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.- Full Text:
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- DOI:10.5539/ijc.v4n3p52
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