Utilization of 2-ylidene-4-thiazolidinones in the synthesis of heterocyclic compounds. Part I: Synthesis of pyrazoles

Arabian Journal of Chemistry(2011)

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Abstract
2-Ylidene and 2,5-diylidene-4-thiazolidinones 2a–d were synthesized and converted into pyrazole derivatives 4a–d by reaction with hydrazine hydrate. A mechanism of this novel conversion is suggested.
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Key words
2-Ylidene-4-thiazolidinones,2,5-Diylidene-4-thiazolidinones,5-(Phenylamino)-1H-pyrazoles
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