Synthesis and Intramolecular Azo Coupling of 4-Diazopyrrole-2-carboxylates: Selective Approach to Benzo and Hetero [c]-Fused 6 H-Pyrrolo [3, 4-c] pyridazine-5- …

EE Galenko, AV Galenko, AF Khlebnikov…

Index: Dattolo, Gaetano; Cirrincione, Girolamo; Almerico, Anna Maria; Presti, Giuseppe; Aiello, Enrico Heterocycles, 1984 , vol. 22, # 10 p. 2269 - 2276

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Abstract

... furo[3,2-c]pyrrolo[2,3-e]pyridazine 7, and other fused heterocycles (Scheme 1 ... and blue, respectively.(7e) Such a possibility of managing the color of the heterocyclic system by protonation, alkylation, or complexation of a certain skeletal nitrogen atom of the heterocycle is very ...