Efficient Access to Imidazo[1,2-a]pyridines/pyrazines/pyrimidines via Catalyst-Free Annulation Reaction under Microwave Irradiation in Green Solvent

2018 ◽  
Vol 20 (3) ◽  
pp. 164-171 ◽  
Author(s):  
R. Nishanth Rao ◽  
Balamurali MM ◽  
Barnali Maiti ◽  
Ranjit Thakuria ◽  
Kaushik Chanda
Keyword(s):  
Microwave Irradiation ◽  
Green Solvent ◽  
Catalyst Free ◽  
Efficient Access

ChemInform Abstract: An Efficient Synthesis of Quinoxalines under Catalyst-Free and Microwave-Irradiation Conditions.

ChemInform ◽  
2009 ◽  
Vol 40 (17) ◽  
Author(s):  
Jian-Feng Zhou ◽  
Gui-Xia Gong ◽  
Li-Tao An ◽  
Yu Liu ◽  
Feng-Xia Zhu ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Efficient Synthesis ◽  
Catalyst Free

scholarly journals On water catalyst-free synthesis of benzo[d]imidazo[2,1-b] thiazoles and novel N-alkylated 2-aminobenzo[d]oxazoles under microwave irradiation

RSC Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 770-778 ◽  
Author(s):  
Narasimharao Mukku ◽  
Barnali Maiti
Keyword(s):  
Microwave Irradiation ◽  
Microwave Assisted ◽  
Catalyst Free ◽  
Highly Efficient

A highly efficient unprecedented catalyst-free microwave-assisted procedure for synthesizing benzo[d]imidazo[2,1-b]thiazoles and N-alkylated 2-aminobenzo[d]oxazol in green media was developed.

scholarly journals Microwave Assisted Three Component Reaction Conditions to Obtain New Thiazolidinones with Different Heterocyclic Skeletons

Proceedings ◽  
2019 ◽  
Vol 41 (1) ◽  
pp. 38
Author(s):  
Fernando J. Lorenzo ◽  
Romina A. Ocampo ◽  
Sandra D. Mandolesi
Keyword(s):  
Microwave Irradiation ◽  
Thioglycolic Acid ◽  
Aldehyde Group ◽  
Green Solvent ◽  
Reaction Products ◽  
Reaction Conditions ◽  
One Pot ◽  
Microwave Assisted ◽  
Three Component Reaction ◽  
The One

We present here a new proposal for the “one pot” generation of new 4-thiazolidinones (9a–e) through a multicomponent reaction under microwave irradiation conditions, using aromatic and heteroaromatic amines (8a–e), absolute ethanol as a “green” solvent and modifying the aldehyde group in the glycosidic residue, synthesized from D-mannitol. The study is focused in the variation of the irradiation times and the concentration of thioglycolic acid in order to study the possibility of controlling the structure and/or stereochemistry of the products formed in the reaction. Thiazolidinones 9a–d were obtained with a 69–82% The generation of the corresponding reaction products were monitored by TLC and CG-MS, taking reaction aliquots. The conditions reaction proved to be chemoselective depending on the excess of acid and irradiation times.

A catalyst-free protocol for the green and efficient condensation of indoles with aldehydes in ionic liquids

2009 ◽  
Vol 87 (2) ◽  
pp. 416-421 ◽  
Author(s):  
Abdolkarim Zare ◽  
Abolfath Parhami ◽  
Ahmad Reza Moosavi-Zare ◽  
Alireza Hasaninejad ◽  
Ali Khalafi-Nezhad ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Reaction Times ◽  
Aliphatic Aldehydes ◽  
Catalyst Free

Indoles are efficiently condensed with aromatic and aliphatic aldehydes in the absence of any catalyst in ionic liquid 1-butyl-3-methylimidazolium bromide {bmim]Br} under microwave irradiation to afford bis(indolyl)methanes in good to excellent yields and in short reaction times.

scholarly journals Ionic liquid 1-butyl-3-methylimidazolium bromide ([bmim]Br): A green and neutral reaction media for the efficient, catalyst-free synthesis of quinoxaline derivatives

2010 ◽  
Vol 75 (10) ◽  
pp. 1315-1324 ◽  
Author(s):  
Abdolkarim Zare ◽  
Alireza Hasaninejad ◽  
Abolfath Parhami ◽  
Ahmad Moosavi-Zare ◽  
Fatemeh Khedri ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Microwave Irradiation ◽  
Reaction Times ◽  
Efficient Catalyst ◽  
Neutral Reaction ◽  
Catalyst Free ◽  
Quinoxaline Derivatives ◽  
Reaction Media

Quinoxaline derivatives were produced in excellent yields and short reaction times via the condensation of 1,2-diamines with 1,2-diketones in the neutral ionic liquid 1-butyl-3-methylimidazolium bromide ([bmim]Br) under catalyst-free and microwave irradiation conditions.

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