Chemistry of Heterocyclic Compounds p. 314 - 318 (1983)
Update date:2022-08-04
Topics:
Kuz'menko, V. V.
Komissarov, V. N.
Simonov, A. M.
The action of acetyl- and benzoylacetone on 1-aminobenzimidazoles in the presence of catalytic amounts of zinc chloride was used to synthesize 1-ylidene derivatives, which at higher temperatures undergo thermal cyclization to 2,4-disubstituted pyridazino<1,6-a>benzimidazoles.
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