نتایج جستجو برای: microwave synthesis

تعداد نتایج: 455524  

2012
Kadir Ozden Yerdelen

In this study, solvent-free and phase transfer catalysis conditions coupled with microwave irradiation and their advantages in synthesis of N-alkylation of primary anilines were reported. In this way two different microwave processing techniques were compared in terms of reaction yields. Consequently, microwave irradiation significantly reduced reaction times compared to traditional heating met...

Journal: :Molecules 2011
Nailton M Nascimento-Júnior Arthur E Kümmerle Eliezer J Barreiro Carlos A M Fraga

This review aims to highlight microwave-assisted organic synthesis as applied to medicinal chemistry in the last years, showing some reactions performed under microwave irradiation for the synthesis of distinct structurally molecules of biological interest, divided into the following groups: antineoplastics, anti-inflammatory, antimicrobial agents, antivirals, agents for the treatment of neglec...

2015
Jonathan Wooten VALENTINE WOOTEN Peng George Wang Jonathan Valentine Wooten Maged Henary Gangli Wang Yunpeng Liu Kristina Gardner Zaikuan Yu

Glycoscience is an emerging field of science that focuses on the study of the structure, biosynthesis, biology, and evolution of saccharides (sugars). It covers a broad range of subjects including microwave-assisted synthesis as well as sphingolipid synthesis. In this field, knowledge is limited due to the complexity of carbohydrates and their derivatives. Therefore, it is all the more importan...

   The use of plant extract in the biosynthesis of nanoparticles (NPs) can be an eco-friendly approach and have been suggested as a possible alternative to classic methods namely physical and chemical procedures. This study was designed to examine the structural chemistry of silver nanoparticles (AgNPs) using both conventional heating and microwave irradiation methods.To o...

Hassan Karbasizadeh Javad Safari, Sayed Hossein Banitaba

A series of Nـ alkyl 2ـ ketomethylquinoline derivatives were synthesis by reaction of benzoyl chloride derivatives with Nـ methyl quinaldine iodide in the presence of triethyl amine under microwave irradiation. Enaminone form of the product study by spectroscopy method. The result revealed the  Nـ alkyl 2ـ ketomethylquinoline the fixed enaminone tautomer.

Hassan Karbasizadeh Javad Safari, Sayed Hossein Banitaba

A series of Nـ alkyl 2ـ ketomethylquinoline derivatives were synthesis by reaction of benzoyl chloride derivatives with Nـ methyl quinaldine iodide in the presence of triethyl amine under microwave irradiation. Enaminone form of the product study by spectroscopy method. The result revealed the  Nـ alkyl 2ـ ketomethylquinoline the fixed enaminone tautomer.

Farzad Nikpour Hassan Hazarkhani Mohammad Gl Dakamin Mohammad S. Khajavi Mostafa Hajihadi

A phosgene-free synthesis of symmetrical N,N'-disubstituted urea by the reaction of aromatic and aliphatic primary amines and urea promoted by  microwave irradiation in the presence of a suitable energy-transfer solvent such as N-N-dimethylacetamide is described.

A new and improved protocol for the synthesis, in good to excellent yields, of acridine-1,8(2H,5H)-diones is described, involving a one-pot, three component reaction of dimedone, arylglyoxals, and ammonium acetate in water under microwave irradiation.  

Journal: :iranian journal of science and technology (sciences) 2015
a. saberi

as benzimidazole ring is an important pharmacophore in modern drug discovery and benzimidazoles are very important intermediates in organic reactions, the preparation of benzimidazoles has gained considerable attention in recent years. here, a comparative study on the synthesis of benzimidazoles from aromatic, aliphatic and heterocyclic carboxylic acid, benzonitrile and o-phenylenediamine under...

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