Synthesis of 1-Substituted and 1-Unsubstituted 4-Sulfonamid0-1H-pyrazol-5(2H)-ones
作者:Antonio Arcadi、Orazio A. Attanasi、Lucia De Crescentini、Elisabetta Rossi、Franco Serra-Zanetti
DOI:10.1055/s-1996-4231
日期:1996.4
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.