Studies on Heterocyclic Compounds. XX. The Reaction of the Oxazolo [3, 2-b] pyridazinium Perchlorates with Hydrazines

K SATOH, T MIYASAKA, K ARAKAWA

Index: Satoh, Kazue; Miyasaka, Tadashi; Arakawa, Kiichi Chemical and Pharmaceutical Bulletin, 1982 , vol. 30, # 5 p. 1557 - 1566

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Abstract

On treatment with hydrazine hydrate (80%) and methylhydrazine, oxazolo [3, 2-b] pyridazinium perchlorates (I) furnish hemi-perchlorates of 4H-pyridazino [6, 1-c][1, 2, 4] triazines (VI) and 1-methyl-4H-pyridazino [6, 1-c][1, 2, 4] triazinium perchlorates (VIII), respectively. On reaction with phenylhydrazine by refluxing in acetonitrile, I affords an osazone (XII), a phenylazopyridazine (XIII) and its hydrazo derivative (XIV), which are also ...