Application of Heterocyclic Diazonium Salts: Synthesis of New Pyrazolo[3,4-d][1,2,3]triazin-4-ones

ELIZABETH LAURA MOYANO; JUAN PABLO COLOMER; GLORIA INÉS YRANZO

WILEY-VCH Verlag GmbH & Co. KGaA

Lugar: Weinheim; Año: 2008 p. 3377 - 3377

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