Journal of heterocyclic chemistry

A novel approach to the pyrido [4, 3??c] pyridazine ring. Synthesis of pyrido [4, 3??c] pyridazin??5 (6H)??one from 3, 4??disubstituted pyridazines

JP Vors

Index: Vors, Jean-Pierre Journal of Heterocyclic Chemistry, 1991 , vol. 28, # 4 p. 1043 - 1046

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Citation Number: 13

Abstract

Abstract The synthesis of new pyrido [4, 3-c] pyridazin-5 (6H)-one from ethyl 3-methyl-4- pyridazinecarboxylate using an enamination/ring closure sequence is described. The starting material is easily available from a hetero Diels-Alder reaction between a 1, 2-diaza-