α-amidoalkylation reactions and oxidation of adducts of benzimidazoles and acyl chlorides
Adducts 4 of benzimidazoles and acyl chlorides were successfully used as electrophilic reagents in an intermolecular α-amidoalkylation reaction toward ketones for synthesis of 2-(2-oxoalkyl)-1,3-diacyl-2,3- dihydrobenzimidazoles 6 and oxidized with KMnO4 to 1,3-diacyl-2,3- dihydrobenzimidazol-2-ones 7.