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Microwave Irradiation (microwave + irradiation)
Terms modified by Microwave Irradiation Selected AbstractsSolid-Phase Reactive Chromatography (SPRC): A New Methodology for Wittig and Horner,Emmons Reactions on a Column under Microwave IrradiationEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 2 2010Saada C. Dakdouki Abstract A new methodology named solid-phase reactive chromatography (SPRC), which combines reaction, separation, and purification into a single unit for the preparation of small samples, is described. This method was illustrated in the synthesis of some natural bioactive compounds, namely, methoxylated analogues of resveratrol, alkylresorcinols, and 5-aryl-2,4-pentadienoates, over a column of alumina-KF under microwave irradiation by using the Wittig and Horner,Emmons reactions. This approach permitted the preparation of the target olefins with high purity and good to excellent yields in short reaction times. [source] On the Synthesis of Carbon Nanofibers and Nanotubes by Microwave Irradiation: Parameters, Catalysts, and SubstratesADVANCED FUNCTIONAL MATERIALS, Issue 17 2009Tamara Druzhinina Abstract The microwave (MW)-assisted synthesis of one dimensional carbon systems is introduced as a promising approach to improve the speed and cost-effectiveness of the fabrication process. Improved reaction conditions are generated by direct MW heating and synthesis under advanced reaction conditions. The influence of the reaction conditions is investigated and the importance of individual process parameters on the synthesis is discussed. Temperature and pressure data recorded during the irradiation process are analyzed in detail and allow the determination of essential process parameters. This leads to improved reaction conditions, better control of the one-dimensional carbon nanosystems by tuning the catalyst materials, and allows expanding this approach to initiate the synthesis on a variety of different substrates, such as quartz glass and mica. [source] Strong Carbon-Nanotube,Polymer Bonding by Microwave Irradiation,ADVANCED FUNCTIONAL MATERIALS, Issue 12 2007Y. Wang Abstract The vigorous response of multiwalled carbon nanotubes (MWNTs) to microwave irradiation, leading to the release of a large amount of heat, is used to locally melt a plastic matrix adjacent to the nanotubes within a period of seconds. This results in the intercalation of the MWNTs into the polymer matrix at room temperature without any physical damage to the polymer. The so-called "microwave welding" approach creates a new paradigm for the formation of very strong MWNT,polymer bonds without the use of any adhesive, and represents a significant step forward for the fabrication of functional nanotube composites. Here, we demonstrate the implications of the anisotropic alignment of MWNTs in polymers, patterned conductors/resistors for soft electronics, and high-strength composites, where the MWNTs are ,soldered' to flexible polymer substrates. [source] A Selective Transformation of Flavanones to 3-Bromoflavones and Flavones Under Microwave IrradiationADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 1-2 2006Zhongzhen Zhou Abstract This paper presents the first report of a highly selective transformation of flavanones to 3-bromoflavones or flavones by microwave irradiation of the corresponding flavanone reactants and N -bromosuccinimide (NBS) in the presence of a catalytic amount of 2,2,-azobis(isobutyronitrile) (AIBN). The combination of good to excellent yields, shorter reaction time (10,min), and high levels of functional group compatibility make this an attractive synthetic approach to 3-bromoflavones and flavones. [source] Influence of Microwave Irradiation on the Lipase-Catalyzed Ring-Opening Polymerization of , -CaprolactoneMACROMOLECULAR RAPID COMMUNICATIONS, Issue 9 2006Patrick Kerep Abstract Summary: The microwave (MW)-assisted lipase-catalyzed ring-opening polymerization of , -caprolactone in boiling solvents was investigated for the first time. In case of boiling toluene or benzene the MW-assisted reaction proceeded significantly slower compared to oil bath heating. On the other hand, using boiling diethyl ether as solvent, an increase of the polymerization rate due to MW irradiation was found. Yield, molecular weight measurements, and MALDI-TOF analysis supported the results. Reactivity of the MW-assisted ring-opening polymerization of , -caprolactone compared with conventional thermal heating in different solvents. [source] A Rapid Eco-Friendly Synthesis of Poly(butylene succinate) by a Direct Polyesterification under Microwave IrradiationMACROMOLECULAR RAPID COMMUNICATIONS, Issue 14 2005Sivan Velmathi Abstract Summary: A rapid and eco-friendly synthesis of poly(butylene succinate) (PBS) using microwaves was developed in the presence of 1,3-dichloro-1,1,3,3-tetrabutyldistannoxane as catalyst. To determine the optimum conditions, the effect of catalyst concentration, bulk vs. solution polymerization, reaction time, temperature, and stoichiometry of the monomers were studied. Based on the optimum conditions, PBS with a weight-average molecular weight of 2.35,×,104 was obtained in a short time of 20 min. Synthesis of poly(butylene succinate) under microwave irradiation. [source] ChemInform Abstract: Palladium-Catalyzed Cyanation Reaction of Aryl Halides Using K4[Fe(CN)6] as Nontoxic Source of Cyanide under Microwave Irradiation.CHEMINFORM, Issue 43 2010Abdol R. Hajipour No abstract is available for this article. [source] ChemInform Abstract: A Green Approach for Efficient Synthesis of N-Substituted Pyrroles in Ionic Liquid under Microwave Irradiation.CHEMINFORM, Issue 43 2010H. M. Meshram No abstract is available for this article. [source] ChemInform Abstract: Convenient N-Formylation of Amines in Dimethylformamide with Methyl Benzoate under Microwave Irradiation.CHEMINFORM, Issue 40 2010Dongsik Yang Abstract Primary and secondary amines are formylated by DMF using methyl benzoate as catalyst. [source] ChemInform Abstract: Diversity Synthesis of N-Substituted 2-Amino-1,6-naphthyridine Derivatives under Microwave Irradiation.CHEMINFORM, Issue 24 2010Zheng-Guo Han Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Iron Trichloride Catalyzed One-Pot Synthesis of Substituted Oxazoles from Propargylic Acetates and Amides under Microwave Irradiation.CHEMINFORM, Issue 22 2010Wen-Wen Xu Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Facile and Efficient Synthesis of Quinoline-4-carboxylic Acids under Microwave Irradiation.CHEMINFORM, Issue 20 2010Hui Zhu Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Heterogeneous Phase Alkylation of Phenols Making Use of Phase Transfer Catalysis and Microwave Irradiation.CHEMINFORM, Issue 17 2010Gyoergy Keglevich Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Investigation into the Reaction of 2-Amino-4,5-dimethylthiophene-3-carboxamide with Iso(and Isothio)cyanates under Microwave Irradiation.CHEMINFORM, Issue 16 2010Abolghasem Davoodnia Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: An Efficient Method for Synthesis of Pyrano[3,2-c]pyridine Derivatives under Microwave Irradiation.CHEMINFORM, Issue 6 2010Shu-Liang Wang Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Diversity Synthesis of Pyrimido[4,5-b][1,6]naphthyridine and Its Derivatives under Microwave Irradiation.CHEMINFORM, Issue 5 2010Zheng-Guo Han Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Polymer-Assisted Solution-Phase Synthesis under Combined Ultrasound and Microwave Irradiation: Preparation of ,,,-Unsaturated Esters and Carboxylic Acids, Key Intermediates of Novel Sigma Ligands.CHEMINFORM, Issue 4 2010D. Rossi Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Practical Synthesis of 5-Substituted Tetrazoles under Microwave Irradiation.CHEMINFORM, Issue 50 2009Jaroslav Roh Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Broensted Acid-Catalyzed Nazarov Cyclization of Pyrrole Derivatives Accelerated by Microwave Irradiation.CHEMINFORM, Issue 48 2009Prabhakar Bachu Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Multi-Component Reactions of Formyl-4-aryloxymethylcoumarins under Microwave Irradiation.CHEMINFORM, Issue 47 2009K. Shivashankar Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Facile and Efficient Synthesis of 1,3,4-Oxadiazolyl 1,8-Naphthyridines under Microwave Irradiation.CHEMINFORM, Issue 42 2009K. Mogilaiah Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Catalyst-Free and Solvent-Free Method for the Synthesis of Quinoxalines under Microwave Irradiation.CHEMINFORM, Issue 42 2009Jian Feng Zhou Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Facile One-Pot, Multicomponent Synthesis of Pyridines under Microwave Irradiation.CHEMINFORM, Issue 38 2009Jian-Feng Zhou Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Highly Stereoselective Synthesis of (Z,E)-1-Halo-1,3-dienol Esters via Rearrangement of Fischer Chromium Chlorocarbenes Using Microwave Irradiation.CHEMINFORM, Issue 37 2009Dhurke Kashinath Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Synthesis of 2-Alkyl-Substituted Chromone Derivatives Using Microwave Irradiation.CHEMINFORM, Issue 33 2009Maria Friden-Saxin Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Catalyst-Free Synthesis of ,,,-Bis(4-hydroxycoumarin-3-yl)toluene in Aqueous Media under Microwave Irradiation.CHEMINFORM, Issue 26 2009Gui-Xia Gong Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: A Convenient One-Pot Synthesis of Series of 3-(2,6-Diphenyl-4-pyridyl)hydroquinolin-2-one under Microwave Irradiation and Their Antimicrobial Activities.CHEMINFORM, Issue 24 2009Niraj K. Ladani Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Unique Versatility of Ionic Liquids as Clean Decarboxylation Catalyst Cum Solvent: A Metal- and Quinoline-Free Paradigm Towards Synthesis of Indoles, Styrenes, Stilbenes and Arene Derivatives under Microwave Irradiation in Aqueous Conditions.CHEMINFORM, Issue 19 2009Abhishek Sharma Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: BiCl3 -Mediated Synthesis of 4-Chloro-5,6-dihydro-2H-pyran Derivatives Using Microwave Irradiation.CHEMINFORM, Issue 10 2009A. Thirupathaiah Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Sulfamic Acid: An Efficient, Cost-Effective, and Reusable Solid Acid Catalyst for the Synthesis of 1,8-Naphthyridines under Solvent-Free Heating and Microwave Irradiation.CHEMINFORM, Issue 6 2009Y. Thirupathi Reddy Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] | |||||||||||||||||||||||||||||||||||||