The reaction of pyrazolo[4,3‐c][1,2,5]oxadiazin‐3(5H)‐ones 1 with carbanions prepared in situ from compounds containing an activated methylene group afforded pyrazolo[3,4‐b]pyrazines 4–13 in good yields. The possible reaction mechanism is proposed and discussed. Copyright © 1986 Journal of Heterocyclic Chemistry
Reactivity of Pyrazolo[4,3-c] [1,2,5]oxadiazin- 3(5H)-ones toward C-nucleophiles: Synthesis of Pyrazolo[3,4-b] pyrazines
GIORI, Paolo;VERONESE, Augusto;VICENTINI, Chiara Beatrice;MANFRINI, Maurizio;GUARNERI, Mario
1986
Abstract
The reaction of pyrazolo[4,3‐c][1,2,5]oxadiazin‐3(5H)‐ones 1 with carbanions prepared in situ from compounds containing an activated methylene group afforded pyrazolo[3,4‐b]pyrazines 4–13 in good yields. The possible reaction mechanism is proposed and discussed. Copyright © 1986 Journal of Heterocyclic ChemistryFile in questo prodotto:
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