Rapid and Efficient Synthesis of 4-Substituted Pyrazol-5-one under Microwave Irradiation in Solvent-Free Conditions

2007 ◽  
Vol 340 (11) ◽  
pp. 591-598 ◽  
Author(s):  
Magdy A.-H. Zahran ◽  
Farag A-A. El-Essawy ◽  
Salah M. Yassin ◽  
Tarek A-R. Salem ◽  
Nader M. Boshta
Keyword(s):  
Microwave Irradiation ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
Solvent Free Conditions

1,3-Dibromo-5,5-dimethylhydantoin as a useful reagent for efficient synthesis of 3,4-dihydropyrimidin-2-(1H)-ones under solvent-free conditions

2009 ◽  
Vol 63 (1) ◽  
Author(s):  
Mohammad Abdollahi-Alibeik ◽  
Zahra Zaghaghi
Keyword(s):  
Microwave Irradiation ◽  
Ethyl Acetoacetate ◽  
Biginelli Reaction ◽  
Reaction Times ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
One Pot ◽  
Aliphatic Aldehydes ◽  
Solvent Free Conditions ◽  
High Yields

AbstractEfficient syntheses of 3,4-dihydropyrimidin-2-(1H)-ones and the corresponding thioxo derivatives using 1,3-dibromo-5,5-dimethylhydantoin (DBH) catalysis of a one-pot three-component Biginelli reaction of aldehydes, ethyl acetoacetate, and urea or thiourea under microwave irradiation are described. The advantages of this method are its short reaction times, high yields of the products, inexpensive and commercially available catalyst, and solvent-free conditions. Typical isolated yields exceed 70 % for arylaldehydes (9 examples) and aliphatic aldehydes (2 examples).

Efficient solvent-free synthesis of bis(indolyl)methanes on SiO2 solid support under microwave irradiation

2015 ◽  
Vol 69 (3) ◽  
Author(s):  
Da-Wei Zhang ◽  
Yu-Min Zhang ◽  
Yi-Liang Zhang ◽  
Tian-Qi Zhao ◽  
Hong-Wei Liu ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Aromatic Aldehydes ◽  
Solid Support ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
Solvent Free Conditions ◽  
Solvent Free Synthesis

AbstractAn efficient synthesis of bis(indolyl)methanes was developed. Bis(indolyl)methanes were synthesized starting from various aromatic aldehydes with indole under microwave irradiation and solvent-free conditions (85-98 %). Solid support SiO

ChemInform Abstract: Rapid and Efficient Synthesis of 4-Substituted Pyrazol-5-one under Microwave Irradiation in Solvent-Free Conditions.

ChemInform ◽  
2008 ◽  
Vol 39 (10) ◽  
Author(s):  
Magdy A.-H. Zahran ◽  
Farag A.-A. El-Essawy ◽  
Salah M. Yassin ◽  
Tarek A.-R. Salem ◽  
Nader M. Boshta
Keyword(s):  
Microwave Irradiation ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
Solvent Free Conditions
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