Abstract
2-Hydrazinyltetrahydropyrimido [4, 5-b] quinolin-4(3H)-one (3) was prepared by desulfurization reaction of S- and N-dimethyl derivatives 2 with hydrazine hydrate. Reactions of (3) with malonitrile, carbondisulfide, potassium thiocyanate, phthalic anhydride and aromatic aldehydes afforded 3, 5-di aminopyrazolopyrimido [4, 5-b] quinoline (4), triazolotetrahydropyrimido [4, 5-b] quinoline (5), aminotriazolopyrimido [4, 5-b] quinoline (6), aminophthalimidopyrimido [4, 5-b] quinoline (7) and N-arylidene hydrazinepyrimido [4, 5-b] quinoline 8a–d, respectively. Furthermore, 8a–d reacted with mercaptoacetic acid gave the thiazolidinonepyrimido [4, 5-b] quinoline 9a–d, which afforded the thiazolotriazolopyrimido [4, 5-b] quinolinone 10a–d upon treatment with ethanolic potassium hydroxide. The newly synthesized compounds were characterized by elemental analyses, IR, 1H-NMR, 13C-NMR and mass spectrometer. The investigated compounds were screened for their cytotoxicity. Compounds 4, 6 and 5 exhibited potent antitumor activity.
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Abu-Hashem, A.A., Aly, A.S. Synthesis of new pyrazole, triazole, and thiazolidine-pyrimido [4, 5-b] quinoline derivatives with potential antitumor activity. Arch. Pharm. Res. 35, 437–445 (2012). https://doi.org/10.1007/s12272-012-0306-5
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DOI: https://doi.org/10.1007/s12272-012-0306-5