One-pot solvent-free synthesis of 2, 3- disubstituted 4(3H)- quinazolinones catalyzed by long-chain double SO3H-functionalized Brønsted acidic ionic liquids under microwave irradiation

2014 ◽  
Vol 12 (5) ◽  
pp. 897-901 ◽  
Author(s):  
Xinzhong Li ◽  
Qi Lin ◽  
Lefu Wang
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Solvent Free ◽  
One Pot ◽  
Acidic Ionic Liquids ◽  
Solvent Free Synthesis ◽  
Long Chain

scholarly journals Long-chain Brønsted Acidic Ionic Liquids Catalyzed one-pot three-component Biginelli Reaction under Solvent-Free Conditions

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Leqin He
Keyword(s):  
Ionic Liquids ◽  
Biginelli Reaction ◽  
Aromatic Aldehydes ◽  
Catalytic Performance ◽  
Solvent Free ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Acidic Ionic Liquids ◽  
Halogen Free ◽  
Long Chain

A series of halogen-free quaternary ammonium Brønsted acidic ionic liquids (ILs) were prepared and used for Biginelli reaction among aromatic aldehydes, urea or thiourea and β-dicarbonyl compounds. The influencing factors, such as the type and amount of catalyst, solvent, reaction time and reaction temperature, were investigated. The results demonstrated that the 3-(N,N-dimethylhexadecylammonium) propanesulfonic acid toluene sulfate ([DHPA][Tos]) provide the best catalytic activity, with good catalytic performance and reusability under solvent-free conditions. A possible mechanism that accounted for the [DHPA][Tos]-catalyzed reaction was proposed.

scholarly journals Solvent-free Synthesis of Nitriles from Aldehydes Catalyzed by KF/Al2O3, Montmorillonite KSF and K10

2006 ◽  
Vol 3 (3) ◽  
pp. 164-168
Author(s):  
Li-Jun Li ◽  
Ying-Xia Song ◽  
Yan-Su Gao ◽  
Yan-Feng Li ◽  
Jian-Feng Zhang
Keyword(s):  
Microwave Irradiation ◽  
Solvent Free ◽  
One Pot ◽  
Effective Catalyst ◽  
Multistep Procedure ◽  
Solvent Free Synthesis

Multistep and one-pot conversion of aldehydes to nitriles were carried out conveniently with out solvent using KF/Al2O3, montmorillonite KSF and K10 as catalyst, under microwave irradiation. The reactions are completed within 6-8 min to give satisfactory yields. KF/Al2O3was more effective catalyst both in multistep procedure and one-pot reaction.

A One-Pot, Three-Component, Solvent-Free Synthesis of Novel 6H-Chromeno[3’,4’:5,6]Pyrido[2,3-d]Pyrimidine-Triones under Microwave Irradiation

2018 ◽  
Vol 42 (12) ◽  
pp. 604-607
Author(s):  
Loghman Firoozpour ◽  
Hoda Yahyavi ◽  
Ramona Ejtemaei ◽  
Setareh Moghimi ◽  
Alireza Foroumadi
Keyword(s):  
Microwave Irradiation ◽  
Efficient Method ◽  
Barbituric Acid ◽  
Reaction Times ◽  
Solvent Free ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Substituted Benzaldehydes ◽  
High Yields ◽  
Solvent Free Synthesis

A green and efficient method for preparing novel heterocyclic systems is established through the reaction of differently substituted benzaldehydes, barbituric acid and 4-amino-2H-chromene-2-one under solvent-free conditions. This method affords 6H-chromeno[3’,4’:5,6] pyrido[2,3-d]pyrimidine-trione derivatives in high yields and short reaction times.

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