3-Amino-4-hydroxy-6-phenylpyrano[3,2-c]quinoline-2,5(6H)-dione was produced by a smooth reduction of its nitro precursor. Reaction of this 3-amino-4-hydroxypyranoquinoline derivative with different electrophiles, leading to a variety of oxazolo and oxazinopyrano[3,2-c]quinoline derivatives, was described. The structure of the new products was elucidated via elemental analysis, IR, H-1 NMR, C-13 NMR, and mass spectra. Also, screening the antitumor activity of new compounds against two human cell lines (HepG-2 and HCT-116) was carried out. Some new products showed significant antitumor activities.
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