Some coumarin derivatives are synthesized from corresponding phenols through condensation with acetylacetic ester under microwave irradiation,with catalytical amount of phosphoric acid being added.

• 用磷酸作催化剂,采用微波辐射方式,以酚类化合物和乙酰乙酸乙酯为原料进行缩合反应,合成香豆素衍生物。