Preparation method of ethofenprox

The invention relates to the field of preparation of compounds, and concretely relates to a preparation method of ethofenprox. The ethofenprox has a structure represented by formula I shown in the description. The method comprises the following steps: 1, synthesizing an intermediate m-phenoxybenzyl chlorosulfite (II); and 2, carrying out an etherification reaction on 2-(4-ethoxyphenyl)-2-methylpropanol (III) and the m-phenoxybenzyl chlorosulfite (II) to generate the ethofenprox. The preparation method of ethofenprox is different from Williamson ether synthesis method in present technologies, effectively reduces the generation of byproducts in the reaction process, and has a higher yield than present industrial routes in the whole preparation process, so the preparation method provided by the invention is suitable for industrial production. 本发明涉及化合物制备领域，具体地，涉及种醚菊酯的制备方法，醚菊酯具有式I所示结构，包括以下步骤：(1)中间体氯代亚硫酸间苯氧基苄酯(II)的合成；(2)2-(4-乙氧基苯基)-2-甲基丙醇(III)与氯代亚硫酸间苯氧基苄酯(II)的醚化反应生成醚菊酯；本发明的醚菊酯制备方法不同于现有工艺中的威廉姆逊(Williamson)醚合成法，能够有效减