Category: ethers-buliding-blocks

Cycloaddition of Enamines with 1,4-Dimethoxy-2-butyne and 2-Butyne-1,4-diol Mediated by Titanium Tetrachloride was written by Uludag, Nesimi;Yarapsanli, Yesim;Asutay, Oktay;Gumus, Mustafa Kemal. And the article was included in Organic Preparations and Procedures International in 2018.Synthetic Route of C6H10O2 This article mentions the following:

[2 + 2]-Cycloaddition of 1,4-dimethoxy-2-butyne with, e.g., 1-morpholinocyclohexene afforded cyclobutene I when the reaction was conducted below 0° in toluene; subsequent reflux in toluene afforded the ring-expanded II. In the experiment, the researchers used many compounds, for example, 1,4-Dimethoxy-2-butyne (cas: 16356-02-8Synthetic Route of C6H10O2).

1,4-Dimethoxy-2-butyne (cas: 16356-02-8) 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.Synthetic Route of C6H10O2

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

Impact of Side Chain Chemistry on Lithium Transport in Mixed Ion-Electron-Conducting Polymers was written by Pace, Gordon;Nordness, Oscar;Asham, Kareem;Clement, Raphaele J.;Segalman, Rachel A.. And the article was included in Chemistry of Materials in 2022.Quality Control of 2-(2-Methoxyethoxy)ethanol This article mentions the following:

Typical design strategies for mixed ion-electron conduction in polymers have focused on overall ionic conductivity, without specificity for anion vs cation conduction. Here, we demonstrate that side chain chem. can be used to control Li⁺ conductivity in semiconducting polymers. This design principle is significant for applications that require Li⁺-specific transport, such as Li-ion batteries. We show that a polythiophene functionalized with an ionic liquid side chain demonstrates higher conductivity and lithium transference than a more commonly studied ether-functionalized P3AT derivative Poly(3-(6′-(N-methylimidazolium) hexyl)thiophene TFSI^–) (P3HT-Im⁺TFSI^–) can solvate and conduct ions up to salt concentrations of r = 1.0 (where r = [moles of salt]/[moles of monomer]) while achieving an ionic conductivity of ~10^-3 S/cm at 80°C and a lithium transference number of 0.36. On the other hand, poly(3-(methoxyethoxyethoxymethyl)thiophene) (P3MEEMT) shows a peak conductivity of ~10^-5 S/cm at r = 0.05 and 80°C, with near-zero lithium transport. This work shows that multiple high dielec. moieties can be used to drive ion conduction in semiconducting polymers, but diffuse, cationic side chains such as imidazolium are preferred for Li-ion conduction. In the experiment, the researchers used many compounds, for example, 2-(2-Methoxyethoxy)ethanol (cas: 111-77-3Quality Control of 2-(2-Methoxyethoxy)ethanol).

2-(2-Methoxyethoxy)ethanol (cas: 111-77-3) 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. 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.Quality Control of 2-(2-Methoxyethoxy)ethanol

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

Modeling of physico-chemical properties by topological indices was written by Katona, G.;Panea, Teodora. And the article was included in Acta Universitatis Cibiniensis, Seria F: Chemia in 2005.Recommanded Product: 1877-75-4 This article mentions the following:

A study of the quant. structure-property and structure-activity relationship QSPR/QSAR is presented for a set of aryloxyacetic acid derivatives Some QSAR properties were also calculated and correlated with topol. descriptors. As mol. descriptors the Cluj and Cluj type, Szeged and some classical indexes were used. Cluj and Szeged properties indexes considering the electronegativity, mass and 3D-geometry were also used. Some models for predicting LogP, hydration energy and Ka of the above set of acids are proposed. In the experiment, the researchers used many compounds, for example, 2-(4-Methoxyphenoxy)acetic acid (cas: 1877-75-4Recommanded Product: 1877-75-4).

2-(4-Methoxyphenoxy)acetic acid (cas: 1877-75-4) 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.Recommanded Product: 1877-75-4

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

Molecular Orbital Calculation for the Model Compounds of Kainoid Amino Acids, Agonists of Excitatory Amino Acid Receptors. Does the Kainoid C4-Substituent Directly Interact with the Receptors? was written by Hashimoto, Kimiko;Matsumoto, Takatoshi;Nakamura, Kensuke;Ohwada, Shu-ichi;Ohuchi, Tatsuro;Horikawa, Manabu;Konno, Katsuhiro;Shirahama, Haruhisa. And the article was included in Bioorganic & Medicinal Chemistry in 2002.Safety of 4-Iodo-1-methoxy-2-methylbenzene This article mentions the following:

Kainoid amino acids are agonists of the AMPA/kainate receptors and exhibit highly potent neuroexcitatory activity. From the results of extensive structure-activity relationship studies, we previously postulated that the C4-substituent of the kainoid amino acids interacts with an allosteric site of the glutamate receptor with electron-donating character. In order to investigate the mode of action in more detail, MO calculation for model compounds of the kainoid were performed. The results indicated that the HOMO energy level of the C4-substituent is involved in the potent neuroexcitatory activity, thus supporting our hypothesis. In the experiment, the researchers used many compounds, for example, 4-Iodo-1-methoxy-2-methylbenzene (cas: 75581-11-2Safety of 4-Iodo-1-methoxy-2-methylbenzene).

4-Iodo-1-methoxy-2-methylbenzene (cas: 75581-11-2) 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. 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 4-Iodo-1-methoxy-2-methylbenzene

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

Hyper-Crosslinked Porous Chiral Phosphoric Acids: Robust Solid Organocatalysts for Asymmetric Dearomatization Reactions was written by Huang, Xian-Yun;Zheng, Qingshu;Zou, Lei-Ming;Gu, Qing;Tu, Tao;You, Shu-Li. And the article was included in ACS Catalysis in 2022.Name: 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane This article mentions the following:

Knitting rigid aromatic building blocks using external crosslinkers has been developed into an effective strategy for the synthesis of porous polymers in recent years. Here, the authors report the synthesis of porous chiral phosphoric acids by this strategy. Moreover, these porous chiral phosphoric acids were found to enable highly enantioselective dearomatization reactions. Remarkably, after being reused for 10 runs, no obvious loss in catalytic activity and selectivity was observed The features of high reactivity, selectivity, stability, and recyclability of these hyper-crosslinked porous chiral phosphoric acids are significant for practical catalyst design. In the experiment, the researchers used many compounds, for example, 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 365564-07-4Name: 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane).

2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 365564-07-4) 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. But ether is more polar than alkenes. 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.Name: 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

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

The oxidation of aromatic and aliphatic oxo compounds with nitrobenzene in alkaline media was written by Kratzl, K.;Hoyos, F. E.;Silbernagel, H.. And the article was included in Monatshefte fuer Chemie in 1960.Synthetic Route of C8H8O3 This article mentions the following:

The usual oxidative degradation process in lignin chemistry to vanillin, etc. by PhNO₂ (I) was applied to model compounds Oxo compounds were oxidized to dioxo compounds which, under conditions of the benzilic acid rearrangement and eventual Cannizzaro reaction, gave hydroxy acids. Further oxidation gave oxo acids which decarboxylated to aldehydes, i.e., vanillin. PhAc derivatives maintained the C sequence as shown by labeled C atoms. Thus, 5 g. pinacolone (II), 10 g. I, and 80 ml. 2N NaOH at 165° for 3.75 hrs. gave 14% trimethyllactic acid (III). Similarly treated were (compound, temperature, time, % products given): II, 175°, 3 hrs., 49.5% III, 26% (CO₂H)₂, 0.7% of an oxo acid; cyclohexanone, 100°, 40 min., 7% 1-hydroxycyclopentanecarboxylic acid; benzylacetone, 165°, 3.5 71.8% benzyllactic acid, 4.2% of an oxo acid; phenylacetic acid, 165°, 3.75 hrs., 5.8% benzoylformic acid (IV), 7% BzOH from a second batch; PhAc, 165°, 3 hrs., 67% IV; o-hydroxyacetophenone, 165°, 3.75 hrs., 12-15% salicylic acid, 44% of an oxo acid; acetovanillone (V), 165°, 3.75 hrs., good yield of vanillin (VI); acetoveratrone, 165°, 3.5 hrs., 90% vanilloylformic acid (VII), 4.25% VI, and 0.5% vanillic acid; veratrylactone, 165°, 3.5 hrs., 3.8% veratroylformic acid, 2.5% VI, and veratraldehyde; isoeugenol, 165°, 3.5 hrs., 55% o-vanillin. V with m-O₂NC₆H₄SO₃Na gave VII. Isoacetovanillone gave 26% isovanilloylformic acid. In the experiment, the researchers used many compounds, for example, 3-Hydroxy-5-methoxybenzaldehyde (cas: 57179-35-8Synthetic Route of C8H8O3).

3-Hydroxy-5-methoxybenzaldehyde (cas: 57179-35-8) 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 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.Synthetic Route of C8H8O3

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

Effective and regioselective iodination of arenes using iron(III) nitrate in the presence of tungstophosphoric acid was written by Jafarzadeh, Mohammad;Amani, Kamal;Nikpour, Farzad. And the article was included in Canadian Journal of Chemistry in 2005.Electric Literature of C8H9IO This article mentions the following:

An easy, cheap, and effective method for iodination of various aromatic compounds takes place with mol. iodine and iron nitrate nonahydrate as the oxidant in the presence of a catalytic amount of tungstophosphoric acid in dichloromethane, with good yield and high regioselectivity under very mild conditions. In the experiment, the researchers used many compounds, for example, 4-Iodo-1-methoxy-2-methylbenzene (cas: 75581-11-2Electric Literature of C8H9IO).

4-Iodo-1-methoxy-2-methylbenzene (cas: 75581-11-2) 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 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.Electric Literature of C8H9IO

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

Enantioselective Linchpin Catalysis by SOMO Catalysis: An Approach to the Asymmetric α-Chlorination of Aldehydes and Terminal Epoxide Formation was written by Amatore, Muriel;Beeson, Teresa D.;Brown, Sean P.;MacMillan, David W. C.. And the article was included in Angewandte Chemie, International Edition in 2009.Safety of 3-(3,4-Dimethoxyphenyl)propan-1-ol This article mentions the following:

For the first time SOMO (singly occupied MO) activation has been exploited to allow a new approach to the α-chlorination of aldehydes. This transformation can be readily implemented as part of a linchpin catalysis approach to the enantioselective production of terminal epoxides. In the experiment, the researchers used many compounds, for example, 3-(3,4-Dimethoxyphenyl)propan-1-ol (cas: 3929-47-3Safety of 3-(3,4-Dimethoxyphenyl)propan-1-ol).

3-(3,4-Dimethoxyphenyl)propan-1-ol (cas: 3929-47-3) 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. 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.Safety of 3-(3,4-Dimethoxyphenyl)propan-1-ol

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

Selective oxidation of primary benzylic alcohols to aldehydes using NaNO₃ under ball milling was written by Wang, Jing-Fei;Lu, Li-Yu;Zhang, Pu;Qin, Yu-Jun;Guo, Zhi-Xin. And the article was included in Journal of Chemical Research in 2022.Computed Properties of C8H10O2 This article mentions the following:

A facile method for oxidation of primary benzylic alcs. to the corresponding aldehydes was reported using NaNO₃/P₂O₅ under high-speed ball-milling conditions. This approach was clean, efficient, and exhibits broad functional group compatibility. In the experiment, the researchers used many compounds, for example, (4-Methoxyphenyl)methanol (cas: 105-13-5Computed Properties of C8H10O2).

(4-Methoxyphenyl)methanol (cas: 105-13-5) 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. 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.Computed Properties of C8H10O2

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

Nitration in aqueous nitric acid: the rate profile and the limiting reaction rates was written by Draper, Mark R.;Ridd, John H.. And the article was included in Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) in 1981.Safety of 3-Methyl-4-nitroanisole This article mentions the following:

Rate coefficients for the nitration of RNMe₃⁺ (R = Ph, PhCH₂, p-tolyl) were used to establish a rate profile for the reaction in 63.7-100% HNO₃ at 25°, and to estimate the NO₂⁺ concentration in the aqueous medium. The nitration kinetics of a series of reactive aromatic compounds (mainly phenolic ethers) in aqueous HNO₃ were analyzed in terms of 1st-order rate coefficients and the zero-order rate of NO₂⁺ formation. The 1st-order rate coefficients approach a limiting value with increasing reactivity of the aromatic substrates; this value is as expected for the rate-determining formation of an encounter pair (ArH.NO₂⁺; Ar = aromatic). The NO₂⁺ lifetime in 60.4% HNO₃ (t_1/2 ≈ 5 × 10^-8 s) was calculated from the zero-order rate at 25° and used to show that the ArH.NO₂⁺ encounter pair is formed via diffusion together of the components. Studies on more reactive aromatic compounds were carried out in the presence of N₂H₄, since this was shown to prevent the HNO₂-catalyzed reaction previously observed In the experiment, the researchers used many compounds, for example, 3-Methyl-4-nitroanisole (cas: 5367-32-8Safety of 3-Methyl-4-nitroanisole).

3-Methyl-4-nitroanisole (cas: 5367-32-8) 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.Safety of 3-Methyl-4-nitroanisole

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