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Asymmetric Hydroalkynylation of Norbornadienes Promoted by Chiral Iridium Catalysts was written by Fan, Bao-Min;Yang, Qing-jing;Hu, Jun;Fan, Cai-ling;Li, Si-feng;Yu, Lu;Huang, Chao;Tsang, Wing Wai;Kwong, Fuk Yee. And the article was included in Angewandte Chemie, International Edition in 2012.Category: ethers-buliding-blocks This article mentions the following:

The first successful iridium-catalyzed asym. hydroalkynylation of norbornadienes with terminal alkynes to provide alkynylnorbornenes with high to excellent enantioselectivities (up to 97% ee) was reported. A broader substrate scope can be presented on either a norbornadiene or alkyne moiety. 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. 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.Category: ethers-buliding-blocks

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

Identification, isolation and characterization of potential degradation product in idebenone drug substance was written by Ramulu, K.;Rao, B. M.;Rao, N. Someswara. And the article was included in Rasayan Journal of Chemistry in 2013.Category: ethers-buliding-blocks This article mentions the following:

In the stress degradation studies of Idebenone, one major unknown base degradation impurity was identified by LC-MS. This impurity was isolated using preparative high performance liquid chromatog. Based on the spectral data (¹H NMR, ¹³C NMR, DEPT, MS, HR-MS and IR), this degradation impurity is characterized as 2-hydroxy-5-(10-hydroxydecyl)-3-methoxy-6-methylcyclohexa-2,5-diene-1,4-dione. The details of stress studies, identification, isolation, characterization, formation and mechanism of this impurity is discussed and presented in detail. In the experiment, the researchers used many compounds, for example, 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione (cas: 605-94-7Category: ethers-buliding-blocks).

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. 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.Category: ethers-buliding-blocks

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

Change in the rate of pseudo[1]rotaxane formation by elongating the alkyl-chain-substituted diphenylethynylene linked to permethyl α-cyclodextrin was written by Ishino, Saqura;Masai, Hiroshi;Shimada, Sotaro;Terao, Jun. And the article was included in Tetrahedron Letters in 2020.Product Details of 111-77-3 This article mentions the following:

Herein, we report the kinetics of pseudo[1]rotaxane formation from permethyl α-cyclodextrin attached to a flexible-chain-substituted diphenylethynylene. When the chain is an alkyl group, the rate of formation shows different trends over three regions of chain length: deceleration (chain length = 1-3), acceleration (4-8), and re-deceleration (>12). This behavior is driven by a relative decrease in the ΔH of the transition. In the experiment, the researchers used many compounds, for example, 2-(2-Methoxyethoxy)ethanol (cas: 111-77-3Product Details of 111-77-3).

2-(2-Methoxyethoxy)ethanol (cas: 111-77-3) 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. 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.Product Details of 111-77-3

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

Nickel-Catalyzed Reductive Cleavage of Carbon-Oxygen Bonds in Anisole Derivatives Using Diisopropylaminoborane was written by Igarashi, Takuya;Haito, Akira;Chatani, Naoto;Tobisu, Mamoru. And the article was included in ACS Catalysis in 2018.Formula: C14H21BO4 This article mentions the following:

The catalytic removal of a methoxy group on an aromatic ring allows this group to be used as a traceless activating and directing group for aromatic functionalization reactions. Although several catalytic methods for the reductive cleavage of anisole derivatives have been reported, all are applicable only to π-extended aryl ethers, such as naphthyl and biphenyl ethers, while monocyclic aryl ethers cannot be reduced. Herein, we report a nickel-catalyzed reductive cleavage reaction of C-O bonds in aryl ethers using diisopropylaminoborane as the reducing agent. Unlike previously reported methods, this reducing reagent allows effective C-O bond reduction in a much wider range of aryl ether substrates, including monocyclic and heterocyclic ethers bearing various functional groups. In the experiment, the researchers used many compounds, for example, 2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 365564-07-4Formula: C14H21BO4).

2-(3,5-Dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 365564-07-4) 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.Formula: C14H21BO4

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

Ru()-Catalyzed annulation of benzamidines and alkynes by C-H/N-H activation: a facile synthesis of 1-aminoisoquinolines was written by Kaishap, P. P.;Duarah, G.;Chetia, D.;Gogoi, S.. And the article was included in Organic & Biomolecular Chemistry in 2017.Name: 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene This article mentions the following:

An inexpensive Ru(II) complex catalyzes the oxidative annulation reaction of disubstituted alkynes with benzamidines to provide highly valuable 1-aminoisoquinolines in high yields. The reaction also features excellent regioselectivity with some unsym. alkynes. In the experiment, the researchers used many compounds, for example, 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1Name: 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene).

1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1) 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).Name: 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene

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

Mayence, Annie; Eynde, Jean Jacques Vanden published an article in 2019, the title of the article was Tafenoquine: A 2018 Novel FDA-approved prodrug for the radical cure of Plasmodium vivax malaria and prophylaxis of malaria.Name: 1-Fluoro-2-methoxybenzene And the article contains the following content:

Tafenoquine (an 8-aminoquinoline) was approved by the Food and Drug Administration (FDA) in 2018 for the radical cure of Plasmodium vivax malaria and preventive action against malaria. Despite the fact that the mechanism of action of the drug remains unclear, all studies indicated that a metabolite is responsible for its efficacy. Routes for the preparation of the drug are described. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Name: 1-Fluoro-2-methoxybenzene

The Article related to chloroquine primaquine tafenoquine antimalarial antiplasmodial agent malaria plasmodium, fda, plasmodium, aminoquinoline, approved drugs, hypnozoite, malaria, Placeholder for records without volume info and other aspects.Name: 1-Fluoro-2-methoxybenzene

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

On May 15, 2021, Li, Mingxue; Mei, Qiong; Wei, Bo; An, Zexiu; Sun, Jianfei; Xie, Ju; He, Maoxia published an article.Recommanded Product: 1,2-Dimethoxybenzene The title of the article was Mechanism and kinetics of ClO·-mediated degradation of aromatic compounds in aqueous solution: DFT and QSAR studies. And the article contained the following:

The action of ClO· is more prominent than HO· and Cl· in the advanced oxidation degradation of some pollutants. However, studies on the pollutant degradation mechanism and kinetics by ClO· are limited. In this study, 43 different kind of aromatic compounds which are important anthropogenic and natural water pollutants were selected as models to investigate their ClO· oxidation mechanism and kinetics computationally. The results showed that radical adduct formation (RAF) rather than single electron transfer (SET) reaction was prominent in ClO·-initiated reactions of aromatic compounds In subsequent reactions of the ClO-adduct, the Cl end of the -OCl moiety shifted to the benzene ring, which was the key to hydroxylation and chlorination of aromatic compounds by ClO·. The calculated ClO· initiated reaction rate constants (k·ClO) of aromatic compounds were 102-1010 M-1 s-1. ClO· was highly reactive to phenolates, anilines and alkoxy/hydroxyl aromatic compounds Upon the deprotonation of phenol to phenolate, the k·ClO value increased by 4 orders of magnitude. The k·ClO values of alkoxybenzenes were higher for compounds with shorter alkyl side chains and more alkoxy substituents. The k·ClO increased for anilines with longer alkyl side chains. The k·ClO quant. structure-activity relationships (QSARs) models were developed to predict the reactivity of ClO· to complex aromatic compounds in aquatic systems. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Recommanded Product: 1,2-Dimethoxybenzene

The Article related to density functional theory degradation chlorine oxide radical wastewater treatment, Waste Treatment and Disposal: Chemical Treatment Of Aqueous Wastes and other aspects.Recommanded Product: 1,2-Dimethoxybenzene

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

Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. 73724-45-5, formula is C18H17NO5, Name is Fmoc-Ser-OH. 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. Electric Literature of 73724-45-5.

Egelund, Peter H. G.;Jadhav, Sandip;Martin, Vincent;Johansson Castro, Henrik;Richner, Franziska;Le Quement, Sebastian Thordal;Dettner, Frank;Lechner, Carolin;Schoenleber, Ralph;Sejer Pedersen, Daniel research published 《 Fmoc-removal with pyrrolidine expands the available solvent space in green solid-phase peptide synthesis》, the research content is summarized as follows. Green binary solvent mixtures with a polarity and viscosity close to that of DMF perform similarly in solid-phase peptide synthesis (SPPS). However, while coupling reactions readily proceed in solvents of significantly lower polarity than that of DMF, a high solvent polarity is essential for Fmoc-removal (Fmoc = 9-fluorenylmethoxycarbonyl) using piperidine, which limits the options for green SPPS solvents. Herein, we report our efforts to expand the available solvent polarity space for green SPPS. We identified pyrrolidine as an efficient base to enable Fmoc-removal in less polar solvent mixtures that also favor coupling reactions, such as DMSO/ethyl acetate (1:9) and N-butylpyrrolidone/1,3-dioxolane (2:8 and 4:6). Employing less polar binary solvent mixtures in combination with pyrrolidine gave crude peptide purities comparable to or better than for DMF with piperidine in the SPPS of challenging peptide targets. An evaluation of base-dependent side reactions such as diketopiperazine (DKP) and aspartimide formation showed increased side-product formation when using pyrrolidine on DKP- and aspartimide-prone sequences. However, the scaled-up syntheses (5 and 7.5 mmol, resp.) of the peptide therapeutics dasiglucagon (29-mer) and bivalirudin (20-mer) gave good crude peptide purities and purity profiles amenable to SPPS optimization. Pyrrolidine therefore represents a useful alternative to piperidine for Fmoc-removal in an expanded solvent space for green SPPS.

Electric Literature of 73724-45-5, Fmoc-Ser-OH, also known as Fmoc-Ser-OH, is a useful research compound. Its molecular formula is C18H17NO5 and its molecular weight is 327.3 g/mol. The purity is usually 95%.
Fmoc-L-Ser-OH is a synthetic peptide that belongs to the group of glycopeptides. It is used as a model for such compounds and has been shown to have antimicrobial activity in vitro against gram-positive bacteria, especially Staphylococcus epidermidis. This compound was synthesized from 3-mercaptopropionic acid and chloride in the presence of hydroxyl groups and epidermal growth factor. The synthetic pathway can be divided into three steps: (1) condensation of 3-mercaptopropionic acid with hydrochloric acid to yield 3-mercaptoacrylic acid; (2) esterification of 3-mercaptoacrylic acid with glycine to form Fmoc-L-Ser; and (3) deprotection of Fmoc protecting group., 73724-45-5.

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

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 73590-85-9, is researched, SMILESS is CC1=CN=C(CSC2=NC3=CC(OC)=CC=C3N2)C(C)=C1OC, Molecular C17H19N3O2SJournal, Heterocyclic Communications called An efficient asymmetric approach to the R-enantiomer impurity of esomeprazole, Author is Zhou, Guobin; Guan, Yueqing, the main research direction is esomeprazole preparation enantioselective.Application In Synthesis of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole.

The R-enantiomer of esomeprazole (5-methoxy-2-[(4-methoxy-3, 5-dimethyl-2-pyridinylmethyl)sulfinyl]-1H-benzimidazole) was synthesized with high enantioselectivity by asym. oxidation of prochiral sulfide using the oxaziridinium salt. This (R)-enantiomer, useful as a reference for the quality control of esomeprazole was characterized by 1H and 13CNMR, IR and HRMS. The enantiomeric excess was determined by HPLC.

After consulting a lot of data, we found that this compound(73590-85-9)Application In Synthesis of 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole can be used in many types of reactions. And in most cases, this compound has more advantages.

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

Adding a certain compound to certain chemical reactions, such as: 2688-84-8, name is 2-Phenoxyaniline, belongs to ethers-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 2688-84-8, Formula: C12H11NO

Exemplary Compound B-16 was synthesized from the intermediate 3. The intermediate 3 (332 mg, 0.5 mmol), 2-phenoxyaniline (55 6 mg, 3 mmol), and ethanol (10 ml) were charged in a reaction container, and then stirred under heating and refluxing for 8 hours. After the completion of a reaction, the ethanol was vacuum-removed, and then ethyl acetate was added to deposit a precipitate. Filtering was performed, the obtained crystal was dissolved in water, an aqueous solution in which potassium hexafluorophosphate (1 g) was dissolved was added dropwise, the resultant substance was stirred at room temperature for 3 hours, and then the deposited crystal was filtered. The obtained crystal was recrystallized with isopropyl alcohol to give 323 mg (Yield: 81%) of Exemplary Compound B-16. The structure of Exemplary Compound B-16 was confirmed by NMR measurement. 1H NMR (CD3CN, 500 MHz) sigma (ppm): 9.13 (d, 2H), 9.01 (s, 1H), 8.97 (d, 1H), 8.25 (d, 2H), 8.09 (d, 1H), 7.78-7.64 (m, 4H), 7.45 (m, 6H), 7.28 (m, 2H), 7.14 (m, 6H), 3.93 (s, 3H), 3.92 (s, 3H), 2.50 (s, 3H)

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Reference:
Patent; CANON KABUSHIKI KAISHA; Igawa, Satoshi; Yamamoto, Jun; Yamada, Kenji; Tamura, Tetsuya; (31 pag.)US2017/329195; (2017); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem