Synthesis of 5H-1, 2-dihydro-2, 5-dioxochromeno [2,3-b] pyridines
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Some representative 5H-1,2-dihydro-2,5-dioxochromeno[2,3-b]pyridines have been prepared by condensation of 2-isocyanatochromone (obtained by Curtius rearrangement of the azide of chromone-2-carboxylic acid) with enamines, followed by cyclization.
KeywordsOrganic Chemistry Pyridine Azide Enamine Curtius Rearrangement
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