Citation:
	            
		            Hossein  Naeimi, Hossein  Foroughi. Efficient, environmentally benign, one-pot procedure for the synthesis of 1, 5-benzodiazepine derivatives using N-methyl-2-pyrrolidonium hydrogen sulphate as an ionic liquid catalyst under solvent-free conditions[J]. Chinese Journal of Catalysis,
							;2015, 36(5): 734-741.
						
							doi:
								10.1016/S1872-2067(14)60304-1
						
					
				
					
				
	        
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	                	A powerful and environmentally benign method has been developed for the one-pot synthesis of 4-substituted-1,5-benzodiazepines via the three-component reaction of a series of aldehydes with dimedone and o-phenylenediamine using [H-NMP][HSO4] as a Brönsted acidic ionic liquid catalyst under solvent-free conditions. The key benefits of this new method over existing techniques include high yields, the use of a green catalyst, short reaction times and facile catalyst separation.
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								Keywords:
								
 - Ionic liquid,
 - Benzodiazepine,
 - Solvent-free conditions,
 - Dimedone
 
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