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

EL Moyano, JP Colomer…

Index: Moyano, Elizabeth L.; Colomer, Juan Pablo; Yranzo, Gloria I. European Journal of Organic Chemistry, 2008 , # 19 p. 3377 - 3381

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Citation Number: 9

Abstract

Abstract 7-Substituted 3, 7-dihydro-4H-pyrazolo [3, 4-d][1, 2, 3] triazin-4-ones 2a–d were conveniently prepared by direct diazotization 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 mechanistic exlpanation of the observed process is proposed.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)