Synthesis of some 3??substituted [1, 8] naphthyrido [3, 2??c][1, 8] naphthyridines. A new heterocyclic ring system

PL Ferrarini, G Biagi, O Livi…

Index: Ferrarini; Biagi; Livi; et al. Journal of Heterocyclic Chemistry, 1981 , vol. 18, # 5 p. 1007 - 1010

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Abstract

Abstract Some 3-substituted-5, 6-dihydro [1, 8] naphthyrido [3, 2-c][1, 8] naphthyridines (V) were obtained by the condensation of 7-substituted-2, 3-dihydro-1, 8-naphthyridin-4-(1H) ones (IV) with 2-aminonicotinaldehyde. All of the 5, 6-dihydro derivatives V were transformed into the fully aromatic compounds VI by refluxing with nitrobenzene.

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