苹果酯-B的合成

Synthesis of Apple EsterB

硫酸铝作为催化剂，催化乙酰乙酸乙酯和１，２-丙二醇反应合成苹果酯Ｂ。反应条件：０２ｍｏｌ乙酰乙酸乙酯，０４ｍｏｌ１，２丙二醇，４０ｍｌ苯，３ｇ硫酸铝，反应1.5ｈ，苹果酯-Ｂ的收率达９０２％。

Apple esterB was synthesized by reaction of ethyl acetyl acetate and 1,2propanediol,and aluminium sulfate as catatlyst.The optimum conditions were found out as follows:the ratio of ethyl acetyl acetate to 1,2propanediol to benzene to aluminium sulfate was 0.2 mol to 0.4 mol to 40ml to 3g for 1.5 hours.On these conditions the yield reached 90.2%.