2,4-CYCLOADDITION REACTIONS: PREPARATION AND CYTOTOXICITY OF NOVEL QUINOLINE AND PYRROLO [3,4-f] QUINOLINE DERIVATIVES
Keywords:Quinolones, Pyrroloquinolines, Cycloaddition, Anti-tumor cytotoxicity
Objective: the present work aimed to synthesize novel quinoline and pyrroloquinoline derivatives and study their cytotoxic activity.
Methods: Dielsâ€“Alder reaction (4+2) was used for the synthesis of new quinolone and pyrrolo quinoline derivatives via the reactions of compound 1 with N-maleimide (4a-d) derivatives, ethyl acrylate (6) methylmethacrylate (8) and acetylene dicarboxylic acid (10). The synthesized compounds were characterized by NMR and Mass spectral data. Some of the synthesized compounds were screened for their antitumor activity against three different cell lines (MCF-7, HepG2 and HCT).
Results: The tested compounds exhibited antiproliferative activity against the three different cell lines, especially against MCF-7.
Conclusion: New quinoline and pyrroloquinoline derivatives were synthesized starting with 6-methyl-4-phenyl-2-thioxo-5-(4-methylphenylthio)-1,2-dihydropyridine-3-carbonitrile. Two new compounds 3 and 5a were tested for their in vitro antiproliferative activity against MCF-7, HepG2 and HCT cancer cell lines. The result showed that compound 3 exhibited more potent antiproliferative activity than compound 5a in case of MCF-7 and HCT cell lines.
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