Tag: M.W:100-200

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, is researched, Molecular C10H24N2, CAS is 111-18-2, about Water balancing.Electric Literature of C10H24N2.

A review. Water management is an important aspect in the operation of alk. exchange membrane fuel cells. Now, a lightly cross-linked norbornene polymer membrane is shown to be able to facilitate optimal water transport, leading to exceptionally high power and c.d. fuel cells. Typically consisting of platinum- based electrodes and water based, acidic polymer membranes,. They are one of the incumbent technologies for light duty vehicles. A major drawback of PEMFCs, however, is that their use of precious metal based electrocatalysts leads to high costsm.

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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: 18362-64-6, is researched, Molecular C9H16O2, about Preparation of optically pure (3S,5S)- and (3R,5R)-2,6-dimethyl-3,5-heptanediol, the main research direction is tartaric acid nickel hydrogenation catalyst; optically pure dimethylheptanediol; heptanediol dimethyl optically pure; asym hydrogenation dimethylheptanedione; heptanedione dimethyl asym hydrogenation.COA of Formula: C9H16O2.

Optically pure 2,6-dimethyl-3,5-heptanediol (I) a new chiral auxiliary, has been prepared by the asym. hydrogenation of 2,6-dimethyl-3.5-heptanedione over tartaric acid NaBr-modified Raney nickel catalyst, and the preferential recrystallization of the hydrogenation product. The absolute configuration of (I) was determined to be 3S,5S by chem. correlation with (-)-Et (S)-3-hydroxy-4-methylpentanoate.

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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Lim, Sunkwon; Lee, Joong Cheol; Sohn, Do Sung; Lee, Wan In; Lee, Ik-Mo researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Application In Synthesis of 2,6-Dimethyl-3,5-heptanedione.They published the article 《A Study on the Development of Chemical Vapor Deposition Precursors. 4. Syntheses and Characterization of New N-Alkoxo-β-ketoiminate Complexes of Niobium and Tantalum》 about this compound( cas:18362-64-6 ) in Chemistry of Materials. Keywords: ethoxide niobium tantalum alkoxoketoiminate complex preparation CVD precursor; thermal decomposition stability niobium tantalum ethoxide alkoxoketoiminate; tantalum oxide film preparation ethoxide alkoxoketoiminate complex precursor; niobium oxide film preparation ethoxide alkoxoketoiminate complex precursor; ketoiminate alkoxo niobium tantalum ethoxide complex preparation CVD precursor. We’ll tell you more about this compound (cas:18362-64-6).

Partial replacement of ethoxide ligands with N-alkoxo-β-ketoiminates in the tantalum or niobium ethoxides resulted in M(N-alkoxo-β-ketoiminate)(OEt)3 (M = Ta and Nb) complexes. Most of these complexes are liquid and showed enhanced thermal and chem. stability, especially toward moisture. These complexes have octahedral geometry with a meridional N-alkoxo-β-ketoiminate ligand and showed fluxional behaviors. All of these precursors, especially the ones with Me groups on both the N-alkoxo and β-ketoiminate backbones, demonstrate considerably higher deposition rates than M2(OEt)10 (M = Ta and Nb), one of the most popular precursors for Ta2O5 and Nb2O5 films. TGA experiments showed that successive decomposition of ethoxide ligands is followed by decomposition of N-alkoxo-β-ketoiminate in the pyrolysis process. Introduction of a Me group onto the N-hydroxyethyl backbone enhanced the thermal stability at lower temperatures and the pyrolysis rate at higher temperatures X-ray diffraction patterns indicate that the deposited films are not crystallized until the substrate temperature goes over 650°. Well-crystallized longish grains were formed in the Ta2O5 film deposited at 700°, but it was found from the depth profile spectra by Auger electron spectroscopy (AES) that the nitrogen and carbon impurities are 2.3% and 4.2%, resp., for the Ta2O5 film deposited at 550°. Heat treatment at 700° in oxygen removed the nitrogen impurity in this Ta2O5 completely, and the residual carbon is negligible from the AES and XPS results.

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Electric Literature of C9H16O2. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about Acid-catalyzed acylation reaction via C-C bond cleavage: a facile and mechanistically defined approach to synthesize 3-acylindoles.

A facile acid-catalyzed acylation of indoles with 1,3-dione as an ecofriendly acylating agent (green chem. method) was developed. This protocol combines a carbon carbon bond (C-C-bond) cleavage and heterocyclic carbon hydrogen bond (C-H bond) functionalization to form new C-C bonds. Based on the detailed mechanistic studies, a credible mechanistic pathway was proposed. Under optimized conditions the synthesis of the target compounds was achieved by a reaction of 1H-indole derivatives with 3-methyl-2,4-pentanedione, 2,4-pentanedione, 3,5-heptanedione, 1,1,1,5,5,5-hexafluoro-2,4-pentanedione, 1,3-diphenyl-1,3-propanedione, 1-phenyl-1,3-butanedione, 3-oxobutanoic acid ester, 2-(acetyl)cyclohexanone using trifluoromethanesulfonic acid as a catalyst. The title compounds thus formed included 1-(1-methyl-1H-indol-3-yl)ethanone derivs, 1-(1-methyl-1H-indol-3-yl)-1-propanone, 2,2,2-trifluoro-1-(1-methyl-1H-indol-3-yl)ethanone.

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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: 111-18-2, is researched, SMILESS is CN(C)CCCCCCN(C)C, Molecular C10H24N2Journal, Article, Chemistry – A European Journal called Direct Synthesis of Nanosheet-Stacked Hierarchical “”Honey Stick-like”” MFI Zeolites by an Aromatic Heterocyclic Dual-Functional Organic Structure-Directing Agent, Author is Wang, Risheng; Peng, Zhihua; Wu, Pingping; Lu, Jinzhi; Rood, Mark J.; Sun, Hongman; Zeng, Jingbin; Wang, Youhe; Yan, Zifeng, the main research direction is MIF zeolite nanosheet catalyst cyclohexane oxidation; Heterocycles; MFI zeolites; nanosheets; self-assembly; stacking interactions.Recommanded Product: 111-18-2.

Soft template designing is the most promising strategy for the synthesis of zeolite nanosheets. MFI nanosheets directed by soft templates (containing long-chain alkyl groups or aromatic groups as hydrophobic component) can be found frequently. However, so far, MFI nanosheets synthesized by soft templates with aromatic heterocycle groups (e. g., s-triazine groups) are rare. Herein, a nanosheet-stacked hierarchical MFI zeolite (NSHM) has been synthesized by using a triply branched s-triazine-based surfactant as a bifunctional organic structure-directing agent. On the basis of a geometrical match relationship, a formation model has been proposed. Synthesized NSHM had abundant mesopores stacked by nanosheets and exhibited a high surface area (430 m2 · g-1). The 1 wt% Pd/NSHM attained a significant increase in yield of cyclohexanol/cyclohexanone mixture (from 66 to 85 %) in the oxidation of cyclohexane compared with Silicalite-1 and SBA-15 as supports.

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ) is researched.Application of 18362-64-6.Sharpe, Paul; Alameddin, N. George; Richardson, David E. published the article 《Alkyl Substituent Effects in the Redox Thermochemistry of Coordination Compounds: Oxidation and Reduction Energetics for Ruthenium Tris(β-diketonate) Complexes in Solution and the Gas Phase》 about this compound( cas:18362-64-6 ) in Journal of the American Chemical Society. Keywords: ruthenium diketonato oxidation reduction thermodn phase; ketonato ruthenium oxidation reduction thermodn phase; free energy ruthenium diketonato oxidation reduction; energetic ruthenium diketonato oxidation reduction phase; oxidation ruthenium diketonato substituent thermodn phase; reduction ruthenium diketonato substituent thermodn phase; solvation ruthenium diketonato oxidation reduction thermodn; substituent ruthenium diketonato oxidation reduction thermodn. Let’s learn more about this compound (cas:18362-64-6).

Alkyl substituent effects in gas-phase and solution redox thermochem. were studied for Ru coordination complexes. The gas-phase free energies of ionization (ΔGi°) and electron attachment (ΔGa°) are compared to electrochem. oxidation and reduction half-wave potentials (E1/2) for six Ru tris(β-diketonate) complexes prepared by a known method (RuL3, where L = CH(COR)2- and R = Me, Et, Pr, Bu, isoPr, and tert-Bu). Values for ΔGi° and ΔGa° were determined from electron-transfer equilibrium measurements by using Fourier transform ICR mass spectrometry. Substituted benzenes and metallocenes were used as reference compounds Cyclic voltammetry was used to determine E1/2 values, which were obtained in DMF and measured relative to the ferrocene/ferrocenium couple. Substitution of Me with larger substituents results in cathodic shifts in both oxidation and reduction potentials, and the solution data correlate well with the sums of Taft alkyl substituent parameters (σI). Gas-phase cations and anions are stabilized relative to the neutral by larger alkyl substituents, rendering ΔGi° less endoergic and ΔGa° more exoergic as the alkyl group size increases. The trends for solution and gas-phase reduction of the neutral Ru(III) complex are therefore reversed. Estimates for the differential solvation free energies for 1-electron oxidation (ΔΔGsolv°(0/+)) and reduction (ΔΔGsolv°(0/-)) are obtained by combining the ΔGi° and ΔGa° data with electrochem. E1/2 data. Values of ΔΔGsolv°(0/-) are less exoergic for complexes with larger alkyl substituents and range from -48 ± 5 kcal mol-1 (R =Me) to -36 ± 5 kcal mol-1 (R = tert-butyl), and these changes in ΔΔGsolv°(0/-) are identified as the cause of the reversal in the trends for gas-phase and solution reduction free energies. But ΔΔGsolv°(0/+) values all fall in the range -19 to -16 kcal mol-1 and show no correlation with the size of the alkyl substituents. Anal. of the gas-phase data by a model of substituent effects based on polarizability and inductive contributions of a group shows that alkyl inductive effects are small in these complexes and that relative stabilities of gas-phase ions are primarily due to differences in polarizability of the alkyl substituents R on the ligands. A similar anal. for R = CF3 complexes suggests that the substantial effect of that group on gas-phase ionization and electron-attachment energies is almost entirely due to a large inductive effect.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about CO2 sensing characteristics of CuO-BaTiO3 film prepared by molecule modulation (2), the main research direction is sensor copper barium titanium oxide film; carbon dioxide gas sensor.Formula: C9H16O2.

Mixed oxide of CuO and BaTiO3 fine powder was prepared by the thermal decomposition of self-assembled organic film, in which C existed in organic phase and BaTiO3 existed in the hydrophobic phase. Since the capacitance of the obtained CuO-BaTiO3 film was increases upon exposure to CO2-CO2 concentration can be estimated with the capacitance of CuO-BaTiO3 mixed oxide film obtained by the decomposition of self-assembled organic film. The CO2 sensing characteristics was strongly affected by the decomposition condition of organic film and it was found that the optimized decomposition temperature was 900°C when calcination period was 3 h.

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Quality Control of 1-Aminopyrrole-2-carboxamide. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1-Aminopyrrole-2-carboxamide, is researched, Molecular C5H7N3O, CAS is 159326-69-9, about Discovery, Optimization, and Evaluation of Potent and Highly Selective PI3Kγ-PI3Kδ Dual Inhibitors. Author is Jia, Hong; Dai, Guangxiu; Su, Weiguo; Xiao, Kun; Weng, Jianyang; Zhang, Zhulin; Wang, Qing; Yuan, Tianhai; Shi, Fuying; Zhang, Zheng; Chen, Wei; Sai, Yang; Wang, Jian; Li, Xiong; Cai, Yu; Yu, Jun; Ren, Ping; Venable, Jennifer; Rao, Tadimeti; Edwards, James P.; Bembenek, Scott D..

An electronic d. model was developed and used to identify a novel pyrrolotriazinone replacement for a quinazolinone, a commonly used moiety to impart selectivity in inhibitors for PI3Kγ and PI3Kδ. Guided by mol. docking, this new specificity piece was then linked to the hinge-binding region of the inhibitor using a novel cyclic moiety. Further structure-activity relationship optimization around the hinge region led to the discovery of candidate 26, a highly potent and selective PI3Kγ-PI3Kδ dual inhibitor with favorable drug metabolism and pharmacokinetic properties in preclin. species.

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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: 159326-69-9, is researched, Molecular C5H7N3O, about Discovery of the Pyrrolo[2,1-f][1,2,4]triazine Nucleus as a New Kinase Inhibitor Template, the main research direction is pyrrolotriazine derivative preparation structure activity VEGF EGFR kinase antitumor.Reference of 1-Aminopyrrole-2-carboxamide.

The pyrrolo[2,1-f][1,2,4]triazine nucleus was identified as a novel kinase inhibitor template which effectively mimics the well-known quinazoline kinase inhibitor scaffold. Attachment of a 4-((3-chloro-4-fluorophenyl)amino) substituent to the template provided potent biochem. inhibitors of the tyrosine kinase activity of EGFR, as well as inhibition of cellular proliferation of the human colon tumor cell line DiFi. Attachment of a 4-((3-hydroxy-4-methylphenyl)amino) substituent provided potent inhibitors of VEGFR-2 which also showed effects on the VEGF-dependent proliferation of human umbilical vein endothelial cells. Biol. activity was maintained with substitution at positions 5 or 6, but not 7, suggesting that the former positions are promising sites for introducing side chains which modulate physicochem. properties. Preliminary inhibition studies with varying ATP concentrations suggest that, like the quinazoline-based kinase inhibitors, the pyrrolotriazine-based inhibitors bind in the ATP pocket.

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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: 18362-64-6, is researched, SMILESS is CC(C)C(CC(C(C)C)=O)=O, Molecular C9H16O2Journal, Analytica Chimica Acta called Effect of substituents on the distribution coefficients of alkyl-substituted β-diketones and their copper and iron chelates, Author is Koshimura, Hideo; Okubo, Teiji, the main research direction is diketone chelate; copper diketone chelate; iron diketone chelate; chelate copper iron.COA of Formula: C9H16O2.

A series of alkyl-substituted β-diketones consisting of acetylacetone, dipropionylmethane, diisobutyrylmethane, dipivaloylmethane, dibutyrylmethane, divalerylmethane, dicaproylmethane and diisovalerylmethane was studied to establish the effect of substituents on the extraction constants and the acid dissociation constants The logarithm of the distribution coefficients of the β-diketones and of their Cu(II) and Fe(III) chelates was a linear function of the number of C atoms in the mol. The distribution coefficient increased by a factor of 4 for each addnl. C atom.

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