Synthesis of 4,4’-(Arylmethylene)bis(1H-pyrazol-5-ols) Using Silica-bonded Ionic Liquid as Recyclable Catalyst


  •  Mojtaba Baghernejad    
  •  Khodabakhsh Niknam    

Abstract

N-(3-Silicapropyl)-N-methyl imidazolium hydrogen sulfate ([Sipmim]HSO4) is prepared and employed as a recyclable catalyst for the synthesis of 4,4’-(arylmethylene)bis(1H-pyrazol-5-ols) from aromatic aldehydes with 3-methyl-l-phenyl-5-pyrazolone in refluxing ethanol. [Sipmim]HSO4 could be recycled for several times without any additional treatment.


This work is licensed under a Creative Commons Attribution 4.0 License.
  • ISSN(Print): 1916-9698
  • ISSN(Online): 1916-9701
  • Started: 2009
  • Frequency: semiannual

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