Bulletin of the Academy of Sciences of the USSR Division of Chemical Science p. 2262 - 2266 (1991)
Update date:2022-08-04
Topics:
Dorokhov, V.A.
Gordeev, M.F.
Dem'yanets, Z.K.
Vorontsova, L.G.
Kurella, M.G.
et al.
3-Phenyl-5-methyl(phenyl)-1H,3H-pyrimido<4',5':4,5>pyrimido<1,2-a>benzimidazole-2,4-diones were obtained by the cyclization of N-phenyl-N'-<3-ethoxycarbonyl-4-methyl(phenyl)pyrimido<1,2-a>benzimidazol-2-yl>ureas by the action of potassium carbonate. 2-Met
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