Graphene oxide–chitosan bionanocomposite: a highly efficient nanocatalyst for the one-pot three-component synthesis of trisubstituted imidazoles under solvent-free conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (42) ◽  
pp. 33177-33184 ◽  
Author(s):  
Ali Maleki ◽  
Reza Paydar
Keyword(s):  
Graphene Oxide ◽  
Solvent Free ◽  
Organic Reaction ◽  
One Pot ◽  
Heterogeneous Nanocatalyst ◽  
Highly Efficient ◽  
Solvent Free Conditions ◽  
The One

An eco-friendly and clean GO–biopolymer heterogeneous nanocatalyst was prepared and characterized, which efficiently promoted an important organic reaction.

A highly efficient and green approach for the synthesis of pyrimido[4,5-b]quinolines using N,N-diethyl-N-sulfoethanaminium chloride

2021 ◽  
Vol 76 (2) ◽  
pp. 85-90
Author(s):  
Abdolkarim Zare ◽  
Manije Dianat
Keyword(s):  
Reaction Times ◽  
Solvent Free ◽  
One Pot ◽  
Catalyst Amount ◽  
Green Protocol ◽  
Highly Efficient ◽  
Green Approach ◽  
Solvent Free Conditions ◽  
The One ◽  
High Yields

Abstract A highly efficient and green protocol for the synthesis of pyrimido[4,5-b]quinolines has been described. The one-pot multicomponent reaction of dimedone with arylaldehydes and 6-amino-1,3-dimethyluracil in the presence of N,N-diethyl-N-sulfoethanaminium chloride ([Et3N–SO3H][Cl]) as an ionic liquid (IL) catalyst under solvent-free conditions afforded the mentioned compounds in high yields and short reaction times. Our protocol is superior to many of the reported protocols in terms of two or more of these factors: the reaction times, yields, conditions (solvent-free versus usage of organic solvents), temperature and catalyst amount.

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