two most potent compounds proved to be significantly effective in vivo in a model of acute inflammation, suppressing carrageenan-induced rat paw edema by 36 and 46%. The promising results of this study warrant further preclin. evaluation of selected anti-inflammatory candidates. In the experiment, the researchers used many compounds, for example, (4-((4-Methoxybenzyl)oxy)phenyl)boronic acid (cas: 156635-90-4Formula: C14H15BO4).

(4-((4-Methoxybenzyl)oxy)phenyl)boronic acid (cas: 156635-90-4) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.Formula: C14H15BO4

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

Activity and stability of uricase from Lactobacillus plantarum immobilized on natural zeolite for uric acid biosensor was written by Iswantini, Dyah;Nurhidayat, Novik;Trivadila;Widiyatmoko, Okik. And the article was included in Pakistan Journal of Biological Sciences in 2014.Related Products of 605-94-7 This article mentions the following:

Determination of uric acid concentration in human urine and blood is needed to diagnose several diseases, especially the occurrence of kidney disease in gout patients. Therefore, it is needed to develop a simple and inexpensive method for uric acid detection. The purpose of the research was to observe the use of Indonesian microbe that was immobilized on natural zeolite as a source of uricase for uric acid biosensor. Selection of mediators and determination of optimum condition measurement, the stability and kinetic properties of L. plantarum uricase were performed using carbon paste electrode. Cyclic voltammetry was employed to investigate the catalytic behavior of the biosensor. The result indicated that the best mediator for measurement of L. plantarum uricase activity was Qo (2,3-dimethoxy-5-methyl-1,4 benzoquinone). Optimum conditions for immobilization of L. plantarum uricase on zeolite were obtained at pH 7.6, with temperature of 28°C, using uric acid concentration of 0.015 mM and zeolite mass at 135 mg K_M and V_Max of L. plantarum uricase obtained from Lineweaver-burk equation for the immobilization uricase on zeolite were 8.6728 × 10^-4 mM and 6.3052 mM, resp. K_M value of L. plantarum uricase directly immobilized onto the electrode surface was smaller than K_M value of L. plantarum uricase immobilized on zeolite. The smaller K_M value shows the higher affinity toward the substrate. The electrode when kept at 10°C was stable until 6 days, however the immobilized electrode on zeolite was stable until 18 days. Therefore, Indonesian L. plantarum could be used as a uric acid biosensor. In the experiment, the researchers used many compounds, for example, 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione (cas: 605-94-7Related Products of 605-94-7).

2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione (cas: 605-94-7) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly autoxidize to form hydroperoxides and dialkyl peroxides. If concentrated or heated, these peroxides may explode. To prevent such explosions, ethers should be obtained in small quantities, kept in tightly sealed containers, and used promptly.Related Products of 605-94-7

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

Synthesis and biological evaluation of novel gigantol derivatives as potential agents in prevention of diabetic cataract was written by Wu, Jie;Lu, Chuanjun;Li, Xue;Fang, Hua;Wan, Wencheng;Yang, Qiaohong;Sun, Xiaosheng;Wang, Meiling;Hu, Xiaohong;Chen, C.-Y. Oliver;Wei, Xiaoyong. And the article was included in PLoS One in 2015.Name: 3-Hydroxy-5-methoxybenzaldehyde This article mentions the following:

As a continuation of our efforts directed towards the development of natural anti-diabetic cataract agents, gigantol was isolated from Herba dendrobii and was found to inhibit both aldose reductase (AR) and inducible nitric oxide synthase (iNOS) activity, which play a significant role in the development and progression of diabetic cataracts. To improve its bioefficacy and facilitate use as a therapeutic agent, gigantol (compound 14f) and a series of novel analogs were designed and synthesized. Analogs were formulated to have different substituents on the Ph ring (compounds 4, 5, 8, 14a-e), substitute the Ph ring with a larger steric hindrance ring (compounds 10, 17c) or modify the carbon chain (compounds 17a, 17b, 21, 23, 25). All of the analogs were tested for their effect on AR and iNOS activities and on D-galactose-induced apoptosis in cultured human lens epithelial cells. Compounds 5, 10, 14a, 14b, 14d, 14e, 14f, 17b, 17c, 23, and 25 inhibited AR activity, with IC50 values ranging from 5.02 to 288.8 μM. Compounds 5, 10, 14b, and 14f inhibited iNOS activity with IC50 ranging from 432.6 to 1188.7 μM. Compounds 5, 8, 10, 14b, 14f, and 17c protected the cells from D-galactose induced apoptosis with viability ranging from 55.2 to 76.26%. Of gigantol and its analogs, compound 10 showed the greatest bioefficacy and is warranted to be developed as a therapeutic agent for diabetic cataracts. In the experiment, the researchers used many compounds, for example, 3-Hydroxy-5-methoxybenzaldehyde (cas: 57179-35-8Name: 3-Hydroxy-5-methoxybenzaldehyde).

3-Hydroxy-5-methoxybenzaldehyde (cas: 57179-35-8) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. But ether is more polar than alkenes. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides.Name: 3-Hydroxy-5-methoxybenzaldehyde

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

Pd(II)-Catalyzed Asymmetric Annulation toward the Synthesis of 2,3-Disubstituted Chiral Indenols was written by Gu, Chang-Xue;Chen, Wen-Wen;Xu, Ming-Hua. And the article was included in Journal of Organic Chemistry in 2020.Category: ethers-buliding-blocks This article mentions the following:

An enantioselective asym. annulation of 2-formylboronic acids with internal alkynes has been realized using a chiral phosphinooxazoline/palladium(II) catalyst. The reaction tolerates a variety of alkynes including the relatively inert diaryl substituted internal ones. A wide range of optically active 2,3-disubstituted indenols was afforded in high yields with good to excellent enantioselectivities (up to 99% yield and 99% ee). In the experiment, the researchers used many compounds, for example, 1,4-Dimethoxy-2-butyne (cas: 16356-02-8Category: ethers-buliding-blocks).

1,4-Dimethoxy-2-butyne (cas: 16356-02-8) belongs to ethers. Relative to alcohols, ethers are generally less dense, are less soluble in water, and have lower boiling points. They are relatively unreactive. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.Category: ethers-buliding-blocks

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

Cobalt-catalyzed [2 + 2 + 2] cycloaddition copolymerization of diyne and internal alkyne monomers to highly branched polymers was written by Kikuta, Nana;Shindo, Takahiro;Sugiyama, Yu-ki;Yamada, Takeshi;Okamoto, Sentaro. And the article was included in Polymer in 2021.Category: ethers-buliding-blocks This article mentions the following:

A novel synthetic method for hyperbranched polymers is reported. A cobalt catalyst previously developed in our group promotes the catalytic alkyne [2 + 2 + 2] cycloaddition polymerization of aromatic diynes with internal alkynes, which proceeds without gelation or production of insoluble materials to give the corresponding soluble polymer in good yields. The method is reproducible, and the polymerization behavior can readily be predicted by the results of model reactions. Thus, the mol. weight and a degree of branching (DB) of the resulting polymer can be controlled by selecting the internal alkyne monomer and its loading amount The occurrence of effective endcapping reaction was confirmed by degradation of the polymer derived from a diyne bearing a silyl ether linker, and a high DB of more than 0.5 was obtained. In the experiment, the researchers used many compounds, for example, 1,4-Dimethoxy-2-butyne (cas: 16356-02-8Category: ethers-buliding-blocks).

1,4-Dimethoxy-2-butyne (cas: 16356-02-8) belongs to ethers. Relative to alcohols, ethers are generally less dense, are less soluble in water, and have lower boiling points. They are relatively unreactive. Ethyl ether is an excellent solvent for extractions and for a wide variety of chemical reactions. It is also used as a volatile starting fluid for diesel engines and gasoline engines in cold weather. Dimethyl ether is used as a spray propellant and refrigerant. Methyl t-butyl ether (MTBE) is a gasoline additive that boosts the octane number and reduces the amount of nitrogen-oxide pollutants in the exhaust. The ethers of ethylene glycol are used as solvents and plasticizers.Category: ethers-buliding-blocks

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

Unravelling Some of the Key Transformations in the Hydrothermal Liquefaction of Lignin was written by Lui, Matthew Y.;Chan, Bun;Yuen, Alexander K. L.;Masters, Anthony F.;Montoya, Alejandro;Maschmeyer, Thomas. And the article was included in ChemSusChem in 2017.Related Products of 6972-61-8 This article mentions the following:

Using both exptl. and computational methods, focusing on intermediates and model compounds, some of the main features of the reaction mechanisms that operate during the hydrothermal processing of lignin were elucidated. Key reaction pathways and their connection to different structural features of lignin were proposed. Under neutral conditions, subcritical water was demonstrated to act as a bifunctional acid/base catalyst for the dissection of lignin structures. In a complex web of mutually dependent interactions, guaiacyl units within lignin were shown to significantly affect overall lignin reactivity. In the experiment, the researchers used many compounds, for example, 3-(2,4-Dimethoxyphenyl)acrylic acid (cas: 6972-61-8Related Products of 6972-61-8).

3-(2,4-Dimethoxyphenyl)acrylic acid (cas: 6972-61-8) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. Ethyl ether is an excellent solvent for extractions and for a wide variety of chemical reactions. It is also used as a volatile starting fluid for diesel engines and gasoline engines in cold weather. Dimethyl ether is used as a spray propellant and refrigerant. Methyl t-butyl ether (MTBE) is a gasoline additive that boosts the octane number and reduces the amount of nitrogen-oxide pollutants in the exhaust. The ethers of ethylene glycol are used as solvents and plasticizers.Related Products of 6972-61-8

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

Non-adsorbing small molecules as auxiliary dispersants for polycarboxylate superplasticizers was written by Ilg, Manuel;Plank, Johann. And the article was included in Colloids and Surfaces, A: Physicochemical and Engineering Aspects in 2020.Category: ethers-buliding-blocks This article mentions the following:

The dispersing ability of polycarboxylate superplasticizers (PCEs) can be ascribed to the electrostatic and steric stabilization of cement suspensions. For this purpose, PCEs need to adsorb on the cement particle surface to become effective at all. In this study, it is demonstrated that at low water to cement ratios ≤ 0.30, even non-ionic mols. like diethylene glycol or 2-methyl-2,4-pentanediol which do not adsorb on cement, but remain dissolved in the interstitial pore solution, can greatly enhance cement dispersion when combined with PCEs such as conventional methacrylate ester based comb co-polymers. Their effect as co-dispersant is particularly pronounced for PCEs possessing a low side chain d. and long side chain length. Relative to the co-dispersants it was found that especially non-polar small mols. like neopentyl glycol greatly enhance the paste fluidity. These mols. significantly reduce the surface tension of the pore solution and thus increase the wettability of cement. Based on results from spread flow tests, adsorption measurements and pendant drop tensiometry it is concluded that in cementitious systems formulated at low w/c ratios, non-adsorbing mols. with a mol. weight of ≤ 1000 g/mol induce repulsive depletion forces which prevent cement particles from agglomeration. This way, such small mols. act as auxiliary or co-dispersant when combined with PCEs. In the experiment, the researchers used many compounds, for example, 2-(2-Methoxyethoxy)ethanol (cas: 111-77-3Category: ethers-buliding-blocks).

2-(2-Methoxyethoxy)ethanol (cas: 111-77-3) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. But on the other hand, ethers undergo cleavage by reaction with acids. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.Category: ethers-buliding-blocks

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

(2-Piperidine)- and (2-pyrrolidine)ethanones and -ethanols as inhibitors of blood platelets aggregation was written by Grisar, J. Martin;Claxton, George P.;Stewart, Kenneth T.;MacKenzie, Robert D.;Kariya, Takashi. And the article was included in Journal of Medicinal Chemistry in 1976.Quality Control of 1-(4-(4-Methoxyphenoxy)phenyl)ethanone This article mentions the following:

RMI 14133A [(E)-4-[4-(methylthio)phenyl]-1-(2-piperidinyl)-3-buten-2-one-HCl](I) [59999-96-1] inhibited ADP-induced aggregation of blood platelets. I was selected from a large series of (2-piperidinyl)- and (2-pyrrolidinyl)ethanones synthesized by a modified Schoepf reaction from enolate Mg salts of β-keto acids and 2,3,4,5-tetrahydropyridine trimer [27879-53-4] or 3,4-dihydro-2H-pyrrole trimer [54564-48-6], resp. Subacute toxicity evaluation in dogs and guinea pigs showed I to have an unfavorable therapeutic ratio. RMI 12436A [1-[4′-chloro(1,1′-biphenyl)-4-yl]-2-(2-piperidinyl)ethanone-HCl](II) [54916-69-7] lowered serum cholesterol [57-88-5] levels in rats with concurrent accumulation of (3β)-cholesta-5,7-dien-3-ol [434-16-2], suggesting inhibition of 7-dehydrocholesterol Δ7-reductase [9080-21-1]. In the experiment, the researchers used many compounds, for example, 1-(4-(4-Methoxyphenoxy)phenyl)ethanone (cas: 54916-28-8Quality Control of 1-(4-(4-Methoxyphenoxy)phenyl)ethanone).

1-(4-(4-Methoxyphenoxy)phenyl)ethanone (cas: 54916-28-8) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. Ethers can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.Quality Control of 1-(4-(4-Methoxyphenoxy)phenyl)ethanone

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

Side-product in methylation of 2′,4”-O-bis (trimethylsilyl) erythromycin A 9-O-(1-isopropoxycyclohexyl) oxime was written by Liang, Jianhua;Yao, Guowei. And the article was included in Zhongguo Yaowu Huaxue Zazhi in 2006.Related Products of 1132-95-2 This article mentions the following:

A side-product of methylation was identified and the influence of the reaction condition on it was investigated. The side-product was E-2′-O-trimethylsilyl-6-O-methylerythromyein A 9-O-(1-isopropoxyeyelohexyl) oxime (1). Higher temperature, longer reaction time, the addition of triethylamine, and an excessive deproton reagent would lead to the increase of 1, whereas the order of adding methylating reagents followed by deproton reagents, an excessive methylating reagent, the mixture of tetrahydrofuran/dimethyl sulfoxide (THF/DMSO) and toluene/DMSO are detrimental to the production of 1. By optimizing the reaction condition, the yield of the methylation was 100.2% with 0.76% of 1. In the experiment, the researchers used many compounds, for example, 1,1-Diisopropoxycyclohexane (cas: 1132-95-2Related Products of 1132-95-2).

1,1-Diisopropoxycyclohexane (cas: 1132-95-2) belongs to ethers. The oxygen atom in ethers are more electronegative than carbon, thus the hydrogens which are alpha to the ethers are more acidic than the simple hydrocarbons. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides.Related Products of 1132-95-2

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

Millipedes vs. pathogens: Defensive secretions of some julids (Diplopoda: Julida) as potential antimicrobial agents was written by Ilic, Bojan;Dimkic, Ivica;Unkovic, Nikola;Grbic, Milica Ljaljevic;Vukojevic, Jelena;Vujisic, Ljubodrag;Tesevic, Vele;Stankovic, Slavisa;Makarov, Slobodan;Lucic, Luka. And the article was included in Journal of Applied Entomology in 2018.Safety of 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione This article mentions the following:

In the light of growing interest in discovering new sources of natural antimicrobial agents, we extracted and tested the efficiency of julid defensive secretions in comparison with com. used antibiotic and antimycotics. This work involved chem. characterization of the defensive secretions of Cylindroiulus boleti (C. L. Koch, 1847), Megaphyllum bosniense (Verhoeff, 1897) and M. unilineatum (C. L. Koch, 1838), as well as in vitro evaluation of their antimicrobial activity against 11 bacteria, one yeast and eight filamentous fungi. Compounds of the analyzed defensive secretions included p-benzoquinones, alkyl esters of fatty acids and ketones. Ketones were recorded for the first time in the order Julida, and they were detected in secretions of both Megaphyllum species. All three analyzed defensive secretions showed antibacterial and antifungal potential against all of the tested pathogens. Staphylococcus aureus proved to be the most sensitive bacterial strain to all analyzed secretions. Also, defensive secretion of M. unilineatum showed significant antibacterial potential against Bacillus subtilis. The most resistant bacterial strains in this study were Escherichia coli,Erwinia persicina and Pseudomonas syringae pv. tomato. Analyzed defensive secretions achieved the strongest antifungal activity against Aspergillus parasiticus (secretions of all three millipede species), Penicillium griseofulvum (secretions of C. boleti and M. bosniense) and Cladosporium oxysporum (secretion of M. unilineatum). The most resistant mycromycetes were A. niger (to all tested defensive secretions), A. flavus (to secretion of M. unilineatum) and P. lanosum (to secretions of C. boleti and M. bosniense). Our results showed a generally lower level of activity compared to antibiotic and a significantly higher level compared to antimycotics. The results of this study elucidate and open opportunities for further research in the field of millipede chem. ecol. In the experiment, the researchers used many compounds, for example, 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione (cas: 605-94-7Safety of 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione).

2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione (cas: 605-94-7) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. At room temperature, ethers are pleasant-smelling colourless liquids. Relative to alcohols, ethers are generally less dense, are less soluble in water, and have lower boiling points. They are relatively unreactive, and as a result they are useful as solvents for fats, oils, waxes, perfumes, resins, dyes, gums, and hydrocarbons. Vapours of certain ethers are used as insecticides, miticides, and fumigants for soil.Safety of 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione

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