Tag: M.W:100-200

Application In Synthesis of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, is researched, Molecular C10H24N2, CAS is 111-18-2, about Removal of Metal Ions in Phosphoric Acid by Electro-Electrodialysis with Cross-Linked Anion-Exchange Membranes. Author is Duan, Xiaoling; Wang, Cun-Wen; Wang, Tielin; Xie, Xiaolin; Zhou, Xingping; Ye, Yunsheng.

There are numerous metallic impurities in wet H3PO4, which causes striking neg. effects on industrial H3PO4 production The purification behavior of metallic impurities (Fe, Mg, Ca) from a wet H3PO4 solution employing the electroelectrodialysis (EED) technol. was studied. The cross-linked polysulfone anion-exchange membranes (AEMs) for EED were prepared using N,N,N’,N’-tetramethyl-1,6-hexanediamine (TMHDA) to achieve simultaneous crosslinking and quaternization without any cross-linkers or catalysts. The performance of the resulting membranes can be determined using quaternization reagents. When the molar ratio of trimethylamine/TMHDA/chloromethylated polysulfone is 3:1:1, the cross-linked membrane CQAPSU-3-1 exhibits lower H2O swelling and membrane area resistance than the noncross-linked membrane. The low membrane area resistance of CQAPSU-3-1 with long alkyl chains was obtained due to the hydrophilic-hydrophobic microphase separation structure formed by TMHDA. EED experiments with different initial H3PO4 concentrations of 0.52 and 1.07M were conducted to evaluate the H3PO4 purification of different AEMs. The EED experiments were more suitable for the purification of wet H3PO4 solution at low concentrations The H3PO4 concentration in the anode compartment could be increased from 0.52 to 1.04M. Through optimization, with an initial acid concentration of 0.52M, CQAPSU-3-1 exhibits an enhanced metallic impurity removal ratio of >72.0%, the current efficiency of >90%, and energy consumption of 0.48 kWh/kg. Therefore, CQAPSU-3-1 exhibits much higher purification efficiency than other membranes at a low initial H3PO4 concentration, suggesting its potential in H3PO4 purification application.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

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, Angewandte Chemie, International Edition called A Cationic Oligomer as an Organic Template for Direct Synthesis of Aluminosilicate ITH Zeolite, Author is Lei, Chi; Dong, Zhuoya; Martinez, Cristina; Martinez-Triguero, Joaquin; Chen, Wei; Wu, Qinming; Meng, Xiangju; Parvulescu, Andrei-Nicolae; De Baerdemaeker, Trees; Mueller, Ulrich; Zheng, Anmin; Ma, Yanhang; Zhang, Weiping; Yokoi, Toshiyuki; Marler, Bernd; De Vos, Dirk E.; Kolb, Ute; Corma, Avelino; Xiao, Feng-Shou, the main research direction is cationic oligomer organic template aluminosilicate ITH zeolite; MTP reaction; aluminosilicate ITH; cationic oligomers; direct synthesis; zeolites.Reference of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine.

There are a large number of zeolites, such as ITH, that cannot be prepared in the aluminosilicate form. Now, the successful synthesis of aluminosilicate ITH zeolite using a simple cationic oligomer as an organic template is presented. Key to the success is that the cationic oligomer has a strong complexation ability with aluminum species combined with a structural directing ability for the ITH structure similar to that of the conventional organic template. The aluminosilicate ITH zeolite has high crystallinity, nanosheet-like crystal morphol., large surface area, fully four-coordinated Al species, and abundant acidic sites. Methanol-to-propylene (MTP) tests reveal that the Al-ITH zeolite shows much higher selectivity for propylene and longer lifetime than com. ZSM-5. FCC tests show that Al-ITH zeolite is a good candidate as a shape-selective FCC additive for enhancing propylene and butylene selectivity.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Regio- and enantioselective rhodium-catalyzed addition of 1,3-diketones to allenes: Construction of asymmetric tertiary and quaternary all carbon centers》. Authors are Beck, Thorsten M.; Breit, Bernhard.The article about the compound:2,6-Dimethyl-3,5-heptanedionecas:18362-64-6,SMILESS:CC(C)C(CC(C(C)C)=O)=O).Electric Literature of C9H16O2. Through the article, more information about this compound (cas:18362-64-6) is conveyed.

An unprecedented highly regio- and enantioselective rhodium-catalyzed addition of 1,3-diketones to terminal and 1,1-disubstituted allenes furnishing asym. tertiary and quaternary all-carbon centers is reported. By applying a RhI/phosphoramidite/TFA catalytic system under mild conditions, the desired chiral branched α-allylated 1,3-diketones could be obtained in good to excellent yields, with perfect regioselectivity and in high enantioselectivity. The reaction shows a broad functional-group tolerance on both reaction partners highlighting its synthetic potential.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, is researched, Molecular C10H24N2, CAS is 111-18-2, about Synthesis of SAPO-56 molecular sieve and its catalytic performance in methanol-to-olefins reaction, the main research direction is SAPO 56 zeolite catalytic methanol olefin.Application In Synthesis of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine.

The synthesis of SAPO-56 mol. sieves with different Si contents was carried out by the method of low-high temperature multistep crystallization using N, N, N′, N′-tetramethyl-1, 6-hexanediamine (TMHD) as template. The samples were characterized by X-ray diffraction (XRD), SEM (SEM), N2 adsorption-desorption, NH3 temperature programmed desorption (NH3-TPD) and evaluated their catalytic performances in the conversion of methanol-to-olefins reaction (MTO). The results indicated that the morphol. of the samples changed greatly, especially the sample with the ratio of SiO2/Al2O3 0.4 appeared new sandwich layered structure. And the surface acidity increased with the increase of the ratio of SiO2/Al2O3. Moreover, the selectivity of olefins increased primarily and then decreased. The highest olefins selectivity was appeared when the ratio of SiO2 to Al2O3 was 0.4.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Alkaline enrichment via electrodialysis with alkaline stable side-chain-type polysulfone-based anion exchange membranes, published in 2021-11-15, which mentions a compound: 111-18-2, mainly applied to quaternized chloromethylated polysulfone electrodialysis anion exchange membrane alk enrichment, Safety of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine.

To meet the need of efficient resource utilization, developing stable and efficient anion exchange membranes (AEMs) for alk. enrichment application is of significance. In this work, we designed four polysulfone-based side-chain-type AEMs with several cations and different length of spacers per chain, to explore the structure-property relationship and obtained AEMs with high performance for alk. enrichment via electrodialysis (ED). Our investigation demonstrates that, the optimized AEM (CM-TQ6Q6Q-1, 1.38 mmol·g-1) exhibits low swelling ratio of 8.9%, low area resistance of 2.48 Ω·cm2, acceptable OH- conductivity of 13.7 mS·cm-1. In addition, this AEM also shows relatively good alk. stability with the IEC retention of 96.7% relative to the original IEC, suggesting the potential application of alk. enrichment via electrodialysis (ED). After 5-times NaOH enrichment tests in ED, CM-TQ6Q6Q-1 AEM shows an efficient ED performance with alk. concentration times of ∼1.8 (current efficiency: ∼90.0%; energy consumption: 8.47 kWh·kg-1), and maintains 96.4% of its original IEC, which are even comparable to those from com. AEM (Neosepta AHA). The results demonstrate that the as-prepared AEM shows the promising potential ED application for alkali enrichment from the alk. waste water.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

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, International Journal of Hydrogen Energy called Novel multi-channel anion exchange membrane based on poly ionic liquid-impregnated cationic metal-organic frameworks, Author is Li, Kai; Chen, Jia; Guan, Mingming; Tang, Shaokun, the main research direction is anion exchange membrane ionic liquid impregnated metal organic framework.Quality Control of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine.

The “”trade-off”” effect between hydroxide conductivity and dimensional stability is challenging issue for anion exchange membrane fuel cells (AEMFCs). In this study, the framework of UiO-66-NH2 is for the first time applied to anion exchange membranes (AEMs). The robust pore walls of UiO-66-NH2 with mech. and structural durabilities protect the membrane from the excessive swelling effects (a swelling ratio of 7%). In addition, the framework of UiO-66-NH2 is directly modified into (UiO-66-NH2)+Cl- as hydroxide conduction channels by anion stripping for the first time. A well-organized ion nanochannels is constructed by the in-situ self-assembly of N,N,N’,N’-tetramethyl-1,6-hexanediamine (TMHDA) and allyl bromide within the highly ordered pores of (UiO-66-NH2)+Cl-. The obtained QA@(UiO-66-NH2)+Cl- then incorporated into pristine membrane (QAPPO) to fabricate the novel multi-channel AEMs. The hydroxide conductivity of QA@(UiO-66-NH2)+Cl-/PPO is up to 123 mS·cm-1 at 80°, which is greatly improved compared to QAPPO pristine membrane.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1-Aminopyrrole-2-carboxamide, is researched, Molecular C5H7N3O, CAS is 159326-69-9, about Design, synthesis, and evaluation of pyrrolo[2,1-f][1,2,4]triazine derivatives as novel hedgehog signaling pathway inhibitors, the main research direction is pyrrolotriazine derivative preparation SAR hedgehog signaling inhibitor cancer; Hedgehog signaling pathway; Inhibitors; Novel; Pyrrolo[2,1-f][1,2,4]triazine.Recommanded Product: 159326-69-9.

A novel series of Hh signaling pathway inhibitors were designed by replacing the pyrimidine skeleton of our earlier reported lead compound with pyrrolo[2,1-f][1,2,4]triazine scaffold. Starting from this new scaffold, SAR exploration was investigated based on structural modification on A-ring, C-ring and D-ring. And several much potent compounds were studies in vivo to profile their pharmacokinetic properties. Finally, optimization leads to the identification of compound (I), a potent Hh signaling pathway inhibitor with superior potency in vitro and satisfactory pharmacokinetic properties in vivo.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine(SMILESS: CN(C)CCCCCCN(C)C,cas:111-18-2) is researched.Synthetic Route of C15H11NO. The article 《Preparation of Silicalite-1 Nanosheets and its Application in Vapor-Phase Beckmann Rearrangement of Cyclohexanone Oxime》 in relation to this compound, is published in Integrated Ferroelectrics. Let’s take a look at the latest research on this compound (cas:111-18-2).

Silicalite-1 nanosheets catalyst with a hierarchical architecture was hydrothermally synthesized using [C18H37-N+(CH3)2-C6H12-N+(CH3)2-C6H13](Br)-2 as template. It has been studied systematically by investigating the influence of different synthesis parameters and crystallization kinetics under tumbling conditions. Highly crystalline silicalite-1 nanosheets with large external surface was obtained by regulating the crystallization time and the amount of water, template and the alkalinity It was examined as catalyst for vapor-phase Beckmann rearrangement of cyclohexanone oxime to caprolactam and exhibited an excellent catalytic performance and long catalytic lifetime. This can be attributed to nest silanol groups located on the large external surface of the nanosheets. Furthermore, the high mesoporosity of nanosheets shorten the diffusion path length and reduce coking deposition, which remarkably improve catalyst stability.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Ignatchenko, Alexey V.; DiProspero, Thomas J.; Patel, Heni; LaPenna, Joseph R. published the article 《Equilibrium in the Catalytic Condensation of Carboxylic Acids with Methyl Ketones to 1,3-Diketones and the Origin of the Reketonization Effect》. Keywords: carboxylic acid methyl ketone catalytic condensation reketonization.They researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Related Products of 18362-64-6. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:18362-64-6) here.

Acetone is the expected ketone product of acetic acid decarboxylative ketonization reaction with metal oxide catalysts used in the industrial production of ketones and for biofuels upgrade. Decarboxylative cross-ketonization of a mixture of acetic and isobutyric acids yields highly valued unsym. Me iso-Pr ketone (MIPK) along with two less valuable sym. ketones, acetone and diisopropyl ketone (DIPK). We describe a side reaction of isobutyric acid with acetone yielding the cross-ketone MIPK with monoclinic zirconia and anatase titania catalysts in the absence of acetic acid. We call it re-ketonization reaction because acetone is deconstructed and used for the construction of MIPK. Isotopic labeling of the isobutyric acid’s carboxyl group shows that it is the exclusive supplier of the carbonyl group of MIPK, while acetone provides only Me group for MIPK construction. More branched ketones, MIPK or DIPK, are less reactive in their re-ketonization with carboxylic acids. The proposed mechanism of re-ketonization supported by DFT computations starts with acetone enolization and proceeds via its condensation with surface isobutyrate to a beta-diketone similar to beta-keto acids formation in the decarboxylative ketonization of acids. Decomposition of unsym. beta-diketones with water (or methanol) by the retro-condensation reaction under the same conditions over metal oxides yields two pairs of ketones and acids (or esters in case of methanol) and proceeds much faster compared to their formation. The major direction yields thermodynamically more stable products – more substituted ketones. DFT calculations predict even a larger fraction of the thermodynamically preferred pair of products. The difference is explained by some degree of a kinetic control in the opposite direction. Re-ketonization has lower reaction rates compared to regular ketonization. Still, a high extent of re-ketonization occurs unnoticeably during the decarboxylative ketonization of acetic acid as the result of acetone reaction with acetic acid. This degenerate reaction is the major cause of the inhibition by acetone of its own rate of formation from acetic acid at high conversions.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Direct Synthesis of Nanosheet-Stacked Hierarchical “”Honey Stick-like”” MFI Zeolites by an Aromatic Heterocyclic Dual-Functional Organic Structure-Directing Agent, published in 2021-06-16, which mentions a compound: 111-18-2, Name is N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, Molecular C10H24N2, Formula: C10H24N2.

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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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica