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Showing 1-30 of 37 results for "326755" within Papers
Qun Zhang et al.
Organic & biomolecular chemistry, 10(14), 2847-2854 (2012-03-06)
A highly efficient copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) of 6-substituted tetrazolo[1,5-a]pyridines was developed for the preparation of 1-(pyridin-2-yl)-1,2,3-triazoles by simply using copper(I) acetate as a catalyst. The in situ formed HOAc played important dual roles and an activation of 2-azidopyridine-copper(I) complex
K Bhattacharya et al.
Dalton transactions (Cambridge, England : 2003), 44(19), 9221-9229 (2015-04-25)
Research on energy storage devices has created a niche owing to the ever increasing demand for alternative energy production and its efficient utilisation. Here, a novel composite of Fe3O4 nanospheres and carbon quantum dots (C-dots) have been synthesized by a
Josephine Al-Alam et al.
Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes, 50(11), 788-796 (2015-09-12)
Pesticides are a real concern for the society as their use has become critical, leading sometimes to their accumulation as residues in fruits and vegetables. After examining the pesticides sold in Northern Lebanon, this study is focused on the analysis
Pepa Dimitrova et al.
Analytica chimica acta, 663(1), 109-116 (2010-02-23)
The influence of non-ionic surfactants on the selectivity and retention in the ligand exchange chromatography for the enantioselective separation of racemic mixtures of the amino acids dl-methionine, dl-leucine, dl-valine and dl-tyrosine applying chiral mobile phases was investigated, whereas five different
Sodeh Sadjadi et al.
Ultrasonics sonochemistry, 18(2), 480-483 (2010-09-02)
A new, convenient method for the syntheses of 2-arylbenzothiazoles is described in the presence of catalytic amounts of Cu(OAc)(2)/MCM-41 under ultrasonic irradiation. Short reaction times, easy and quick isolation of the products, reusability of the catalyst and excellent yields are
Yijia Li et al.
Antimicrobial agents and chemotherapy, 59(7), 4148-4156 (2015-05-06)
Aminoglycosides (AGs) are clinically relevant antibiotics used to treat infections caused by both Gram-negative and Gram-positive bacteria, as well as Mycobacteria. As with all current antibacterial agents, resistance to AGs is an increasing problem. The most common mechanism of resistance
Masato Miyakawa et al.
Nanoscale, 6(15), 8720-8725 (2014-06-21)
Continuous synthesis of Pd@Pt and Cu@Ag core-shell nanoparticles was performed using flow processes including microwave-assisted Pd (or Cu) core-nanoparticle formation followed by galvanic displacement with a Pt (or Ag) shell. The core-shell structure and the nanoparticle size were confirmed using
Microwave-assisted efficient copper-promoted N-arylation of amines with arylboronic acids.
Shiyu Chen et al.
Journal of combinatorial chemistry, 10(3), 358-360 (2008-04-09)
Anthony Musumeci et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 67(1), 48-57 (2007-02-27)
A comprehensive spectroscopic analysis consisting of Raman, infrared (IR) and near infrared (NIR) spectroscopy was undertaken on the newly discovered mineral hoganite (copper(II) acetate monohydrate (Cu(CH(3)COO)(2) x H(2)O)). Assignments of vibrational bands due to the acetate anion have been made
Zhiyuan Chen et al.
Chemical communications (Cambridge, England), 48(33), 3975-3977 (2012-03-17)
A cascade reaction of N'-(2-alkynylbenzylidene)hydrazide with allenoate in the presence of dioxygen co-catalyzed by silver triflate and copper(II) acetate under mild conditions is described, which provides an efficient approach to 2-carbonyl H-pyrazolo[5,1-a]isoquinolines.
Martyn Inman et al.
The Journal of organic chemistry, 75(17), 6023-6026 (2010-08-10)
A Cu(II)-mediated synthesis of indolequinones from the corresponding bromoquinones and enamines is reported. The key oxidative cyclization proceeds in good yield for a broad range of substrates and can be performed on a multigram scale, allowing access to biologically interesting
Dohyung Kim et al.
Nature communications, 5, 4948-4948 (2014-09-12)
Highly efficient and selective electrochemical reduction of carbon dioxide represents one of the biggest scientific challenges in artificial photosynthesis, where carbon dioxide and water are converted into chemical fuels from solar energy. However, our fundamental understanding of the reaction is
Mohamed E Mahmoud et al.
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 50(10), 1072-1081 (2015-06-30)
In this work, dioctyl phthalate (Dop) was used as a highly plasticizing material to coat and link the surface of basic cellulose (Cel) with baker's yeast for the formation of a novel modified cellulose biosorbent (Cel-Dop-Yst). Characterization was accomplished by
Jinlong Zhao et al.
The Journal of organic chemistry, 73(18), 7428-7431 (2008-08-16)
Mild conditions have been developed to achieve Pd(OAc)2-catalyzed regioselective cross-coupling between indoles and potassium aryltrifluoroarylborates in the presence of Cu(OAc)2 in acetic acid at room temperature. A variety of potassium aryltrifluoroborates selectively undergo the direct arylation across indoles and afford
Gautam Das et al.
International journal of nanomedicine, 10 Spec Iss, 165-178 (2015-09-09)
In this work, three different spherulitic nanostructures Cu-CuOA, Cu-CuOB, and Cu-CuOC were synthesized in water-in-oil microemulsions by varying the surfactant concentration (30 mM, 40 mM, and 50 mM, respectively). The structural and morphological characteristics of the Cu-CuO nanostructures were investigated
Celly M S Izumi et al.
The journal of physical chemistry. B, 109(47), 22131-22140 (2006-07-21)
This work emphasizes the important role of the synthetic parameters in the structure of the polymeric material obtained in the aniline polymerization. The polymers formed by the oxidative polymerization of aniline by copper(II) ions in acidic aqueous solution, acetonitrile/water medium
Uthaiwan Sirion et al.
Carbohydrate research, 345(16), 2401-2407 (2010-10-01)
An efficient and convenient method for the synthesis of 2-deoxy-2-iodo-O-glycosides from tri-O-acetyl-D-glucal with various alcohols by using I₂-Cu(OAc)₂ is described. The 21 examples of corresponding glycosides were obtained in high yields, with good anomeric selectivity.
An efficient synthesis of novel isoxazole bearing pyrazole derivatives via [3+ 2] heteroannulation using cupric acetate
B Audichya, et al.
Journal of Heterocyclic Chemistry, 59, 341-350 (2022)
Yi-Chi Chien
Journal of environmental quality, 41(2), 449-453 (2012-03-01)
Halogenated synthetic organic compounds are used in a wide variety of pesticides, solvents, refrigerants, fire retardants, and paints that cause extensive pollution to the air, surface water, groundwater, and soils. Carbon tetrachloride (CCl) is a typical halogenated synthetic organic compound
Dong Lei Wu et al.
Water environment research : a research publication of the Water Environment Federation, 84(11), 2060-2069 (2013-01-30)
Biomass char was prepared from mulberry branches by physical activation. An examination by Fourier transform infrared spectroscopy (FTIR) indicated that the functional groups of Si-O were mostly burnt out, significantly decreasing the ash content Analysis of data from a scanning
Kosuke Suzuki et al.
Dalton transactions (Cambridge, England : 2003), 44(32), 14220-14226 (2015-05-23)
Structurally well-defined hetero-pentanuclear manganese-oxide clusters {MMn4} were successfully synthesized in TBA7Hn[MMn4(OH)2(A-α-SiW9O34)2]·2H2O·C2H4Cl2 (, M = Fe(iii), Co(ii), Ni(ii), Cu(ii), Ga(iii)) by sequential introduction of metal cations into the trivacant lacunary polyoxometalates (POMs). The pentanuclear manganese-oxide cluster {Mn5} showed a small spin
Jianjun Yang et al.
Analytical chemistry, 83(20), 7856-7862 (2011-08-03)
Photoreduction is a major obstacle for using the X-ray absorption near-edge structure (XANES) fingerprint to perform metal speciation at the molecular level in biological and environmental samples, especially for metalloproteins. In this study, soft X-ray induced photoreduction was observed in
Li Zhang et al.
Molecules (Basel, Switzerland), 18(1), 654-665 (2013-01-08)
Microwave-promoted efficient synthesis of a (Z)-3-methyleneisoindolin-1-one library from 2-bromobenzamides and terminal alkynes using Cu(OAc)₂•H₂O/DBU is described. Various benzamide substituents, ring substitutions, including heteroaryl, aryl acetylenes and aliphatic alkynes, could be applied to afford the desired products in good to moderate
Cinthia da S Lisboa et al.
The Journal of organic chemistry, 76(13), 5264-5273 (2011-05-25)
The oxidative addition of anilines (2) with 1,4-naphthoquinone (3) to give N-aryl-2-amino-1,4-naphthoquinones (1) was found to be catalyzed by copper(II) acetate. In the absence of the catalyst, the reactions are slower and give lower yields with the formation of many
Alex John et al.
The Journal of organic chemistry, 76(10), 4158-4162 (2011-03-16)
The Cu(OAc)(2)-catalyzed, O(2)-mediated amidation of 2-phenylpyridine via C-H bond activation is reported. A variety of nitrogen reagents including sulfonamides, carboxamides, and anilines participate in the reaction in moderate to good yields.
Anitha M Thomas et al.
Journal of controlled release : official journal of the Controlled Release Society, 150(2), 212-219 (2010-11-26)
5-Fluorouracil (5-FU) is a small, very membrane permeable drug that is poorly retained within the aqueous compartment of liposomal nanoparticles (LNP). To address this problem a novel method relying on formation of a ternary complex comprising copper, low molecular weight
Xinxia Wang et al.
PloS one, 10(3), e0122028-e0122028 (2015-04-01)
Obesity may result from altered fatty acid (FA) disposal. Altered FA distribution in obese individuals is poorly understood. Lean wild-type C57BL/6J and obese C57BL/6Job/ob mice received an oral dose of [1-(14)C]18:1n-9 (oleic acid), and the radioactivity in tissues was evaluated
John Mondal et al.
Chemical communications (Cambridge, England), 48(64), 8000-8002 (2012-07-10)
Surface functionalization of SBA-15 followed by its reaction with Cu(OAc)(2) has been carried out to develop a new Cu-grafted functionalized mesoporous material, which catalyzes one-pot three component coupling of different aryl halides with thiourea and benzyl bromide in aqueous medium
Heather A Michaels et al.
Chemistry, an Asian journal, 6(10), 2825-2834 (2011-09-29)
Polytriazole ligands such as the widely used tris[(1-benzyl-1H-1,2,3-triazol-4-yl)methyl]amine (TBTA), are shown to assist copper(II) acetate-mediated azide-alkyne cycloaddition (AAC) reactions that involve nonchelating azides. Tris(2-{4-[(dimethylamino)methyl]-1H-1,2,3-traizol-1-yl}ethyl)amine (DTEA) outperforms TBTA in a number of reactions. The satisfactory solubility of DTEA in a wide
J M de la Roja et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 68(4), 1120-1125 (2007-09-18)
Verdigris is an historical pigment of synthetic origin widely used in the artistic scope, from the antiquity to beginning of 19th century. It is a greenish or green-bluish colored product resulting from corrosion of pure copper and alloys caused by
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