Pyridazines. XXXVII. Novel triazanaphthalene derivatives via intramolecular cyclization reactions of vic??disubstituted pyridazines

…, N Haider, G Heinisch, J Moshuber

Index: Boamah, Philip Yaw; Haider, Norbert; Heinisch, Gottfried; Moshuber, Joeran Journal of Heterocyclic Chemistry, 1988 , vol. 25, p. 879 - 883

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Citation Number: 3

Abstract

Abstract 8-Phenylpyrido [3, 4-d] pyridazines bearing various amino substituents at C-5 (7a-d, 8) were prepared from ethyl 5-benzyl-4-pyridazinecarboxylate 1 via the fused pyridone 5. The isomeric 4-phenylpyrido [2, 3-d] pyridazines having the amino functions attached to C-2 (10a-f) were obtained by a one-pot cyclization of the amino ketone 1 with appropriate acetamide acetals. These novel triazanaphthalene derivatives are of interest as ...