Abstract
The condensation reaction of chalcone and 1,3-cyclohexanedione was smoothly carried out in [bmim][BF4] with catalysis by FeCl3·6H2O. A series of substituted pyrans were obtained by this reaction, in high yields under mild conditions through a simple operational procedure. In addition, the ionic liquid together with the catalyst used can be conveniently recovered and efficiently reused.
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