Benzimidazole Condensed Ring Systems, III. Synthesis of Some Substituted 2,3-Dihydrocyclopenta-1H-pyridobenzimidazole-11-carbonitriles

Article abstract of DOI:10.1007/BF00809651

The synthesis of compound 3 by condensing 1H-benzimidazole-2-acetonitrile (1) with ethyl cyclopentanone-2-carboxylate (2) in the presence of ammonium acetate is described.Methylation of 3 with trimethyl phosphate yielded the N-methyl derivative 4.Methods