Green Synthesis of Mesotrione
He Xiaoqiang;Yang Xinyao;Shen Qiong;Chongqing Huage Biochemistry limited Company;
The aim is to synthesize mesotrione a new herbicide environmental-friendly. Mesotrion was synthesized from 2-Nitro-4-methylsulfonylbenzoic acid via chlorination, condensation and rearrangement by three steps. In chlorination reaction, bis(trichloromethyl) carbonate was used instead of conventional thionyl chloride. In rearrangement reaction, acetonitrile was selected as catalyst instead of highly toxic substances potassium cyanide and acetone cyanohydrin. This method,which greatly reduced the damage to the environment and improved the safety factor during the synthesis of mesotrione, is suitable for industrial production. Under optimal conditions, the total yield of mesotrione is 87. 0% and the purity is more than 95. 0%.
【CateGory Index】： TQ457