Paper Information

Journal:   JOURNAL OF APPLIED CHEMISTRY   2017 , Volume 11 , Number 41; Page(s) 31 To 37.
 
Paper:  A RAPID, EASY, AND EFFICIENT METHOD FOR SYNTHESIS OF 4,4'-(ARYLMETHYLENE)-BIS-(1H-PYRAZOL-5-OLS), CATALYZED BY BOEHMITE NANOPARTICLES
 
Author(s):  BAKHERAD MOHAMMAD*, KEIVANLOO ALI, AMIN AMIR HOSEIN, DOOSTI RAHELE, AGHAYAN ZAHRA
 
* SCHOOL OF CHEMISTRY, SHAHROOD UNIVERSITY OF TECHNOLOGY, 36199-95161, SHAHROOD, IRAN
 
Abstract: 

An efficient and eco-friendly method is introduced for the synthesis of 4,4'-(arylmethylene)-bis-(1H-pyrazol-5-ols) by the condensation reaction of two equivalents of 5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one with various aromatic aldehydes, catalyzed by the boehmite nanoparticles (BNPs). This heterogeneous catalyst was recycled and used in four runs for the reaction between benzaldehyde and 3-methyl-l-phenyl-5-pyrazolone without any loss of its catalytic activity.

 
Keyword(s): HETEROGENEOUS CATALYST, ALDEHYDE, ONE-POT REACTION, 3-METHYL-L-PHENYL-5-PYRAZOLONE