Synthesis 1996; 1996(4): 533-536
DOI: 10.1055/s-1996-4231
paper
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Synthesis of 1-Substituted and 1-Unsubstituted 4-Sulfonamid0-1H-pyrazol-5(2H)-ones

Antonio Arcadi, Orazio A. Attanasi, Lucia De Crescentini, Elisabetta Rossi, Franco Serra-Zanetti*
  • *Istituto di Chimica Organica della Facoltà di Scienze, Università di Urbino, Piazza della Repubblica 13, I-61029 Urbino, Italy, Fax +39(722)2907
Further Information

Publication History

Publication Date:
31 December 2000 (online)

4-Sulfonamido-1H-pyrazol-5(2H)-ones bearing different substituent groups on the nitrogen atom in position 1 were easily obtained by reaction of conjugated azoalkenes with sulfonamides under mild conditions. 1-Unsubstituted title compounds were smoothly obtained by solvolytic cleavage of the substituent groups in methanol under reflux.

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