Month: November 2022

Borrel, Julien; Pisella, Guillaume; Waser, Jerome published an article on January 17 ,2020. The article was titled 《Copper-Catalyzed Oxyalkynylation of C-S Bonds in Thiiranes and Thietanes with Hypervalent Iodine Reagents》, and you may find the article in Organic Letters.Formula: C3H6O2 The information in the text is summarized as follows:

We report the oxyalkynylation of thiiranes and thietanes using ethynylbenziodoxolone reagents (EBXs) to readily access functionalized building blocks bearing an alkynyl, a benzoate, and an iodide group. The reaction proceeds with high atom efficiency most likely through an alkynyl-episulfonium intermediate. The transformation is copper-catalyzed and compatible with a large array of thiiranes and thietanes. In the experimental materials used by the author, we found (R)-Oxiran-2-ylmethanol(cas: 57044-25-4Formula: C3H6O2)

(R)-Oxiran-2-ylmethanol(cas: 57044-25-4) is a chiral building block used to construct an epoxyvinyl iodide intermediate in a synthesis of a furanocembrane, a marine natural product.Formula: C3H6O2

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In 2013,Wang, Zong-xiong; Bao, Cheng-ping; Chen, Zhuo published 《Formulation of aluminum powder-type purifier for alkaline zinc plating bath》.Diandu Yu Tushi published the findings.Quality Control of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate The information in the text is summarized as follows:

Three formulations of aluminum powder-type purifier for alk. zinc plating bath were presented. The 1 kg of product contains: (1) industrial Al powder (200-300 mesh) 100%; (2) Al powder 600 g, Zn powder 300 g, and EDTA-2Na 100 g; or (3) Al powder 770 g, Zn powder 150 g, Na2S2O4 20 g, potassium sodium tartrate 50 g, and sodium alginate 10 g. The dosage is 1.0-2.0 g/L for deep treatment and 0.5-1.0 g/L for routine maintenance. The purification procedure and some points for attention are described.Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Quality Control of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate) was used in this study.

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. Quality Control of Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate It is utilized to break up emulsion in organic synthesis as well as a common precipitant in protein crystallography.

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In 2016,Muench, Falk; Felix, Eva-Maria; Rauber, Markus; Schaefer, Sandra; Antoni, Markus; Kunz, Ulrike; Kleebe, Hans-Joachim; Trautmann, Christina; Ensinger, Wolfgang published 《Electrodeposition and electroless plating of hierarchical metal superstructures composed of 1D nano- and microscale building blocks》.Electrochimica Acta published the findings.Computed Properties of C4H12KNaO10 The information in the text is summarized as follows:

The fabrication of ordered superstructures composed of nano- and microscale building blocks is of tremendous interest. The authors present a versatile approach for the synthesis of hierarchical and free-standing metal architectures of high structural complexity. Using the ion-track etching technique, hierarchically porous polycarbonate membranes were obtained, which are employed as nanocasting templates. Pore filling is accomplished by the two complementary wet-chem. techniques electrodeposition and electroless plating. Depending on the pore filling mechanism and the template structure, a wide range of novel metal nano-/micro-architectures can be realized. The products can be characterized as hierarchical assemblies of 1-dimensional structures (nanotubes, nanowires, microwires, nanorods). With electrodeposition, complete pore filling is achieved, which gave wire-based morphologies. Special attention is dedicated to the controlled partial filling of the pores with electroless plating, which allows the simultaneous deposition of tubes and – depending on the conformity of the plating reaction and the deposition time – narrower arrays of tubes, wires or rods. To demonstrate the favorable functional properties of the obtainable products, a Ag-based wire-tube assembly is employed in the enzyme-free and selective electrochem. detection of H2O2. An excellent sensitivity of 1340 μA mM-1 cm-2 and a fast response time of <2 s is achieved, which is explained by the absence of binders, the well-accessible, open-pored structure, the presence of continuous conduction pathways and the high surface area of the material. In the experimental materials used by the author, we found Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Computed Properties of C4H12KNaO10)

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. Computed Properties of C4H12KNaO10 Potassium sodium tartrate tetrahydrate has been used in the preparation of Lowry reagent for the determination of microsomal protein concentration in rat hepatic microsomes by Lowry method.

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In 2017,Miralles, Nuria; Gomez, Jose Enrique; Kleij, Arjan W.; Fernandez, Elena published 《Copper-Mediated SN2′ Allyl-Alkyl and Allyl-Boryl Couplings of Vinyl Cyclic Carbonates》.Organic Letters published the findings.Product Details of 78782-17-9 The information in the text is summarized as follows:

A method for the Cu-catalyzed borylmethylation and borylation of vinyl cyclic carbonates through an SN2′ mechanism is reported. These singular reactions involve selective SN2′ allylic substitutions with concomitant ring opening of the cyclic carbonate and with extrusion of CO2 and formation of a useful hydroxyl functionality in a single step. The stereoselectivity of the homoallylic borylation and allylic borylation processes can be controlled, and synthetically useful unsaturated (E)-pent-2-ene-1,5-diols and (E)-but-2-ene-1,4-diols are accessed. The experimental part of the paper was very detailed, including the reaction process of Bis[(pinacolato)boryl]methane(cas: 78782-17-9Product Details of 78782-17-9)

Bis[(pinacolato)boryl]methane(cas: 78782-17-9) belongs to organoboron compounds.Product Details of 78782-17-9 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.

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In 2018,Soheili, Majid; Mohamadnia, Zahra; Karimi, Babak published 《Switching from Ethylene Trimerization to Ethylene Polymerization by Chromium Catalysts Bearing SNS Tridentate Ligands: Process Optimization Using Response Surface Methodology》.Catalysis Letters published the findings.HPLC of Formula: 1195-59-1 The information in the text is summarized as follows:

Two types of chromium catalysts bearing pyridine and amine based SNS ligands under the title of (pyridine-SNS-alkyl/CrCl3) and (amine-SNS-alkyl/CrCl3) were synthesized. Different thiolates such as octyl, pentyl, Bu, cyclohexyl and cyclopentyl thiolates were reacted with 2,6-pyridine-dimethylene-ditosylate (PMT)/THF solution at room temperature Then, the purified pyridine-based SNS ligands (1-5) were reacted with CrCl3 (THF)3 to obtain the pyridine-SNS-alkyl/CrCl3 catalysts (6-10) in 50-70% yields. MMAO-activated pyridine-SNS-alkyl/CrCl3 catalysts were capable of oligomerizing ethylene. Statistical exptl. design was conducted using the central composite design method and surface methodol. to study of the effect of important parameters such as ethylene pressure, Al/Cr ratio, catalyst concentration and the reaction temperature on 1-C6 productivity of catalyst (7). A quadratic polynomial equation was developed to predict the 1-C6 productivity. Ethylene oligomerization using the catalyst (7) was lead to a optimized reaction conditions, including the ethylene pressure of 19.5 bar, the temperature of 58.2 °C, the MMAO co-catalyst, Al/Cr = 841 and the catalyst concentration of 8.7 μmol. The catalytic properties for ethylene oligomerization are strongly affected by reaction temperature The exptl. results indicated the reasonable agreement with the predicted values. The transformation from ethylene trimerization to ethylene polymerization of catalyst system (7) was occurred by exchanging the reaction pressure. Influence of ligand structure with different substitutions on sulfur atom on productivity and selectivity was investigated. 1-C6 with the high selectivity and productivity 4318 (g 1-C6/g Cr h) was obtained for catalyst (7). In the second part, 1-C6 was obtained with high selectivity and productivity around 141 × 103 (g 1-C6/g Cr h) for amine-based catalyst. All amine-based catalysts (14-16) showed considerably higher catalytic activities compared to pyridine-based catalysts. According to the TGA anal. the thermal stability of pyridine-based catalysts was found to be higher than the amine-based catalysts. Graphical Abstract: Chromium complexes bearing pyridine and amine based SNS ligands have been synthesized and their catalytic performance in ethylene oligomerization has been investigated. A switching from ethylene trimerization to ethylene polymerization of the catalyst (7) was obtained utilizing exchanging of the ethylene pressure. In the experiment, the researchers used many compounds, for example, 2,6-Pyridinedimethanol(cas: 1195-59-1HPLC of Formula: 1195-59-1)

2,6-Pyridinedimethanol(cas: 1195-59-1) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. HPLC of Formula: 1195-59-1

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In 2019,Catalysis Letters included an article by Hajjami, Maryam; Gholamian, Fatemeh; Hudson, Robert H. E.; Sanati, Ali Mohammad. Recommanded Product: 3-Hydroxybenzaldehyde. The article was titled 《FSM-16/AEPC-SO3H: Synthesis, Characterization and Its Application for the Catalytic Preparation of 1,8-Dioxo-octahydroxanthene and Tetrahydrobenzo[b]pyran Derivatives》. The information in the text is summarized as follows:

A new acidic mesoporous catalyst (FSM-16/AEPC-SO3H) was successfully synthesized and characterized by FT-IR, TGA, XRD, SEM, TEM, EDS and BET techniques. The FSM-16/AEPC-SO3H showed excellent catalytic activity for the synthesis of 1,8-dioxo-octahydroxanthene and tetrahydrobenzo[b]pyran derivatives The synthesized catalyst can also be recycled. The experimental process involved the reaction of 3-Hydroxybenzaldehyde(cas: 100-83-4Recommanded Product: 3-Hydroxybenzaldehyde)

3-Hydroxybenzaldehyde(cas: 100-83-4) can be used as a reactant along with ethyl acetoacetate and thiourea in the synthesis of corresponding dihydropyrimidine-2-thione (monastrol), using Yb(OTf)3 as a catalyst by Biginelli cyclocondensation reaction.Recommanded Product: 3-Hydroxybenzaldehyde

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In 2019,Dalton Transactions included an article by Wang, Danfeng; McBurney, Roy T.; Pernik, Indrek; Messerle, Barbara A.. Application of 100-55-0. The article was titled 《Controlling the selectivity and efficiency of the hydrogen borrowing reaction by switching between rhodium and iridium catalysts》. The information in the text is summarized as follows:

The catalytic alkylation of ketones with alcs. via the hydrogen borrowing methodol. (HB) has the potential to be a highly efficient approach for forming new carbon-carbon bonds. However, this transformation can result in more than one product being formed. The work reported here utilizes bidentate triazole-carbene ligated iridium and rhodium complexes as catalysts for the selective formation of alkylated ketone or alc. products. Switching from an iridium center to a rhodium center in the complex resulted in significant changes in product selectivity. Other factors – base, base loading, solvent and reaction temperature – were also investigated to tune the selectivity further. The optimized conditions were used to demonstrate the scope of the reaction across 17 ketones and 14 alcs. containing a variety of functional groups. A series of mechanistic investigations were performed to probe the reasons behind the product selectivity, including kinetic and deuterium studies. In the experimental materials used by the author, we found 3-Pyridinemethanol(cas: 100-55-0Application of 100-55-0)

3-Pyridinemethanol(cas: 100-55-0) belongs to pyridine. In industry and in the lab, pyridine is used as a reaction solvent, particularly when its basicity is useful, and as a starting material for synthesizing some herbicides, fungicides, and antiseptics.Application of 100-55-0

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In 2019,Dalton Transactions included an article by Yue, Jie-Yu; Wang, Ling; Ma, Yu; Yang, Peng; Zhang, Ying-Qiu; Jiang, Yu; Tang, Bo. Application of 34374-88-4. The article was titled 《Metal ion-assisted carboxyl-containing covalent organic frameworks for the efficient removal of Congo red》. The information in the text is summarized as follows:

Covalent organic frameworks (COFs) have been utilized as mol. sieves to adsorb or remove or sep. a wide range of substances. Herein, a new carboxyl-containing COF (COF-COOH) is fabricated from the polymerization of 1,3,5-triformylphloroglucinol (TP) and 4,4′-diamino-[1,1′-biphenyl]-3,3′-dicarboxylic acid (DBA). COF-COOH displays good adsorption performance on Congo red (CR) through hydrogen bonds and π-π stacking interactions. Through post-modification with Ca2+/Ni2+ ions, the adsorption capacity of COF-COOCa/COF-COONi to CR is improved, which is due to the coordinated metal cations having a pos. contribution to the electrostatic interactions. At 25°C, the maximum adsorption amount of COF-COOCa and COF-COONi to CR is 704.23 mg g-1 and 781.25 mg g-1, resp. The removal efficiency of COF-COOCa to CR is 95% and that of COF-COONi is 96%. This demonstrates that the new metal ion-assisted COFs are viable adsorbents to remove dye pollutants, which are harmful to the environment and to human health, from wastewater. After reading the article, we found that the author used 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Application of 34374-88-4)

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives.Application of 34374-88-4Phloroglucinols are known for their broad-spectrum antiviral, antibacterial, antifungal, antihelminthic, and phytotoxic activities.

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In 2019,Nature Communications included an article by Yang, Hao; Yang, Leixin; Wang, Hongjian; Xu, Ziang; Zhao, Yumeng; Luo, Yi; Nasir, Nayab; Song, Yimeng; Wu, Hong; Pan, Fusheng; Jiang, Zhongyi. Recommanded Product: 34374-88-4. The article was titled 《Covalent organic framework membranes through a mixed-dimensional assembly for molecular separations》. The information in the text is summarized as follows:

Covalent organic frameworks (COFs) hold great promise in mol. separations owing to their robust, ordered and tunable porous network structures. Currently, the pore size of COFs is usually much larger than most small mols. Meanwhile, the weak interlamellar interaction between COF nanosheets impedes the preparation of defect-free membranes. Herein, we report a series of COF membranes through a mixed-dimensional assembly of 2D COF nanosheets and 1D cellulose nanofibers (CNFs). The pore size of 0.45-1.0 nm is acquired from the sheltering effect of CNFs, rendering membranes precise mol. sieving ability, besides the multiple interactions between COFs and CNFs elevate membrane stability. Accordingly, the membranes exhibit a flux of 8.53 kg m-2 h-1 with a separation factor of 3876 for n-butanol dehydration, and high permeance of 42.8 L m-2 h-1 bar-1 with a rejection of 96.8% for Na2SO4 removal. Our mixed-dimensional design may inspire the fabrication and application of COF membranes. The experimental process involved the reaction of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Recommanded Product: 34374-88-4)

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

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In 2019,New Journal of Chemistry included an article by Anamika; Agrahari, Anand K.; Manar, Krishna K.; Yadav, Chote Lal; Tiwari, Vinod K.; Drew, Michael G. B.; Singh, Nanhai. Electric Literature of C7H9NO2. The article was titled 《Highly efficient structurally characterized novel precatalysts: di- and mononuclear heteroleptic Cu(I) dixanthate/xanthate-phosphine complexes for azide-alkyne cycloadditions》. The information in the text is summarized as follows:

Novel heteroleptic dinuclear [Cu2(L)(PPh3)4] (L = 2,6-pyridinedimethyldixanthate L1 1, 1,4-benznedimethyldixanthate L2 2, 1,4-cyclohexanedixanthate L3 3) and mononuclear [Cu(L4)(PPh3)2] 4, (L4 = piperonylxanthate) and [Cu(L5)(dppf)] (5) (L5 = methylxanthate, dppf = 1,1′-bis(diphenylphosphino)ferrocene) complexes were synthesized and characterized by elemental (C, H, and N) anal., high resolution mass spectrometry, and IR, UV-visible, 1H, 13C{1H} and 31P{1H} NMR spectroscopy. Single crystal x-ray diffraction revealed S,S-bidentate coordination of the dixanthate group in dinuclear 1-3 while 4 and 5 are mononuclear. 1-5 Adopt tetrahedral coordination geometry about the Cu atom. These precatalysts having two and one Cu(I) centers in a single mol. were applied in Cu catalyzed azide-alkyne cycloaddition (CuAAC) reactions for the synthesis of a variety of glycoconjugate triazoles using the Click approach. Particularly, the dinuclear catalyst 1, formed on the pyridyl linker based dixanthate ligand, displayed outstanding and reusable catalytic activity for this reaction. Full optimization of the reaction conditions demonstrated a Click catalytic system with low catalyst loading under mild reaction conditions.2,6-Pyridinedimethanol(cas: 1195-59-1Electric Literature of C7H9NO2) was used in this study.

2,6-Pyridinedimethanol(cas: 1195-59-1) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Electric Literature of C7H9NO2

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