Xanthan Sulfuric Acid: An Efficient, Biosupported, and Recyclable Solid Acid Catalyst for the Synthesis of 4,4′-(Arylmethylene)bis(1H-pyrazol-5-ols)

A simple and efficient method has been developed for the synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ols) by the condensation reaction between substituted aldehydes, and 1-phenyl-3-methylpyrazol-5-one in the presence of xanthan sulfuric acid (XSA) as a solid acid catalyst. This method is simpl...

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Bibliographic Details
Published inSynthetic communications Vol. 42; no. 16; pp. 2382 - 2387
Main Authors Kuarm, B. Suresh, Rajitha, B.
Format Journal Article
LanguageEnglish
Published PHILADELPHIA Taylor & Francis Group 15.08.2012
Taylor & Francis
Taylor & Francis Ltd
Subjects
1-phenyl-3-methylpyrazol-5-one
4,4′-(arylmethylene)bis(1H-pyrazol-5-ols)
Aldehydes
biosupported
Chemical industry
Chemistry
Chemistry, Organic
Physical Sciences
Science & Technology
Sulfuric acid
xanthan sulfuric acid
1-phenyl-3-methylpyrazol-5-one
4,4 '-(arylmethylene)bis(1H-pyrazol-5-ols)
SOLVENT-FREE CONDITIONS
PYRAZOLONES
DIPYRIDINE COBALT CHLORIDE
Aldehydes
CUPY2CL2
PECHMANN CONDENSATION
STATE SYNTHESIS
xanthan sulfuric acid
HETEROCYCLES
AGENTS
biosupported
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Summary:A simple and efficient method has been developed for the synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ols) by the condensation reaction between substituted aldehydes, and 1-phenyl-3-methylpyrazol-5-one in the presence of xanthan sulfuric acid (XSA) as a solid acid catalyst. This method is simple and cost-effective with short reaction times. Yields are excellent with high purity, and the catalyst could be easily recycled.
ISSN:0039-7911
1532-2432
DOI:10.1080/00397911.2011.557516