A Facile Route to Pyrrolo[3′,4′:3,4]pyrido[1,2-<i>a</i>]benzimidazoles, Novel Heterocyclic Derivatives
作者:Anton V. Tverdokhlebov、Alexander D. Tereshchenko、Andrey A. Tolmachev
DOI:10.1055/s-2004-815950
日期:——
condensation of 2-benzimidazoleacetonitrile with ethyl 4-chloro-3-oxobutanoate led to the 3-chloromethyl-1,5-dihydro-1-oxopyrido[1,2-a]benzimidazole-4-carbonitrile. Further amination of the obtained chloronitrile with primary amines yielded 1-amino-2,3-dihydro-2-R-5H-pyrrolo[3′,4′:3,4]pyrido[1,2-a]benzimidazol-5-ones.