86805-03-0Relevant articles and documents
QUATERNARY 1-AMINOBENZIMIDAZOLIUM SALTS IN REACTIONS WITH β-DICARBONYL COMPOUNDS. FORMATION OF PYRIDAZINO/1,6-a/BENZIMIDAZOLIUM CATIONS AND 1-ARYLPYRAZOLES
Kuz'menko, V. V.,Kuz'menko, T. A.,Simonov, A. M.
, p. 209 - 214 (2007/10/02)
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.