New Application of Heterocyclic Diazonium Salts: Synthesis of New 1

E. L. MOYANO; J. P. COLOMER; G. I. YRANZO

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY

Wyley Interscience

Año: 2008

1434-193X

7-Substituted 3,7-dihydro-4H-pyrazolo[3,4-d][1,2,3]triazin-4- ones 2a–d were conveniently prepared by direct diazotiza- 6H-pyrazolo[3,4-d][1,2,3]triazin-4- ones 2a–d were conveniently prepared by direct diazotiza- 62a–d were conveniently prepared by direct diazotiza- 6 tion of 5-aminopyrazole-4-carbonitriles 1a–d in HCl media. Different reaction conditions and the effects of substituents on N-1 of the pyrazole ring were studied. A possible mechanistic1a–d in HCl media. Different reaction conditions and the effects of substituents on N-1 of the pyrazole ring were studied. A possible mechanisticon N-1 of the pyrazole ring were studied. A possible mechanistic exlpanation of the observed process is proposed.