ChemInform Abstract: A Simple Synthesis
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Y. YAMADA; H. YASUDA; K. YOSHIZAWA
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Article
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2010
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John Wiley and Sons
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A Simple Synthesis of 1-Substituted 5-Aminopyrazoles and Pyrazolo[1,5-a]-s-triazine Derivative. -The title compounds (III) are synthesized directly by cyclization of hydrazine derivatives (II) with (E)-2,3-dicyano-butendioates (I) in the presence of organic salts. The reaction is assumed to proceed