Synthesis method of plant root inhibitor

The invention discloses a synthesis method of a plant root inhibitor, which comprises the following steps: by taking S-methyl lactate as a raw material, carrying out ester exchange with n-caprylic alcohol under the action of a catalyst to generate S-n-octyl lactate, removing redundant n-caprylic alcohol, esterifying with methylsulfonyl chloride, and finally etherifying with p-chloro-o-cresol potassium salt to synthesize the plant root inhibitor. The synthetic route is simple and convenient in method, simple in post-treatment, less in three wastes, high in yield and low in cost, and has good practicability, economical efficiency and production and application prospects. 本发明公开了一种植物根系抑制剂的合成方法，本发明以S-乳酸甲酯为原料，在催化剂作用下与正辛醇发生酯交换生成S-乳酸正辛酯，脱除多余正辛醇，与甲基磺酰氯进行酯化，最后与对氯邻甲酚钾盐进行醚化合成植物根系抑制剂。本发明的合成路线方法简便、后处理简单、三废较少、产率高、成本低，有很好的实用性、经济性和生产应用前景。