Tag: 100-200

Pressure and temperature effect on hypergolic ignition delay of triglyme-based fuel with hydrogen peroxide was written by Kapusta, Lukasz Jan;Boruc, Lukasz;Kindracki, Jan. And the article was included in Fuel in 2021.Recommanded Product: 2,5,8,11-Tetraoxadodecane This article mentions the following:

In this study the effect of fuel temperature and environmental pressure on hypergolic ignition delay of triglyme (triethylene glycol di-Me ether) with the addition of sodium borohydride and hydrogen peroxide was investigated. The research was conducted in a constant volume chamber using a drop-test method where the oxidizer drop was released into the fuel pool. The environmental pressure (absolute) was 0.1, 0.5, 1, 1.5 and 2 MPa; while the fuel temperature was 22, 40 and 60°C. The main advantage of this study is that the effects of pressure and temperature were not investigated sep. but the tests were done for full matrix conditions. This allowed the evaluation of the effect of fuel temperature at ambient and elevated pressures, and the effect of environmental pressure for ambient and elevated fuel temperatures, based on direct ignition delay measurements, a unique feature of this research. Addnl., the dispersion of the results was analyzed in terms of repeatability of droplet parameters i.e. Weber number, as well as the diameter and velocity sep., along with eccentricity. The results have shown a huge influence on the ignition delay of both the fuel temperature and the environmental pressure. It was noticed that the average values of the Weber number and the droplet eccentricity remained at a similar level for all measurement points. In the experiment, the researchers used many compounds, for example, 2,5,8,11-Tetraoxadodecane (cas: 112-49-2Recommanded Product: 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.Recommanded Product: 2,5,8,11-Tetraoxadodecane

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

Determination of jet fuel system icing inhibitor by GCxGC-FID was written by Vozka, Petr;Kilaz, Gozdem. And the article was included in Talanta in 2020.Electric Literature of C5H12O3 This article mentions the following:

Jet fuel usually contains a small amount of dissolved H₂O, which can sep. out at high altitudes and low temperatures This can bring along serious clog issues as H₂O can freeze in fuel pumps, lines, or filters; blocking the fuel flow which can even cause engine shut down. To prevent such a disaster, an additive called fuel system icing inhibitor (FSII) is added to jet fuels. The amount of FSII is regulated in both civil and military jet fuels by pertinent standards A method for quantification of FSII: diethylene glycol monomethyl ether (DiEGME) by comprehensive 2-dimensional gas chromatog. with flame ionization detector (GC x GC-FID) was developed. The method allows the determination of DiEGME from a very small quantity of samples (0.5μL) and is very fast with a mean absolute error of 0.001 volume% and a correlation coefficient of 0.9997. The DiEGME content (at 0.07-0.12 volume%) in 23 fuel samples was analyzed via GC x GC-FID. The accuracy of the proposed method was evaluated by the ASTM standard D5006. The procedure that uses a refractometer, outlined in D5006, is currently the only available standard for determining the DiEGME concentration in fuel. Results were within the repeatability of the D5006 method (0.009 volume%). Since the D5006 method is accepted as an accurate technique for DiEGME content determination, the GC x GC method proposed in this study can be considered precise and accurate. In the experiment, the researchers used many compounds, for example, 2-(2-Methoxyethoxy)ethanol (cas: 111-77-3Electric Literature of C5H12O3).

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. 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.Electric Literature of C5H12O3

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

Aluminum-catalyzed selective hydroboration of carbonyls and dehydrocoupling of alcohols, phenols, amines, thiol, selenol, silanols with HBpin was written by Sarkar, Nabin;Sahoo, Rajata Kumar;Patro, A. Ganesh;Nembenna, Sharanappa. And the article was included in Polyhedron in 2022.Recommanded Product: 105-13-5 This article mentions the following:

A popular N,N’-chelated NacNac analog, i.e., conjugated bis-guanidinate (CBG) stabilized aluminum dihydride LAlH₂ [1; L = ArNC(ArNH):NC:(NHAr)NAr, where Ar = 2,6-Et₂-C₆H₃], demonstrates excellent catalytic hydroboration of a wide array of carbonyls with pinacolborane (HBpin) under neat conditions with good tolerance of reducible functional groups such as alkyl, alkene, halide, nitrile, nitro, ester, amide, and heteroaryl. In addition, we investigated complex 1 catalyzed cross-dehydrocoupling (CDC) of alcs., phenols, amines, thiol, selenol, and silanols with HBpin under mild reaction conditions. Furthermore, several control experiments have been performed to understand the mechanisms in hydroboration and CDC reactions. All corresponding catalytic intermediates have been identified and characterized by ¹H and ¹³C{¹H} NMR spectroscopic methods. In contrast to several reports on metal-catalyzed hydroboration of carbonyls, this is the second report for the mol. aluminum catalyzed CDC of organic substrates with HBpin. In the experiment, the researchers used many compounds, for example, (4-Methoxyphenyl)methanol (cas: 105-13-5Recommanded Product: 105-13-5).

(4-Methoxyphenyl)methanol (cas: 105-13-5) 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: 105-13-5

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

Anion resonances and above-threshold dynamics of coenzyme Q₀ was written by Bull, James N.;West, Christopher W.;Verlet, Jan R. R.. And the article was included in Physical Chemistry Chemical Physics in 2015.Recommanded Product: 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione This article mentions the following:

Temporary radical anions (resonances) of isolated co enzyme Q₀ (CQ₀) and their associated above-threshold dynamics have been studied using frequency-, angle-, and time-resolved photoelectron imaging (FAT-PI). Exptl. energetics and dynamics are supported with ab initio calculations All results support that CQ₀ exhibits similar resonances and energetics compared with the smaller para-benzoquinone subunit, which is commonly considered as a prototype electrophore for larger biol. para-quinone species. However, the above-threshold dynamics in CQ₀ relative to para-benzoquinone show significantly enhanced prompt detachment compared with internal conversion, particularly around the photoexcitation energy of 3.10 eV. The change in dynamics can be attributed to a combination of an increase in the shape character of the optically-accessible resonance at this energy, a decrease in the autodetachment lifetime due to the higher d. of states in the neutral, and a decrease in the probability that the wavepacket formed in the Franck-Condon window can access the local conical intersection in CQ₀ over the timescale of autodetachment. Overall, this study serves as a clear example in understanding the trends in spectroscopy and dynamics in relating a simple prototypical para-quinone electrophore to a more complex biochem. species. In the experiment, the researchers used many compounds, for example, 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione (cas: 605-94-7Recommanded Product: 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. 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: 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione

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

NNO Pincer Ligand-Supported Palladium(II) Complexes: Direct Synthesis of Quinazolines via Acceptorless Double Dehydrogenative Coupling of Alcohols was written by Sundarraman, Balaji;Rengan, Ramesh;Semeril, David. And the article was included in Organometallics in 2022.Application of 105-13-5 This article mentions the following:

A sustainable approach for the synthesis of substituted quinazolines by sequential acceptorless dehydrogenative coupling of 2-aminobenzyl alc. with alcs. using new Pd(II)-NNO pincer-type complexes as catalysts is reported. Air-stable Pd(II) complexes [Pd(L)(PPh₃)] (L = 4-substituted Me-2-pyrrolyl benzhydrazone ligands) were synthesized, and their compositions were recognized by anal. and spectral methods (FTIR, NMR, and high-resolution mass spectrometry (HRMS)). Single-crystal x-ray crystallog. confirmed the tridentate coordination of the ligands and the existence of square-planar geometry around the metal ion. A wide range of substituted quinazoline derivatives was synthesized from double dehydrogenation of benzyl alcs. using 1.5 mol % catalyst loading with a maximum of 93% yield. The formation of aminobenzaldehyde and benzaldehyde intermediates via a double dehydrogenative coupling reaction was confirmed by control experiments In the experiment, the researchers used many compounds, for example, (4-Methoxyphenyl)methanol (cas: 105-13-5Application of 105-13-5).

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

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

Michael acceptor containing drugs are a novel class of 5-lipoxygenase inhibitor targeting the surface cysteines C416 and C418 was written by Maucher, Isabelle V.;Ruehl, Michael;Kretschmer, Simon B. M.;Hofmann, Bettina;Kuehn, Benjamin;Fettel, Jasmin;Vogel, Anja;Fluegel, Karsten T.;Manolikakes, Georg;Hellmuth, Nadine;Haefner, Ann-Kathrin;Golghalyani, Vahid;Ball, Ann-Katrin;Piesche, Matthias;Matrone, Carmela;Geisslinger, Gerd;Parnham, Michael J.;Karas, Michael;Steinhilber, Dieter;Roos, Jessica;Maier, Thorsten J.. And the article was included in Biochemical Pharmacology (Amsterdam, Netherlands) in 2017.Related Products of 605-94-7 This article mentions the following:

Recently, we published that nitro-fatty acids (NFA) are potent electrophilic mols. which inhibit 5-lipoxygenase (5-LO) by interacting catalytically with cysteine residues next to a substrate entry channel. The electrophilicity is derived from an intramol. Michael acceptor moiety consisting of an electron-withdrawing group in close proximity to a double bond. The potential of the Michael acceptor moiety to interact with functionally relevant cysteines of proteins potentially renders them effective and sustained enzyme activity modulators. We screened a large library of naturally derived and synthetic electrophilic compounds to investigate whether other types of Michael acceptor containing drugs suppress 5-LO enzyme activity. The activity was measured by assessing the effect on the 5-LO product formation of intact human polymorphonuclear leukocytes. We demonstrated that a number of structurally different compounds were suppressive in the activity assays and showed that Michael acceptors of the quinone and nitro-alkene group produced the strongest inhibition of 5-LO product formation. Reactivity with the catalytically relevant cysteines 416 and 418 was confirmed using mutated recombinant 5-LO and mass spectrometric anal. (MALDI-MS). In the present study, we show for the first time that a number of well-recognized naturally occurring or synthetic anti-inflammatory compounds carrying a Michael acceptor, such as thymoquinone (TQ), the paracetamol metabolite NAPQI, the 5-LO inhibitor AA-861, and bardoxolone Me (also known as RTA 402 or CDDO-Me ester) are direct covalent 5-LO enzyme inhibitors that target the catalytically relevant cysteines 416 and 418. In the experiment, the researchers used many compounds, for example, 2,3-Dimethoxy-5-methylcyclohexa-2,5-diene-1,4-dione (cas: 605-94-7Related Products of 605-94-7).

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. 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.Related Products of 605-94-7

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

Direct transformation of fatty acid-derived monomers from dimer acid manufacturing into valuable bio-plasticizers with high plasticization and compatibilization was written by Tan, Jihuai;Fu, Qinghe;Qu, Yongquan;Wang, Fan;Wang, Wengeng;Wang, Fang;Cao, Yunfeng;Zhu, Xinbao. And the article was included in Journal of Cleaner Production in 2021.Recommanded Product: 111-77-3 This article mentions the following:

Direct transformation of monomer fatty acids derived from the dimer acid manufacturing into high value-added green plasticizers represents a sustainable approach for reutilizing industrial wastes. However, this process is challenging due to the few double bonds and long-chain alkyl in monomer fatty acid-based derivatives, resulting in poor compatibility with polymer matrix and inferior plasticization. Herein, we develop a sustainable and low-cost strategy via direct esterification between monomer fatty acids and polyethylene glycol Me ether to produce plasticizers featured by high plasticization and compatibilization. The performances of monomer acid-based ethoxylated esters as resulting plasticizers for nitrile butadiene rubber were highly structure-dependent. Extensive experiments demonstrated that oxethyl unit played critical roles in both improving the compatibility between monomer acid-based ethoxylated esters and nitrile butadiene rubber and in promoting the dispersion of carbon black in nitrile butadiene rubber matrix. Specially, the processing, freezing resistance, oil resistance, thermal and mech. stabilities of nitrile butadiene rubber plasticized by monomer acid-based ethoxylated esters with three or four oxethyl units were comparable or better than those of nitrile butadiene rubber blended with dioctyl phthalate. This study opens a simple, general and industrialized strategy to produce valuable and sustainable plasticizers as alternatives of toxic dioctyl phthalate. 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. 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.Recommanded Product: 111-77-3

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

Rongalite-Mediated Transition Metal- and Hydride-Free Chemoselective Reduction of α-Keto Esters and α-Keto Amides was written by Golla, Sivaparwathi;Kokatla, Hari Prasad. And the article was included in Journal of Organic Chemistry in 2022.Computed Properties of C8H10O2 This article mentions the following:

A transition metal- and hydride-free protocol was developed for the chemoselective reduction of α-keto esters and αketo amides using rongalite as a reducing agent. Here, rongalite acts as a hydride-free reducing agent via a radical mechanism. This protocol offered the synthesis of a wide range of α-hydroxy esters ArCHOHC(O)OR [Ar = Ph, 4-MeC₆H₄, 1-naphthyl, etc.; R = Et, i-Pr, Bn, etc.] and α-hydroxy amides ArCHOHC(O)NR¹R² [Ar = Ph, 4-MeC₆H₄, 4-MeOC₆H₄, etc.; R¹ = H, Me; R² = Ph, 4-MeC₆H₄, Bn, etc.] with 85-98% yields. This chemoselective method was compatible with other reducible functionalities such as halides, alkenes, amides and nitriles. The use of inexpensive rongalite (ca. $0.03/1 g), mild reaction conditions, and gram-scale synthesis were some of the key features of this methodol. Also, cyclandelate, a vasodilator drug, was synthesized in gram scale with 79% yield. 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. 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.Computed Properties of C8H10O2

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

Arene Ru (II)-catalyzed facile synthesis of N-acylhydrazones via acceptorless dehydrogenative coupling strategy was written by Sundar, Saranya;Rengan, Ramesh;Pennamuthiriyan, Anandaraj;Semeril, David. And the article was included in Applied Organometallic Chemistry in 2022.Formula: C8H10O2 This article mentions the following:

A facile catalytic one-pot synthesis of N-acylhydrazones via acceptorless dehydrogenative coupling of readily available alcs. and benzohydrazides (R₂CONHNH₂) using arene ruthenium (II) complexes was described. The coupling of alcs. with various benzohydrazides using ruthenium catalysts provide a wide range of N-acylhydrazones in good to excellent yields (63-93%; 32 examples). The present protocol offers high selectivity of hydrazones without any alkylated products and tolerates a range of functional groups. Control experiments indicate that the mechanism proceeds via acceptorless dehydrogenation of alcs., and hydrogen and water are the sole byproducts. The gram scale synthesis illustrates the usefulness of the present strategy. In the experiment, the researchers used many compounds, for example, (4-Methoxyphenyl)methanol (cas: 105-13-5Formula: C8H10O2).

(4-Methoxyphenyl)methanol (cas: 105-13-5) 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.Formula: C8H10O2

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

Application of gold and palladium nanoparticles supported on polymelamine microspheres in the oxidation of 1-phenylethanol and some other phenyl substituted alcohols was written by Storm, Ene;Maggott, Emile D.;Mashazi, Philani;Nyokong, Tebello;Malgas-Enus, Rehana;Mapolie, Selwyn F.. And the article was included in Molecular Catalysis in 2022.Related Products of 105-13-5 This article mentions the following:

Melamine formaldehyde and melamine resorcinol formaldehyde microspheres were decorated with Au and Pd nanoparticles and applied as heterogeneous catalysts in the oxidation of 1-phenylethanol. The catalysts showed similar activities irresp. of the support employed. Moderate conversion activities of 48-50% were achieved when using acetonitrile as solvent; however, when employing water as solvent, the supported catalysts formed a three-phase, emulsion system which facilitated the catalytic conversion of 1-phenylethanol to acetophenone at much higher conversions of around 83%. The oxidant, TBHP, decomposed rapidly in acetonitrile, while it remained stable in aqueous solution, leading to the enhanced activities observed when using water as solvent. These systems also proved to be recyclable for up to five cycles, with only slight loss of activity observed; this can be attributed to the phys. loss of catalyst during the workup procedure conducted between each cycle. In the experiment, the researchers used many compounds, for example, (4-Methoxyphenyl)methanol (cas: 105-13-5Related Products of 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. 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.Related Products of 105-13-5

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