Chemistry of Heterocyclic Compounds p. 209 - 214 (1983)
Update date:2022-09-26
Topics:
Kuz'menko, V. V.
Kuz'menko, T. A.
Simonov, A. M.
Pyridazino/1,6-a/benzimidazolium cations and 1-(o-methylaminoaryl)-4-acetylpyrazoles are formed simultaneously in approximately equal amounts in the reaction of excess acetylacetone with quaternary 1-aminobenzimidazolium salts in aqueous potassium carbonate solution.Mesoionic pyridazinobenzimidazoles and the corresponding 4-ethoxycarbonylpyrazoles were obtained with acetoacetic ester under similar conditions.
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