AlCl3 and SbCl3 were applied in this reaction to give excellent results. The best result was obtained in a high yield of 97.0% when 400 W microwaves were used for 10 min.

• 金属Lewis酸AlCl3和SbCl3用作本反应的催化剂可以取得良好的效果；其中SbCl3效果最好；用于400W微波加热反应10min可得到97.；0%25的收率。