Chemistry of Heterocyclic Compounds p. 976 - 980 (1991)
Update date:2022-08-04
Topics:
Desenko, S. M.
Orlov, V. D.
Lipson, V. V.
Estrada, Kh.
Cyclocondensation of 2-aminobenzimidazole with unsaturated ketones or the hydrochlorides of Mannich bases has yielded aromatic substituted 1,4(3,4)-dihydropyrimido<1,2-a>benzimidazoles.The dependence of the tautomer composition of the products on steric factors and on the electronic character of the substituents introduced has been studied.
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