Synthesis of 3-Substituted 7-Methyl-5<i>H</i>-pyrazole[4,3-<i>d</i>]-1,2,3-triazin- 4(3<i>H</i>)-ones and Amide-<i>N</i>-Substituted 3-Methyl-4-diazopyrazole-5-carboxamides
作者:P. G. Baraldi、A. Casolari、M. Guarneri、S. Manfredini、G. P. Pollini、D. Simoni、V. Zanirato
DOI:10.1055/s-1988-27473
日期:——
Diazotization of amide-N-substituted 4-amino-3-methylpyrazole-5-carboxamides 4 with sodium nitrite and acetic acid produces 3-substituted 7-methyl-5H-pyrazolo[4,3-d]- 1,2,3-triazin-4(3H)-ones 6 or amide-N-substituted 3-methyl-4-diazopyrazole- 5-carboxamides 5, depending on the substitution pattern.