Tag: 200-300

Polyphosphazenes with Novel Architectures: Influence on Physical Properties and Behavior as Solid Polymer Electrolytes was written by Allcock, Harry R.;Sunderland, Nicolas J.;Ravikiran, Ramakrishna;Nelson, James M.. And the article was included in Macromolecules in 1998.Formula: C11H22O5 This article mentions the following:

Three types of polyphosphazenes with different architectures have been synthesized and characterized. The influence of the polymer architecture on solid ionic conductivity was of particular interest. The first type includes linear oligo- and polyphosphazenes with the general formula [N:P(OCH₂CH₂OCH₂CH₂OCH₃)₂]_n (MEEP) with different chain lengths. The second type consists of a series of tri-armed star-branched polyphosphazenes with the general formula N{CH₂CH₂NH(CF₃CH₂O)₂P[N:P(OCH₂CH₂OCH₂CH₂OCH₃)₂]_n}₃ with different arm lengths. These were synthesized via the reaction of the tridentate initiator [N{CH₂CH₂NH(CF₃CH₂O)₂P:N-PCl₃⁺}₃][PCl₆^–]₃ with the phosphoranimine Cl₃P:NSiMe₃ in CH₂Cl₂ followed by halogen replacement with sodium (methoxyethoxy)ethoxide. The mol. weights in this system were carefully controlled by variation of the monomer-to-initiator ratios, and the effect of polymer mol. weight on solid ionic conductivity was examined The third polymer system was designed to examine the effect of complex branching on ionic conductivity Thus, a highly branched polymer containing five branches from a cyclotriphosphazene pendent side group (with 26 ethyleneoxy units per repeat unit) was synthesized. The conductivity of this polymer in the presence of three different salts has been measured and compared to the behavior of MEEP with a corresponding mol. weight The mechanism of ion transport in these systems is discussed. 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: 60221-37-6Formula: C11H22O5).

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閳ユ椊 or N閳ユ椊 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.Formula: C11H22O5

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

Synthesis and photophysical properties of a 2,2′-bianthracene-based receptor bearing two aza-15-crown-5 ethers for naked-eye detection of barium ion was written by Kondo, Shin-ichi;Takahashi, Takuya;Takiguchi, Yuji;Unno, Masafumi. And the article was included in Tetrahedron Letters in 2011.COA of Formula: C10H21NO4 This article mentions the following:

As a novel chromofluorophore, 9,9′-dimethyl-2,2′-bianthracene, was successfully synthesized by reductive coupling of 2-chloro-9-methylanthracene. Absorbance and fluorescence maxima of 9,9′-dimethyl-2,2′-bianthracene can be shifted to visible-region comparing to the former 2,2′-binaphthyl-based receptors. Receptor I bearing aza-15-crown-5 moieties via methylene spacer provides selective UV-visible and fluorescence responses for Ba²⁺ due to the restriction of the conformational change through the formation of an intramol. sandwich-complex by two azacrown ethers, resulting in the presence of Ba²⁺ that can be detected by naked eye in aqueous acetonitrile. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3COA of Formula: C10H21NO4).

1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) 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. 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.COA of Formula: C10H21NO4

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

Synthesis of TEG-Substituted 4-(N-Methyl-N-Boc-amino)styrylpyridine as Key Precursor for Monodentate and Multidentate Imaging Agents for A灏?Plaques was written by Li, Zhi;Liu, Bo;Duan, Wubiao;Zhu, Lin. And the article was included in Synthetic Communications in 2015.Application In Synthesis of 2-(2-(2-((Tetrahydro-2H-pyran-2-yl)oxy)ethoxy)ethoxy)ethan-1-ol This article mentions the following:

Triethylene glycol (TEG)-substituted 4-(N-methyl-N-Boc-amino)styrylpyridine, which can serve as key precursor for many monodentate and multidentate imaging agents for A灏?plaques in the human brain, has been readily synthesized with cheap starting materials. Our new method could be employed for mass production of monodentate imaging agent AV-45 (I) and other multidentate imaging agents. 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: 60221-37-6Application In Synthesis of 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. 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. 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).Application In Synthesis of 2-(2-(2-((Tetrahydro-2H-pyran-2-yl)oxy)ethoxy)ethoxy)ethan-1-ol

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

Cytotoxic activity of alkaloids extracted from Trigonella foenum graecum (Fenugreek) against breast cancer cell line was written by Al-Sallami, Alaauldeen S. M.;Al-Labban, Zuhair Salih;Ali, Sanaa Mohemmed. And the article was included in Journal of Pharmaceutical Sciences and Research in 2019.Computed Properties of C12H17NO2 This article mentions the following:

The present study was investigated to Screening for cytotoxic activity of total alkaloid extracts of Trigonella foenum graecum (Fenugreek) against breast cancer cell line Ahmed-Mohammed-Nahi,2003 (AMN-3), AMJ-13 and normal cell line Rat Embryo Fibroblast (REF). The Trigonella foenum powders were extracted sep. with 80% Ethanol and total alkaloids separated at pH 2 and 10 with HCl and ammonia. Total alkaloids were detected qual. by Mayer閳ョ灚, Hager閳ョ灚, and Dragendorff閳ョ灚 reagents. The cytotoxic activity was evaluated by crystal violet assay. The results show that The extract of Trigonella foenum graecum had total alkaloid in extract about 1.7% resulting from getting 4.4 g of dry alkaloid extract from 252 g of dry powder of Trigonella foenum – graecum. The alkaloids reduced the cell viability of all cell lines AMN-3,AMJ-13 and REF, and the inhibitory concentration 50% of cells were 1029 娓璯/mL, 1069 娓璯/mL and 1724 娓璯/mL for AMN-3, AMJ13 and REF resp. Trigonella foenum alkaloids showed variable cytotoxic activity against cancer and normal cell lines depending on the alkaloid concentrations and cell line types. In the experiment, the researchers used many compounds, for example, N-(3-Methoxyphenyl)pivalamide (cas: 56619-93-3Computed Properties of C12H17NO2).

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. 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.Computed Properties of C12H17NO2

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

Synthesis of Arylglyoxylic Acids and Their Collision-Induced Dissociation was written by Wadhwa, Kuldeep;Yang, Chengxi;West, Paul R.;Deming, Kris C.;Chemburkar, Sanjay R.;Reddy, Rajarathnam E.. And the article was included in Synthetic Communications in 2008.Recommanded Product: 1-(4-(4-Methoxyphenoxy)phenyl)ethanone This article mentions the following:

A variety of substituted arylglyoxylic acids (2a-g) were synthesized via oxidation of the corresponding aryl Me ketones (1a-e) using selenium dioxide or Friedel-Crafts acylation of phenol (3) with Et chlorooxoacetate and further transformations. It was found that the arylglyoxylic acids (2) undergo facile unimol. dissociation with loss of carbon monoxide to give the corresponding arylcarboxylic acids (7) under collisionally induced mass spectrometric conditions. In the experiment, the researchers used many compounds, for example, 1-(4-(4-Methoxyphenoxy)phenyl)ethanone (cas: 54916-28-8Recommanded Product: 1-(4-(4-Methoxyphenoxy)phenyl)ethanone).

1-(4-(4-Methoxyphenoxy)phenyl)ethanone (cas: 54916-28-8) 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. 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: 1-(4-(4-Methoxyphenoxy)phenyl)ethanone

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

1-Aza-15-Crown-5 Functionalized Graphene Oxide for 2D Graphene-Based Li⁺-ion Conductor was written by Banerjee, Moutusi;Gupta, Abhisek;Saha, Shyamal K.;Chakravorty, Dipankar. And the article was included in Small in 2015.Formula: C10H21NO4 This article mentions the following:

Attachment of Li⁺ ion on graphene surface to realize Li⁺-ion conductor is a real challenge because of the weak interaction between the ions and the functional groups of graphene oxide; although, a large number of theor. results are already available in the literature. To overcome this problem, graphene oxide is functionalized by 1-aza-15-crown-5, the cage-like structure containing four oxygens that can bind Li⁺ ion through electrostatic interaction. Li⁺ migration on graphene surface has been investigated using ac relaxation mechanism. Perfect Debye-type relaxation behavior with 灏?(relaxation exponent) value 閳?1 resulting from single ion is observed The activation energy of Li⁺ migration arising due to cation-锜?interaction is found to be 0.37 eV, which agrees well with recently reported theor. value. It is believed that this study will help to design isolated ion conductors for Li⁺-ion battery. 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. 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. 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.Formula: C10H21NO4

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

More insight into the chemical composition of Greek propolis; differences and similarities with Turkish propolis was written by Celemli, Omur G.;Hatjina, Fani;Charistos, Leonidas;Schiesser, Aygun;Ozkirim, Asli. And the article was included in Zeitschrift fuer Naturforschung, C: Journal of Biosciences in 2013.Recommanded Product: 6972-61-8 This article mentions the following:

We aimed to determine the differences and similarities between Greek and Turkish propolis with respect to their chem. composition given that the two countries have many similarities in oral biodiversity. We observed that: a) Greek propolis is different from the European-type propolis, having a high terpene content; therefore we can deinitely characterize it as a Mediterranean type; b) the Turkish propolis collected along the coast line of the Aegean Sea is similiar to the examined Greek propolis; c) the remaining Turkish samples, originating from the European part of Turkey, were found to be similiar to the European-type propolis, having a high flavonoid content. Finally, especially two compounds, 灏?elemene and totarol, were found in Greek samples in quite high amounts that are thought to have important biol. properties. In the experiment, the researchers used many compounds, for example, 3-(2,4-Dimethoxyphenyl)acrylic acid (cas: 6972-61-8Recommanded Product: 6972-61-8).

3-(2,4-Dimethoxyphenyl)acrylic acid (cas: 6972-61-8) 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 can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O閳ユ椊 or N閳ユ椊 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: 6972-61-8

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

Highly chemoselective acylation of substituted aminophenols with 3-(trimethylacetyl)-1,3-thiazolidine-2-thione was written by Dai, Wei-Min;Cheung, Yuk King;Tang, Kit Wan;Choi, Pui Yiu;Chung, Suet Lam. And the article was included in Tetrahedron in 1995.Recommanded Product: 56619-93-3 This article mentions the following:

A general procedure for chemoselective acylation of substituted aminophenols has been developed. The N-acylated products were prepared in 70-100% yield by treating the aminophenols with 3-(trimethylacetyl)-1,3-thiazolidine-2-thione (1) in refluxing THF. The pivalate esters of 3- and 4-aminophenols could be obtained in 70-94% yield by treating with 1 and NaH. In the experiment, the researchers used many compounds, for example, N-(3-Methoxyphenyl)pivalamide (cas: 56619-93-3Recommanded Product: 56619-93-3).

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

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

A Meta-Selective Copper-Catalyzed C-H Bond Arylation was written by Phipps, Robert J.;Gaunt, Matthew J.. And the article was included in Science (Washington, DC, United States) in 2009.Electric Literature of C12H17NO2 This article mentions the following:

For over a century, chem. transformations of benzene derivatives were guided by the high selectivity for electrophilic attack at the ortho/para positions in electron-rich substrates and at the meta position in electron-deficient mols. The authors have developed a copper-catalyzed arylation reaction that, in contrast, selectively substitutes Ph electrophiles at the aromatic carbon-hydrogen sites meta to an amido substituent. This previously elusive class of transformation is applicable to a broad range of aromatic compounds In the experiment, the researchers used many compounds, for example, N-(3-Methoxyphenyl)pivalamide (cas: 56619-93-3Electric Literature of C12H17NO2).

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. 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).Electric Literature of C12H17NO2

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

Optical studies on coumarins. II. Ultraviolet absorption of monohydroxycoumarins and derivatives was written by Bohme, Horst;Severin, Theodor. And the article was included in Archiv der Pharmazie und Berichte der Deutschen Pharmazeutischen Gesellschaft in 1957.Application In Synthesis of 3-(2,4-Dimethoxyphenyl)acrylic acid This article mentions the following:

In comparative studies of 4 monohydroxycoumarins, the longwave absorption bands were found to be moved bathochromically by introduction of a hydroxy group in the 6 or 7 position, while the corresponding maximum of 5-and 8-hydroxycoumarins lies at shorter wave lengths. As with coumarin itself 3 bands appear with 5-, 6-, and 8-hydroxycoumarin. 7-Hydroxycoumarin does not produce the medial bands with an inflection at 240 m娓? Dihydroxy-trans-cinnamic acids are optically very similar to their methylated derivatives, but big differences were noted between hydroxycoumarins and dimethoxy-cis-cinnamic acids. In the experiment, the researchers used many compounds, for example, 3-(2,4-Dimethoxyphenyl)acrylic acid (cas: 6972-61-8Application In Synthesis of 3-(2,4-Dimethoxyphenyl)acrylic acid).

3-(2,4-Dimethoxyphenyl)acrylic acid (cas: 6972-61-8) 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. 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 In Synthesis of 3-(2,4-Dimethoxyphenyl)acrylic acid

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