Category: ethers-buliding-blocks

Isobaric vapor-liquid equilibrium of water + glymes binary mixtures: Experimental measurements and molecular thermodynamic modelling was written by Crespo, Emanuel A.;Chouireb, Naima;Igoudjilene, O. Tafat;Vega, Lourdes F.;Carvalho, Pedro J.;Coutinho, Joao A. P.. And the article was included in Fluid Phase Equilibria in 2020.Name: 2,5,8,11-Tetraoxadodecane This article mentions the following:

In this work, new exptl. data on the isobaric vapor-liquid equilibrium (VLE) of binary aqueous systems, with six different glycol ethers (glymes), some of which are currently used in the Selexol process, were measured at three different pressures, namely 0.05, 0.07, and 0.1 MPa. From the exptl. data, the water activity coefficients were estimated using the modified Raoult’s law and used to infer about the effect of the glymes structure on their interactions with water. Moreover, using a coarse-grain mol. model previously proposed in the framework of the soft-SAFT equation of state (EoS) for both glycols and glymes, the exptl. data were successfully correlated with a single state-independent binary interaction parameter and average absolute deviations from the exptl. data of 1.30 K. Furthermore, the model was used in a predictive manner to obtain the water activity coefficients in the whole composition range, providing useful insights into the systems non-ideality. In the experiment, the researchers used many compounds, for example, 2,5,8,11-Tetraoxadodecane (cas: 112-49-2Name: 2,5,8,11-Tetraoxadodecane).

2,5,8,11-Tetraoxadodecane (cas: 112-49-2) 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. 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.Name: 2,5,8,11-Tetraoxadodecane

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

Nonlinear Optical Chemosensor for Sodium Ion Based on Rhodol Chromophore was written by Poronik, Yevgen M.;Clermont, Guillame;Blanchard-Desce, Mireille;Gryko, Daniel T.. And the article was included in Journal of Organic Chemistry in 2013.HPLC of Formula: 66943-05-3 This article mentions the following:

As part of a strategy to identify good fluorescent probes based on two-photon excited fluorescence (TPEF), the sensor for sodium cation was designed bearing a rhodol chromophore linked with an aza-crown ether. An efficient synthetic route to rhodol derivatives possessing five-membered heterocycles at position 9 and their precursors that contain xanthylium salt was developed. The synthesis involves condensation of xanthylium salts bearing vinamidinium moiety at position 9, with phenylhydrazine derivatives as the key step. To accomplish the synthesis of derivatives bearing 1-aza-15-crown-5 and 1,10-diaza-18-crown-6, the Buchwald-Hartwig reaction was employed in the final stage. Electronic spectra of all prepared rhodols display strong absorption at 450-550 nm with well-resolved vibronic bands, which maintains its fine structure in a wide range of solvents. The most intensive two-photon absorption (2PA) band in the rhodol spectrum (165 GM), located at shorter wavelengths, matches well with the short-wavelength absorption band in the linear electronic spectrum and is most probably related to the two-photon allowed electronic transition S₀→S₂. The influence of cation binding on 1- and two-photon spectroscopic properties of rhodol linked with 1-aza-15-crown-5 via the phenylpyrazole bridge was studied. This probe exhibits high sensitivity and good selectivity for Na⁺ in CH₃CN. The mechanism involves the complexation of the Na⁺ by 1-aza-15-crown-5 in the probe, which induces prominent fluorescence enhancement via quenching of electron-transfer. The complexation with Na⁺ led to a significant increase of the 2PA band in the 750-800 nm region (corresponding to a two-photon allowed, 1-photon forbidden transition) for rhodol bearing 1-aza-15-crown-5, which led to the overall enhancement of the TPEF signal (approx. an order of magnitude). Thus, a turn-on fluorescent probe for sodium ion, which does not respond to many other metal species, was constructed. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3HPLC of Formula: 66943-05-3).

1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) 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, 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. 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.HPLC of Formula: 66943-05-3

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

Prediction of upper flammability limit percent of pure compounds from their molecular structures was written by Gharagheizi, Farhad. And the article was included in Journal of Hazardous Materials in 2009.Name: 1-((1-((1-Methoxypropan-2-yl)oxy)propan-2-yl)oxy)propan-2-ol This article mentions the following:

In this study, a quant. structure-property relationship (QSPR) is presented to predict the upper flammability limit percent (UFLP) of pure compounds The obtained model is a five parameters multi-linear equation. The parameters of the model are calculated only from chem. structure. The average absolute error and squared correlation coefficient of the obtained model over all 865 pure compounds used to develop the model are 9.7%, and 0.92, resp. In the experiment, the researchers used many compounds, for example, 1-((1-((1-Methoxypropan-2-yl)oxy)propan-2-yl)oxy)propan-2-ol (cas: 20324-33-8Name: 1-((1-((1-Methoxypropan-2-yl)oxy)propan-2-yl)oxy)propan-2-ol).

1-((1-((1-Methoxypropan-2-yl)oxy)propan-2-yl)oxy)propan-2-ol (cas: 20324-33-8) 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. Electron-deficient reagents are also stabilized by ethers. For example, borane (BH3) is a useful reagent for making alcohols. Pure borane exists as its dimer, diborane (B2H6), a toxic gas that is inconvenient and hazardous to use. Borane forms stable complexes with ethers, however, and it is often supplied and used as its liquid complex with tetrahydrofuran (THF).Name: 1-((1-((1-Methoxypropan-2-yl)oxy)propan-2-yl)oxy)propan-2-ol

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

Design and synthesis of new tripeptide-type SARS-CoV 3CL protease inhibitors containing an electrophilic arylketone moiety was written by Konno, Sho;Thanigaimalai, Pillaiyar;Yamamoto, Takehito;Nakada, Kiyohiko;Kakiuchi, Rie;Takayama, Kentaro;Yamazaki, Yuri;Yakushiji, Fumika;Akaji, Kenichi;Kiso, Yoshiaki;Kawasaki, Yuko;Chen, Shen-En;Freire, Ernesto;Hayashi, Yoshio. And the article was included in Bioorganic & Medicinal Chemistry in 2013.Application In Synthesis of 2-(4-Methoxyphenoxy)acetic acid This article mentions the following:

We describe here the design, synthesis and biol. evaluation of a series of mols. toward the development of novel peptidomimetic inhibitors of SARS-CoV 3CL^pro. A docking study involving binding between the initial lead compound (I) and the SARS-CoV 3CL^pro motivated the replacement of a thiazole with a benzothiazole unit as a warhead moiety at the P1′ site. This modification led to the identification of more potent derivatives, including (II) (R¹ = R₂ = H; R¹ = OMe, R² = H; R¹ = H, R² = OMe; R¹ = NMe₂, H² = H; R¹ = H, R² = NMe2), with IC₅₀ or K_i values in the submicromolar to nanomolar range. In particular, compounds II (R¹ = R² = H; R¹ = H, R² = NMe₂) exhibited the most potent inhibitory activities, with K_i values of 4.1 and 3.1 nM, resp. The peptidomimetic compounds identified through this process are attractive leads for the development of potential therapeutic agents against SARS. The structural requirements of the peptidomimetics with potent inhibitory activities against SARS-CoV 3CL^pro may be summarized as follows: (i) the presence of a benzothiazole warhead at the S1′-position; (ii) hydrogen bonding capabilities at the cyclic lactam of the S1-site; (iii) appropriate stereochem. and hydrophobic moiety size at the S2-site and (iv) a unique folding conformation assumed by the phenoxyacetyl moiety at the S4-site. In the experiment, the researchers used many compounds, for example, 2-(4-Methoxyphenoxy)acetic acid (cas: 1877-75-4Application In Synthesis of 2-(4-Methoxyphenoxy)acetic acid).

2-(4-Methoxyphenoxy)acetic acid (cas: 1877-75-4) belongs to ethers. 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. 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.Application In Synthesis of 2-(4-Methoxyphenoxy)acetic acid

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

Effective 3D open-channel nanostructures of a MgMn₂O₄ positive electrode for rechargeable Mg batteries operated at room temperature was written by Sone, Kazuki;Hayashi, Yoshihiro;Mandai, Toshihiko;Yagi, Shunsuke;Oaki, Yuya;Imai, Hiroaki. And the article was included in Journal of Materials Chemistry A: Materials for Energy and Sustainability in 2021.COA of Formula: C8H18O4 This article mentions the following:

Room-temperature operations of rechargeable Mg coin-cell batteries have been achieved using a Mg alloy neg. electrode and a spinel MgMn₂O₄ (MMO)-pos. electrode. The present work focuses on clarifying the effects of the physiochem. properties of the MMO powder including the sp. surface area (SBET) and porosity of the pos. electrode on Mg battery performances in practical applications. Finally, optimal sp. surface area and porosity parameters were obtained that ensured excellent battery performances as a standard coin-cell at room temperature A typical MMO powder synthesized using a modified sol-gel method with propylene oxide-driven complex polymerization had a large SBET > 200 m² g^-1, and more than 90% porosity with a triple-tiered 3D open-channel network. Here we evaluated the discharge capacity and the cyclability for room-temperature operation as a function of SBET in a full cell with a Mg neg. electrode as well as half cells with a carbon graphite electrode. Irresp. of whether half cells or a full cell was used, the initial discharge capacity was found to depend linearly on the SBET of the porous MMO powder in a Mg tetrakis(hexafluoroisopropyl)borate/triglyme electrolyte with a wide potential window, ΔE > 3.6 V. Eventually, the maximum discharge capacity of 220 mA h g^-1 was realized at 25°C in the full cell using the 3D open-channel nanostructure with SBET = 236 m2 g^-1. The cyclability in the full cell with the Mg alloy neg. electrode, however, degraded with the increasing SBET, while no cyclability degradation was observed in the half cell with the carbon electrode. A possible mechanism is discussed regarding passivation of the Mg alloy electrode in discharge/charge cycles. In the experiment, the researchers used many compounds, for example, 2,5,8,11-Tetraoxadodecane (cas: 112-49-2COA of Formula: C8H18O4).

2,5,8,11-Tetraoxadodecane (cas: 112-49-2) 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. Electron-deficient reagents are also stabilized by ethers. For example, borane (BH3) is a useful reagent for making alcohols. Pure borane exists as its dimer, diborane (B2H6), a toxic gas that is inconvenient and hazardous to use. Borane forms stable complexes with ethers, however, and it is often supplied and used as its liquid complex with tetrahydrofuran (THF).COA of Formula: C8H18O4

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

Novel synthetic LPDs consisting of different cholesterol derivatives for gene transfer into hepatocytes was written by Lu, Jiao;Zhu, Di;Zhang, Zhi-Rong;Hai, Li;Wu, Yong;Sun, Xun. And the article was included in Journal of Drug Targeting in 2010.Recommanded Product: 2-(2-(2-((Tetrahydro-2H-pyran-2-yl)oxy)ethoxy)ethoxy)ethan-1-ol This article mentions the following:

In the present study, LPDs composing of a series of novel synthetic cholesterylated derivatives bearing a cluster of galactose residues and different spacer lengths were prepared for performing target gene delivery to hepatocytes and their physiochem. properties as well as gene transfer efficiency were investigated. In agreement with the “clustering effect” known to occur with more complex oligomeric structures, the addition of galactose residues under optimized spatial arrangement condition invariably increased the transfect efficiency into hepatoma cells, which can be owed to the sufficient binding of galactose ligands to the ASGPR on hepatocytes. However, the gene transfer ability to hepatocytes was not always improved with extended spacer arms, suggesting a spatial binding sites arrangement of the receptor. Moreover, the authors’ research has established galactosylated LPDs, specifically, LPDIIb, LPDIIIc, and LPDIVe as potential vectors to deliver special genes into hepatocytes with low toxicity, combining the condensing effect of protamine and the targeting capability of cholesterylated thiogalactosides. In the experiment, the researchers used many compounds, for example, 2-(2-(2-((Tetrahydro-2H-pyran-2-yl)oxy)ethoxy)ethoxy)ethan-1-ol (cas: 60221-37-6Recommanded Product: 2-(2-(2-((Tetrahydro-2H-pyran-2-yl)oxy)ethoxy)ethoxy)ethan-1-ol).

2-(2-(2-((Tetrahydro-2H-pyran-2-yl)oxy)ethoxy)ethoxy)ethan-1-ol (cas: 60221-37-6) 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 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.Recommanded Product: 2-(2-(2-((Tetrahydro-2H-pyran-2-yl)oxy)ethoxy)ethoxy)ethan-1-ol

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

QSAR analysis of the antiherpetic activity of macroheterocyclic compounds and their structural analogs was written by Artemenko, A. G.;Liahovskiy, A. V.;Muratov, E. N.;Basok, S. S.;Lozitsky, V. P.;Fedchuk, A. S.;Gridina, T. V.;Kuz’min, V. E.. And the article was included in Dopovidi Natsional’noi Akademii Nauk Ukraini in 2010.Formula: C10H21NO4 This article mentions the following:

The anal. of the structure-antiherpetic activity relationship for nitroqen-containing cyclic compounds with the usage of QSAR methods on the basis of the simplex representation of a mol. structure and the circular model has been carried out. Structural factors which are responsible for the antiherpetic activity realization are determined on the basis of the interpretation of the developed adequate models. Several highly active compounds have been designed on the basis of this information. The high antiherpetic activity for three of them is confirmed exptl. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3Formula: C10H21NO4).

1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) 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. The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom. Complexation of the magnesium atom stabilizes the Grignard reagent and helps to keep it in solution.Formula: C10H21NO4

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

Enabling the biosynthesis of Antroquinonol in submerged fermentation of Antrodia camphorata was written by Hu, Yong-Dan;Zhang, Huan;Lu, Rui-Qiu;Liao, Xiang-Ru;Zhang, Bo-Bo;Xu, Gan-Rong. And the article was included in Biochemical Engineering Journal in 2014.Application In Synthesis of 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione This article mentions the following:

In recent years, Antroquinonol has been considered as one of the most potent bioactive components in the medicinal mushroom Antrodia camphorata. However, Antroquinonol could not be produced via conventional submerged fermentation of A. camphorata. In this study, the biosynthesis of Antroquinonol was successfully enabled and stimulated in the submerged fermentation by the addition of its precursors including p-hydroxybenzoic acid, geraniol and coenzyme Q₀. Referred to their structures, they involve in the biosynthesis of the quinonoid nucleus and polyprenyl side chain of Antroquinonol, resp. Moreover, the appropriate concentration and addition time of these precursors were systematically studied. The maximum production of Antroquinonol could be achieved at 82.22 ± 0.49 mg/L with the multiple additions of coenzyme Q₀ and p-hydroxybenzoic acid. This study demonstrated the bioprocess regulation of Antroquinonol production, which will be of great significance for the scientific study of A. camphorata. In the experiment, the researchers used many compounds, for example, 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione (cas: 605-94-7Application In Synthesis 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. But on the other hand, ethers undergo cleavage by reaction with acids. 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.Application In Synthesis of 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione

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

Solvent-, Silver-, and Acid-Free NHC-Au-X Catalyzed Hydration of Alkynes. The Pivotal Role of the Counterion was written by Gatto, Mattia;Belanzoni, Paola;Belpassi, Leonardo;Biasiolo, Luca;DelZotto, Alessandro;Tarantelli, Francesco;Zuccaccia, Daniele. And the article was included in ACS Catalysis in 2016.SDS of cas: 16356-02-8 This article mentions the following:

NHC-Au-X (NHC = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene, X^– = BArF^–, BF₄^–, SbF₆^–, OTf^–, NTf₂^–, ClO₄^–, OTs^–, TFA^–) catalysts were tested in the hydration of alkynes. A complete rationalization of the counterion effect enabled us to develop a highly efficient methodol. under solvent-, silver-, and acid-free conditions. Thus, it was possible to use room or mild (60 °C) temperature and to reduce the catalyst loading up to 0.01 mol % with respect to the substrate, leading to high TON (10⁴) and TOF (10³ h^-1) values. The favorable catalytic conditions allowed us to reach very low E factor (0.03-0.06) and high EMY (94-97) values. Finally, the absence of solvent permits easy separation of the liquid product from solid catalyst and ionic additives by distillation, giving products with high purity that are uncontaminated by metals. This opens the way to catalyst recycling (up to four times) without loss of activity. The overall catalytic and kinetic evidence, supported by computational results, confirms that the anion plays a crucial role in all steps of the reaction mechanism: pre-equilibrium, nucleophilic attack, and protodeauration. As a matter of fact, only the two complexes bearing OTf^– and NTf₂^– counterions showed catalytic activity; all others are completely inactive. Protodeauration is the rate-determining step under these aprotic and apolar conditions, and in calculations, the first anion-mediated proton transfer takes place easily in one step, leading to a gold-enol complex. Different pathways were computationally explored for the conversion of gold-enol to ketone product by modeling different exptl. conditions. In the experiment, the researchers used many compounds, for example, 1,4-Dimethoxy-2-butyne (cas: 16356-02-8SDS of cas: 16356-02-8).

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. Electron-deficient reagents are also stabilized by ethers. For example, borane (BH3) is a useful reagent for making alcohols. Pure borane exists as its dimer, diborane (B2H6), a toxic gas that is inconvenient and hazardous to use. Borane forms stable complexes with ethers, however, and it is often supplied and used as its liquid complex with tetrahydrofuran (THF).SDS of cas: 16356-02-8

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

Pd-Catalyzed Intermolecular ortho-C-H Amidation of Anilides by N-Nosyloxycarbamate was written by Ng, Ka-Ho;Chan, Albert S. C.;Yu, Wing-Yiu. And the article was included in Journal of the American Chemical Society in 2010.Recommanded Product: N-(3-Methoxyphenyl)pivalamide This article mentions the following:

A palladium-catalyzed ortho-C-H amidation of anilides by N-nosyloxycarbamates was developed for the synthesis of 2-aminoanilines. This reaction can be carried out under relatively mild conditions and exhibits excellent regioselectivity and functional group tolerance. The amidation reaction is probably initiated by rate-limiting C-H cyclopalladation (k_H/k_D = 3.7) to form an arylpalladium complex, followed by nitrene functionalization. In the experiment, the researchers used many compounds, for example, N-(3-Methoxyphenyl)pivalamide (cas: 56619-93-3Recommanded Product: N-(3-Methoxyphenyl)pivalamide).

N-(3-Methoxyphenyl)pivalamide (cas: 56619-93-3) 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.Recommanded Product: N-(3-Methoxyphenyl)pivalamide

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