Design, characterization and application of new ionic liquid 1-sulfopyridinium chloride as an efficient catalyst for tandem Knoevenagel–Michael reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with aldehydes, By Alireza Hasaninejad

Research

Title	Design, characterization and application of new ionic liquid 1-sulfopyridinium chloride as an efficient catalyst for tandem Knoevenagel–Michael reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with aldehydes
Type	Article
Keywords	1-Sulfopyridinium chloride {[Pyridine–SO3H]Cl}; 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one; Aldehyde; 4,4-(Arylmethylene)-bis(3-methyl-1-phenyl-1H-pyrazol-5-ol); Ionic liquid
Journal	APPLIED CATALYSIS A-GENERAL
DOI	10.1016/j.apcata.2013.07.004
Researchers	Ahmad Reza Moosavi-Zare (First researcher) , Mohammad Ali Zolfigol (Second researcher) , Mahmoud Zarei (Third researcher) , Abdolkarim Zare (Fourth researcher) , Vahid Khakyzadeh (Fifth researcher) , Alireza Hasaninejad (Not in first six researchers)

Abstract

In this work, novel ionic liquid 1-sulfopyridinium chloride {[Pyridine–SO3H]Cl} is synthesized, and characterized by IR, 1H and 13C NMR, UV as well as mass spectra. The ionic liquid is used as an efficient, homogeneous and reusable catalyst for the synthesis of 4,4-(arylmethylene)-bis(3-methyl-1-phenyl-1Hpyrazol-5-ol)s by tandem Knoevenagel–Michael reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with various aromatic and hetero-aromatic aldehydes under mild reaction conditions.