One-Pot Synthesis of Pyrano[3,4-b]chromones from Chromone-3-carbaldehyde

[摘要]：3-Formylchromone reacts with cyclohexyl isocyanide to produce pyrano[3,4-b]chromone, which rearranges to 1-benzopyrano[2,3-c]pyridine when heated with HCl in ethanol.

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