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Keywords
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Mg(HSO4)2, 1, 3-diketones, hydrazine, pyrazole, 1,3,5-substituted pyrazoles,
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Abstract
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Mg(HSO4)2 is an efficient, readily available, and eco-friendly catalyst for the synthesis of 1,3,5-trisubstituted or 1,3,4,5-tetrasubstituted pyrazoles via the condensation of 1,3-diketones and hydrazine. Mild condition, simplicity of procedure, high yields, easy work-up and short reaction time are some advantages of this green protocol.
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