نتایج جستجو برای: microwave promoted synthesis

تعداد نتایج: 503987  

Journal: :European Journal of Organic Chemistry 2021

Ammonium chloride promotes the selective formation of monosubstituted ureas under microwave irradiation. Most nucleophiles, acid-labile functionalities, and protecting groups are well tolerated in this reaction. By avoiding transition metals mineral acids, methodology offers a more sustainable alternative for synthesis their analogs.

2012
Jolly Jacob

Revolution in organic compound synthesis has been promoted by microwave assisted organic syntheses (MAOS) by which small molecules are built up into large polymers in a fraction of time. The need for different organic compound libraries for drug discovery, biomaterial development, automated library screening; proteomics etc has supported the emergence of innovative technologies for rapid combin...

Kourosh Rad Moghadam Mohammad Sadegh Khajavi Parichehr Afshani

The first highly accelerated Niementowski reaction of anhranilic acid with some amides or ketones under microwave irradiation leading to quinazolinones and quinoline derivatives is described. These reactions represent some examples of efficient microwave irradiation promoted organic condensation in which the reactions can be carried out in open vessels and provides products of high purity w...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2006
John W Doolittle Prabir K Dutta

The water core of reverse micelles has been extensively used as the site for synthesis of a variety of materials. However, water-in-oil reverse micelles have a limited range of temperatures over which they are stable as a single phase. Directing heat to the water cores, the usual site of synthesis without heating the bulk provides added opportunities for synthesis. Microwave radiation is a meth...

Journal: :Chemical communications 2014
Thibaut Alzieu Johannes Lehmann Ajay B Naidu Rainer E Martin Robert Britton

We report the optimization of a neglected reaction for the rapid and direct conversion of oxazoles into N-substituted imidazoles. The utility of this microwave-promoted reaction for diversity-oriented synthesis is demonstrated in the preparation of >40 N-substituted imidazoles, including α-imidazolyl esters.

Journal: :Organic letters 2012
Biao Jiang Jue Wang Zuo-gang Huang

A stereocontrolled strategy toward the synthesis of nagelamide K has been developed. The dimeric imidazole acrylate, diimidazolidenesuccinate, was constructed as a synthetic precursor by a Ni-catalyzed coupling reaction; the microwave-promoted intramolecular aza-Michael addition afforded the imidazo[1,5-a]pyridine core structure of nagelamide K in high stereoselectivity. A detaurine-dediamino a...

Journal: :Organic & biomolecular chemistry 2014
Monica Dell'Acqua Valentina Pirovano Giorgio Confalonieri Antonio Arcadi Elisabetta Rossi Giorgio Abbiati

An easy entry to uncommon 2-propargylbenzaldehydes was developed. 2-Propargylbenzaldehydes demonstrated to be suitable building blocks for the synthesis of 3-benzyl isoquinolines by microwave promoted domino imination/cycloisomerisation in the presence of ammonium acetate. A small library of 3-benzyl isoquinolines was obtained in good yields under mild reaction conditions. Two alternative plaus...

2014
Anupma Kumari

A microwave-promoted new easy, efficient, clean and environmentally benign method for the synthesis of 1,7naphthyridineand its derivatives from 2-cyano-3-pyridylacetonitrile has been developed. The desired products were isolated in excellent yields and high purity under eco-friendly conditions.The synthesized compounds were characterized by the IR, UV-Visible and H NMR spectral analyses along w...

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