Lanthanum triflate as a capable catalyst for the synthesis of xanthenediones

The main purpose of this work was proposing a versatile and capable method for the synthesis of diverse xanthenediones from the three-component condensation reaction of two moles of dimedone and one mole of various aldehydes by the lanthanum triflate catalyst in solvent-free conditions at 60 degrees C. The products were characterized by comparison of their melting points, IR, and NMR spectra with authentic samples.