Tag: M.W:200-300

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: 814-94-8, is researched, SMILESS is O=C([O-])C([O-])=O.[Sn+2], Molecular C2O4SnJournal, Inorganic Chemistry Communications called Hetero-mixed TiO2-SnO2 interfaced nano-oxide catalyst with enhanced activity for selective oxidation of furfural to maleic acid, Author is Malibo, Petrus M.; Makgwane, Peter R.; Baker, Priscilla G. L., the main research direction is titanium tin nano oxide catalyst preparation oxidation furfural; maleic acid preparation.SDS of cas: 814-94-8.

Herein authors report on the catalytic activity of hetero-mixed TiO2-SnO2 nano-oxide catalyst for the selective liquid-phase oxidation of furfural to maleic acid using H2O2 oxidant. The high surface area and strong interaction of the two oxides with modified electronic structure manifested enhanced effective oxygen vacancies, and redox activity performance of the TiO2-SnO2 catalyst for furfural oxidation reaction. The structure of the catalyst was investigated by the powder x-ray diffraction (XRD), XPS, high-resolution transition electron microscopy (HRTEM), ESR (EPR) and Brunauer-Emmett-Teller (BET) surface area analyzer techniques. The interfaced TiO2-SnO2 oxide catalyst was more catalytically active than its single counterpart SnO2 and TiO2 oxides to give a furfural conversion of 96.2% at up to 63.8% yield of maleic acid. The catalytic performance shown by TiO2-SnO2 present encouraging prospects for an economical solid metal oxide catalyst to access biobased maleic acid from renewable biomass-derived furfural.

Although many compounds look similar to this compound(814-94-8)SDS of cas: 814-94-8, numerous studies have shown that this compound(SMILES:O=C([O-])C([O-])=O.[Sn+2]), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

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 Electron Donor-Acceptor Complex-Initiated Photochemical Cyanation for the Preparation of α-Amino Nitriles, published in 2020-12-18, which mentions a compound: 52287-51-1, Name is 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, Molecular C8H7BrO2, Product Details of 52287-51-1.

An electron donor-acceptor complex-initiated α-cyanation of tertiary amines has been described. The reaction protocol provides a novel method to synthesize various α-amino nitriles under mild conditions. The reaction can proceed smoothly without the presence of photocatalysts and transition metal catalysts, and either oxidants are unnecessary or O2 is the only oxidant. The practicality of this method is showcased not only by the late-stage functionalization of natural alkaloid derivatives and pharmaceutical intermediate, but also by the applicability of a stop-flow microtubing reactor.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

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 Novel synthesis of p-benzoquinone ethylene acetal, published in 1975, which mentions a compound: 52287-51-1, Name is 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, Molecular C8H7BrO2, Quality Control of 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine.

PhO(CH2)2OH (I) reacted with HgO-iodine reagent (II) in the dark to give 4-RC6H4O(CH2)2OH (III; R = I). Irradiation of III (R = I) in the presence of II gave 84% title compound (IV). In contrast, irradiation of I directly, in the presence of II, gave in addition to 34% IV, 31% III (R = I), 9-14% benzodioxins V (R = H, I), and 6% p-benzoquinone. NMR studies showed that III (R = Br, Cl) were stable to II in the dark but on irradiation gave 16% IV and 30-5% V (R = Br, Cl, resp.). The mechanism for the formation of IV involved formation of an alkoxyl radical followed by cyclization and halo-elimination.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

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: 52287-51-1, is researched, Molecular C8H7BrO2, about Synthesis of tailor-made copolymers containing 1,4-benzodioxane systems for pH controlled selective flocculation of mineral dispersions, the main research direction is ethylenedioxyphenyl propenone polymer; ethylenedioxybenzyl acrylate polymer; flocculating agent polymer titanium ore.Application In Synthesis of 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine.

1-(3,4-Ethylenedioxyphenyl)-2-propen-1-one, 3,4-ethylenedioxybenzyl acrylate, and 1,2-ethylene glycol-1-methacrylate-2-[1-(3,4-ethylenedioxy)]benzoate were prepared, homopolymerized, and copolymerized with acrylic acid or methacrylic acid. The polymers had potential use as flocculating agents for Ti ores.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Related Products of 52287-51-1. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, is researched, Molecular C8H7BrO2, CAS is 52287-51-1, about Organozinc pivalates for cobalt-catalyzed difluoroalkylarylation of alkenes. Author is Cheng, Xinyi; Liu, Xingchen; Wang, Shengchun; Hu, Ying; Hu, Binjing; Lei, Aiwen; Li, Jie.

A cobalt-catalyzed regioselective difluoroalkylarylation of both activated and unactivated alkenes with solid arylzinc pivalates and difluoroalkyl bromides through a cascade Csp3-Csp3/Csp3-Csp2 bond formation under mild reaction conditions. Indeed, a wide range of functional groups on difluoroalkyl bromides, olefins, 1,3-dienes as well as (hetero)arylzinc pivalates are well tolerated by the cobalt-catalyst, thus furnished three-component coupling products in good yields and with high regio- and diastereoselectivity. Kinetic experiments compared arylzinc pivalates and conventional arylzinc halides highlighted the unique reactivity of these organozinc pivalates. Mechanistic studies strongly supported that the reaction involved direct halogen atom abstraction via single electron transfer to difluoroalkyl bromides from the in-situ formed cobalt(I) species, thus realized a Co(I)/Co(II)/Co(III) catalytic cycle.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Tin(II) oxalate( cas:814-94-8 ) is researched.Application In Synthesis of Tin(II) oxalate.Malibo, Petrus M.; Makgwane, Peter R.; Baker, Priscilla G. published the article 《Heterostructured Redox-Active V2O5/SnO2 Oxide Nanocatalyst for Aqueous-Phase Oxidation of Furfural to Renewable Maleic Acid》 about this compound( cas:814-94-8 ) in ChemistrySelect. Keywords: maleic acid furfural oxidation vanadium pentoxide tin oxide nanocatalyst. Let’s learn more about this compound (cas:814-94-8).

In this paper, we report on the synthesis of heterostructured V2O5/SnO2 nanocatalysts with varying vanadium metal loadings of 5-30 wt %. The catalytic performance of the designed catalysts was evaluated in the oxidation reaction of furfural to maleic acid using hydrogen peroxide. The synthesis method afforded highly dispersed nanosized VOx species with predominant exposed V5+ and V4+ on SnO2 oxide. Such structural interface developments of the heterostructured V2O5/SnO2 catalyst resulted into modified electronic structure; phase compositions and textural properties of the individual V and Sn metal oxides with respect to varying V-metal loadings, which lead to improved catalytic performances. Under optimized reaction conditions, a 60% yield of maleic acid was achieved in furfural oxidation reaction. Based on characterization results, the high surface area and low V-metal loading (∼9.3 wt % vanadium) presented the most redox active V2O5/SnO2 catalyst. At low V-metal loadings the catalyst is populated with the presence of VOx monomeric and polymeric species which are proposed to induce the highly active vanadium sites. This was confirmed for the most active catalyst to possess vanadium with the predominant V4+ state and superoxide oxygen. The catalytic performance showed by V2O5/SnO2 present a solid catalyst derived from earth-abundant and cheap metals for the catalytic oxidation upgrade of biomass typical furfural to important value-added maleic acid intermediate chem.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Safety of Tin(II) oxalate. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Tin(II) oxalate, is researched, Molecular C2O4Sn, CAS is 814-94-8, about Spray-combustion synthesis of indium tin oxide nanopowder. Author is Chen, Zhiyang; Zhu, Yuan; Duan, Qiyao; Chen, Anqi; Tang, Zikang.

Nanocrystalline indium tin oxide (ITO) powders were prepared by a novel spray combustion method. Using single-drop study equipment, we studied the thermodn. of the combustion reaction. The reaction can be ignited at air temperature as lower as 171.3° when using urea and glucose as composite fuel. Once the reaction is ignited, the combustion temperature can surge to >500°, generating nanocrystalline ITO powders with grain size ∼40 nm. Footages from high-speed camera demonstrated that the reaction is in 3 steps: moderate beginning, violent middle, and decaying end. The ignition is very sensitive to the air temperature, even 0.2° minus deviation may fail the combustion. The combustion reaction is self-sustainable, which saves the energy supply. The low ignition temperature means the combustion reaction can be carried out in a conventional spray dryer. Our results provide a feasible way to mass produce nanocrystalline ITO powders, which as a methodol., may be extended to the production of other oxide nanopowders.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

HPLC of Formula: 52287-51-1. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, is researched, Molecular C8H7BrO2, CAS is 52287-51-1, about Synthesis and antiinflammatory activity of some new derivatives of 6-benzoyl-1,4-benzodioxan. Author is Labanauskas, L. K.; Brukshtus, A. B.; Gaidelis, P. G.; Udrenaite, E. B.; Daukshas, V. K..

Friedel-Crafts acylation of 6-bromo-, 6-chloro- or 6-ethylbenzodioxan with substituted benzoic acid chloranhydrides in the presence of AlCl3 gave 48-93% 15 title compounds All the title compounds exhibited antiinflammatory activity. The most active compounds exceeded acetylsalicylic acid in activity and approached ibuprofen, while being markedly less toxic than the latter reference drug.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Recommanded Product: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 6-Bromo-2,3-dihydrobenzo[b][1,4]dioxine, is researched, Molecular C8H7BrO2, CAS is 52287-51-1, about Ceramic boron carbonitrides for unlocking organic halides with visible light. Author is Yuan, Tao; Zheng, Meifang; Antonietti, Markus; Wang, Xinchen.

Here, boron carbonitride (BCN) ceramics were such a system and can reduce organic halides, including (het)aryl and alkyl halides, with visible light irradn was reported. Cross-coupling of halides to afford new C-H, C-C, and C-S bonds was proceeded at ambient reaction conditions. Hydrogen, (het)aryl, and sulfonyl groups were introduced into the arenes and heteroarenes at the designed positions by means of mesolytic C-X (carbon-halogen) bond cleavage in the absence of any metal-based catalysts or ligands. BCN was used not only for half reactions, like reduction reactions with a sacrificial agent, but also redox reactions through oxidative and reductive interfacial electron transfer. The BCN photocatalyst showed tolerance to different substituents and conserved activity after five recycles. The apparent metal-free system opened new opportunities for a wide range of organic catalysts using light energy and sustainable materials, which were metal-free, inexpensive and stable.

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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

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 Enhancing Reaction Kinetics of Sulfur-Containing Species in Li-S Batteries by Quantum Dot-Level Tin Oxide Hydroxide Catalysts, published in 2021-05-24, which mentions a compound: 814-94-8, mainly applied to reaction kinetic sulfur lithium battery quantum dot catalyst, COA of Formula: C2O4Sn.

The application of Li-S batteries is hampered by some unresolved issues, including the severe polysulfides shuttle effects and sluggish reaction kinetics. Hence, we designed and prepared tin oxide hydroxide quantum dots (TOH) anchored on a honeycomb porous carbon (HPC) matrix as multifunctional sulfur hosts, and deeply studied the enhancement of TOH on the reaction kinetics of Li-S battery referred to as the apparent activation energy, Li+ ion diffusion coefficient, and reaction barrier. It is proved by d. functional theory that the HPC@TOH hosts have a higher binding energy to polysulfides than the simplex carbon matrix. Meanwhile, the catalytic TOH can decrease the surface active energy of the redox reaction and accelerate the conversion of sulfur-containing species. Consequently, by means of the synergistic effects of phys. capture and chem. adsorption together with catalytic conversion, the comprehensive performances of Li-S batteries are distinctly promoted. In particular, a Li-S battery using HPC@TOH as a host delivers a good reversible specific capacity of 1342.95 mAh g-1 at 0.1 C. Moreover, with the current increased to 1 C, it shows a relatively satisfactory specific capacity of 918.05 mAh g-1. After 400 cycles, a competitive specific capacity of 688.54 mAh g-1 can still be maintained with a very low fading rate of 0.06% per cycle. Most importantly, when the sulfur area loading reaches as high as 4.25 mg cm-2 and electrolyte/sulfur ratio is controlled to be as low as 7μL mg-1, and the Li-S battery using HPC @TOH as a host can still cycle steadily more than 50 cycles at 0.2 C. Therefore, this work provides an effective manner to boost the comprehensive performance of Li-S batteries by virtue of optimizing and designing the host material with synergistic effects of phys. capture, chem. adsorption, and catalytic conversion.

There are many compounds similar to this compound(814-94-8)COA of Formula: C2O4Sn. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics