Month: April 2022

Related Products of 63295-48-7. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Iron(III) trifluoromethanesulfonate, is researched, Molecular C3F9FeO9S3, CAS is 63295-48-7, about Solution processed intrinsically conductive polymer films with high thermoelectric properties and good air stability. Author is Yao, Hongyan; Fan, Zeng; Li, Pengcheng; Li, Bichen; Guan, Xin; Du, Donghe; Ouyang, Jianyong.

It is important to study thermoelec. (TE) materials because they can directly convert heat into electricity. Although intrinsically conducting polymers have the advantages of nontoxicity, low cost, high mech. flexibility and low thermal conductivity, their thermoelec. properties must be significantly improved for practical application. Here, we report a solution-processed conducting polymer, poly(3,4-ethylenedioxythiophene):trifluoromethanesulfonate (PEDOT:OTf), with very high TE properties. As-prepared PEDOT:OTf films from their precursor solution can exhibit a power factor of 346 ± 39 μW m-1 K-2. The power factor can be further enhanced by a post treatment with NaOH or a reducing agent like glucose or ascorbic acid. The NaOH treatment can give rise to a power factor of 568 ± 64 μW m-1 K-2 with a Seebeck coefficient of 49.2 ± 1.4 μV K-1 and an elec. conductivity of 2342 ± 98 S cm-1. This power factor is higher than those obtained by treatment with the reducing agents. The different power factors by NaOH and reducing agent treatments are attributed to their different effects on the doping. The NaOH treatment can remove the protonic doping while the reducing agents can lower the normal oxidation level of PEDOT. The charge carriers due to protonic acid doping have lower energy, and thus the removal of protonic acid doping can significantly enhance the Seebeck coefficient while not lowering the elec. conductivity too much.

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Reference:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1-(2-chloropyridine-4-yl)ethanone(SMILESS: CC(=O)C1=CC(Cl)=NC=C1,cas:23794-15-2) is researched.Product Details of 3230-65-7. The article 《Iron-Catalyzed Arylation of Heterocycles via Directed C-H Bond Activation [Erratum to document cited in CA160:248695]》 in relation to this compound, is published in Organic Letters. Let’s take a look at the latest research on this compound (cas:23794-15-2).

On page 868, Scheme 1 contained inverted references; the corrected scheme is given. On page 870, the text accompanying Table 3 contained an incorrect substrate name; the correct substrate is 4-methylthiophene. On page 871, reference 6b contained misspelled names; the corrected reference is given.

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bin Shawkataly, Omar; Pankhi, Mohd. Aslam A.; Fun, Hoong-Kun; Yeap, Chin Sing published an article about the compound: Tris(3,5-bis(trifluoromethyl)phenyl)phosphine( cas:175136-62-6,SMILESS:FC(C1=CC(C(F)(F)F)=CC(P(C2=CC(C(F)(F)F)=CC(C(F)(F)F)=C2)C3=CC(C(F)(F)F)=CC(C(F)(F)F)=C3)=C1)(F)F ).Safety of Tris(3,5-bis(trifluoromethyl)phenyl)phosphine. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:175136-62-6) through the article.

Six trinuclear monosubstituted complexes of the type Ru3(CO)11L were synthesized by the reaction of Ru3(CO)12 with phosphine ligands [L = Ph2P(C6H4Me-p), Ph2PC6F5, P(3,5-CF3C6H3)3, P(C6H4Cl-p)3, P(C6H4Me-p)3, PhP(C6H4OCH3-p)2] using the radical anion catalyzed method. The structures of the resulting clusters were elucidated by elemental analyses and spectroscopic methods, including IR, 1H NMR, 13C NMR and 31P NMR spectroscopy. 31P NMR spectra of the complexes Ru3(CO)11P(C6H4Me-p)3 and Ru3(CO)11P(C6H4Cl-p)3 showed splitting of the phosphorus signals into triplets. X-ray crystallog. studies of five complexes were carried out. Out of the three unidentate tertiary phosphine complexes, Ru3(CO)11P(C6H4Me-p)3 and Ru3(CO)11P(C6H4Cl-p)3 are ordered while the complex Ru3(CO)11P(3,5-CF3-C6H3)3 exhibits disorder with respect to the trifluoromethyl groups. In all the five monosubstituted complexes, the ligand occupies the equatorial position due to steric reasons and coordination of the ligands are only at the phosphorus atom. The effect of substitution resulted in significant differences in the Ru-Ru distances. Out of the three Ru-Ru bonds, the one which is cis to the ligand is noticeably longer and the mean value for this longest Ru-Ru bond is 2.889 Å, while the mean value for the two shorter Ru-Ru bonds is 2.841 Å. The P-C distances are in the range 2.333(6)-2.354(6) Å. The equatorial Ru-CO moieties are almost linear and the average value for all the five complexes studied range from 176.3 to 177.6°, while the axial CO groups are slightly bent, ranging from 173.8 to 174.1°.

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Product Details of 144222-22-0. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1-Boc-4-(Aminomethyl)piperidine, is researched, Molecular C11H22N2O2, CAS is 144222-22-0, about Rh(III)-catalyzed three-component syn-carboamination of alkenes using arylboronic acids and dioxazolones. Author is Lee, Sumin; Rovis, Tomislav.

Herein we report a Rh(III)-catalyzed three-component carboamination of alkenes from readily available aryl boronic acids as a carbon source and dioxazolones as nitrogen electrophiles. This protocol provides facile access to valuable amine products including α-amino acid derivatives in good yield and excellent regioselectivity without the need for a directing functionality. A series of experiments suggest a mechanism in which the Rh(III) catalyst undergoes transmetalation with the aryl boronic acid followed by turnover limiting, alkene migratory insertion into the Rh(III)-aryl bond. Subsequently, fast Rh-nitrene formation provides the syn-carboamination product selectively after reductive elimination and proto-demetalation. Importantly, the protocol provides 3-component coupling products in preference to a variety of 2-component undesired byproducts.

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Koecher, S. S.; Heydenreich, T.; Zhang, Y.; Reddy, G. N. M.; Caldarelli, S.; Yuan, H.; Glaser, S. J. published an article about the compound: 2,3-Dibromopropionic acid( cas:600-05-5,SMILESS:O=C(O)C(Br)CBr ).Name: 2,3-Dibromopropionic acid. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:600-05-5) through the article.

Here the authors study the optimum efficiency of the excitation of maximum quantum (MaxQ) coherence using anal. and numerical methods based on optimal control theory. The theor. limit of the achievable MaxQ amplitude and the min. time to achieve this limit are explored for a set of model systems consisting of up to five coupled spins. In addition to arbitrary pulse shapes, two simple pulse sequence families of practical interest are considered in the optimizations. Compared to conventional approaches, substantial gains were found both in terms of the achieved MaxQ amplitude and in pulse sequence durations. For a model system, theor. predicted gains of a factor of three compared to the conventional pulse sequence were exptl. demonstrated. Motivated by the numerical results, also two novel anal. transfer schemes were found: Compared to conventional approaches based on nonselective pulses and delays, double-quantum coherence in two-spin systems can be created twice as fast using isotropic mixing and hard spin-selective pulses. Also in a chain of three weakly coupled spins with the same coupling constants, triple-quantum coherence can be created in a time-optimal fashion using so-called geodesic pulses. (c) 2016 American Institute of Physics.

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Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 175136-62-6, is researched, Molecular C24H9F18P, about Kinetic Studies on the Cobalt-Catalyzed Norbornadiene Intermolecular Pauson-Khand Reaction, the main research direction is kinetics mechanism cobalt catalyzed norbornadiene intermol Pauson Khand silylacetylene; cobalt carbonyl phosphine complex preparation catalyst.COA of Formula: C24H9F18P.

The kinetics for the cobalt-catalyzed intermol. Pauson-Khand reaction (PKR) between (trimethylsilyl)acetylene and norbornadiene (NBD) at a constant CO pressure has been studied by in situ FT-IR. The rate dependence on catalyst and substrate concentrations was examined, and it was found that the process is -1.9 order with respect to CO pressure, zero order with respect to acetylene, 0.3-1.2 order with respect to NBD, and 1.3 order with respect to the Co2(CO)8 catalyst. Catalytic reaction intermediates were examined by their corresponding metal carbonyl IR frequencies. By a one-pot consecutive Pauson-Khand experiment, the NBD-dicobalt hexacarbonyl complex was identified as a catalytically active complex. Co4(CO)12 was also studied as a catalyst source in the PKR. Anal. of the corresponding reaction intermediates by IR demonstrated that Co2(CO)8 and Co4(CO)12 provide identical intermediate profiles upon reaction with TMSC2H. The exptl. measured kinetics are consistent with the alkene insertion being the rate-limiting step in the catalytic PKR. Finally, the effect of phosphine substitution on the catalyst and the use of Lewis acid additives were shown to have a deleterious effect on the reaction rate.

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Piperidine – Wikipedia,
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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1-Boc-4-(Aminomethyl)piperidine, is researched, Molecular C11H22N2O2, CAS is 144222-22-0, about Discovery, Structure-Activity Relationship, and Biological Activity of Histone-Competitive Inhibitors of Histone Acetyltransferases P300/CBP, the main research direction is histone competitive inhibitor histone acetyltransferase discovery SAR anticancer.Quality Control of 1-Boc-4-(Aminomethyl)piperidine.

Histone acetyltransferase (HAT) p300 and its paralog CBP acetylate histone lysine side chains and play critical roles in regulating gene transcription. The HAT domain of p300/CBP is a potential drug target for cancer. Through compound screening and medicinal chem., novel inhibitors of p300/CBP HAT with their IC50 values as low as 620 nM were discovered. The most potent inhibitor is competitive against histone substrates and exhibits a high selectivity for p300/CBP. It inhibited cellular acetylation and had strong activity with EC50 of 1-3μM against proliferation of several tumor cell lines. Gene expression profiling in estrogen receptor (ER)-pos. breast cancer MCF-7 cells showed that inhibitor treatment recapitulated siRNA-mediated p300 knockdown, inhibited ER-mediated gene transcription, and suppressed expression of numerous cancer-related gene signatures. These results demonstrate that the inhibitor is not only a useful probe for biol. studies of p300/CBP HAT but also a pharmacol. lead for further drug development targeting cancer.

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Piperidine – Wikipedia,
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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Iron(III) trifluoromethanesulfonate(SMILESS: O=S(C(F)(F)F)([O-])=O.O=S(C(F)(F)F)([O-])=O.O=S(C(F)(F)F)([O-])=O.[Fe+3],cas:63295-48-7) is researched.Related Products of 600-05-5. The article 《Synthesis, characterization, and crystal structures of 2-[(3-chloropyridin-2-yl)hydrazonemethyl]-6-ethoxyphenol and its iron(III) complex》 in relation to this compound, is published in Inorganic and Nano-Metal Chemistry. Let’s take a look at the latest research on this compound (cas:63295-48-7).

A new Schiff base 2-[(3-chloropyridin-2-yl)hydrazonemethyl]-6-ethoxyphenol (HL) and its new iron(III) complex were synthesized and characterized by elemental anal., IR spectra, and single-crystal x-ray determination The Schiff base was crystallized in the triclinic space group P1_, and the complex was crystallized in the monoclinic space group Cc. The particular interest is to study the coordination behavior of the Schiff base with iron. Single-crystal X-ray diffraction indicated that the Schiff base ligand coordinates to the Fe atom through the phenolate O, imine N, and pyridine N atoms. The asym. unit of the Schiff base contains two Schiff base mols. and one methanol mol. The asym. unit of the complex contains two mononuclear iron(III) complex cations and two trifluoromethylsulfate anions. The Fe atom is six-coordinated in an octahedral geometry. The coordination of the Schiff base to the Fe atom is also reflected in the IR spectra. Crystal structures of the compounds are stabilized by hydrogen bonds.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Reaction of amides and esters of α,β-dibromopropionic acids with triphenylphosphine》. Authors are Tung, C. C.; Speziale, A. J..The article about the compound:2,3-Dibromopropionic acidcas:600-05-5,SMILESS:O=C(O)C(Br)CBr).Related Products of 600-05-5. Through the article, more information about this compound (cas:600-05-5) is conveyed.

The debromination of the dibromides derived from CH2:CMeCO2Et, CH2:CHCO2Me, and Me2C: CHCONMe2 with Ph3P is reported. However, BrCH2CHBrCONH2 with Ph3P underwent displacement of the α-Br and dehydrohalogenation to produce the ylide, BrCH2C(:PPh3)CONH2.

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SDS of cas: 63295-48-7. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Iron(III) trifluoromethanesulfonate, is researched, Molecular C3F9FeO9S3, CAS is 63295-48-7, about Fe(OTf)3 versus Bi(OTf)3 as Mild Catalysts in Epoxide Oxidative Ring-Opening, Urea α-Diketone Condensation, and Glycoluril Diether Synthesis. Author is Mandadapu, Vijaybabu; Wu, Feng; Day, Anthony I..

The salt Fe(OTf)3 has been shown to function as an effective catalyst in three different reactions, epoxide oxidative ring-opening to an α-hydroxy ketone, urea α-diketone condensation to form glycolurils, and glycoluril diether synthesis by formaldehyde condensation. In each of these reactions, Fe(OTf)3 was compared to Bi(OTf)3, a viable alternative catalyst with few or no prior examples of this type. Differences and advantages are highlighted but in most cases yields were generally high, and both catalysts outperformed conventional acid catalyzed methods.

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Piperidine – Wikipedia,
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