One-Pot Synthesis of Pyrano[2,3-b]quinolines from Enaminones under Solvent-Free Conditions

[摘要]：A facile and efficient one-pot synthesis of pyrano[2,3-b]quinolines has been developed via the Combes-type reaction of readily available enaminones, 2-arylamino-3-acetyl-5,6-dihydro-4H-pyrans, mediated by trifluoromethanesulfonic acid under solvent-free conditions.

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