1,3,5-Tris(hydrogensulfato) Benzene: A New and Efficient Catalyst for Synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ol) Derivatives

被引：43
|
作者：
Karimi-Jaberi, Zahed [1 ]
Pooladian, Baharak [1 ]
Moradi, Masoud [1 ]
Ghasemi, Ehsan [1 ]
机构：
[1] Islamic Azad Univ, Firoozabad Branch, Dept Chem, Firoozabad, Fars, Iran
来源：
CHINESE JOURNAL OF CATALYSIS | 2012年 / 33卷 / 12期
关键词：
1,3,5-tris(hydrogensulfato) benzene; aromatic aldehydes; 1-phenyl-3-methylpyrazol-5-one; 4,4 '-(arylmethylene)bis(1H-pyrazol-5-ols); ethanol; multicomponent reaction; SOLID ACID CATALYST; SOLVENT-FREE CONDITIONS; SULFURIC-ACID; HETEROGENEOUS CATALYST; TRICHLOROACETIC-ACID; METAL-COMPLEXES; RAPID SYNTHESIS; AQUEOUS-MEDIA; PYRAZOLONES;
D O I：
10.1016/S1872-2067(11)60477-4
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
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 degrees C. The present methodology offers several advantages over existing methodologies, such as excellent yields, simple procedure, easy work-up and ecofriendly reaction conditions.
引用
收藏
页码：1945 / 1949
页数：5
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