Z. Karimi-Jaberi, Baharak Pooladian, M. Moradi
Nov 1, 2012
Citations
0
Influential Citations
35
Citations
Journal
Chinese Journal of Catalysis
Abstract
Abstract 1,3,5-Tris(hydrogensulfato) benzene (THSB) was easily prepared by the reaction between phloroglucinol and chlorosulfonic acid in dichloromethane at room temperature. This compound was then used as an efficient catalyst for the synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ols) through the condensation reactions of 1-phenyl-3-methylpyrazol-5-one with several different aromatic aldehydes in ethanol at 75 °C. The present methodology offers several advantages over existing methodologies, such as excellent yields, simple procedure, easy work-up and ecofriendly reaction conditions.