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Abdel-Latif, F.F.,Ahmed, E.Kh.,Mekheimer, R.,Mashaly, M.M. The Pharmaceutical Society of Korea 1997 Archives of Pharmacal Research Vol.20 No.5
Several new spiro compounds were synthesized via one-pot ternary condensation of isatin, malononitrile and each of thiobarbituric acid, barbituric, 3-methyl-pyrazolin-5-one, 1-phenyl-3-methyl-pyrazolin-5-one, acetylacetone, benzoylacetone, ethyl acetoacetate, phenacyl cyanide or ethyl-cyanoacetate dimer. Structures and reaction mechanisms were reported and supported via a second synthetic route.