Ethers-buliding-blocks

Selective Three-Component 1,2-Aminoalkoxylation of 1-Aryl-1,3-dienes by Dual Photoredox and Copper Catalysis was written by Wu, Ya-Li;Jiang, Min;Rao, Li;Cheng, Ying;Xiao, Wen-Jing;Chen, Jia-Rong. And the article was included in Organic Letters in 2022.Product Details of 105-13-5 This article mentions the following:

A three-component 1,2-aminooxygenation reaction of 1,3-dienes by dual photoredox and copper catalysis was described. This protocol uses N-aminopyridinium salts as N-centered radical precursors and nucleophilic alcs. as oxygen sources, providing modular and practical access to 1,2-aminoalkoxylation products with good yields and regioselectivity. Preliminary mechanistic studies support the radical property of the reaction and the involvement of N-centered radical intermediates. In the experiment, the researchers used many compounds, for example, (4-Methoxyphenyl)methanol (cas: 105-13-5Product Details of 105-13-5).

(4-Methoxyphenyl)methanol (cas: 105-13-5) 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 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.Product Details of 105-13-5

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

Mild and efficient synthesis of indoles and isoquinolones via a nickel-catalyzed Larock-type heteroannulation reaction was written by Weng, Wei-Zhi;Xie, Jian;Zhang, Bo. And the article was included in Organic & Biomolecular Chemistry in 2018.Application of 16356-02-8 This article mentions the following:

A simple and efficient approach for the preparation of substituted indoles and isoquinolones via a nickel-catalyzed Larock-type heteroannulation reaction is reported. This transformation employed air-stable and inexpensive Ni(dppp)Cl₂ as a precatalyst and Et₃N as a mild base. Moreover, the reaction occurs efficiently under mild conditions, and a wide range of substituted indoles and isoquinolones bearing various functional groups are obtained in moderate to excellent yields. In the experiment, the researchers used many compounds, for example, 1,4-Dimethoxy-2-butyne (cas: 16356-02-8Application of 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, 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. 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.Application of 16356-02-8

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

Correlation between Macroscopic Diffusion Rates and Microscopic Interactions in Ethylene Glycol-Based Solvents was written by Nagumo, Ryo;Omori, Kohei;Muraki, Yukihiro;Iwata, Shuichi;Mori, Hideki;Yamada, Hidetaka. And the article was included in Industrial & Engineering Chemistry Research in 2021.Electric Literature of C8H18O4 This article mentions the following:

An evaluation of mol. interactions is important for estimating macroscopic properties, such as solubility and diffusivity. In this study, for several types of ethylene glycol-based absorbents, we discuss the correlation between a macroscopic property (mol. diffusivity) and a microscopic criterion (residence time) using mol. dynamics simulations for pure solvent systems and CO₂-loaded solvent systems. The neg. correlations between the diffusivity and the residence time can be divided into categories, depending on the number of constituent hydroxy groups of the solvent mols. The disparity between the categories arises from whether hydrogen bonding can be formed between the solvent mols. This study leads to the systematic estimation of the mol. diffusivity from the theor. prediction of the residence time. We believe that the residence time is suitable as a criterion to evaluate macroscopic properties. In the experiment, the researchers used many compounds, for example, 2,5,8,11-Tetraoxadodecane (cas: 112-49-2Electric Literature of 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. 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.Electric Literature of C8H18O4

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

New antitumor compounds from Carya cathayensis was written by Wu, Wei;Bi, Xiu-Li;Cao, Jia-Qing;Zhang, Kai-Qing;Zhao, Yu-Qing. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2012.Category: ethers-buliding-blocks This article mentions the following:

A new lignan (7R,8S,8’R)-4,4′,9-trihydroxy-7,9′-epoxy-8,8′-lignan, and three new phenolics, carayensin-A, carayensin-B, and carayensin-C, together with 13 known compounds were isolated from the shells of Carya cathayensis. Their chem. structures were established mainly by 1D and 2D NMR techniques and mass spectrometry. All the compounds were evaluated for cytotoxicity against several human tumor types including human colorectal cancer cell lines (HCT-116, HT-29), human lung cancer cell line (A549), and human breast cancer cell line (MCF-7). The compounds 1, 5, 6, and 16 are considered to be potential as antitumor agents, which could significantly inhibit the cancer cell growth in a dose-dependent manner. In the experiment, the researchers used many compounds, for example, 3-Hydroxy-5-methoxybenzaldehyde (cas: 57179-35-8Category: ethers-buliding-blocks).

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. 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.Category: ethers-buliding-blocks

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

Spin-Center Shift-Enabled Direct Enantioselective α-Benzylation of Aldehydes with Alcohols was written by Nacsa, Eric D.;MacMillan, David W. C.. And the article was included in Journal of the American Chemical Society in 2018.COA of Formula: C11H16O3 This article mentions the following:

Nature routinely engages alcs. as leaving groups, as DNA biosynthesis relies on the removal of water from ribonucleoside diphosphates by a radical-mediated “spin-center shift” (SCS) mechanism. Alcs., however, remain underused as alkylating agents in synthetic chem. due to their low reactivity in two-electron pathways. We report herein an enantioselective α-benzylation of aldehydes using alcs. as alkylating agents based on the mechanistic principle of spin-center shift. This strategy harnesses the dual activation modes of photoredox and organocatalysis, engaging the alc. by SCS and capturing the resulting benzylic radical with a catalytically generated enamine. Mechanistic studies provide evidence for SCS as a key elementary step, identify the origins of competing reactions, and enable improvements in chemoselectivity by rational photocatalyst design. In the experiment, the researchers used many compounds, for example, 3-(3,4-Dimethoxyphenyl)propan-1-ol (cas: 3929-47-3COA of Formula: C11H16O3).

3-(3,4-Dimethoxyphenyl)propan-1-ol (cas: 3929-47-3) 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.COA of Formula: C11H16O3

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

Characterization of the Local Volume Probed by the Side-Chain Ends of Poly(oligo(ethylene glycol) 1-Pyrenemethyl ether methacrylate) Bottle Brushes in Solution Using Pyrene Excimer Fluorescence was written by Thoma, Janine L.;Duhamel, Jean. And the article was included in Macromolecules (Washington, DC, United States) in 2021.Recommanded Product: 111-77-3 This article mentions the following:

Four poly(oligo(ethylene glycol) 1-pyrenemethyl ether methacrylate) [P(PyEG_yMA), with y = 3, 5, 8, and 12] samples were synthesized, where each side chain was terminated with a 1-pyrenemethoxy derivative The efficiency of excimer formation between an excited-state pyrene and a ground-state pyrene was used to assess the conformation of the PyEG_y side chains in these polymeric bottle brushes by conducting time-resolved fluorescence measurements in THF (THF), N,N-dimethylformamide (DMF), dioxane, and dimethylsulfoxide (DMSO). These experiments took advantage of the dependency of the average rate constant 〈kã€?of pyrene excimer formation (PEF) on the local pyrene concentration [Py]_loc experienced by an excited pyrene bound to the P(PyEG_yMA) samples. [Py]_loc could be estimated theor. by assuming that the EG_y side chains adopted a Gaussian conformation. Linear plots of 〈kã€?f_diff as a function of [Py]_loc, where f_diff is the molar fraction of pyrenyl labels forming excimers by diffusion and was introduced to account for residual pyrene aggregation, were obtained in all four solvents, with slopes that depended on solvent viscosity and the probability of PEF upon the diffusive encounter between two pyrenyl labels. Solvent-induced differences in PEF efficiency could be accounted for by determining the bimol. rate constant k_diff[inter] for intermol. PEF with the model compound 1-pyrenemethyl diethylene glycol Me ether in the four solvents. Except for DMSO, which was too polar and led to the segregation of the pyrenyl labels close to the polymethacrylate backbone, the data obtained for all P(PyEG_yMA) samples in THF, DMF, and dioxane collapsed on a master line, similar to the one obtained earlier with a series of pyrene-labeled dendrons, when plotting 〈kã€?(f_diff x k_diff[inter])-vs-[Py]_loc. The 〈kã€?(f_diff x k_diff[inter])-vs-[Py]_loc master line confirmed the direct relationship that exists between the PEF efficiency and [Py]_loc, a relationship that could be used to probe the conformation of highly branched macromols. in solution In the experiment, the researchers used many compounds, for example, 2-(2-Methoxyethoxy)ethanol (cas: 111-77-3Recommanded Product: 111-77-3).

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. 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: 111-77-3

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

A Mild and Ligand-Free Ni-Catalyzed Silylation via C-OMe Cleavage was written by Zarate, Cayetana;Nakajima, Masaki;Martin, Ruben. And the article was included in Journal of the American Chemical Society in 2017.SDS of cas: 365564-07-4 This article mentions the following:

Metal-catalyzed transformations that forge carbon-heteroatom bonds are of central importance in organic synthesis. Despite the formidable potential of aryl Me ethers as coupling partners, the scarcity of metal-catalyzed C-heteroatom bond formations via C-OMe cleavage is striking, with isolated precedents requiring specialized, yet expensive, ligands, high temperatures, and π-extended backbones. Authors report an unprecedented catalytic ipso-silylation of aryl Me ethers under mild conditions and without recourse to external ligands. The method is distinguished by its wide scope, which includes the use of benzyl Me ethers, vinyl Me ethers, and unbiased anisole derivatives, thus representing a significant step forward for designing new C-heteroatom bond formations via C-OMe scission. Applications of this transformation in orthogonal silylation techniques as well as in further derivatizations are also described. Preliminary mechanistic experiments suggest the intermediacy of Ni(0)-ate complexes, leaving some doubt that a canonical catalytic cycle consisting of an initial oxidative addition of the C-OMe bond to Ni(0) species comes into play. In the experiment, the researchers used many compounds, for example, 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 365564-07-4SDS of cas: 365564-07-4).

2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 365564-07-4) 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. 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: 365564-07-4

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

Friedlander synthesis of substituted quinolines from N-pivaloylanilines was written by Ubeda, J. Ignacio;Villacampa, Mercedes;Avendano, Carmen. And the article was included in Synthesis in 1998.Product Details of 56619-93-3 This article mentions the following:

Quinolines were synthesized by lithiation of N-pivaloylanilines with sec-BuLi, formylation with DMF, and subsequent condensation with active methylene groups of aldehydes or ketones (KHMDS). The pivaloyloxy group is eliminated during the 1-pot procedure in most cases. The scope of the reaction was studied, showing that the method is limited by the nature of intermediate compounds In the experiment, the researchers used many compounds, for example, N-(3-Methoxyphenyl)pivalamide (cas: 56619-93-3Product Details of 56619-93-3).

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

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

A bagasse-supported magnetic manganese dioxide nanoparticle: applications in the selective aerobic oxidation of alcohols and one-pot tandem oxidative synthesis of quinazolinones was written by Rashidi Vahid, Adina;Hajishaabanha, Fatemeh;Shaabani, Shabnam;Farhid, Hassan;Shaabani, Ahmad. And the article was included in Journal of the Iranian Chemical Society in 2022.HPLC of Formula: 105-13-5 This article mentions the following:

Magnetic manganese dioxide nanoparticles (MnO₂-Fe₃O₄) were coated on sugarcane bagasse as a sugar industrial waste and bio-support (MnO₂-Fe₃O₄@bagasse) via an in situ reduction strategy, in which potassium permanganate was used as the precursor of MnO₂ and sugarcane bagasse as a bio-support and reducing agent of KMnO4. The synthesized bio-based catalyst was characterized by X-ray diffraction, thermogravimetric anal., inductively coupled plasma optical emission spectroscopy, SEM, energy dispersive spectroscopy, Brunauer-Emmett-Teller surface area anal., and vibrating sample magnetometer anal. The catalyst was successfully utilized in the selective aerobic oxidation of primary and secondary benzylic alcs. R¹CH(OH)R² (R¹ = Ph, 4-nitrophenyl, 2,4-dichlorophenyl, 3-phenylpropyl, etc.; R² = H, Me, Ph, 2-oxo-2-phenylethyl) to their corresponding carbonyl compounds R¹C(O)R² and one-pot tandem oxidative synthesis of 2-(substituted)quinazoline-4(3H)-ones I (R³ = Ph, 3-methoxyphenyl, 4-nitrophenyl, 2,4-dichlorophenyl, etc.) from the o-aminobenzamide and aromatic alcs. R³CH₂OH in the absence of oxidizing reagent or initiator. In the experiment, the researchers used many compounds, for example, (4-Methoxyphenyl)methanol (cas: 105-13-5HPLC of Formula: 105-13-5).

(4-Methoxyphenyl)methanol (cas: 105-13-5) 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 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.HPLC of Formula: 105-13-5

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

Reducing Cellulose Crystallinity with a Noncellulose-Dissolving Solid Zwitterion and Its Application for Biomass Pretreatment was written by Hachisu, Ayumi;Tobe, Hitomi;Ninomiya, Kazuaki;Takahashi, Kenji;Kuroda, Kosuke. And the article was included in ACS Sustainable Chemistry & Engineering in 2022.Category: ethers-buliding-blocks This article mentions the following:

One-pot ethanol production from plant biomass (successive biomass pretreatment, enzymic hydrolysis, and fermentation in a single vessel) is necessary for the practical production of second-generation bioethanol because multipot procedures require large energy inputs. One-pot ethanol production requires low-toxicity cellulose solvents, and liquid zwitterions are the most promising candidates. However, liquid zwitterions have complex synthetic procedures, which significantly increases the energy cost. Here, the applicability of low-toxic simple zwitterions was investigated from the viewpoint of pretreatment ability for one-pot ethanol production In this study, a simple solid noncellulose dissolving zwitterion was able to reduce the crystallinity of microcrystalline cellulose. The pretreatment of cellulose was performed in a zwitterion/water mixture at 100° while removing water. The imidazolium cation and carboxylate anion are key structures for an efficient pretreatment. Cellulose pretreated with the solid zwitterion was susceptible to hydrolysis, and the hydrolysis efficiency was comparable to that of the liquid zwitterion, which dissolves cellulose. The simple solid zwitterion was also effective for biomass pretreatment. The zwitterion delignified as well as reduced crystallinity, resulting in the pretreatment of bagasse. The pretreatment ability for bagasse was comparable to that of liquid zwitterions. 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. 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. 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.Category: ethers-buliding-blocks

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