Title of article
Silica-bonded S-sulfonic acid: an efficient and recyclable solid acid catalyst for the synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ols)
Author/Authors
Niknam، نويسنده , , Khodabakhsh and Saberi، نويسنده , , Dariush and Sadegheyan، نويسنده , , Mohsen and Deris، نويسنده , , Abdollah، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2010
Pages
3
From page
692
To page
694
Abstract
Silica-bonded S-sulfonic acid (SBSSA) is employed as a recyclable catalyst for the condensation reaction of aromatic aldehydes with 3-methyl-l-phenyl-5-pyrazolone. This condensation reaction was performed in ethanol under refluxing conditions giving 4,4′-alkylmethylene-bis(3-methyl-5-pyrazolones) in 75–90% yields.
Keywords
Silica-bonded S-sulfonic acid , Aldehydes , 4?-(Arylmethylene)bis(1H-5-pyrazol-5-ols) , 4 , 5-Methyl-2-phenyl-2 , 4-dihydro-3H-pyrazol-3-one
Journal title
Tetrahedron Letters
Serial Year
2010
Journal title
Tetrahedron Letters
Record number
1870903
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