The influences of the catalyst, activator, acetic anhydride and thermostatic reaction temperature and time on the yield of coumarin were studied.

• 用 HPL C跟踪反应过程 ；对催化剂和活化剂的用量、乙酸酐的用量和用法及保温反应的温度和时间对香豆素收率的影响进行了研究 .