Abstract
We design and describe here a simple route for the synthesis of a new multi heterocycle fused 1,4-oxazinopyranoquinolinones compatible with many functional groups. This method proceeds through various cyclic condensation reactions of (3-amino or 3-nitropyrano)[3,2-c] quinoline-2,5(6H)-dione precursors with different 1,2-bifunctional electrophiles. The synthesized compounds are confirmed by infrared (IR), proton (H-1) and carbon-13 (C-13) nuclear magnetic resonance (NMR) spectroscopy and electrospray ionization mass spectrometry (ESI-MS).