- Synthesis of 3-Substituted 5(H)-Oxobenzopyranopyridines and 2,3-Diaryl-4(H)-oxobenzoypyrano-pyrroles
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A novel synthesis of coumarins with a pyridine or pyrrole ring fused at 3,4-postion is described.It involves the reaction of 4-aminocoumarin (II) with substituted malonaldehydes and benzoins to afford 3-substituted 5(H)-oxobenzopyranopyridines (IV, VI) and 2,3-diaryl-4(H)-oxobenzoypyranopyrroles (VIII,IX), respectively.Th pyrrolocoumarins (VIII,IX) produce strongly fluorescent green solution in alklai but do not exhibit much fluorescence in neutral solution.
- Joshi, S. D.,Sakhardande, V. D.,Seshadri, S.
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p. 206 - 208
(2007/10/02)
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