Microwave-assisted palladium mediated efficient synthesis of pyrazolo[3,4-b]pyridines, pyrazolo[3,4-b]quinolines, pyrazolo[1,5-a]pyrimidines and pyrazolo[1,5-a]quinazolines

RSC Advances ◽  
2014 ◽  
Vol 4 (46) ◽  
pp. 24001-24006 ◽  
Author(s):  
Kommuri Shekarrao ◽  
Partha Pratim Kaishap ◽  
Venkateshwarlu Saddanapu ◽  
Anthony Addlagatta ◽  
Sanjib Gogoi ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Efficient Method ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
Aryl Aldehydes ◽  
Microwave Assisted ◽  
Fused Heterocycles ◽  
Palladium Catalyzed ◽  
Solvent Free Reaction

An efficient method was developed for the synthesis of pyrazole fused heterocycles via the palladium-catalyzed solvent free reaction of β-halovinyl/aryl aldehydes and 3-aminopyrazoles/5-aminopyrazoles under microwave irradiation in good yields.

The Synthesis of α-Hydroxyphosphonates Mediated by Microwave Irradiation under Solvent-Free Conditions

2002 ◽  
Vol 2002 (6) ◽  
pp. 291-292 ◽  
Author(s):  
Babak Kaboudin ◽  
Rahman Nazari
Keyword(s):  
Microwave Irradiation ◽  
Efficient Method ◽  
Solvent Free ◽  
Microwave Assisted ◽  
Solvent Free Conditions

Microwave-assisted hydrophosphonylation of aldehydes under solvent-free conditions was found to be an efficient method for the preparation of α-hydroxyphosphonates; the method was reliable, efficient and high yielding.

A Simple and Efficient Synthesis of fused Benzo[b]thiophene Derivatives

Synthesis ◽  
2021 ◽  
Author(s):  
Alexander S. Fisyuk ◽  
Sergey A. Chernenko ◽  
Anastasia S. Kostyuchenko ◽  
Anna Samsonenko ◽  
Anton L. Shatsauskas ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Efficient Method ◽  
Oxidative Coupling ◽  
Pyridine Ring ◽  
Efficient Synthesis ◽  
New Approach ◽  
Fused Heterocycles ◽  
Palladium Catalyzed ◽  
Thiophene Derivatives

A new approach to the synthesis of fused benzothiophene derivatives was developed based on iodine-promoted photo-cyclization of 4,5-diarylsubstituted thiophenes obtained in three steps from commercially available compounds. Comparative analysis showed that photochemical cyclization is a more efficient method for the preparation of fused benzo[b]thiophene derivatives, compared to oxidative coupling 4,5-diarylsubstituted thiophenes in the presence of iron (III) chloride and palladium catalyzed intramolecular arylation. This approach provides an efficient synthesis of functionally substituted naphtho[2,1-b: 3,4-b ']dithiophenes, phenanthro[9,10-b] thiophenes, benzo[1,2-b: 3,4-b': 6 , 5-b '']trithiophenes, as well as new fused heterocycles containing a pyridine ring and / or a carbazole moiety

scholarly journals Microwave Assisted Solvent Free Synthesis of Azomethines from Aryl Aldehydes on Melamin Formaldehyde as Solid Support

2011 ◽  
Vol 8 (3) ◽  
pp. 1142-1145 ◽  
Author(s):  
Ramin Rezaei ◽  
Mohammad K. Mohammadi ◽  
Tahereh Ranjbar
Keyword(s):  
Microwave Irradiation ◽  
Hydroxylamine Hydrochloride ◽  
Solid Support ◽  
Solvent Free ◽  
Melamine Formaldehyde ◽  
One Pot ◽  
Aryl Aldehydes ◽  
Microwave Assisted ◽  
High Yields ◽  
Solvent Free Synthesis

Various aryl aldehydes underwent prompt one pot conversion into the corresponding azomethines in high yields by reacting with hydroxylamine hydrochloride supported on melamine formaldehyde under microwave irradiation.

ChemInform Abstract: An Efficient Method for the Preparation of New Analogues of Leucettamine B under Solvent-Free Microwave Irradiation.

ChemInform ◽  
2009 ◽  
Vol 40 (39) ◽  
Author(s):  
Mansour Debdab ◽  
Steven Renault ◽  
Samar Eid ◽  
Olivier Lozach ◽  
Laurent Meijer ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Efficient Method ◽  
Solvent Free

Microwave-assisted synthesis of quinolones and 4H-1,4-benzo thiazine 1,1-dioxides

2005 ◽  
Vol 2005 (1) ◽  
pp. 27-28 ◽  
Author(s):  
Jaime Charris ◽  
Arthur Barazarte ◽  
José Domínguez ◽  
Neira Gamboa
Keyword(s):  
Microwave Irradiation ◽  
Rapid Method ◽  
Solvent Free ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Solvent Free Conditions

A rapid method for the preparation of N-aryl-2-methylthio-4-oxo-1,4-dihydro quinoline-3-carbonitriles (2a–e) and N-aryl-3-methylthio-4H-1,4-benzothiazine-2-carbonitrile 1,1-dioxides (2f–o) is reported. The cyclization is accelerated by microwave irradiation under solvent free conditions in the presence of K2CO3.

Solvent-Free Microwave-Assisted Efficient Synthesis of 4,4-Disubstituted 2-Oxazolines

2003 ◽  
Vol 2003 (22) ◽  
pp. 4387-4391 ◽  
Author(s):  
Fernando García-Tellado ◽  
André Loupy ◽  
Alain Petit ◽  
Alma Leilani Marrero-Terrero
Keyword(s):  
Solvent Free ◽  
Efficient Synthesis ◽  
Microwave Assisted
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