除草剂烯草酮关键中间体的连续化合成工艺
任世伦 , 黄城 , 陈见爱 , 李蜜蜜 , 马景瑞 , 袁其亮 , 谭成侠
高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (12) : 37 -45.
除草剂烯草酮关键中间体的连续化合成工艺
Continuous Synthesis Process of Key Intermediates for the Herbicide Clethodim
烯草酮具有高效、 低毒、 杀草谱广、 施用期长以及对后茬作物安全等特点, 已成为环己烯酮类除草剂的代表性品种. 5-[2-(乙硫基)-丙基]-2-丙酰基-3-羟基-2-环己烯-1-酮(简称精三酮)作为烯草酮的关键中间体, 其传统间歇式合成工艺存在反应效率低、 能耗较大等问题. 本文基于微通道连续流技术, 开发了关键步骤的连续化合成工艺. 通过优化环合与水解步骤, 将反应时间从90 min缩短至4.8 min, 产物收率达65.2%, 纯度为95.2%. 该工艺显著提升了反应效率和产物质量, 为烯草酮的工业化生产提供了新方法.
Clethodim, known for its high efficacy, low toxicity, broad herbicidal spectrum, extended application window and safety to subsequent crops, has become a representative cyclohexenone herbicide. 5-[2-(Ethylthio) propyl]-2-propionyl-3-hydroxy-2-cyclohexen-1-one(abbreviated as Jing-Santong), a key intermediate of clethodim, faces challenges in traditional batch synthesis, such as low reaction efficiency and high energy consumption. This study developed a continuous-flow microchannel technology for the critical synthesis steps. By optimizing the cyclization and hydrolysis processes, the reaction time was reduced from 90 min to 4.8 min, achieving a 65.2% yield and 95.2% purity. The novel process significantly improves reaction efficiency and product quality, offering a promising approach for the industrial production of clethodim.
Herbicide / Clethodim / Microchannel continuous flow technology / Synthesis process
支持信息见 http: //www.cjcu.jlu.edu.cn/CN/10.7503/20250187.
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一帆生物科技集团股份有限公司资助项目(KYY-HX-20240994)
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