3-Nitropyrimido[1,2-a]benzimidazol-4-ones: synthesis and study of alkylation reaction

The reactions of benzimidazol-2-amines with ethyl 3-ethoxy-2-nitroacrylate were used to synthesize a series of pyrimido[1,2-a]-benzimidazoles. An alkylation reaction of the obtained compounds was studied.