Category: 33100-27-5

33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane, molecular formula is C10H20O5, belongs to chiral-catalyst compound, is a common compound. In a patnet, once mentioned the new application about 33100-27-5, COA of Formula: C10H20O5

The invention concerns a compound of the formula I, wherein Ar1 is optionally substituted phenyl or naphthyl; A1 is (1-6C)alkylene, (3-6C)alkenylene, (3-6C)alkynylene or cyclo(3-6C)alkylene; Ar2 is optionally substituted phenylene, or a 6 membered heterocyclene moiety containing up to three nitrogen atoms; R1 is hydrogen, (1-6C)alkyl, (3-6C)alkenyl, (3-6C)alkynyl, cyano-(1-4C)alkyl or (2-4C)alkanoyl, or optionally substituted benzoyl; wherein R2 is hydrogen, (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl or substituted (1-4C)alkyl; and wherein R3 is hydroxy-(1-4C)alkyl, mercapto-(1-4C)alkyl, (1-4C)alkoxy-(1-4C)alkyl, (3-4C)alkenyloxy-(1-4C)alkyl, (3-4C)alkynyloxy-(1-4C)alkyl, (1-4C)alkoxy-(2-4C)alkoxy-(1-4C)alkyl, (1-4C)alkylthio-(1-4C)alkyl, (1-4C)alkylsulphinyl-(1-4C)alkyl, (1-4C)alkylsulphonyl-(1-4C)alkyl, (1-4C)alkoxycarbonyl-(1-4C)alkyl, (2-4C)alkanoyl-(1-4C)alkyl, (2-4C)alkanoyloxy-(1-4C)alkyl or cyano-(1-4C)alkyl; or R3 is oxiranyl, oxetanyl, tetrahydrofuranyl or tetrahydropyranyl; or a pharmaceutically-acceptable salt thereof. The compounds of the invention are inhibitors of the enzyme 5-lipoxygenase.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.COA of Formula: C10H20O5. In my other articles, you can also check out more blogs about 33100-27-5

Reference：
Chiral Catalysts,
Chiral catalysts – SlideShare

Related Products of 33100-27-5, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 33100-27-5, C10H20O5. A document type is Article, introducing its new discovery.

The ligand (L) and halide effects of a series of iron complexes (FeX2 or FeX3, X = Cl, Br)/L supported by carbon (Cp2Fe2(I)(CO)4 > Cp2Fe > Fe(CO)5 > (Ph2PCp)2Fe), nitrogen (phthalocyanine ? bpy ? MeO-bpy ? PMDETA > phen), halide (FeXmY4-m/Bu4N, X, Y = Cl ? Br > I), oxygen (12-crown-4 ? 15-crown-5 ? dibenzo-18-crown-6) and phosphorous (P[Ph(2,4,6-OMe)3]3 > P(t-Bu)3 ? P(n-Bu)3, PPh3, P[Ph(4-CF3)]3, P(C6F5)3) ligands, as well as ligand-free FeX3, were evaluated in the normal, ICAR, and photo-ATRP of butadiene (BD) initiated from bromoesters, alpha,alpha-dichloro-p-xylene, or FeX3 in toluene at 110 C. Good polymerization control was observed in many cases, and two clear trends i.e. P[Ph(OMe)3]3 ? Bu4NX > crown ethers > amines > C-ligands and FeCl2, FeCl3 ? FeBr2, FeBr3 occur consistently across all polymerizations. These effects correlate with the higher stability of the allyl PBD-Cl vs. PBD-Br chain ends and with FeCl3 likely being a better deactivator than FeBr3. Conversely, while basic enough to reduce FeX3, P[Ph(2,4,6-OMe)3]3 is not nucleophilic enough to quaternize PBD-X in the apolar toluene and successfully enables a faster activation/deactivation equilibrium than all other ligands. As such, e.g. N-ATRP with [BD]/[R-Br]/[FeCl3]/P[Ph(2,4,6-OMe)3]3 = 100/1/2/3 affords a linear Mnvs. conversion profile with PDI as low as 1.15-1.2 and a halide chain end functionality (CEF) = 0.65 at up to 50% conversion. While controlled polymerizations occur in photo-ATRP even without ligand and initiator, photoirradiation of catalytic N-ATRP with BD/R-Br/FeCl3/P[Ph(2,4,6-OMe)3]3 = 100/1/0.05/0.15 significantly improves the rate (×10 vs. dark), conversion (up to 70%) and X-CEF (0.9) via the additional initiation afforded by FeX3 photolysis, albeit with a slight PDI increase to ?1.4. Thus, Fe-mediated BD-ATRP is achievable, and the rational selection of the polymerization variables enables minimization of side reactions and the successful synthesis of well-defined PBD with a wide range of molecular weights, narrow PDI and reasonably high X-CEF, suitable for the preparation of e.g. block copolymers.

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Chiral Catalysts,
Chiral catalysts – SlideShare

Reference of 33100-27-5. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane. In a document type is Article, introducing its new discovery.

The reduction of 2,4,6-tri(4-pyridyl)-1,3,5-triazine (TPT) with alkali metals resulted in four radical anion salts (1, 2, 4 and 5) and one diradical dianion salt (3). Single-crystal X-ray diffraction and electron paramagnetic resonance (EPR) spectroscopy reveal that 1 contains the monoradical anion TPT.? stacked in one-dimensional (1D) with K+(18c6) and 2 can be viewed as a 1D magnetic chain of TPT.?, while 4 and 5 form radical metal-organic frameworks (RMOFs). 1D pore passages, with a diameter of 6.0 A, containing solvent molecules were observed in 5. Variable-temperature EPR measurements show that 3 has an open-shell singlet ground state that can be excited to a triplet state, consistent with theoretical calculation. The work suggests that the direct reduction approach could lead to the formation of RMOFs.

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Reference：
Chiral Catalysts,
Chiral catalysts – SlideShare

Related Products of 33100-27-5, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 33100-27-5, C10H20O5. A document type is Patent, introducing its new discovery.

A process for the conversion of an alkylene oxide to the corresponding alkylene glycol in the presence of a catalytic composition, carbon dioxide and water, wherein the catalytic composition comprises a halide, a metalate and optionally a macrocyclic chelating compound.

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Chiral Catalysts,
Chiral catalysts – SlideShare

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane, molecular formula is C10H20O5. In a Article，once mentioned of 33100-27-5, Computed Properties of C10H20O5

As compared with symmetrical 3m-crown-m, the ring-contracted(3m-1)-crown-m showed drastic decrease in cation-binding ability, which is attributable not to the diminished cavity size but to the disordered conformation induced by ring contraction.

The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 33100-27-5 is helpful to your research., Computed Properties of C10H20O5

Reference：
Chiral Catalysts,
Chiral catalysts – SlideShare

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane, molecular formula is C10H20O5. In a Article，once mentioned of 33100-27-5, SDS of cas: 33100-27-5

A series of crown ether complex cation ionic liquids (CECILs) were designed, synthesised and characterised by NMR spectroscopy, HRMS, thermogravimetric differential thermal analysis (TG-DTA) and elemental analysis. Their applications in various organic reactions were investigated: [15-C-5Na][OH], [15-C-5Na][OAc], [18-C-6K][OH] and [18-C-6K][OAc] (15-C-5=[15]crown-5; 18-C-6=[18]crown-6) efficiently catalysed the Michael addition of alkenes and relevant nucleophiles; [18-C-6K][OH] and [15-C-5Na][OH] effectively catalysed the Henry reaction of nitromethane and aromatic aldehydes; [18-C-6K][OH] has excellent catalytic efficiency for Knoevenagel condensation of aromatic aldehydes and malononitrile; PdCl2/[18-C-6K] 3[PO4]/K2CO3 efficaciously catalysed the Heck reaction of olefins and aromatic halides; [18-C-6K][BrO3] can be used as both oxidant and solvent in the oxidation reaction of aromatic alcohols. The CECIL catalysts [15-C-5Na][OH] (Michael addition) and [18-C-6K][OH] (Henry reaction) can be recycled and reused several times without obvious loss of activity and their recovery is very simple.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.SDS of cas: 33100-27-5, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 33100-27-5, in my other articles.

Reference：
Chiral Catalysts,
Chiral catalysts – SlideShare

Electric Literature of 33100-27-5. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane. In a document type is Article, introducing its new discovery.

The interaction of five crown ethers, 15-crown-5, 18-crown-6, benzo-15-crown-5, dibenzo-18-crown-6, and dibenzo-24-crown-8 with 2,3,5,6 – tetracyano pyrazine has been studied by spectroscopic methods.The association constants and thermodynamic parameters of the 1:1 complexes formed by donor ethers with the acceptor have been evaluated.There is an indication that oxygens of the ethers and aryl part of the ether act cooperatively in binding of the acceptor.

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Reference：
Chiral Catalysts,
Chiral catalysts – SlideShare

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane, molecular formula is C10H20O5. In a Article，once mentioned of 33100-27-5, name: 1,4,7,10,13-Pentaoxacyclopentadecane

The sodium complexes [NaC5H5(15-crown-5)] (1a), [NaC9H7(15-crown-5)] (1b), and [NaC13H9(15-crown-5)] (1c, C5H5 = cyclopentadienyl, C9H7 = indenyl, C13H9 = fluorenyl) were synthesized from NaC5H5, NaC9H7, NaC13H9, and 15-crown-5. Single crystal X-ray diffraction analyses were carried out for all three compounds 1a, 1b, 1c, and show that monomeric units were present in the solid state with the organic aromatic anion coordinated to the sodium cation via the five-membered ring.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.name: 1,4,7,10,13-Pentaoxacyclopentadecane, you can also check out more blogs about33100-27-5

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Chiral Catalysts,
Chiral catalysts – SlideShare

Related Products of 33100-27-5. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane

The [TaCl2*C8H16O5][TaCl6], [H2Cl*(15-crown-5)2][TaCl6], [H2Cl*CH3CN*(15-crown-5)][TaCl6], and [H3O*(18-crown-6)][TaCl6] ionic complexes were prepared by reacting anhydrous TaCl5 with 15-crown-5 in dry acetonitrile.The formation of these complexes is associated with the reactions of opening and cleavage of a macrocycle under the action of a strong Lewis acid (tantalum pentachloride) or the products of its reactions with the fragments of a crown ether molecule. These reactions led to the emergence in the system of a great quantity of water, hydrogen chloride (due to hydrolysis), and non-identified organic compounds. Upon the introduction of a fourth component into the system, ie., a tertiary amine or a quaternary ammonium salt, the [(C2H5)3NH*(15-crown-5)][TaCl6] and [NMe4*TaOCl4]3*CH3CN complexes were obtained. The formation of these complexes confirms the presence of hydrolysis in solution. All the obtained compounds were studied by X-ray crystallography and IR spectroscopy.

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Chiral Catalysts,
Chiral catalysts – SlideShare

In an article, published in an article, once mentioned the application of 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane,molecular formula is C10H20O5, is a conventional compound. this article was the specific content is as follows.Computed Properties of C10H20O5

Reactions of 12-crown-4, 15-crown-5, 18-crown-6, and 21-crown-7, as well as the acyclic analogs triglyme, tetraglyme, and penta(ethylene glycol), with Li+, Na+, K+, Rb+, and Cs+, are observed and characterized using Fourier transform ion cyclotron resonance mass spectrometry (FTICR/MS) and tandem quadrupole mass spectrometry in the gas phase to obtain information on intrinsic host-guest interactions in the absence of the complicating effects of solvation. Radiatively stabilized attachment of the cations to the ligands is a rapid process, with rates in some cases a factor of 2 or more times the Langevin collision rate. The attachment efficiencies increase linearly with cation charge density, suggesting that attachment involves charge-induced rearrangement of the ligands to adopt favorable binding conformations. Attachment is more efficient, and more strongly dependent on charge density, for the cyclic ligands than for their acyclic counterparts. Metal-ligand undergo reaction with a second ligand to form 1:2 metal-ligand complexes, or “sandwiches”. The efficiencies of crown sandwich formation are strongly dependent on the ratio of cation radius to binding cavity radius; when the ratio is than one, the efficiencies are too low to measure, but they become measurable at a ratio of 1:1 and increase by about 4 orders of magnitude as the ratio incrrases to about 1.25:1, At higher ratio values, efficiencies fall off slowly, probably due to decreasing cation density. The relative cation affinities of the various ligands are compared both collision-induced dissociation “kinetic” methods, with the tandem quadrupole, and using “bracketing” cation reactions in the FTICR. The tandem quadrupole results are in some cases dependent on the means of producing the 1;2 metal-ligand complexes, and in some cases they do not agree with the FTICR results. The two methods are compared and reasons for the discrepancies are discussed. We favor the FTICR results, which indicate that proton and alkali cation affinities increase with an increase in the number of oxygen donor atoms in the crowns. Equilibria observed in metal exchange reactions between 18-crown-6 and 21-crown-7 were found to always lie on the side of the cation bound to the larger ligand, but K+ has the smallest equilibrium constant of any of the alkali metals, reflecting the excellent size match between K+ and 18-crown-6.

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Reference：
Chiral Catalysts,
Chiral catalysts – SlideShare