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Journal articles on the topic 'Microwave-mediated synthesis'

Author: Grafiati
Published: 9 March 2023
Last updated: 10 March 2023

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1

Vázquez-Tato, M. Pilar. "Microwave-Mediated Synthesis of Amides." Synlett 1993, no. 07 (1993): 506. http://dx.doi.org/10.1055/s-1993-22508.

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2

Das, Rina, Dinesh Mehta, and Harsh Bhardawaj. "ChemInform Abstract: Microwave-Mediated Synthesis." ChemInform 44, no. 8 (February 19, 2013): no. http://dx.doi.org/10.1002/chin.201308219.

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3

Klug, Trevan, Adam Cronin, Eli O'Brien, Ryan Schioldager, Hunter Johnson, Cameron Gleason, Connor Schmid, et al. "Microwave mediated synthesis of 2-aminooxazoles." Tetrahedron Letters 88 (January 2022): 153555. http://dx.doi.org/10.1016/j.tetlet.2021.153555.

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4

Sahu, Abhishek, Pranab Goswami, and Utpal Bora. "Microwave mediated rapid synthesis of chitosan." Journal of Materials Science: Materials in Medicine 20, no. 1 (August 14, 2008): 171–75. http://dx.doi.org/10.1007/s10856-008-3549-4.

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5

Gaytko, O. M., A. E. Baranchikov, and V. K. Ivanov. "MICROWAVE-HYDROTHERMAL HEXAMETHYLENETETRAMINE-MEDIATED SYNTHESIS OF NANOCRYSTALLINE MnO2." Fine Chemical Technologies 13, no. 2 (April 28, 2018): 56–63. http://dx.doi.org/10.32362/2410-6593-2018-13-2-56-63.

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The article considers a non-conventional approach to the synthesis of various polymorphic modifications of manganese dioxide. The approach consists in hydrothermal microwave processing of a reaction mixture containing potassium permanganate and hexamethylenetetramine. We emphasize the relevance of the work due to such MnO2 properties as catalytic and photocatalytic activity, its application in accumulators, supercondensers and biochemistry. We report on the first detailed study on the role of temperature, synthesis duration and pH value on the phase composition and morphology of nanocrystalline MnO2. We show that the phase composition of manganese dioxide is largely determined not only by temperature, synthesis duration and pH value, but also by the acid added to the reaction mixture (nitric or sulphuric). In particular, the presence of sulfuric acid apparently results in α-MnO2 stabilization. It is noted that the type of the acid used in the course of the synthesis, as well as other synthesis conditions exercise no significant influence neither on the shape nor on the size of α-, γ- and δ-MnO2 particles. In contrast, the morphology of β-MnO2 turned out to be extremely sensitive to the synthesis conditions. Long (24 h) hydrothermal processing of reaction mixtures at рН 0.5-1 results in the formation of single-phase pyrolusite. The microstructure of the latter is determined by the reaction mixture composition.
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6

Link, Stephanie, Yuanzhe Zhang, and Stefan Heuser. "T3P-mediated microwave-assisted synthesis of oxazolopyridines." Results in Chemistry 3 (January 2021): 100168. http://dx.doi.org/10.1016/j.rechem.2021.100168.

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7

Spencer, John, Christine B. Baltus, Hiren Patel, Neil J. Press, Samantha K. Callear, Louise Male, and Simon J. Coles. "Microwave-Mediated Synthesis of an Arylboronate Library." ACS Combinatorial Science 13, no. 1 (November 10, 2010): 24–31. http://dx.doi.org/10.1021/co100011g.

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8

Afrasiabi, Roodabeh, Abhilash Sugunan, Robina Shahid, Muhammet S. Toprak, and Mamoun Muhammed. "Microwave mediated synthesis of semiconductor quantum dots." physica status solidi (c) 9, no. 7 (May 29, 2012): 1551–56. http://dx.doi.org/10.1002/pssc.201100545.

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9

Lambat, Trimurti L., Paavan Kavi Param Gaitry Chopra, and Sami H. Mahmood. "Microwave: A Green Contrivance for the Synthesis of N-Heterocyclic Compounds." Current Organic Chemistry 24, no. 22 (December 18, 2020): 2527–54. http://dx.doi.org/10.2174/1385272824999200622114919.

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Microwave Mediated Organic Synthesis (MMOS) is typical on the proficient heat shift carried out by dielectric heating, which in turn, is primarily dependent on the capability of the reagent or solvent to take up microwave energy. The employment of microwave energy has witnessed a fast expansion in the past two decades, with novel and pioneering applications in peptide and organic synthesis, material sciences, polymer chemistry, biochemical processes and nanotechnology. This review summarizes current MW- mediated catalytic reactions in use for the synthesis of a diversity of N-heterocycles by Multi- Component Reactions (MCRs) and a variety of miscellaneous reactions. In addition, the review addresses some aspects of the use of nanoparticles for a diversity of applications in microwave chemistry.
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10

Yadav, Ram Naresh, Indrani Banik, Ashok Kumar Srivastava, Katherine Ramos, and Bimal Krishna Banik. "Microwave-Induced Montmorillonite-Mediated Facile Synthesis of Enamines." Asian Journal of Chemistry 32, no. 2 (December 30, 2019): 249–54. http://dx.doi.org/10.14233/ajchem.2020.22169.

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Montmorillonite clay-mediated simple and high yielding protocol for the synthesis of various enamines with secondary amines and ketones is developed under microwave condition. This protocol is very convenient to accesses the enamines from cyclic amines with various carbonyl compounds in high yield under mild reaction conditions with short reaction time.
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11

Wagh, Yogesh B., and Dipak S. Dalal. "Microwave-Assisted Domino Cyclization Reactions." Current Microwave Chemistry 8, no. 3 (December 2021): 140–72. http://dx.doi.org/10.2174/2213335608666211006121803.

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Background: Microwave-assisted domino cyclization reactions have attracted great interest for researchers to synthesize complex compounds in shorter times with increased yields. The domino reactions were used in various synthetic approaches and many drug deliveries in medicinal chemistry with microwave-assisted approaches. Methods: Microwave irradiation has been applied for various domino reactions. The research related to microwave-assisted domino cyclization was reviewed and the important methodologies were collected from 2011-2021. Results: Only those methodologies that involve microwave-assisted domino cyclization reactions during synthesis in a related manner have been reviewed. Along with some recent syntheses that are microwave-assisted regarding new heterocyclic moieties are summarized. Conclusion: Microwave-assisted domino cyclization reactions can be employed to quickly explore and increase molecular diversity in synthetic chemistry. We hope that this review will be helpful to find out complex molecule synthesis by microwave-assisted domino cyclization reactions. This review aimed to explain the applications of microwaves for the domino reactions from 2011- 2021. In this respect, microwave-mediated methods help researchers to make helpful studies.
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12

Chang, Yu-Chen, Muraleedharan G. Nair, Ross C. Santell, and William G. Helferich. "Microwave-Mediated Synthesis of Anticarcinogenic Isoflavones from Soybeans." Journal of Agricultural and Food Chemistry 42, no. 9 (September 1994): 1869–71. http://dx.doi.org/10.1021/jf00045a007.

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13

Schwarz, Lachlan J., Mahesh K. Potdar, Basil Danylec, Reinhard I. Boysen, and Milton T. W. Hearn. "Microwave-assisted synthesis of resveratrol imprinted polymers with enhanced selectivity." Analytical Methods 7, no. 1 (2015): 150–54. http://dx.doi.org/10.1039/c4ay02518k.

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14

Ghosh, Amrita, and Shital K. Chattopadhyay. "Microwave-mediated Synthesis of Medium Ring-sized Heterocyclic Compounds." Current Microwave Chemistry 7, no. 2 (August 6, 2020): 123–44. http://dx.doi.org/10.2174/2213335607666200226101602.

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Many medium ring-sized heterocyclic motifs are found in naturally occurring compounds of significant biological activity which led to the investigation of the biological activity of simpler heterocyclic compounds accommodating these ring systems. Therefore, the development of newer synthetic methodologies to access such ring systems has remained an important activity over the last few decades. However, common methods of their synthesis are usually associated with thermodynamic disadvantages. Many metal-mediated transformations e.g., Heck reaction, Suzuki reaction, etc. tend to overcome some of these effects but at the cost of environmental disadvantages. In recent years, several green chemical techniques have found useful applications in the synthesis of such ring systems. In particular, the use of microwave technology has provided better opportunities. The present review attempts to highlight many synthetic approaches developed for the synthesis of such heterocyclic scaffolds of pharmacological interest involving condensation reaction, coupling reaction, Multi-component reaction, Cyclo-addition reaction, Dipolar cycloaddition reaction, etc. An emphasis has also been given on the distinct advantages offered by microwave application over classical approaches, wherever such knowledge is available.
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15

Singh, Surjeet, Shally Shally, Ranjay Shaw, Reena Yadav, Abhinav Kumar, and Ramendra Pratap. "Microwave directed metal-free regiodivergent synthesis of 1,2-teraryls and study of supramolecular interactions." RSC Advances 6, no. 18 (2016): 14768–77. http://dx.doi.org/10.1039/c5ra25752b.

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16

Akanksha and Debabrata Maiti. "Microwave-assisted palladium mediated decarbonylation reaction: synthesis of eulatachromene." Green Chemistry 14, no. 8 (2012): 2314. http://dx.doi.org/10.1039/c2gc35622h.

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17

Lopalco, Maria, Eftychia N. Koini, Jin Ku Cho, and Mark Bradley. "Catch and release microwave mediated synthesis of cyanine dyes." Organic & Biomolecular Chemistry 7, no. 5 (2009): 856. http://dx.doi.org/10.1039/b820719b.

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18

Babu, Punuri Jayasekhar, Ratul Kumar Das, Anil Kumar, and Utpal Bora. "Microwave-Mediated Synthesis of Gold Nanoparticles Using Coconut Water." International Journal of Green Nanotechnology 3, no. 1 (January 2011): 13–21. http://dx.doi.org/10.1080/19430892.2011.574534.

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19

Close, Adam J., Paul Kemmitt, Matthew K. Emmerson, and John Spencer. "Microwave-mediated synthesis of N-methyliminodiacetic acid (MIDA) boronates." Tetrahedron 70, no. 47 (November 2014): 9125–31. http://dx.doi.org/10.1016/j.tet.2014.09.044.

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20

Locos, Oliver B., Claudia C. Heindl, Ariadna Corral, Mathias O. Senge, and Eoin M. Scanlan. "Efficient Synthesis of Glycoporphyrins by Microwave-Mediated “Click” Reactions." European Journal of Organic Chemistry 2010, no. 6 (January 12, 2010): 1026–28. http://dx.doi.org/10.1002/ejoc.200901292.

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21

Bessoi, Monalisa, Siba Soren, and Purnendu Parhi. "Rapid microwave mediated hydrothermal synthesis of complex ternary fluorides." Ceramics International 42, no. 2 (February 2016): 3697–700. http://dx.doi.org/10.1016/j.ceramint.2015.10.149.

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22

Cundy, Colin S. "Microwave Techniques in the Synthesis and Modification of Zeolite Catalysts. A Review." Collection of Czechoslovak Chemical Communications 63, no. 11 (1998): 1699–723. http://dx.doi.org/10.1135/cccc19981699.

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Microwave dielectric heating is a convenient and effective way of bringing about chemical reactions in suitable (usually polar) media. Microwave-mediated organic synthesis has been the subject of considerable research and microwave heating is being increasingly applied to the synthesis and modification of zeolites and related microporous and mesoporous catalysts. The observed rate enhancements are caused by a variety of thermal effects, including very high rates of temperature rise, bulk superheating and (in non-homogeneous systems) differential heating. Specific, non-thermal activation is unlikely and can usually be excluded. The microwave synthesis of zeolites, zeotypes and mesoporous materials is reviewed, with emphasis on those aspects which differ from conventional thermal methods. Such standard methods are not displaced by microwave techniques and may in some instances be preferable. However, microwave synthesis does offer a high probability of rapid (and in some cases selective) reaction to give a pure product of good crystal quality. Non-synthetic applications of microwave heating in zeolite catalysis are also briefly described. A review with 118 references.
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23

McReynolds, Katherine, Dustin Dimas, Grace Floyd, and Kara Zeman. "Development of a Microwave-assisted Chemoselective Synthesis of Oxime-linked Sugar Linkers and Trivalent Glycoclusters." Pharmaceuticals 12, no. 1 (March 14, 2019): 39. http://dx.doi.org/10.3390/ph12010039.

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A rapid, high-yielding microwave-mediated synthetic procedure was developed and optimized using a model system of monovalent sugar linkers, with the ultimate goal of using this method for the synthesis of multivalent glycoclusters. The reaction occurs between the aldehyde/ketone on the sugars and an aminooxy moiety on the linker/trivalent core molecules used in this study, yielding acid-stable oxime linkages in the products and was carried out using equimolar quantities of reactants under mild aqueous conditions. Because the reaction is chemoselective, sugars can be incorporated without the use of protecting groups and the reactions can be completed in as little as 30 min in the microwave. As an added advantage, in the synthesis of the trivalent glycoclusters, the fully substituted trivalent molecules were the major products produced in excellent yields. These results illustrate the potential of this rapid oxime-forming microwave-mediated reaction in the synthesis of larger, more complex glycoconjugates and glycoclusters for use in a wide variety of biomedical applications.
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24

Lamberto, Massimiliano. "Synthesis of tricyclic indolizidines from ethyl isocyanoacetate." Heterocyclic Communications 21, no. 3 (June 1, 2015): 153–57. http://dx.doi.org/10.1515/hc-2015-0047.

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AbstractTricyclic indolizidines were synthesized in good yields from commercially available ethyl isocyanoacetate by a novel sequential alkylation, thiol-mediated radical cyclization, N-alkylation, and microwave-assisted Pauson-Khand reaction.
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25

Bhagyalakshmi, H., and B. S. Surendra. "Glycerol transformation to pharmaceutically important aryloxypropanediols by microwave mediated synthesis." Current Research in Green and Sustainable Chemistry 5 (2022): 100251. http://dx.doi.org/10.1016/j.crgsc.2021.100251.

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26

Teske, Jesse A., and Alexander Deiters. "Microwave-Mediated Nickel-Catalyzed Cyclotrimerization Reactions: Total Synthesis of Illudinine." Journal of Organic Chemistry 73, no. 1 (January 2008): 342–45. http://dx.doi.org/10.1021/jo7020955.

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27

Demir, Ayhan S., Hamide Findik, Nezire Saygili, and N. Tuna Subasi. "Manganese(III) acetate-mediated synthesis of biaryls under microwave irradiation." Tetrahedron 66, no. 6 (February 2010): 1308–12. http://dx.doi.org/10.1016/j.tet.2009.12.018.

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28

Darweesh, Ahmed F., Ahmed E. M. Mekky, Amani A. Salman, and Ahmad M. Farag. "Efficient, microwave-mediated synthesis of benzothiazole- and benzimidazole-based heterocycles." Research on Chemical Intermediates 42, no. 5 (September 24, 2015): 4341–58. http://dx.doi.org/10.1007/s11164-015-2279-8.

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29

Banik, Indrani, Frederick F. Becker, and Bimal K. Banik. "Microwave-Mediated Chiral Synthesis of O-Glycosides of β-Lactams." Asian Journal of Organic and Medicinal Chemistry 3, no. 3 (2018): 54–57. http://dx.doi.org/10.14233/ajomc.2018.ajomc-p81.

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30

Zhu, Ming-Qiang, Zheng Gu, Jun-Bing Fan, Xiao-Bo Xu, Jing Cui, Jin-Hua Liu, and Feng Long. "Microwave-Mediated Nonaqueous Synthesis of Quantum Dots at Moderate Temperature." Langmuir 25, no. 17 (September 2009): 10189–94. http://dx.doi.org/10.1021/la900962t.

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31

Campisciano, Vincenzo, Serena Riela, Renato Noto, Michelangelo Gruttadauria, and Francesco Giacalone. "Efficient microwave-mediated synthesis of fullerene acceptors for organic photovoltaics." RSC Adv. 4, no. 108 (November 17, 2014): 63200–63207. http://dx.doi.org/10.1039/c4ra10495a.

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32

VAZQUEZ-TATO, M. P. "ChemInform Abstract: Microwave-Mediated Synthesis of Amides, e. g. (III)." ChemInform 25, no. 10 (August 19, 2010): no. http://dx.doi.org/10.1002/chin.199410145.

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33

Álvaro-Muñoz, T., E. Sastre, and C. Márquez-Álvarez. "Microwave-assisted synthesis of plate-like SAPO-34 nanocrystals with increased catalyst lifetime in the methanol-to-olefin reaction." Catal. Sci. Technol. 4, no. 12 (2014): 4330–39. http://dx.doi.org/10.1039/c4cy00775a.

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34

Santana-Romo, Fabián, Yorley Duarte, Francisco Castillo, Miguel A. Maestro, and Flavia C. Zacconi. "Microwave-Mediated Synthesis of N-allyl/Propargyl Derivatives: Enzymatic Analysis as a Potential Factor Xa (FXa) Inhibitor, Theoretical and Computational Molecular Docking." International Journal of Chemical Engineering and Applications 11, no. 1 (February 2020): 34–41. http://dx.doi.org/10.18178/ijcea.2020.11.1.776.

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35

Barmase, Krishn Kumar, Deepak Basedia, and Balkrishna Dubey. "Microwave Mediated Synthesis of Novel 1,3,5-Triazine Derivative and their Biological Evaluation." International Journal of Research in Engineering, Science and Management 3, no. 12 (January 3, 2021): 181–85. http://dx.doi.org/10.47607/ijresm.2020.433.

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1,3,5-Triazine derivative are synthesized by replacement of chloride ions of Cyanuric chloride and 1,3,5-Triazine derivative are showing promising biologically activity such as Antibacterial, Antifungal, Antimalarial, Antivirus, Anticancer that’s why interest of researches on synthesis of 1,3,5-Triazine derivatives always in focused. The present study reported the synthesis of 2,4,6-Trisubstituted 1,3,5-Triazine derivatives by Microwave mediated Method which gave the desired result in less time with higher yield. The structure of 1,3,5-Triazine derivatives have been elucidated by Spectral of IR, NMR and MASS. The derivative of 1,3,5-Triazine are evaluated for their In vitro Antibacterial activity against Gram Positive and Gram Negative Bacterial species and shown good Antibacterial effect.
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36

Tănase, Maria Antonia, Maria Marinescu, Petruta Oancea, Adina Răducan, Catalin Ionut Mihaescu, Elvira Alexandrescu, Cristina Lavinia Nistor, et al. "Antibacterial and Photocatalytic Properties of ZnO Nanoparticles Obtained from Chemical versus Saponaria officinalis Extract-Mediated Synthesis." Molecules 26, no. 7 (April 4, 2021): 2072. http://dx.doi.org/10.3390/molecules26072072.

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In the present work, the properties of ZnO nanoparticles obtained using an eco-friendly synthesis (biomediated methods in microwave irradiation) were studied. Saponaria officinalis extracts were used as both reducing and capping agents in the green nanochemistry synthesis of ZnO. Inorganic zinc oxide nanopowders were successfully prepared by a modified hydrothermal method and plant extract-mediated method. The influence of microwave irradiation was studied in both cases. The size, composition, crystallinity and morphology of inorganic nanoparticles (NPs) were investigated using dynamic light scattering (DLS), powder X-ray diffraction (XRD), SEM-EDX microscopy. Tunings of the nanochemistry reaction conditions (Zn precursor, structuring agent), ZnO NPs with various shapes were obtained, from quasi-spherical to flower-like. The optical properties and photocatalytic activity (degradation of methylene blue as model compound) were also investigated. ZnO nanopowders’ antibacterial activity was tested against Gram-positive and Gram-negative bacterial strains to evidence the influence of the vegetal extract-mediated synthesis on the biological activity.
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37

Rasvan Khan, P., K. Deepti, P. Kamble Dhanraj, Ravi Kumar Devarakonda, Naga Raju Talam, Kavuluri Pushpalatha, and Mandava V. Basaveswara Rao. "Magnesium catalyzed biphasic solvent mediated microwave assisted synthesis of 5-hydroxymethylfurfural." Chemical Data Collections 34 (August 2021): 100728. http://dx.doi.org/10.1016/j.cdc.2021.100728.

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38

Mendoza-Pérez, Eduardo, and Alfredo Vázquez. "Microwave-assisted synthesis of isoindolinones via Pd-mediated tandem coupling reactions." Heterocyclic Communications 24, no. 3 (June 27, 2018): 129–33. http://dx.doi.org/10.1515/hc-2018-0029.

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AbstractPalladium (Pd) coupling reactions have become an indispensable tool in modern synthetic organic chemistry. A simple procedure to obtain isoindolinones 7 bearing a quaternary C-atom, featuring a Pd-mediated tandem process, is presented. Readily available iodoamidoacrylate 3 and boronic acids 6 are used as the starting materials.
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39

Wu, Renbing, Kun Zhou, Zhihong Yang, Xukun Qian, Jun Wei, Lie Liu, Yizhong Huang, Lingbing Kong, and Liuying Wang. "Molten-salt-mediated synthesis of SiC nanowires for microwave absorption applications." CrystEngComm 15, no. 3 (2013): 570–76. http://dx.doi.org/10.1039/c2ce26510a.

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40

Barreto, Angélica de Fátima S., and Carlos Kleber Z. Andrade. "Microwave-mediated synthesis of a cyclic heptapeptoid through consecutive Ugi reactions." Tetrahedron 74, no. 48 (November 2018): 6861–65. http://dx.doi.org/10.1016/j.tet.2018.10.018.

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41

Lee, Jong Chan, and In-Goul Song. "Mercury(II) p-toluenesulfonate mediated synthesis of oxazoles under microwave irradiation." Tetrahedron Letters 41, no. 31 (July 2000): 5891–94. http://dx.doi.org/10.1016/s0040-4039(00)00929-1.

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42

Bukhari, Bushra S., M. Imran, Mahwish Bashir, Saira Riaz, and Shahzad Naseem. "Honey mediated microwave assisted sol–gel synthesis of stabilized zirconia nanofibers." Journal of Sol-Gel Science and Technology 87, no. 3 (August 9, 2018): 554–67. http://dx.doi.org/10.1007/s10971-018-4749-0.

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43

Trần Thị Kiều, Anh, and Trung Đặng Bảo. "Polyol-mediated synthesis of size-controlled copper nanoparticles under microwave irradiation." Journal of Science and Technology Issue on Information and Communications Technology 17, no. 12.1 (December 31, 2019): 21. http://dx.doi.org/10.31130/jst-ud2019-093e.

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In this research, well-dispersed zero-valent copper nanoparticles (CuNPs) were successfully synthesized from a well-defined complex of [Cu(OH)(TMEDA)]2Cl2 in neat glycerol via a polyol method, under microwave irradiation (MW) assistance. The as-prepared CuNPs were thoroughly characterized by means of various techniques such as inductively coupled plasma mass spectrometry (ICP-MS), Ultraviolet-visible spectroscopy (UV-vis), X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses, evidencing the formation of the spherical nanoparticles with the range of 3.24.2 nm in mean diameter. In addition, the size control of obtained CuNPs was examined via reaction time, thereby showing that the formation of CuNPs conformed to the model of “mono-dispersion”.
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44

Sondhi, Sham M., and Reshma Rani. "Microwave-mediated one step synthesis of tri- and tetracyclic heterocyclic molecules." Green Chemistry Letters and Reviews 3, no. 2 (June 2010): 115–20. http://dx.doi.org/10.1080/17518250903583706.

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45

Akanksha, Akanksha, and Debabrata Maiti. "ChemInform Abstract: Microwave-Assisted Palladium-Mediated Decarbonylation Reaction: Synthesis of Eulatachromene." ChemInform 43, no. 51 (December 10, 2012): no. http://dx.doi.org/10.1002/chin.201251049.

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46

López‐Rodríguez, Alberto, Gema Domínguez, and Javier Pérez‐Castells. "Microwave‐Mediated Sulfonium Ylide Cyclopropanation. Stereoselective Synthesis of Cyclopropa[c]pentalenes." ChemistrySelect 2, no. 8 (March 13, 2017): 2565–68. http://dx.doi.org/10.1002/slct.201700432.

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47

Lefever, Mark, Jerome W. Kosmeder, Michael Farrell, and Christopher Bieniarz. "Microwave-Mediated Synthesis of Labeled Nucleotides with Utility in the Synthesis of DNA Probes." Bioconjugate Chemistry 21, no. 10 (October 20, 2010): 1773–78. http://dx.doi.org/10.1021/bc100013b.

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48

O'Brien, Nicholas S., and Adam McCluskey. "A Facile Microwave and SnCl2 Synthesis of 2,3-Dihydroquinazolin-4(1H)-ones." Australian Journal of Chemistry 73, no. 12 (2020): 1176. http://dx.doi.org/10.1071/ch20101.

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An elegantly simple, facile, and robust approach to a scaffold of biological importance, 2,3-dihydroquinazolin-4(1H)-ones, is reported. A catalytic 1% SnCl2/microwave-mediated approach afforded access to pure material, collected by cooling and filtration after 20-min microwave irradiation at 120°C. A total of 41 analogues were prepared in isolated yields of 17–99%. This process was highly tolerant of aliphatic, aromatic, heterocyclic, and acyclic aldehydes, but furan, pyrrole, and thiophene aldehyde reactivity correlated with propensity towards electrophilic addition and/or Diels–Alder addition. As a result, thiophene afforded high yields (80%) whereas pyrrole carboxaldehyde failed to react. With simple cinnamaldehydes, and in the SbCl3-mediated reaction, and with α,β-unsaturated aldehydes the equivalent quinazolin-4(3H)-ones, and not the 2,3-dihydroquinazolin-4(1H)-ones, was favoured.
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49

Nguyen, Hoang Chinh, Fu-Ming Wang, Kim Khue Dinh, Thanh Truc Pham, Horng-Yi Juan, Nguyen Phuong Nguyen, Hwai Chyuan Ong, and Chia-Hung Su. "Microwave-Assisted Noncatalytic Esterification of Fatty Acid for Biodiesel Production: A Kinetic Study." Energies 13, no. 9 (May 1, 2020): 2167. http://dx.doi.org/10.3390/en13092167.

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This study developed a microwave-mediated noncatalytic esterification of oleic acid for producing ethyl biodiesel. The microwave irradiation process outperformed conventional heating methods for the reaction. A highest reaction conversion, 97.62%, was achieved by performing esterification with microwave irradiation at a microwave power of 150 W, 2:1 ethanol:oleic acid molar ratio, reaction time of 6 h, and temperature of 473 K. A second-order reaction model (R2 of up to 0.997) was established to describe esterification. The reaction rate constants were promoted with increasing microwave power and temperature. A strong linear relation of microwave power to pre-exponential factors was also established, and microwave power greatly influenced the reaction due to nonthermal effects. This study suggested that microwave-assisted noncatalytic esterification is an efficient approach for biodiesel synthesis.
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Yao, Maomao, Jinkun Huang, Zihao Deng, Wenying Jin, Yali Yuan, Jinfang Nie, Hua Wang, Fuyou Du, and Yun Zhang. "Transforming glucose into fluorescent graphene quantum dots via microwave radiation for sensitive detection of Al3+ ions based on aggregation-induced enhanced emission." Analyst 145, no. 21 (2020): 6981–86. http://dx.doi.org/10.1039/d0an01639j.

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Abstract:
This work initially describes the microwave-assisted synthesis of graphene quantum dots (GQDs) for fluorescence detection of Al3+ ions based on the analyte-mediated aggregation of GQDs leading to aggregation-induced enhanced emission (AIEE).
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