Tag: 200-300

《Efficient Thiolation of Alcohols Catalyzed by Long Chained Acid-Functionalized Ionic Liquids under Mild Conditions》 was published in European Journal of Organic Chemistry in 2019. These research results belong to Miao, Chengxia; Zhuang, Hongfeng; Wen, Yating; Han, Feng; Yang, Qing-Feng; Yang, Lei; Li, Zhen; Xia, Chungu. Recommanded Product: 63012-03-3 The article mentions the following:

Thioethers as important building blocks have been usually found in organic synthesis. Herein, a series of long chained acid-functionalized ionic liquids derived from pyrrolidine were applied for the thiolation of alcs. to synthesize different compounds containing thioether structures. This kind of ionic liquids exhibited higher efficiency than general ionic liquids based on imidazole, providing up to 99 % yield with [BsCtP][OTf] as the catalyst at room temperature for 0.25 h. The results indicated that the activities of the ionic liquids have relationship with the side chain length of ionic liquids based on pyrrolidine, anions and cations. The catalytic system had wide substrate scope and was applicable for the reaction of aromatic primary and secondary alcs. and thiols including aliphatic and aromatic thiols, benzothiazole-2-thiols and benzooxazole-2-thiols. Besides, there was no obvious change in activity of the catalyst after six runs. Thus, the catalytic system exhibited good recyclability. Addnl., carbocations should be the key intermediate and several functionalized groups of the ionic liquids have synergetic effect for the thiolation. In the experiment, the researchers used (3-Chlorophenyl)(phenyl)methanol(cas: 63012-03-3Recommanded Product: 63012-03-3)

(3-Chlorophenyl)(phenyl)methanol(cas: 63012-03-3) belongs to hydroxy-containing compounds. Hydroxy groups participate in the dehydration reactions that link simple biological molecules into long chains. The creation of a peptide bond to link two amino acids to make a protein removes the −OH from the carboxy group of one amino acid.Recommanded Product: 63012-03-3

Referemce:
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《Aliphatic α-Boryl-α-bromoketones: Synthesis and Reactivity》 was published in European Journal of Organic Chemistry in 2020. These research results belong to Ivon, Yevhen M.; Kuchkovska, Yuliya O.; Voitenko, Zoya V.; Grygorenko, Oleksandr O.. Name: Bis[(pinacolato)boryl]methane The article mentions the following:

A protocol for the preparation of α-boryl-α-bromoketones from alkenyl MIDA boronates was developed and applied to functionalized aliphatic derivatives The reaction sequence included regioselective hydroxybromination of olefin moiety, followed by oxidation of alc. group with Dess-Martin periodinane. The target trifunctional boronate-containing derivatives were obtained in up to 94% yield over two steps starting from alkenyl MIDA boronates. In some cases, functional groups present in the substrate participated in the bromohydroxylation step via intramol. nucleophilic attack at the bromonium cation leading to cyclic products. Addnl., the reactivity of aliphatic α-boryl-α-bromoketones was illustrated by nucleophilic substitution at the α-C atom and heterocyclization reactions. In the experiment, the researchers used many compounds, for example, Bis[(pinacolato)boryl]methane(cas: 78782-17-9Name: Bis[(pinacolato)boryl]methane)

Bis[(pinacolato)boryl]methane(cas: 78782-17-9) belongs to organoboron compounds.Name: Bis[(pinacolato)boryl]methane Organoboron compounds have been a cornerstone of synthetic transformations for decades. Areas such as boron-containing catalysts, metalate chemistry, photoredox methods, and boryl anions have brought significant new developments in understanding and provided new reactivity upon.

Referemce:
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The author of 《Fast Ion Transport Pathway Provided by Polyethylene Glycol Confined in Covalent Organic Frameworks》 were Guo, Zhenbin; Zhang, Yuanyuan; Dong, Yu; Li, Jie; Li, Siwu; Shao, Pengpeng; Feng, Xiao; Wang, Bo. And the article was published in Journal of the American Chemical Society in 2019. HPLC of Formula: 34374-88-4 The author mentioned the following in the article:

Covalent organic frameworks (COFs) with well-tailored channels are able to accommodate ions and offer their conduction pathway. However, due to strong Coulombic interaction and the lack of transport medium, directly including lithium salts into the channels of COFs results in limited ion transport capability. Herein, we propose a strategy of incorporating low-mol.-weight polyethylene glycol (PEG) into COFs with anionic, neutral, or cationic skeletons to accelerate Li+ conduction. The PEG confined in the well-aligned channels retains high flexibility and Li+ solvating ability. The ion conductivity of PEG included in a cationic COF can reach 1.78 × 10-3 S cm-1 at 120 °C. The simplicity of this strategy as well as the diversity of crystalline porous materials holds great promise to design high-performance all-solid-state ion conductors. The results came from multiple reactions, including the reaction of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4HPLC of Formula: 34374-88-4)

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives. Phloroglucinol derivatives are a major class of secondary metabolites. Phloroglucinol compounds can be classified into monomeric, dimeric, trimeric and higher phloroglucinols, and phlorotannins.HPLC of Formula: 34374-88-4

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The author of 《Hot π-Electron Tunneling of Metal-Insulator-COF Nanostructures for Efficient Hydrogen Production》 were Ming, Jintao; Liu, Ai; Zhao, Jiwu; Zhang, Pu; Huang, Haowei; Lin, Huan; Xu, Ziting; Zhang, Xuming; Wang, Xuxu; Hofkens, Johan; Roeffaers, Maarten B. J.; Long, Jinlin. And the article was published in Angewandte Chemie, International Edition in 2019. Formula: C9H6O6 The author mentioned the following in the article:

A metal-insulator-semiconductor (MIS) photosystem based on covalent organic framework (COF) semiconductors was designed for robust and efficient hydrogen evolution under visible-light irradiation A maximal H2 evolution rate of 8.42 mmol h-1 g-1 and a turnover frequency of 789.5 h-1 were achieved by using a MIS photosystem prepared by electrostatic self-assembly of polyvinylpyrrolidone (PVP) insulator-capped Pt nanoparticles (NPs) with the hydrophilic imine-linked TP-COFs having =C=O-H-N= hydrogen-bonding groups. The hot π-electrons in the photoexcited n-type TP-COF semiconductors can be efficiently extracted and tunneled to Pt NPs across an ultrathin PVP insulating layer to reduce protons to H2. Compared to the Schottky-type counterparts, the COF-based MIS photosystems give a 32-fold-enhanced carrier efficiency, attributed to the combined enhancement of photoexcitation rate, charge separation, and oxidation rate of holes accumulated in the valence band of the TP-COF semiconductor. The experimental part of the paper was very detailed, including the reaction process of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Formula: C9H6O6)

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives. Regarding monomeric phloroglucinols, this group encompasses acryl phloroglucinols, phloroglucinol-terpene adducts, phloroglucinol glycosides, halogenated phloroglucinols, prenylated phloroglucinols, and cyclicroup polyketides.Formula: C9H6O6

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

In 2019,Journal of the American Chemical Society included an article by Zhong, Wanfu; Sa, Rongjian; Li, Liuyi; He, Yajun; Li, Lingyun; Bi, Jinhong; Zhuang, Zanyong; Yu, Yan; Zou, Zhigang. Product Details of 34374-88-4. The article was titled 《A Covalent Organic Framework Bearing Single Ni Sites as a Synergistic Photocatalyst for Selective Photoreduction of CO2 to CO》. The information in the text is summarized as follows:

Photocatalytic reduction of CO2 into energy-rich carbon compounds has attracted increasing attention. However, it is still a challenge to selectively and effectively convert CO2 to a desirable reaction product. Herein, we report a design of a synergistic photocatalyst for selective reduction of CO2 to CO by using a covalent organic framework bearing single Ni sites (Ni-TpBpy), in which electrons transfer from photosensitizer to Ni sites for CO production by the activated CO2 reduction under visible-light irradiation Ni-TpBpy exhibits an excellent activity, giving a 4057μmol g-1 of CO in a 5 h reaction with a 96% selectivity over H2 evolution. More importantly, when the CO2 partial pressure was reduced to 0.1 atm, 76% selectivity for CO production is still obtained. Theor. calculations and exptl. results suggest that the promising catalytic activity and selectivity are ascribed to synergistic effects of single Ni catalytic sites and TpBpy, in which the TpBpy not only serves as a host for CO2 mols. and Ni catalytic sites but also facilitates the activation of CO2 and inhibits the competitive H2 evolution. The experimental part of the paper was very detailed, including the reaction process of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Product Details of 34374-88-4)

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives.Product Details of 34374-88-4For acyl phloroglucinols, it is considered the largest category of compounds among phloroglucinols of natural characteristics.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

In 2019,Journal of the American Chemical Society included an article by Jeong, Kihun; Park, Sodam; Jung, Gwan Yeong; Kim, Su Hwan; Lee, Yong-Hyeok; Kwak, Sang Kyu; Lee, Sang-Young. Category: alcohols-buliding-blocks. The article was titled 《Solvent-Free, Single Lithium-Ion Conducting Covalent Organic Frameworks》. The information in the text is summarized as follows:

Porous crystalline materials such as covalent organic frameworks and metal-organic frameworks have garnered considerable attention as promising ion conducting media. However, most of them addnl. incorporate lithium salts and/or solvents inside the pores of frameworks, thus failing to realize solid-state single lithium-ion conduction behavior. Herein, we demonstrate a lithium sulfonated covalent organic framework (denoted as TpPa-SO3Li) as a new class of solvent-free, single lithium-ion conductors. Benefiting from well-designed directional ion channels, a high number d. of lithium-ions, and covalently tethered anion groups, TpPa-SO3Li exhibits an ionic conductivity of 2.7 × 10-5 S cm-1 with a lithium-ion transference number of 0.9 at room temperature and an activation energy of 0.18 eV without addnl. incorporating lithium salts and organic solvents. Such unusual ion transport phenomena of TpPa-SO3Li allow reversible and stable lithium plating/stripping on lithium metal electrodes, demonstrating its potential use for lithium metal electrodes. The experimental part of the paper was very detailed, including the reaction process of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Category: alcohols-buliding-blocks)

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives.Category: alcohols-buliding-blocksFor acyl phloroglucinols, it is considered the largest category of compounds among phloroglucinols of natural characteristics.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

In 2017,Fei, Zhuping; Han, Yang; Gann, Eliot; Hodsden, Thomas; Chesman, Anthony S. R.; McNeill, Christopher R.; Anthopoulos, Thomas D.; Heeney, Martin published 《Alkylated Selenophene-Based Ladder-Type Monomers via a Facile Route for High-Performance Thin-Film Transistor Applications》.Journal of the American Chemical Society published the findings.Name: Bis[(pinacolato)boryl]methane The information in the text is summarized as follows:

We report the synthesis of two new selenophene-containing ladder-type monomers, cyclopentadiselenophene (CPDS) and indacenodiselenophene (IDSe), via a 2-fold and 4-fold Pd-catalyzed coupling with a 1,1-diborylmethane derivative Copolymers with benzothiadiazole were prepared in high yield by Suzuki polymerization to afford materials which exhibited excellent solubility in a range of nonchlorinated solvents. The CPDS copolymer exhibited a band gap of just 1.18 eV, which is among the lowest reported for donor-acceptor polymers. Thin-film transistors were fabricated using environmentally benign, nonchlorinated solvents, with the CPDS and IDSe copolymers exhibiting hole mobility up to 0.15 and 6.4 cm2 V-1 s-1, resp. This high performance was achieved without the undesirable peak in mobility often observed at low gate voltages due to parasitic contact resistance. The results came from multiple reactions, including the reaction of Bis[(pinacolato)boryl]methane(cas: 78782-17-9Name: Bis[(pinacolato)boryl]methane)

Bis[(pinacolato)boryl]methane(cas: 78782-17-9) belongs to organoboron compounds.Name: Bis[(pinacolato)boryl]methane Organoboron compounds are versatile intermediates and as such are some of the most important classes of reagents in modern organic chemistry. This stems from their ease of preparation combined with their ability to undergo a broad range of chemical transformations.

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Reference of Bis[(pinacolato)boryl]methaneIn 2017 ,《Development of neighboring electrophilic activation of active center in catalytic reactions via organometallic intermediates》 appeared in Bulletin of the Chemical Society of Japan. The author of the article were Endo, Kohei. The article conveys some information:

A review. Strategies for electrophilic activation by neighboring atoms should contribute to the development of novel catalytic performance in organic reactions. Neighboring electron-withdrawing Lewis acidic atoms can change the character of mol. catalysts, which might be more electrophilic toward inactive electron-rich mols. In this context, the development of carbene intermediates, diborylmethane derivatives, and multinuclear catalysts has realized efficient transformations. The use of cyclopropenes can generate electrophilic carbenoid intermediates in the presence of a Ag-catalyst, the reaction of which with an organozinc reagent gives allylzinc intermediates. The subsequent allylation reaction of other electrophiles takes place in situ as a 3-components coupling reaction. The novel reactivity of diborylmethane derivatives shows the generation of borate intermediates under ambient conditions, which can take part in the Suzuki Miyaura cross-coupling reaction. The mono-coupling reaction occurs exclusively without di-coupling reaction to give alkylboronates. The stereoselective synthesis of tetrasubstituted alkenylboronates was successful via the deprotonation of diborylalkanes, subsequent nucleophilic attack to ketones, and syn-elimination. The development of multinuclear catalysts using phosphorous ligands bearing protic moieties has realized efficient stereoselective 1,4-addition reaction of organozinc and organoaluminum reagents, where the creation of chiral quaternary stereogenic centers using acyclic enones is notable. After reading the article, we found that the author used Bis[(pinacolato)boryl]methane(cas: 78782-17-9Reference of Bis[(pinacolato)boryl]methane)

Bis[(pinacolato)boryl]methane(cas: 78782-17-9) belongs to organoboron compounds.Reference of Bis[(pinacolato)boryl]methane Organoboron compounds have been a cornerstone of synthetic transformations for decades. Areas such as boron-containing catalysts, metalate chemistry, photoredox methods, and boryl anions have brought significant new developments in understanding and provided new reactivity upon.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

In 2022,Guo, Ruoxuan; Liu, Yang; Huo, Yingzhong; Zhang, Anrui; Hong, Jiahui; Ai, Yuejie published an article in Journal of Colloid and Interface Science. The title of the article was 《Chelating effect between uranyl and pyridine N containing covalent organic frameworks: A combined experimental and DFT approach》.Product Details of 34374-88-4 The author mentioned the following in the article:

Covalent organic frameworks (COFs) are promising adsorbents for removing heavy metal ions, and have high crystallinity, a porous structure, and conjugated stability. N-containing functional groups are known to have great affinity for uranyl ions. In this work, to explore the peculiarity of the pyridine N structure as an efficient adsorbent, we chose 2,2′-dipyridine-5,5′-diamine (Bpy) and pyridine-2,5′-diamine (Py) as the core skeletons, and 1,3,5-triformylphloroglucinol (Tp) as the linker to synthesize two crystalline and stable N-containing COFs named TpBpy and TpPy, resp., through a facile solvothermal method. Characterization results demonstrated that TpBpy and TpPy possessed regularly growing pore sizes, large sp. surface areas and relatively strong thermal resistances. The results of batch experiments showed that both COF materials were capable of the effective removal of uranyl with uptake capacities of 115.45 mg g-1 and 291.79 mg g-1, resp. In addition, d. functional theory (DFT) simulations highlighted the beneficial chelation effect of the double N structure in pyridine monomers for removing uranyl ions. Combining systematic exptl. and theor. analyses, the adsorption process and interaction mode of porous COFs and UO2+2 were revealed, to provide predictable support for the application of pyridine N-containing COFs in the field of environmental remediation.2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Product Details of 34374-88-4) was used in this study.

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives. Regarding monomeric phloroglucinols, this group encompasses acryl phloroglucinols, phloroglucinol-terpene adducts, phloroglucinol glycosides, halogenated phloroglucinols, prenylated phloroglucinols, and cyclicroup polyketides.Product Details of 34374-88-4

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Papa Spadafora, Bruna; Moreira Ribeiro, Francisco Wanderson; Matsushima, Jullyane Emi; Ariga, Elaine Miho; Omari, Isaac; Soares, Priscila Machado Arruda; de Oliveira-Silva, Diogo; Vinhato, Elisangela; McIndoe, J. Scott; Carita Correra, Thiago; Rodrigues, Alessandro published an article in 2021. The article was titled 《Regio- and diastereoselective Pd-catalyzed aminochlorocyclization of allylic carbamates: scope, derivatization, and mechanism》, and you may find the article in Organic & Biomolecular Chemistry.Safety of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate The information in the text is summarized as follows:

The regio- and diastereoselective synthesis of oxazolidinones I [R1 = Et, Ph, 2-naphthyl, etc.; R2 = P(O)(OEt)2, Ph, Ts, etc.] via a Pd-catalyzed vicinal C-N/C-Cl bond-forming reaction from internal alkenes of allylic carbamates was reported. The oxazolidinones were obtained in yields of 44 to 95% with high to excellent diastereoselectivities (from 6 : 1 to >20 : 1 dr) from readily available precursors. This process was scalable and the products were suitable for the synthesis of useful amino alcs. A detailed theor. and exptl. mechanistic study was carried out to describe that the reaction proceeds through an anti-aminopalladation of the alkene followed by an oxidative C-Pd(II) cleavage with retention of the carbon stereochem. to yield the major diastereomer. The role of Cu(II) in a C-Cl bond-forming mechanism step had also been proposed. The results came from multiple reactions, including the reaction of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Safety of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate)

Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5) is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. Safety of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate It may be used as a constituent to prepare DNS (3,5- dinitrosalicylic acid) reagent and Fehling′s solution B, which are used in the determination of reducing sugar.

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