The yield of the ester could reach 99 % under amount of substance ratio of lactic acid, isopentyl alcohol and ferric chloride were 1:2 = 0.027, refluxing and water segrating for 60min.

• 当乳酸、异戊醇和三氯化铁的物质量比为1:2:0.；027；回流分水60分钟；酯收率99%25。