One-pot three-component synthesis of dialkyl 3-(alkylamino)-1-aryl-1H-pyrazole-4,5-dicarboxylates using α-Fe2O3 nanoparticles and phenylisocyanate in solvent-free conditions

Mohammadi, Bagher; Rahmani, Maryam

Document Type : Original Research Article

Authors

Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran.

Abstract

This work described a simple and efficient synthesis of dialkyl 3-(alkylamino)-1-aryl-1H-pyrazole-4,5-dicarboxylates via a three component reaction between arylhydrazine, alkylisocyanid and dialkylacetylenedicarboxylates in the presence of phenylisocyanate and α-Fe2O3 nanoparticles. Eco friendly, solvent-free conditions, excellent yields, and short reaction times, inexpensive and readily available catalysts are the main advantages of this method. In this work, phenylisocyanate and α-Fe2O3 nanoparticles used as a potent mixed catalyst for promoting the reaction and taking it in a special way to obtain the titled compounds in good to excellent yields. This reaction was not carried out without any of the components of this mixed catalyst. It means that for performance this reaction both of the mixed catalyst components is required.

Graphical Abstract

Keywords

Main Subjects

Organic chemistry

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Iranian chemical communication

One-pot three-component synthesis of dialkyl 3-(alkylamino)-1-aryl-1H-pyrazole-4,5-dicarboxylates using α-Fe2O3 nanoparticles and phenylisocyanate in solvent-free conditions

References

References

Volume 4, Issue 2, pp. 133-235, Serial No. 11
April 2016
Pages 226-235

One-pot three-component synthesis of dialkyl 3-(alkylamino)-1-aryl-1H-pyrazole-4,5-dicarboxylates using α-Fe2O3 nanoparticles and phenylisocyanate in solvent-free conditions

References

References

Volume 4, Issue 2, pp. 133-235, Serial No. 11April 2016Pages 226-235

Volume 4, Issue 2, pp. 133-235, Serial No. 11
April 2016
Pages 226-235