نتایج جستجو برای: microwave synthesis

تعداد نتایج: 455524  

Journal: :journal of particle science & technology 2015
mehrdad manteghain faeze tari behrooz bozorgi

this paper focused on a simple approach for synthesis of molybdenum oxide (moo3) nanoparticles and reports a facile route for synthesis of such nanoparticles, using microwave irradiation as a homogenous and powerful source of heating, using ethylene glycol as the solvent and heating medium. for more investigations, besides microwave heating, the obtained solutions were also treated by conventio...

2003
Bhupinder Singh Sekhon

Microwave-assisted organic synthesis is an enabling technology for accelerating drug discovery and development processes. Microwave instruments are used principally in three areas of drug research: the screening of organic drug formulae, peptide synthesis, and DNA amplification. The features of microwave-assisted organic synthesis technology include reduction of time for a chemical reaction, in...

E. Shaker, M. Bafghi, M. Jalaly, M. Sakaki,

B4C–Al2O3 composite powder was produced by aluminothermic reduction in Al/B2O3/C system. In this research, microwave heating technique was used to synthesize desired composite. The ball milling of powder mixtures was performed in order to study the effect of mechanical activation on the synthesis process. The synthesis mechanism in this system was investigated by examining the correspondi...

An efficient tandem synthesis of alkyl aryl ethers, including valuable building blocks of dialdehyde and dinitro groups under microwave irradiation and solvent free conditions on potassium carbonate as a mild solid base has been developed. A series of alkyl aryl ethers were obtained from alcohols in excellent yields by following the Williamson ether synthesis protocol under practical mild condi...

2014
Phatcharee Phoempoon Lek Sikong

The microwave assisted synthesis nowadays attracts a great deal of attention. Monoclinic phase VO2 (M) was prepared from NH4VO3 and H2C2O4 · 2H2O by a rapid microwave assisted technique. The synthesis parameters, microwave irradiation time, microwave power, and calcinations temperature were systematically varied and their influences on the structure and morphology were evaluated. The microwave ...

Journal: :journal of nanostructures 2014
m. shakiba nahad g. mohammadi ziarani a. badiei a. banan

sulfonic acid functionalized sba-15 as a nanoporous acid catalyst was used in the synthesis of 2-aryl benzoxazoles 4 by the condensation of 2-aminophenol 1 and benzoyl chlorides 2 under microwave irradiation in solvent free reaction conditions. the advantages of this methodology are good product yields (60-98%), being environmentally benign, short reaction times and easy work up.

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
mohammad ali zolfigol ardeshir khazaei ahmad reza moosavi-zare abdolkarim zare ali reza hasanijejad

a new efficient method for the synthesis of carboacyclic nucleosides as biologically interesting compounds via aza-conjugate addition of pyrimidine nucleobases to a,β-unsaturated esters in the presence of catalytic amount of lioh.h2o (1.2-4.8 mol%) under microwave irradiation is described. this method affords the title compounds in good to excellent yields and in short reaction times.

2012
Rina Das Dinesh Mehta Harsh Bhardawaj

Microwave-assisted organic synthesis is an enabling technology for accelerating drug discovery and development processes. Microwave organic synthesis opens up new opportunities to the synthetic chemist in the form of new reaction that are not possible by conventional heating and serve a flexible platform for chemical reaction. This review focuses on the advances in the developing of innovative ...

Journal: :Journal of combinatorial chemistry 2010
Ya-Shan Hsiao Gorakh S Yellol Li-Hsun Chen Chung-Ming Sun

A new multidisciplinary synthetic approach comprising polymer-support synthesis, microwave-assisted synthesis, and multicomponent condensation facilitates synthesis of triaza-fluorenes library with a set of advantages such as rapid process, simple purification, and structural diversity in one shot. Microwave-assisted multistep synthetic protocol was used to construct the benzimidazole ring on s...

Journal: :Nanoscale 2011
Ming-Qiang Zhu Gan-Chao Chen Yun-Mei Li Jun-Bing Fan Ming-Feng Zhu Zhiyong Tang

One-step facile synthesis of monoporous polymer microspheres via microwave-controlled dispersion polymerization is introduced. This template-free method employing the dispersion polymerization of styrene under microwave irradiation induces directly the formation of uniform monoporous polymer microspheres, with controllable morphologies and sizes, which can be tuned by simply adjusting parameter...

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