Using KF-Al 2O 3 as catalyst, chalcones were synthesized by ultrasound irradiation. The influence of some factors on the product yield, such as the ultrasound irradiation power and time, was investigated and the optimum experimental conditions were found. When ultrasound irradiation power was 250 W, the yield of the product could be above 95% in 30 min, with the exception of 3b. Compared with traditional methods, this method is more convenient due to the milder conditions, shorter reaction time and higher yields.
Chinese Journal of Organic Chemistry